Effects of Copper, Lead, and Cadmium on the Sorption and Desorption of Atrazine onto and from Carbon Nanotubes
文献类型：期刊论文
| 作者 | Chen, Guang-Cai ; Shan, Xiao-Quan ; Wang, Yu-Sheng ; Pei, Zhi-Guo ; Shen, Xiu-E ; Wen, Bei ; Owens, Gary |
| 刊名 | ENVIRONMENTAL SCIENCE & TECHNOLOGY
 |
| 出版日期 | 2008-11-15 |
| 卷号 | 42期号:22页码:8297-8302 |
| 英文摘要 | There are currently few studies on the dual effects of metal ions on the sorption of atrazine and conversely of atrazine on metal adsorption on multiwalled carbon nanotubes (MWCNTs). While a number of sorption models were considered to describe the sorption of atrazine on MWCNTs, the Polanyi-Manes model (PMM) fit the sorption isotherms well with the lowest mean weighted square errors. Atrazine was mainly adsorbed onto the surface and micropores of MWCNTs bundles or aggregates. Hydrogen bonding between azo and amino nitrogen of atrazine and functional groups on MWCNTs also occurred. Oxygenated functionalities, mainly carboxylic groups on MWCNTs surface, decreased the sorption of atrazine. Metal cations Cu(2+), Pb(2+), and Cd(2+) diminished the sorption of atrazine depending on the oxygenated functionalities densities. The mechanisms ascribed were due to the formation of surface or inner-sphere complexes Of Cu(2+), Pb(2+), and Cd(2+) through carboxylic groups and hydration, which may occupy part of the surface of MWCNTs-O. The large hydration shell of metal cations may intrude or shield the hydrophobic and hydrophilic sites and indirectly compete with atrazine for surface sites, leading to the inhibition of atrazine adsorption around the metal-complexed moieties. |
| WOS记录号 | WOS:000260921400022 |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/21941]  |
| 专题 | 生态环境研究中心_环境化学与生态毒理学国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Chen, Guang-Cai,Shan, Xiao-Quan,Wang, Yu-Sheng,et al. Effects of Copper, Lead, and Cadmium on the Sorption and Desorption of Atrazine onto and from Carbon Nanotubes[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2008,42(22):8297-8302. |
| APA | Chen, Guang-Cai.,Shan, Xiao-Quan.,Wang, Yu-Sheng.,Pei, Zhi-Guo.,Shen, Xiu-E.,...&Owens, Gary.(2008).Effects of Copper, Lead, and Cadmium on the Sorption and Desorption of Atrazine onto and from Carbon Nanotubes.ENVIRONMENTAL SCIENCE & TECHNOLOGY,42(22),8297-8302. |
| MLA | Chen, Guang-Cai,et al."Effects of Copper, Lead, and Cadmium on the Sorption and Desorption of Atrazine onto and from Carbon Nanotubes".ENVIRONMENTAL SCIENCE & TECHNOLOGY 42.22(2008):8297-8302. |
入库方式： OAI收割
来源：生态环境研究中心
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