环境工程学报2016，Vol.10Issue(10)：5648-5652,5.DOI:10.12030/j.cjee.201504130
接触辉光放电等离子体处理有机砷废水
Treatment of organoarsenic wastewater using contact glow discharge plasma
摘要
Abstract
Organoarsenic compounds,such as roxarsone (ROX),are extensively used as feed additives in the agricultural industry,and have become a serious environmental concern.This study investigated unprecedentedly the applicability of the contact glow discharge process (CGDP) for ROX oxidation and degradation in aqueous solution,and evaluated the effects of various reaction conditions on ROX conversion.The results indicated that ROX could be completely degraded,with As(Ⅴ) as the final product.The higher energy input was beneficial for a higher As(Ⅴ) production efficiency,whereas the solution pH did not seem to influence the ROX oxidation efficiency.Consequently,approximately 97％ of ROX degraded,and more than 95 μmol · L-1 As(Ⅴ) were generated within 42 min under the optimum glow discharge condition (58 W of input energy,pH 4.0).Furthermore,addition of Fe(Ⅱ) into the CGDP system significantly enhanced the ROX oxidation,due to the consumption of in-situ electrogenerated H2O2 in CGDP and the generation of additional-OH.Furthermore,the experiments of quenching active radicals indicated that · OH plays an important role in the mineralization of ROX to arsenate,and also confirmed the ROX degradation mechanism in the CGDP system.关键词
接触辉光放电等离子体/有机砷/氧化/降解/无机砷Key words
contact glow discharge plasma/organoarsenic/oxidation/degradation/As (Ⅴ)分类
资源环境引用本文复制引用
胡平,郑星,刘玉坤,郭建波,李素娟,郑经堂..接触辉光放电等离子体处理有机砷废水[J].环境工程学报,2016,10(10):5648-5652,5.基金项目
中国石油大学(华东)研究生自主创新基金资助项目(14CX06117A) （华东）
