Enhanced Selectivity for Heavy Metals Using Polyaniline-Modified Hydrogel
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- 作者：Yian Zheng ; Wenbo Wang ; Gong Zhu ; Aiqin Wang
- 刊名：Industrial & Engineering Chemistry Research
- 出版年：2013
- 出版时间：April 3, 2013
- 年：2013
- 卷：52
- 期：13
- 页码：4957-4961
- 全文大小：288K
- 年卷期：v.52,no.13(April 3, 2013)
- ISSN：1520-5045
文摘
With Fenton鈥檚 reagent as the redox initiator, a granular hydrogel was prepared under ambient conditions, and then modified with polyaniline (PAN) to develop a composite adsorbent with enhanced adsorption selectivity for the heavy metals, such as the Cu鈥揘i system in this study. The results indicate that PAN-modified hydrogel shows decreasing adsorption kinetics, but with a comparable adsorption capacity for Cu(II). Moreover, the adsorption selectivity for Cu(II) exhibits an impressive improvement, with the selectivity coefficient (KCu鈥揘i) being enhanced by a factor of 6鈥? (aniline:hydrogel = 1:20) for binary Cu鈥揘i and quaternary Cu鈥揘i鈥揅r鈥揨n systems. Finally, the adsorption and desorption characteristics were evaluated during multicycle adsorption processes.