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Nano zero-valent iron supported by macroporous styrene ion exchange resin for enhanced Cr(VI) removal from aqueous solution
Journal of Dispersion Science and Technology ( IF 2.2 ) Pub Date : 2020-11-24 , DOI: 10.1080/01932691.2020.1848583
Wei Gao 1 , Dengjie Zhong 1 , Yunlan Xu 1 , Han Luo 2 , Sijing Zeng 1
Affiliation  

Abstract

In view of problem that nanoscale zero-valent (nZVI) is easy to agglomerate and deactivate in the process of wastewater treatment, a styrene-based ion exchange resin D201 is selected as the carrier to load it. D201-loaded nZVI (D201@nZVI) was applied to treat simulated Cr(VI) wastewater. Receiving the effect and influence of electrostatic attraction, Cr(VI) will attach to D201@nZVI, partly reduced to Cr(III) by nZVI to form CrxFe1−x(OH)3 co-precipitation. D201@nZVI shows good treatment capacity of a wide pH range, and excellent regeneration performance. The removal rate and maximum adsorption amounts of 50 mg L−1 Cr(VI) reached 100% and 123.14 mg g−1, respectively. D201@nZVI has promising potential to be applied in situ groundwater remediation.



中文翻译:

大孔苯乙烯离子交换树脂负载纳米零价铁增强水溶液中 Cr(VI) 的去除

摘要

针对废水处理过程中纳米级零价(nZVI)易团聚和失活的问题,选用苯乙烯系离子交换树脂D201作为载体对其进行负载。负载 D201 的 nZVI (D201@nZVI) 用于处理模拟 Cr(VI) 废水。受到静电引力的作用和影响,Cr(VI)会附着在D201@nZVI上,部分被nZVI还原为Cr(III),形成Cr x Fe 1− x (OH) 3共沉淀。D201@nZVI在很宽的pH范围内表现出良好的处理能力,以及优异的再生性能。50 mg L -1 Cr(VI)的去除率和最大吸附量达到100%和123.14 mg g -1, 分别。D201@nZVI 具有良好的地下水原位修复潜力。

更新日期:2020-11-24
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