Adsorption and desorption of 2,4,6-trichlorophenol onto and from ash as affected by Ag+, Zn2+, and Al3+
文献类型：期刊论文
| 作者 | Chen, Guangcai ; Wang, Yusheng ; Pei, Zhiguo |
| 刊名 | ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
 |
| 出版日期 | 2014 |
| 卷号 | 21期号:3页码:2002-2008 |
| 关键词 | Adsorption 2 Ash 4 6-Trichlorophenol Ag+ Zn2+ Al3+ |
| ISSN号 | 0944-1344 |
| 中文摘要 | Metal cations and organic pollutants mostly co-exist in the natural environment. However, their interactions in adsorption processes have yet to be adequately addressed. In the current study, the effect of inorganic cations with different charges (Ag+, Zn2+, and Al3+) on the adsorption and desorption of 2,4,6-trichlorophenol (TCP) onto and from processed ash derived from wheat (Triticum aestivum L.) straw was investigated. The adsorption and desorption of TCP were both nonlinear; the isotherm and kinetics curves fitted well using the Freundlich equation and a pseudo-second-order model, respectively. The presence of Ag+ promoted TCP adsorption, while Zn2+ and Al3+ reduced TCP adsorption onto ash. The desorption of TCP from ash showed obvious hysteresis, and the presence of Ag+, Zn2+, and Al3+ caused the desorption to be less hysteretic. The suppression of TCP adsorption by Zn2+ and Al3+ was ascribed to the partial overlapping of adsorption groups between TCP and metal ions. Al3+ had a stronger inhibition effect than that of Zn2+ due to its higher binding capacity and larger hydrated ionic radius than those of Zn2+. Enhanced adsorption of TCP onto ash by Ag+ was ascribed to its ability to reduce the competitive adsorption of water molecules on ash surface by replacing the original ions, such as Na+ and Ca2+, and compressing the hydrated ionic radius of these metal ions. In addition, Ag+ was able to bind with the aromatic organic compounds containing pi-electrons, which resulted in a further increase of TCP adsorption by ash. |
| WOS记录号 | WOS:000330970400037 |
| 公开日期 | 2015-03-24 |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/9311]  |
| 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, Guangcai,Wang, Yusheng,Pei, Zhiguo. Adsorption and desorption of 2,4,6-trichlorophenol onto and from ash as affected by Ag+, Zn2+, and Al3+[J]. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH,2014,21(3):2002-2008. |
| APA | Chen, Guangcai,Wang, Yusheng,&Pei, Zhiguo.(2014).Adsorption and desorption of 2,4,6-trichlorophenol onto and from ash as affected by Ag+, Zn2+, and Al3+.ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH,21(3),2002-2008. |
| MLA | Chen, Guangcai,et al."Adsorption and desorption of 2,4,6-trichlorophenol onto and from ash as affected by Ag+, Zn2+, and Al3+".ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH 21.3(2014):2002-2008. |
入库方式： OAI收割
来源：生态环境研究中心
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