Coadsorption of Ciprofloxacin and Cu(II) on Montmorillonite and Kaolinite as Affected by Solution pH
文献类型：期刊论文
| 作者 | Pei, Zhiguo; Shan, Xiao-Quan; Kong, Jingjing; Wen, Bei; Owens, Gary |
| 刊名 | ENVIRONMENTAL SCIENCE & TECHNOLOGY
 |
| 出版日期 | 2010-02-01 |
| 卷号 | 44期号:3页码:915-920 |
| 中文摘要 | The coadsorption of ciprofloxacin (Cip) and Cu(II) on montmorillonite and kaolinite was studied between pH 4.0 and 9.5. At pH < 5.0, Cu(2+), Cip(+) and [Cu(II)(Cip(+/-))](2+) were the main species in solution. Between pH 5.0-7.0 [Cu(II)(Cip(+/-))](2+) was the dominant complex species. Above pH 8.0 [Cu(II)(Cip(-))(2)](0) precipitated. The presence of Cu(II) exerted no effect on the Cip sorption onto montmorillonite at low pH, whereas it increased Cip sorption on montmorillonite at pH > 6.0 due to the stronger affinity of Cip-Cu(II) complexes compared to sole Cip(-) or Cip(+/-), or Cip sorption via a Cu(II) bridge increased. In contrast Cip increased Cu(II) adsorption on montmorillonite at pH < 7.0, whereas it decreased the adsorption of Cu(II) on kaolinite at pH 6.0-8.0. Cip was sorbed onto the kaolinite surface via interaction of carboxyl groups over the entire pH range. At pH 4.0-4.7, Cip(+) sorption onto kaolinite's positively charged surface was more favorable than sorption of Cip-Cu(II) complexes. Batch experiments and FIR analyses indicated that the coordination between Cip(+/-), Cip(-) and Cu(II) were most likely present on kaolinite surface at pH 7.0. At pH > 8.0, Cu(OH)(2) (s) and [Cu(II)(Cip(-))(2)](0) precipitated out of solution or on the montmorillonite or kaolinite surface, which was not considered evidence for either the sorption of Cip or the adsorption of Cu(II). |
| WOS记录号 | WOS:000273950100013 |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/21056]  |
| 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 | Pei, Zhiguo,Shan, Xiao-Quan,Kong, Jingjing,et al. Coadsorption of Ciprofloxacin and Cu(II) on Montmorillonite and Kaolinite as Affected by Solution pH[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2010,44(3):915-920. |
| APA | Pei, Zhiguo,Shan, Xiao-Quan,Kong, Jingjing,Wen, Bei,&Owens, Gary.(2010).Coadsorption of Ciprofloxacin and Cu(II) on Montmorillonite and Kaolinite as Affected by Solution pH.ENVIRONMENTAL SCIENCE & TECHNOLOGY,44(3),915-920. |
| MLA | Pei, Zhiguo,et al."Coadsorption of Ciprofloxacin and Cu(II) on Montmorillonite and Kaolinite as Affected by Solution pH".ENVIRONMENTAL SCIENCE & TECHNOLOGY 44.3(2010):915-920. |
入库方式： OAI收割
来源：生态环境研究中心
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