Sorption of atrazine onto humic acids (HAs) coated nanoparticles
文献类型：会议论文
| 作者 | Lu, Jiajuan; Li, Ying; Yan, Xiaomin; Shi, Baoyou; Wang, Dongsheng; Tang, Hongxiao |
| 出版日期 | 2009 |
| 会议名称 | 5th International Conference on Interfaces Against Pollution |
| 会议日期 | JUN 01-04, 2008 |
| 会议地点 | Kyoto, JAPAN |
| 关键词 | Sorption Atrazine (AT) Humic acid (HA) Nano-SiO(2) Kaolinite |
| 英文摘要 | With the development of nanotechnologies, a large number of nano-materials with novel properties are being released into the environment. However, little is known about their fate, transport, toxicity and interactions with organic matters in aqueous environment. In this study, nano-SiO(2) or kaolinite, coated with soil humic acid (SHA) and peat humic acid (PHA), were used as sorbents. The original and HA-coated nanoparticles were characterized for particle size, TEM and electrophoretic mobility. Sequential ultrafiltration (UF) was used to characterize the molecular size fractionations of dissolved HAs. Sorption data of atrazine (AT) under various solution concentration, ionic strength and pH were well fitted with Freundlich model. Sorption amount of AT on HA-coated nanoparticles was significantly lower than that on original particles. The sorption maximum appeared at I=0.001 mol/l (NaNO(3)), pH 3. Size of nanoparticle aggregates, conformation of HA and specific surface area were factors affecting the sorption process. The compressed conformation of HA was more favorable for HA sorption than expanded one. Size of aggregation was not a determinant factor for the sorption process, while the specific surface areas of nano-sorbent was an important one. Results indicated that HA plays an important role in the transport and toxicity of nanoparticles and AT in aqueous environment. (C) 2008 Elsevier B.V. All rights reserved. |
| ISSN号 | 0927-7757 |
| WOS记录号 | WOS:000270164800015 |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/24677]  |
| 专题 | 生态环境研究中心_环境水质学国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Lu, Jiajuan,Li, Ying,Yan, Xiaomin,et al. Sorption of atrazine onto humic acids (HAs) coated nanoparticles[C]. 见:5th International Conference on Interfaces Against Pollution. Kyoto, JAPAN. JUN 01-04, 2008. |
入库方式： OAI收割
来源：生态环境研究中心
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