We thank Dr. Roger Hopper and the Wyoming Department of Agriculture, Analytical Services Lab for the mass spectroscopy analysis of our samples. We would like to express our gratitude to the University of Wyoming, School of Pharmacy for allowing us to video this protocol in their laboratories. We would also like to thank the Theodore O. and Dorothy S. King Endowed Professorship Agreement for their graduate assistantship (SC), the University of Wyoming for the Graduate Assistantship support (JRS), and the Science Posse (NSF GK-12 Project # 084129) for the teaching fellowship (JRS). We would also like to thank Uranium One for allowing us to obtain samples and assisting us with questions. This work was supported by the School of Energy Resources, University of Wyoming.

<ol>
	<li>Qu, X., Alvarez, P., Li, Q. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Applications+of+nanotechnology+in+water+and+wastewater+treatment.">Applications of nanotechnology in water and wastewater treatment.</a> Water Research. 47 (12), 3931-3946 (2013).</li><li>Martinson, C., Reddy, K. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Adsorption+of+arsenic(III)+and+arsenic(V)+by+cupric+oxide+nanoparticles.">Adsorption of arsenic(III) and arsenic(V) by cupric oxide nanoparticles.</a> Journal of Colloid and Interface Science. 336 (2), 401-411 (2009).</li><li>Reddy, K., McDonald, K., King, H. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=A+novel+arsenic+removal+process+for+water+using+cupric+oxide+nanoparticles.">A novel arsenic removal process for water using cupric oxide nanoparticles.</a> Journal of Colloid and Interface Science. 397, 96-102 (2013).</li><li>Reddy, K., Roth, T. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Arsenic+Removal+from+Natural+Groundwater+Using+Cupric+Oxide.">Arsenic Removal from Natural Groundwater Using Cupric Oxide.</a> Ground Water. 51 (1), 83-91 (2012).</li><li>Zhang, G., Ren, Z., Zhang, X., Chen, J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Nanostructured+iron(III)-copper(II)+binary+oxide:+a+novel+adsorbent+for+enhanced+arsenic+removal+from+aqueous+solutions.">Nanostructured iron(III)-copper(II) binary oxide: a novel adsorbent for enhanced arsenic removal from aqueous solutions.</a> Water Research. 47 (12), 4022-4031 (2013).</li><li>Ali, I. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=New+generation+adsorbents+for+water+treatment.">New generation adsorbents for water treatment.</a> Chemical Reviews. 112 (10), 5073-5091 (2012).</li><li>Zhang, Q. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=CuO+nanostructures:+Synthesis,+characterization,+growth+mechanisms,+fundamental+properties,+and+applications.">CuO nanostructures: Synthesis, characterization, growth mechanisms, fundamental properties, and applications.</a> Progress in Materials Science. 60, 208-337 (2014).</li><li>Schmidt, C. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=TOX+21:+new+dimensions+of+toxicity+testing.">TOX 21: new dimensions of toxicity testing.</a> Environmental health perspectives. 117 (8), 348-353 (2009).</li><li>Firestone, M., Kavlock, R., Zenick, H., Kramer, M. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=The+U.S.+Environmental+Protection+Agency+Strategic+Plan+for+Evaluating+the+Toxicity+of+Chemicals.">The U.S. Environmental Protection Agency Strategic Plan for Evaluating the Toxicity of Chemicals.</a> Journal of Toxicology and Environmental Health, Part B. 13 (2-4), 139-162 (2010).</li><li>Bae, D., Gennings, C., Carter, W., Yang, R., Campain, J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Toxicological+interactions+among+arsenic,+cadmium,+chromium,+and+lead+in+human+keratinocytes.">Toxicological interactions among arsenic, cadmium, chromium, and lead in human keratinocytes.</a> Toxicological Sciences: An Official Journal of the Society of Toxicology. 63 (1), 132-142 (2001).</li><li>Whittaker, M. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Exposure+to+Pb,+Cd,+and+As+mixtures+potentiates+the+production+of+oxidative+stress+precursors:+30-day,+90-day,+and+180-day+drinking+water+studies+in+rats.">Exposure to Pb, Cd, and As mixtures potentiates the production of oxidative stress precursors: 30-day, 90-day, and 180-day drinking water studies in rats.</a> Toxicology and Applied Pharmacology. 254 (2), 154-166 (2011).</li><li>Schilz, J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=.">.</a> Investigating the ability of cupric oxide nanoparticles to adsorb metal contaminants from uranium in-situ recovery (ISR) production bleed water and assessing the associated changes in cytotoxicity. , (2014).</li><li>Florea, A., Splettstoesser, F., B&#252;sselberg, D. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Arsenic+trioxide+(As2O3)+induced+calcium+signals+and+cytotoxicity+in+two+human+cell+lines+SY-5Y+neuroblastoma+and+293+embryonic+kidney+(HEK).">Arsenic trioxide (As2O3) induced calcium signals and cytotoxicity in two human cell lines SY-5Y neuroblastoma and 293 embryonic kidney (HEK).</a> Toxicology and Applied Pharmacology. 220 (3), 292-301 (2007).</li><li>Mao, W. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Cadmium+induces+apoptosis+in+human+embryonic+kidney+(HEK)+293+cells+by+caspase-dependent+and+-independent+pathways+acting+on+mitochondria.">Cadmium induces apoptosis in human embryonic kidney (HEK) 293 cells by caspase-dependent and -independent pathways acting on mitochondria.</a> Toxicology in Vitro. 21 (3), 343-354 (2007).</li><li>Tchounwou, P., Yedjou, C., Patlolla, A., Sutton, D. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=.">.</a> Heavy Metal Toxicity and the Environment. Molecular, Clinical and Environmental Toxicology. 101, 133-164 (2012).</li><li>Meerloo, J., Kaspers, G., Cloos, J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Cell+Sensitivity+Assays:+The+MTT+Assay.">Cell Sensitivity Assays: The MTT Assay.</a> Cancer Cell Culture. 731, 237-245 (2011).</li><li>Gustafsson, J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=.">.</a> Visual MINTEQ. , (2010).</li><li>Hallab, N., Caicedo, M., McAllister, K., Skipor, A., Amstutz, H., Jacobs, J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Asymptomatic+prospective+and+retrospective+cohorts+with+metal-on-metal+hip+arthroplasty+indicate+acquired+lymphocyte+reactivity+varies+with+metal+ion+levels+on+a+group+basis.">Asymptomatic prospective and retrospective cohorts with metal-on-metal hip arthroplasty indicate acquired lymphocyte reactivity varies with metal ion levels on a group basis.</a> Journal of Orthopaedic Research. 31 (2), 173-182 (2013).</li><li>Goswami, A., Raul, P., Purkait, M. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Arsenic+adsorption+using+copper+(II)+oxide+nanoparticles.">Arsenic adsorption using copper (II) oxide nanoparticles.</a> Chemical Engineering Research and Design. 90 (9), 1387-1396 (2011).</li><li>Pillewan, P., Mukherjee, S., Roychowdhury, T., Das, S., Bansiwal, A., Rayalu, S. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Removal+of+As(III)+and+As(V)+from+water+by+copper+oxide+incorporated+mesoporous+alumina.">Removal of As(III) and As(V) from water by copper oxide incorporated mesoporous alumina.</a> Journal of Hazardous Materials. 186 (1), 367-375 (2011).</li><li>Kroll, A. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Cytotoxicity+screening+of+23+engineered+nanomaterials+using+a+test+matrix+of+ten+cell+lines+and+three+different+assays.">Cytotoxicity screening of 23 engineered nanomaterials using a test matrix of ten cell lines and three different assays.</a> Particle and fibre toxicology. 8 (9), 1-19 (2011).</li><li>Fahmy, B., Cormier, S. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Copper+oxide+nanoparticles+induce+oxidative+stress+and+cytotoxicity+in+airway+epithelial+cells.">Copper oxide nanoparticles induce oxidative stress and cytotoxicity in airway epithelial cells.</a> Toxicology in vitro: an international journal published in association with BIBRA. 23 (7), 1365-1371 (2009).</li><li>Radike, M. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Distribution+and+accumulation+of+a+mixture+of+arsenic,+cadmium,+chromium,+nickel+and+vanadium+in+mouse+small+intestin,+kidney,+pancreas,+and+femur+following+oral+administration+in+water+or+feed.">Distribution and accumulation of a mixture of arsenic, cadmium, chromium, nickel and vanadium in mouse small intestin, kidney, pancreas, and femur following oral administration in water or feed.</a> Journal of Toxicology and Environmental Health, Part A. 65 (23), 2029-2052 (2002).</li><li>Barbier, O., Jacquillet, G., Tauc, M., Cougnon, M., Poujeol, P. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Effect+of+heavy+metals+on,+and+handling+by,+the+kidney.">Effect of heavy metals on, and handling by, the kidney.</a> Nephron. Physiology. 99 (4), 105-110 (2005).</li><li>Zheng, X., Watts, G., Vaught, S., Gandolfi, A. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Low-level+arsenite+induced+gene+expression+in+HEK293+cells.">Low-level arsenite induced gene expression in HEK293 cells.</a> Toxicology. 187 (1), 39-48 (2003).</li><li>Li, Z., Piao, F., Liu, S., Wang, Y., Qu, S. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Subchronic+exposure+to+arsenic+trioxide-induced+oxidative+DNA+damage+in+kidney+tissue+of+mice.">Subchronic exposure to arsenic trioxide-induced oxidative DNA damage in kidney tissue of mice.</a> Experimental and Toxicologic Pathology. 62 (5), 543-547 (2010).</li><li>Farombi, E., Akintunde, J., Nzute, N., Adedara, I., Arojojoye, O. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Municipal+landfill+leachate+induces+hepatotoxicity+and+oxidative+stress+in+rats.">Municipal landfill leachate induces hepatotoxicity and oxidative stress in rats.</a> Toxicology and Industrial Health. 28 (6), 532-541 (2011).</li><li>Das, N. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Arsenic+exposure+through+drinking+water+increases+the+risk+of+liver+and+cardiovascular+diseases+in+the+population+of+West+Bengal.">Arsenic exposure through drinking water increases the risk of liver and cardiovascular diseases in the population of West Bengal.</a> India. BMC public health. 12 (1), 639-648 (2012).</li><li>Valko, M., Morris, H., Cronin, M. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Metals,+toxicity+and+oxidative+stress.">Metals, toxicity and oxidative stress.</a> Current Medicinal Chemistry. 12 (10), 1161-1208 (2005).</li><li>Horie, M. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Protein+Adsorption+of+Ultrafine+Metal+Oxide+and+Its+Influence+on+Cytotoxicity+toward+Cultured+Cells.">Protein Adsorption of Ultrafine Metal Oxide and Its Influence on Cytotoxicity toward Cultured Cells.</a> Chemical Research in Toxicology. 22 (3), 543-553 (2009).</li></ol>

The authors have nothing to disclose.

מחקרים קודמים דיווחו כי CuO-צירופים והוסרו ארסן מ11,13,30,31 מי תהום. מחקר זה תומך בממצאים הקודמים אלה וגם מדווח כי CuO-צירופים והסרת מזהמים נוספים מPBW. מחקר זה גם מאשר דיווחים קודמים שCuO-צירופים ויעילים בהסרת ארסן, למרות נוכחותם של מזהמים אחרים ויונים מתחרים פוטנציאליי...

כ -20% מאספקת החשמל בארה&quot;ב מסופקים על ידי אנרגיה גרעינית ו, המבוססת בחלקו על תמריצים לאומיים להגדיל את עצמאות אנרגיה, ארה&quot;ב יכולת גרעינית צפויה להגדיל 1. צמיחה בעולם באנרגיה גרעינית גם צפויה להימשך, עם הרבה של הצמיחה המתרחשת מחוץ לארה&quot;ב 2. נכון לשנת 2013, 83% מהאורניום בארה&quot;ב היה מיובא, אבל 952544 טונות של עתודות קיימות בארה&quot;ב 3,4. בשנת 2013 היו 7 יישומי מתקן חדשים ויישומי 14 הפעלה מחדש / הרחבה בין יומינג, ניו מקסיקו, נברסקה ו5. בארה&quot;ב, אורניום מופק באמצעות רובה בהתאוששות באתרו (ISR) מעבד 6. ISR גורם להפרעת ארץ פחות ונמנע מיצירת ערימות עוקב שיכול לשחרר מזהמים סביבתיים 7. ISR משתמש פתרונות חמצון על בסיס מים ליץ אורניום מהגוף עפרות המחתרת, לאחר שהאורניום מופק באמצעות leachateתהליך חילוף יונים 8. כדי לשמור על מאזן מים שלילי בגוף עפרות, חלק מleachate, ייצור נקרא לדמם מים (PBW), הוא דימם מ. חלק מPBW הוא לחטא באמצעות אוסמוזה ההפוכה (RO) ומחדש הוכנס לתהליך הכרייה, אלא גם יש לי PBW יכול שימושים תעשייתיים או חקלאיים מועילים, אם ניתן להפחית מזהמים רעילים לרמות מקובלות נקבעו על ידי רשויות פיקוח מדינה למשטח ו תהום 9. נכון לעכשיו, רוב מתקני אורניום ISR להשתמש RO להסרת מזהמים מPBW. עם זאת, עיבוד RO הוא עתיר אנרגיה ומייצר מלח פסולת רעיל, אשר דורש סילוק מוסדר. שיטות טיהור מים רבות קיימות, כוללים חומרי ספיחה, קרומים, וחילוף יונים. מבין אלה, ספיחה היא נפוץ ביותר, וההתפתחויות האחרונות בסינתזת ננו-חלקיקים שיפרה את היכולות של טיהור מים מבוסס בעלי כושר ספיגה מעבד 10. oxi Cupricחלקיקי דה (CuO-NPS) בעבר לא נחקרו בהרחבה על אורניום ISR PBW, אבל במחקרים שנעשה לאחרונה להסרת מזהמים ממי תהום, CuO-צירופים ונמצאו יש תכונות ייחודיות, הכולל לא דורש צעדי טיפול לפני או אחרי-מים ( למשל, התאמת pH או פוטנציאל חיזור) ומתפקד היטב ביצירות מים שונות (לדוגמא, בPHS שונה, ריכוזי מלח, או יונים מתחרים) 11. בנוסף, CuO-הצירופים ומתחדשים בקלות על ידי שטיפה עם נתרן הידרוקסידי (NaOH), לאחר שניתן לעשות שימוש חוזר CuO-הצירופים ומחדש. פרטים של יכולות סינון עקבות מתכת CuO-NP ממים הטבעיים כבר פורסמו בעבר 11-14. למרות שימושי לטיפול במים, חלקיקי תחמוצת מתכת יכולים להיות רעילים ליצורים חיים, אבל במידה של הרעילות תלויה, בין שאר, על מאפייני ננו-חלקיקים ומרכיבים 10,15,16. לכן, חשוב ללמוד simultרעילויות aneous מזהמים ההסרה וננו-חלקיקים לפני יישומים בתחום. המחקר הנוכחי נקבע היכולת של CuO-צירופים ולהסרת מזהמי PBW עדיפות (כולל ארסן, סלניום, ונדיום ואורניום), והעריך את ההשפעה של טיפול CuO-NP ברעיל PBW. PBW נאסף ממתקן אורניום ISR פעיל ומנוצל כדי לקבוע את היעילות של טיפול CuO-NP בהסרת מזהמים עדיפות. רעיל PBW לפני ואחרי טיפול CuO-NP גם הוערך. PBW היא גיאולוגי מורכב תערובת (תעשייתית / סביבתית) ושניהם מהמכון הלאומי לבריאות הסביבה והמדע (NIEHS) והסוכנות לחומרים רעילים ורישום מחלות (ASTDR) תוך שימת דגש על לימוד הרעילות של תערובות רלוונטיות לסביבה, כוללים תערובות כפי שהם קיימים בהגדרות טבע או תעשייתי, כמו גם קידום בבדיקת מבחנה לתעדף כימיקלים לin vivo בדיקות נוספות17-19. מחקרים של חשיפות תערובת כרוניות, במינון נמוך מאתגרים כי חשיפה כרונית לתערובת במינון נמוכה לא לייצר אפקטים ברורים, לפחות לא במסגרת הזמן הקצרה של מרבית מחקרי המעבדה. כמו כן, רוב המחקרים במבחנה של תערובות כימיות לחשוף תאים לתערובת תוצרת מעבדה מוגדרת של 2 או יותר מתכות 20,21. מחקרים אלו מספקים מידע בסיסי, אבל תערובות פשוטות לא לשכפל את האינטראקציות עוינות וסינרגטי המורכבים שעלולות להתרחש במדגם מקורי, איכות סביבה, שבו המגוון הרחב של רכיבי תערובת נמצא. מטרותיו של מחקר זה היו לבחון תהליכי הסרת מזהמים חלופיים לPBW ולהעריך את ההשפעה של טיפול (CuO-NP) ברעיל PBW שימוש בתאי אדם בתרבית. התוצאות יכולות להפיק תועלת תעשיית האורניום באמצעות פיתוח שיטות יעילים יותר או ידידותיות לסביבה לסילוק מזהם. מחקר זה מספקהעדות הראשונה כי הפחתת מזהמי עדיפות בPBW ידי CuO-צירופים ומפחיתה רעילה בתאי יונקים 22.

<table border="0" cellpadding="0" cellspacing="0" width="892">
	<tbody>
		<tr height="21">
			<td height="21" style="height:21px;width:216px;">Name of Material/ Equipment</td>
			<td style="width:243px;">Company</td>
			<td style="width:119px;">Catalog Number</td>
			<td style="width:315px;">Comments/Description</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:216px;">CuCl2</td>
			<td style="width:243px;">Sigma</td>
			<td align="right" style="width:119px;">203149</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:216px;">Borosilicate glass balls</td>
			<td style="width:243px;">VWR</td>
			<td>26396-639</td>
			<td>6 mm</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:216px;">Nitric Acid</td>
			<td style="width:243px;">Fisher</td>
			<td>A509-P500</td>
			<td>Trace metal grade</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;">0.45 mm syringe filter</td>
			<td style="width:243px;">Fisher</td>
			<td style="width:119px;">SLHA 033S S</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:216px;">10X EMEM</td>
			<td style="width:243px;">Fisher</td>
			<td style="width:119px;">BW12-684F</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:216px;">Fetal Bovine Serum</td>
			<td style="width:243px;">ATCC</td>
			<td>30-2020</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:216px;">L-glutamine</td>
			<td style="width:243px;">Fisher</td>
			<td style="width:119px;">BP379-100</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:216px;">NaHCO3</td>
			<td style="width:243px;">Sigma</td>
			<td style="width:119px;">S5761</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:216px;">Penicillin/Streptomycin</td>
			<td style="width:243px;">ATCC</td>
			<td style="width:119px;">30-2300</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;">0.22 mm vacuum filter unit</td>
			<td style="width:243px;">Fisher</td>
			<td style="width:119px;">09-740-28C</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:216px;">HEK293</td>
			<td style="width:243px;">ATCC</td>
			<td style="width:119px;">CRL-1573</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:216px;">HEPG2</td>
			<td style="width:243px;">ATCC</td>
			<td style="width:119px;">HB-8065</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:216px;">Trypsin</td>
			<td style="width:243px;">Sigma</td>
			<td style="width:119px;">SV3003101</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:216px;">MTT</td>
			<td style="width:243px;">Sigma</td>
			<td style="width:119px;">M2128</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:216px;">D-penicillamine</td>
			<td style="width:243px;">Fisher</td>
			<td style="width:119px;">ICN15180680</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:216px;">96-well plates</td>
			<td style="width:243px;">Fisher</td>
			<td style="width:119px;">07-200-92</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:216px;">DMSO</td>
			<td style="width:243px;">Fisher</td>
			<td style="width:119px;">D12814</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:216px;">Spectra Max 190</td>
			<td style="width:243px;">Molecular Devices</td>
			<td style="width:119px;"></td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:216px;">Visual MINTEQ version 3.0</td>
			<td style="width:243px;">KTH Royal Institute of Technology</td>
			<td></td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:216px;">ICP-MS&#160;</td>
			<td style="width:243px;">Agilent</td>
			<td style="width:119px;"></td>
			<td>Details of instruments, models and detection limits were published in Reddy et al., 2013.&#160;</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:216px;">IC DIONEX DX 500</td>
			<td style="width:243px;">Dionex</td>
			<td style="width:119px;"></td>
			<td>Details of instruments, models and detection limits were published in Reddy et al., 2013.&#160;</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:216px;">VWR Incubator</td>
			<td style="width:243px;">VWR</td>
			<td style="width:119px;"></td>
			<td></td>
		</tr>
	</tbody>
</table>

removal of trace elements by cupric oxide nanoparticles from uranium in situ recovery bleed water and its effect on cell viability

באתר ההתאוששות (ISR) הוא השיטה העיקרית להפקת אורניום בארצות הברית. במהלך ISR, אורניום דלף מגוף עפרות וחולץ באמצעות חילוף יונים. המים לדמם ייצור כתוצאה (PBW) מכילים מזהמים כגון ארסן ומתכות כבדות אחרות. דוגמאות של PBW ממתקן אורניום ISR פעיל טופלו בחלקיקי תחמוצת Cupric (CuO-NPS). טיפול CuO-NP של מזהמי עדיפות PBW מופחתים, כוללים ארסן, סלניום, אורניום, ונדיום. assay שלא טופל וCuO-NP טופל PBW שימש כמרכיב הנוזלי של תקשורת צמיחת תאים ושינויים בכדאיות נקבעו על ידי MTT (3 (4,5-dimethylthiazol-2-י.ל.) ברומיד -2,5-diphenyltetrazolium) בכליות עובריות אנושיות (HEK 293) וקרצינומה של אדם hepatocellular (G2 הפ) תאים. טיפול CuO-NP היה קשור עם HEK השתפר וכדאיויות תא HEP. מגבלות של שיטה זו כוללות דילול של PBW ידי רכיבי תקשורת צמיחה ובמהלך osmolהתאמת ality כמו גם התאמת pH הכרחית. שיטה זו היא מוגבלת בהקשר הרחב יותר שלה בשל השפעות דילול ושינויים ב- pH של PBW שהוא באופן מסורתי חומצי מעט עם זאת; יש בשיטה זו יכולה שימוש רחב יותר הערכת טיפול CuO-NP במים ניטראליים יותר.

ריכוזי PBW רכיב ו- pH בPBW מטופל ומטופל-CuO-NP מדווחים בטבלה 1. מרטינסון וReddy (2009), דיווחו כי נקודת אפס אחראי CuO-NP מוערכת ב 9.4 ± 0.4. בהתחשב בכך שה- pH של PBW היה 7.2-7.4, בתנאים אלה, מים תורם פרוטונים לCuO-NPS, גורמים למשטח ננו-חלקיקי שמטען חשמלי חיובי המאפשר לספיחה של מינים טעונים ש?...

Watch this Scientific Journal Video about Removal of Trace Elements by Cupric Oxide Nanoparticles from Uranium In Situ Recovery Bleed Water and Its Effect on Cell Viability at JoVE.com

Removal of Trace Elements by Cupric Oxide Nanoparticles from Uranium In Situ Recovery Bleed Water and Its Effect on Cell Viability

Production bleed water (PBW) was treated with cupric oxide nanoparticles (CuO-NPs) and cellular toxicity was assessed in cultured human cells. The goal of this protocol was to integrate the native environmental sample into a cell culture format assessing the changes in toxicity due to CuO-NP treatment.

הסרת יסודות קורט ידי Cupric תחמוצת חלקיקים מאורניום<em&gt; באתר</em&gt; שחזור Bleed מים והשפעתה על כדאיויות תא

In situ recovery (ISR) is the predominant method of uranium extraction in the United States. During ISR, uranium is leached from an ore body and extracted ...

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JoVE Journal

Environment

Removal of Trace Elements by Cupric Oxide Nanoparticles from Uranium In Situ Recovery Bleed Water and Its Effect on Cell Viability

9.7K Views.  University of New Mexico. Production bleed water (PBW) was treated with cupric oxide nanoparticles (CuO-NPs) and cellular toxicity was assessed in cultured human cells. The goal of this protocol was to integrate the native environmental sample into a cell culture format assessing the changes in toxicity due to CuO-NP treatment.

Video: Removal of Trace Elements by Cupric Oxide Nanoparticles from Uranium In Situ Recovery Bleed Water and Its Effect on Cell Viability

Laboratory Estimation of Net Trophic Transfer Efficiencies of PCB Congeners to Lake Trout (Salvelinus namaycush) from Its Prey

A technique for laboratory estimation of net trophic transfer efficiency (&#947;) of polychlorinated biphenyl (PCB) congeners to piscivorous fish from their prey is described herein. During a 135-day laboratory experiment, we fed bloater (Coregonus hoyi) that had been caught in Lake Michigan to lake trout (Salvelinus namaycush) kept in eight laboratory tanks. Bloater is a natural prey for lake trout. In four of the tanks, a relatively high flow rate was used to ensure relatively high activity by the lake trout, whereas a low flow rate was used in the other four tanks, allowing for low lake trout activity. On a tank-by-tank basis, the amount of food eaten by the lake trout on each day of the experiment was recorded. Each lake trout was weighed at the start and end of the experiment. Four to nine lake trout from each of the eight tanks were sacrificed at the start of the experiment, and all 10 lake trout remaining in each of the tanks were euthanized at the end of the experiment. We determined concentrations of 75 PCB congeners in the lake trout at the start of the experiment, in the lake trout at the end of the experiment, and in bloaters fed to the lake trout during the experiment. Based on these measurements, &#947; was calculated for each of 75 PCB congeners in each of the eight tanks. Mean &#947; was calculated for each of the 75 PCB congeners for both active and inactive lake trout. Because the experiment was replicated in eight tanks, the standard error about mean &#947; could be estimated. Results from this type of experiment are useful in risk assessment models to predict future risk to humans and wildlife eating contaminated fish under various scenarios of environmental contamination.

Laboratory Estimation of Net Trophic Transfer Efficiencies of PCB Congeners to Lake Trout Salvelinus namaycush from Its Prey

A technique for laboratory estimation of net trophic transfer efficiency of polychlorinated biphenyl (PCB) congeners to piscivorous fish from their prey is presented. To maximize applicability of the laboratory results to the field, the piscivorous fish should be fed prey fish that are typically eaten in the field.

הערכת מעבדה של יעילות העברה הנקי התזונתית של קרוב בPCB לאגם פורל (<em&gt; Salvelinus namaycush</em&gt;) מטרפו

A technique for laboratory estimation of net trophic transfer efficiency (&#947;) of polychlorinated biphenyl (PCB) congeners to piscivorous fish from ...

Laboratory-determined Phosphorus Flux from Lake Sediments as a Measure of Internal Phosphorus Loading

Eutrophication is a water quality issue in lakes worldwide, and there is a critical need to identify and control nutrient sources. Internal phosphorus (P) loading from lake sediments can account for a substantial portion of the total P load in eutrophic, and some mesotrophic, lakes. Laboratory determination of P release rates from sediment cores is one approach for determining the role of internal P loading and guiding management decisions. Two principal alternatives to experimental determination of sediment P release exist for estimating internal load: in situ measurements of changes in hypolimnetic P over time and P mass balance. The experimental approach using laboratory-based sediment incubations to quantify internal P load is a direct method, making it a valuable tool for lake management and restoration.
Laboratory incubations of sediment cores can help determine the relative importance of internal vs. external P loads, as well as be used to answer a variety of lake management and research questions. We illustrate the use of sediment core incubations to assess the effectiveness of an aluminum sulfate (alum) treatment for reducing sediment P release. Other research questions that can be investigated using this approach include the effects of sediment resuspension and bioturbation on P release.
The approach also has limitations. Assumptions must be made with respect to: extrapolating results from sediment cores to the entire lake; deciding over what time periods to measure nutrient release; and addressing possible core tube artifacts. A comprehensive dissolved oxygen monitoring strategy to assess temporal and spatial redox status in the lake provides greater confidence in annual P loads estimated from sediment core incubations.

Lake eutrophication is a water quality issue worldwide, making the need to identify and control nutrient sources critical. Laboratory determination of phosphorus release rates from sediment cores is a valuable approach for determining the role of internal phosphorus loading and guiding management decisions.

נקבע מעבדה זרחן שטף מאגם המשקעים כמדד לטעינה הפנימית זרחן

Eutrophication is a water quality issue in lakes worldwide, and there is a critical need to identify and control nutrient sources. Internal phosphorus (P) ...

EPA Method 1615. Measurement of Enterovirus and Norovirus Occurrence in Water by Culture and RT-qPCR. I. Collection of Virus Samples

EPA Method 1615 was developed with a goal of providing a standard method for measuring enteroviruses and noroviruses in environmental and drinking waters. The standardized sampling component of the method concentrates viruses that may be present in water by passage of a minimum specified volume of water through an electropositive cartridge filter. The minimum specified volumes for surface and finished/ground water are 300 L and 1,500 L, respectively. A major method limitation is the tendency for the filters to clog before meeting the sample volume requirement. Studies using two different, but equivalent, cartridge filter options showed that filter clogging was a problem with 10% of the samples with one of the filter types compared to 6% with the other filter type. Clogging tends to increase with turbidity, but cannot be predicted based on turbidity measurements only. From a cost standpoint one of the filter options is preferable over the other, but the water quality and experience with the water system to be sampled should be taken into consideration in making filter selections.

EPA Method 1615 uses an electropositive filter to concentrate enteroviruses and noroviruses in environmental and drinking waters. This manuscript describes the procedure for collecting samples for Method 1615 analyses.

EPA שיטת המדידה של 1615. Enterovirus ומופע norovirus במים על ידי תרבות וRT-qPCR. I. איסוף דגימות וירוסים

EPA Method 1615 was developed with a goal of providing a standard method for measuring enteroviruses and noroviruses in environmental and drinking waters. ...

EPA Method 1615. Measurement of Enterovirus and Norovirus Occurrence in Water by Culture and RT-qPCR. Part III. Virus Detection by RT-qPCR

EPA Method 1615 measures enteroviruses and noroviruses present in environmental and drinking waters. This method was developed with the goal of having a standardized method for use in multiple analytical laboratories during monitoring period 3 of the Unregulated Contaminant Monitoring Rule. Herein we present the protocol for extraction of viral ribonucleic acid (RNA) from water sample concentrates and for quantitatively measuring enterovirus and norovirus concentrations using reverse transcription-quantitative PCR (RT-qPCR). Virus concentrations for the molecular assay are calculated in terms of genomic copies of viral RNA per liter based upon a standard curve. The method uses a number of quality controls to increase data quality and to reduce interlaboratory and intralaboratory variation. The method has been evaluated by examining virus recovery from ground and reagent grade waters seeded with poliovirus type 3 and murine norovirus as a surrogate for human noroviruses. Mean poliovirus recoveries were 20% in groundwaters and 44% in reagent grade water. Mean murine norovirus recoveries with the RT-qPCR assay were 30% in groundwaters and 4% in reagent grade water.

Here we present a procedure to quantify enterovirus and norovirus in environmental and drinking waters using reverse transcription-quantitative PCR. Mean virus recovery from groundwater with this standardized procedure from EPA Method 1615 was 20% for poliovirus and 30% for murine norovirus.

EPA שיטת המדידה של 1615. Enterovirus ומופע norovirus במים על ידי תרבות וRT-qPCR. חלק שלישי. איתור וירוסים על ידי RT-qPCR

EPA Method 1615 measures enteroviruses and noroviruses present in environmental and drinking waters. This method was developed with the goal of having a ...

A CO2 Concentration Gradient Facility for Testing CO2 Enrichment and Soil Effects on Grassland Ecosystem Function

Continuing increases in atmospheric carbon dioxide concentrations (CA) mandate techniques for examining impacts on terrestrial ecosystems. Most experiments examine only two or a few levels of CA concentration and a single soil type, but if CA can be varied as a gradient from subambient to superambient concentrations on multiple soils, we can discern whether past ecosystem responses may continue linearly in the future and whether responses may vary across the landscape. The Lysimeter Carbon Dioxide Gradient Facility applies a 250 to 500 &#181;l L-1 CA gradient to Blackland prairie plant communities established on lysimeters containing clay, silty clay, and sandy soils. The gradient is created as photosynthesis by vegetation enclosed in in temperature-controlled chambers progressively depletes carbon dioxide from air flowing directionally through the chambers. Maintaining proper air flow rate, adequate photosynthetic capacity, and temperature control are critical to overcome the main limitations of the system, which are declining photosynthetic rates and increased water stress during summer. The facility is an economical alternative to other techniques of CA enrichment, successfully discerns the shape of ecosystem responses to subambient to superambient CA enrichment, and can be adapted to test for interactions of carbon dioxide with other greenhouse gases such as methane or ozone.

A CO2 Concentration Gradient Facility for Testing CO2 Enrichment and Soil Effects on Grassland Ecosystem Function

The Lysimeter Carbon Dioxide Gradient Facility creates a 250 to 500 &#181;l L-1 linear carbon dioxide gradient in temperature-controlled chambers housing grassland plant communities on clay, silty clay, and sandy soil monoliths. The facility is used to determine how past and future carbon dioxide levels affect grassland carbon cycling.

CO<sub&gt; 2</sub&gt; מתקן מפל ריכוזים לבדיקה CO<sub&gt; 2</sub&gt; העשרה וקרקע השפעות על תפקוד המערכת האקולוגית גראסלאנד

Continuing increases in atmospheric carbon dioxide concentrations (CA) mandate techniques for examining impacts on terrestrial ecosystems. Most ...

Determination of Inorganic Arsenic in a Wide Range of Food Matrices using Hydride Generation - Atomic Absorption Spectrometry.

The European Food Safety Authority (EFSA) underlined in its Scientific Opinion on Arsenic in Food that in order to support a sound exposure assessment to inorganic arsenic through diet, information about distribution of arsenic species in various food types must be generated. A method, previously validated in a collaborative trial, has been applied to determine inorganic arsenic in a wide variety of food matrices, covering grains, mushrooms and food of marine origin (31 samples in total). The method is based on detection by flow injection-hydride generation-atomic absorption spectrometry of the iAs selectively extracted into chloroform after digestion of the proteins with concentrated HCl. The method is characterized by a limit of quantification of 10 &#181;g/kg dry weight, which allowed quantification of inorganic arsenic in a large amount of food matrices. Information is provided about performance scores given to results obtained with this method and which were reported by different laboratories in several proficiency tests. The percentage of satisfactory results obtained with the discussed method is higher than that of the results obtained with other analytical approaches.

The usefulness of an analytical method to determine inorganic arsenic in a wide range of food matrices is demonstrated. The method consists of selective extraction of inorganic arsenic into chloroform with a final determination by hydride generation-atomic absorption spectrometry.

קביעת אי-אורגנית ארסן ב רחב טווח של מזון מטריצות באמצעות הידריד דור - ספקטרומטר בליעה אטומית.

The European Food Safety Authority (EFSA) underlined in its Scientific Opinion on Arsenic in Food that in order to support a sound exposure assessment to ...

Experimental Column Setup for Studying Anaerobic Biogeochemical Interactions Between Iron (Oxy)Hydroxides, Trace Elements, and Bacteria

Fate and speciation of trace elements (TEs), such as arsenic (As) and mercury (Hg), in aquifers are closely related to physio-chemical conditions, such as redox potential (Eh) and pH, but also to microbial activities that can play a direct or indirect role on speciation and/or mobility. Indeed, some bacteria can directly oxidize As(III) to As(V) or reduce As(V) to As(III). Likewise, bacteria are strongly involved in Hg cycling, either through its methylation, forming the neurotoxin monomethyl mercury, or through its reduction to elemental Hg&#176;. The fates of both As and Hg are also strongly linked to soil or aquifer composition; indeed, As and Hg can bind to organic compounds or (oxy)hydroxides, which will influence their mobility. In turn, bacterial activities such as iron (oxy)hydroxide reduction or organic matter mineralization can indirectly influence As and Hg sequestration. The presence of sulfate/sulfide can also strongly impact these particular elements through the formation of complexes such as thio-arsenates with As or metacinnabar with Hg.
Consequently, many important questions have been raised on the fate and speciation of As and Hg in the environment and how to limit their toxicity. However, due to their reactivity towards aquifer components, it is difficult to clearly dissociate the biogeochemical processes that occur and their different impacts on the fate of these TE.
To do so, we developed an original, experimental, column setup that mimics an aquifer with As- or Hg-iron-oxide rich areas versus iron depleted areas, enabling a better understanding of TE biogeochemistry in anoxic conditions. The following protocol gives step by step instructions for the column set-up either for As or Hg, as well as an example with As under iron and sulfate reducing conditions.

Experimental Column Setup for Studying Anaerobic Biogeochemical Interactions Between Iron OxyHydroxides, Trace Elements, and Bacteria

Fate and speciation of arsenic and mercury in aquifers are closely related to physio-chemical conditions and microbial activity. Here, we present an original experimental column setup that mimics an aquifer and enables a better understanding of trace element biogeochemistry in anoxic conditions. Two examples are presented, combining geochemical and microbiological approaches.

להגדרת הטור ניסיוני ללמוד אנאירובית Biogeochemical אינטראקציות בין והידרוקסידים ברזל (אוקסי), יסודות קורט, חיידקים

Fate and speciation of trace elements (TEs), such as arsenic (As) and mercury (Hg), in aquifers are closely related to physio-chemical conditions, such as ...

Assessment of Methane and Nitrous Oxide Fluxes from Paddy Field by Means of Static Closed Chambers Maintaining Plants Within Headspace

This protocol describes the measurement of greenhouse gas (GHG) emissions from paddy soils using the static closed chamber technique. This method is based on the diffusion theory. A known volume of air overlaying a defined soil area is enclosed within a parallelepiped cover (named &#34;chamber&#34;), for a defined period of time. During this enclosure period, gases (methane (CH4) and nitrous oxide (N2O)) move from soil pore air near their microbial source (i.e., methanogens, nitrifiers, denitrifiers) to the chamber headspace, following a natural concentration gradient. Fluxes are then estimated from chamber headspace concentration variations sampled at regular intervals throughout the enclosure and then analyzed with gas chromatography. Among the techniques available for GHG measurement, the static closed chamber method is suitable for plot experiments, as it does not require large homogenously treated soil areas. Furthermore, it is manageable with limited resources and can identify relationships among ecosystem properties, processes, and fluxes, especially when combined with GHG driving force measurements. Nevertheless, with respect to the micrometeorological method, it causes a minimal but still unavoidable soil disturbance, and allows a minor temporal resolution. Several phases are key to the method implementation: i) chamber design and deployment, ii) sample handling and analyses, and iii) flux estimation. Technique implementation success in paddy fields demands adjustments for field flooding during much of the cropping cycle, and for rice plant maintenance within the chamber headspace during measurements. Therefore, the additional elements to be considered with respect to the usual application of non-flooded agricultural soils consist of devices for: i) avoiding any unintended water disturbance that could overestimate fluxes, and ii) including rice plants within the chamber headspace to fully consider gases emitted through aerenchyma transportation.

The overall goal of this protocol is to measure greenhouse gas emissions from paddy fields using the static closed chamber technique. The measurement system needs specific adjustments due to the presence of both a permanent water layer in the field and of the plants within the chamber headspace.

הערכה של מתאן והנתיבים תחמוצת החנקן משדה אורז באמצעות חשמל סטטי סגור צ'יימברס שמירה על הצמחים בתוך קראוון

This protocol describes the measurement of greenhouse gas (GHG) emissions from paddy soils using the static closed chamber technique. This method is based ...

Bioindication Testing of Stream Environment Suitability for Young Freshwater Pearl Mussels Using In Situ Exposure Methods

Knowledge of habitat suitability for freshwater mussels is an important step in the conservation of this endangered species group. We describe a protocol for performing in situ juvenile exposure tests within oligotrophic river catchments over one-month and three-month periods. Two methods (in both modifications) are presented to evaluate the juvenile growth and survival rate. The methods and modifications differ in value for the locality bioindication and each has its benefits as well as limitations. The sandy cage method works with a large set of individuals, but only some of the individuals are measured and the results are evaluated in bulk. In the mesh cage method, the individuals are kept and measured separately, but a low individual number is evaluated. The open water exposure modification is relatively easy to apply; it shows the juvenile growth potential of sites and can also be effective for water toxicity testing. The within-bed exposure modification needs a high workload but is closer to the conditions of a natural juvenile environment and it is better for reporting the real suitability of localities. On the other hand, more replications are needed in this modification due to its high-hyporheic environment variability.

Bioindication Testing of Stream Environment Suitability for Young Freshwater Pearl Mussels Using In Situ Exposure Methods

In situ bioindications enable determination of the suitability of an environment for endangered mussel species. We describe two methods based on the juvenile exposure of freshwater pearl mussels in cages to oligotrophic river habitats. Both methods are implemented in variants for open water and hyporheic water environments.

Bioindication בדיקות של התאמת הסביבה זרם עבור צעירים מים מתוקים פנינה מולים בשיטות בחשיפה באתרו

Knowledge of habitat suitability for freshwater mussels is an important step in the conservation of this endangered species group. We describe a protocol ...

Assessing the Particulate Matter Removal Abilities of Tree Leaves

Based on the conventional cleaning methods (water cleaning (WC) + brush cleaning (BC)), this study evaluated the influence of ultrasonic cleaning (UC) on collecting various sized particulate matter (PM) retained on leaf surfaces. We further characterized the retention efficiency of leaves to various sized PM, which will help to assess the abilities of urban trees to remove PM from ambient air quantitatively. 
Taking three broadleaf tree species (Ginkgo biloba, Sophora japonica, and Salix babylonica) and two needleleaf tree species (Pinus tabuliformis and Sabina chinensis) as the research objects, leaf samples were collected 4 days (short PM retention period) and 14 days (long PM retention period) after the latest rainfall. PM retained on the leaf surfaces was collected by means of WC, BC, and UC in sequence. Then, retention efficiencies of leaves (AEleaf) to three types of the various sized PM, including easily removable PM (ERP), difficult-to-remove PM (DRP), and totally removable PM (TRP), were calculated. Only around 23%-45% of the total PM retained on leaves could be cleaned off and collected by WC. When the leaves were cleaned through WC+BC, the underestimation of the PM retention capacity of different tree species was in the range of 29%-46% for various sized PM. Almost all PM retained on leaves could be removed if UC was supplemented to WC+BC. 
In conclusion, if the UC was complemented after the conventional cleaning methods, more PM on leaf surfaces could be eluted and collected. The procedure developed in this study can be used for assessing the PM removal abilities of different tree species.

The ultrasonic cleaning method was applied to elute the particulate matter (PM) retained on leaf surfaces after PM was eluted by the conventional cleaning methods (water cleaning only or water cleaning plus brush cleaning). The methodology can help to improve the estimation accuracy for PM retention capacity of leaves.

הערכת היכולות הסרת חלקיקים של העץ עלים

Based on the conventional cleaning methods (water cleaning (WC) + brush cleaning (BC)), this study evaluated the influence of ultrasonic cleaning (UC) on ...