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DOI | 10.1016/j.jhazmat.2014.04.058 |
Transport and retention of zinc oxide nanoparticles in porous media: Effects of natural organic matter versus natural organic ligands at circumneutral pH | |
Jones, Edward H.; Su, Chunming | |
发表日期 | 2014-06-30 |
ISSN | 0304-3894 |
卷号 | 275页码:79-88 |
英文摘要 | The potential toxicity of nanoparticles (NPs) has received considerable attention, but there is little knowledge relating to the fate and transport of engineered ZnO NPs in the environment. Column experiments were performed at pH 7.3-7.6 to generate effluent concentrations and retention profiles for assessing the fate and transport of ZnO NPs (PZC = 9.3, nominal size 20 nm) in saturated quartz sands (256 mu m) in the presence of low natural organic matter (NOM) concentrations (1 mg/L humic and fulvic acids) and millimolar natural organic ligands (NOL) levels (formic, oxalic, and citric acids). At circumneutral pHs, ZnO NPs were positively charged and immobile in sand. The presence of NOM decreased the attachment efficiency facilitating ZnO transport through sand columns. Conversely, ZnO transport in the presence of formic and oxalic acids was only slightly improved when compared to ZnO in DI water; whereas, citric acid showed no improvement. The distinct difference between NOM and NOL may have important implications with regard to ZnO transport in the subsurface environment. Experimental results suggested the presence of both favorable and unfavorable nanoparticle interactions causes significant deviations from classical colloid filtration theory (CFT). (C) 2014 Elsevier B.V. All rights reserved. |
英文关键词 | Nanoparticles;Zinc oxide;Natural organic matter;Natural organic ligands;Fate and transport |
语种 | 英语 |
WOS记录号 | WOS:000339146700010 |
来源期刊 | JOURNAL OF HAZARDOUS MATERIALS |
来源机构 | 美国环保署 |
文献类型 | 期刊论文 |
条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/57140 |
作者单位 | US EPA, Ground Water & Ecosyst Restorat Div, Natl Risk Management Res Lab, Off Res & Dev, Ada, OK 74820 USA |
推荐引用方式 GB/T 7714 | Jones, Edward H.,Su, Chunming. Transport and retention of zinc oxide nanoparticles in porous media: Effects of natural organic matter versus natural organic ligands at circumneutral pH[J]. 美国环保署,2014,275:79-88. |
APA | Jones, Edward H.,&Su, Chunming.(2014).Transport and retention of zinc oxide nanoparticles in porous media: Effects of natural organic matter versus natural organic ligands at circumneutral pH.JOURNAL OF HAZARDOUS MATERIALS,275,79-88. |
MLA | Jones, Edward H.,et al."Transport and retention of zinc oxide nanoparticles in porous media: Effects of natural organic matter versus natural organic ligands at circumneutral pH".JOURNAL OF HAZARDOUS MATERIALS 275(2014):79-88. |
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