电絮凝法处理五价锑废水机制研究
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- 英文论文题名：Mechanism of Antimony(Ⅴ) Removal Using Iron Electrocoagulation
- 论文作者：曹迪 ; 赵旭
- 英文论文作者：Di Cao ; Xu Zhao ; State Key Laboratory of Environmental Aquatic Chemistry ; Research Center for Eco-Environmental Sciences ; Chinese Academy of Sciences
- 年：2016
- 作者机构：中国科学院生态环境研究中心环境水质学国家重点实验室;
- 论文关键词：锑污染 ; 五价锑 ; 铁电絮凝 ; 产物分析
- 会议召开时间：2016-07-01
- 会议录名称：中国化学会第30届学术年会摘要集-第二十六分会：环境化学
- 语种：中文
- 分类号：X75
- 学会代码：ZGHY
- 会议名称：中国化学会第30届学术年会-第二十六分会 ; 环境化学
- 会议地点：中国辽宁大连
- 主办单位：中国化学会
- 学会名称：中国化学会
- 页数：1
- 文件大小：179k
- 原文格式：D
- 会议级别：全国
摘要
在锑矿的开采和冶炼过程中,会产生大量含锑废水。锑元素对于生物体具有毒性和致癌性,世界卫生组织规定饮用水中的锑浓度应低于5?g/L[1]。锑在水体中主要具有五价和三价两种存在形式,其中五价锑利用常规方法较难去除[2]。本研究针对较难去除的五价锑废水,采用铁电絮凝技术,利用铁板作为牺牲阳极,并研究了pH,电流密度,好氧/厌氧条件等对于锑去除的影响。研究结果表明,厌氧条件下,电絮凝对于五价锑具有较高的去除效率,弱酸性-中性的pH范围及适中的电流密度更有利于水体中五价锑的去除。对于絮体X射线衍射及拉曼分析表明,厌氧条件下,会产生二价铁-三家铁夹层水和氢氧化物(绿锈),从而产生沉淀性能更好,吸附能力更强的絮体,进而强化铁电絮凝对于五价锑的去除效果。本研究为利用电絮凝技术处理某些难于采用常规技术处理达标排放的废水奠定了一定理论基础。
Antimony(Sb) is a toxic element and has caused increasing concern worldwide.The main source of Sb pollution comes from Sb mining and refining.Verious studies indicated that Sb(V) is more difficult to be removed in EC process.In this research,we studied Sb(V) removal using iron E.Results showed that Sb(V) can be removed efficiently under anoxic conditions with the optimum pH ranging from 4-7 and current density ranging from 3-10 m A/cm2.This study provides some theoretical bases and new insights into the treatment of Sb contaminated wastewater and other stubborn wastewaters.
Antimony(Sb) is a toxic element and has caused increasing concern worldwide.The main source of Sb pollution comes from Sb mining and refining.Verious studies indicated that Sb(V) is more difficult to be removed in EC process.In this research,we studied Sb(V) removal using iron E.Results showed that Sb(V) can be removed efficiently under anoxic conditions with the optimum pH ranging from 4-7 and current density ranging from 3-10 m A/cm2.This study provides some theoretical bases and new insights into the treatment of Sb contaminated wastewater and other stubborn wastewaters.
引文
[1]WHO,Guidelines for drinking-water quality.2011.p.564.
[2]Guo,X.,Z.Wu,and M.He,Removal of antimony(V)and antimony(III)from drinking water by coagulation-flocculation-sedimentation(CFS).Water Research,2009.43(17):p.4327-4335.
[2]Guo,X.,Z.Wu,and M.He,Removal of antimony(V)and antimony(III)from drinking water by coagulation-flocculation-sedimentation(CFS).Water Research,2009.43(17):p.4327-4335.