Preparation of polymer-supported hydrated ferric oxide based on Donnan membrane effect and its application for arsenic removal |
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| Authors: | QingJian Zhang BingCai Pan XinQing Chen WeiMing Zhang BingJun Pan QuanXing Zhang L Lv X S Zhao |
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| Institution: | (1) State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210093, China;(2) Department of Chemical and Biomolecular Engineering, National University of Singapore, 10 Kent Ridge, Singapore, 119260, Singapore |
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| Abstract: | In the present study a novel technique was proposed to prepare a polymer-supported hydrated ferric oxide (D201-HFO) based
on Donnan membrane effect by using a strongly basic anion exchanger D201 as the host material and FeCl3-HCl-NaCl solution as the reaction environment. D201-HFO was found to exhibit higher capacity for arsenic removal than a commercial
sorbent Purolite ArsenX. Furthermore, it presents favorable adsorption selectivity for arsenic removal from aqueous solution,
as well as satisfactory kinetics. Fixed-bed column experiments showed that arsenic sorption on D201-HFO could result in concentration
of this toxic metalloid element below 10 μg/L, which was the new maximum concentration limit set recently by the European
Commission and imposed by the US EPA and China. Also, the spent D201-HFO is amenable to efficient regeneration by NaOH-NaCl
solution.
Partially supported by the National Natural Science Foundation of China (Grant No. 20504012), the Natural Science Foundation
of Jiangsu Province (Grant No. BK2006129) and the Scientific Research Foundation of Graduate School of Nanjing University
(Grant No. 2006CL11) |
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| Keywords: | hydrated ferrous oxide anion exchanger Donnan membrane effect arsenic sorption |
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