Preparation of polymer-supported hydrated ferric oxide based on Donnan membrane effect and its application for arsenic removal

• 来源期刊: 中国科学B辑（英文版）
• 年，卷（期）: 2008,（4）
• 页码范围: 379-385
• 页数: 7页
• 语种: 英文
• DOI: 10.1007/s 11426-007-0117-6

摘要

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 satis-factory kinetics. Fixed-bed column experiments showed that arsenic sorption on D201-HFO could re-sult in concentration of this toxic metalloid element below 10 μg/L, which was the new maximum con-centration 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-NaCI solution.