铁碳微电解高效处理含二甲砷酸垃圾渗滤液废水  

Iron-Carbon Micro-Electrolysis Treatment for Efficient Removal of Dimethylarsinic Acid in Leachate Wastewater

作　　者：张术宝 柴晓利[3] 吴瑞芹 ZHANG Shubao;CHAI Xiaoli;WU Ruiqin(Beijing Xindu Enterprise Management Co.,Ltd.,Beijing 101199,China;China Water Environment Group Co.,Ltd.,Beijing 101149,China;College of Environmental Science and Engineering,Tongji University,Shanghai 200092,China)

机构地区：[1]北京信都企业管理有限公司,北京101199 [2]中国水环境集团有限公司,北京101149 [3]同济大学环境科学与工程学院,上海200092

出　　处：《净水技术》2023年第8期131-135,189,共6页Water Purification Technology

基　　金：国家自然科学基金(52270163)。

摘　　要：甲基砷化合物对人类健康有严重危害,传统处理技术对其处理效率低。文章以二甲砷酸(DMA)废水为研究对象,构建了由零价铁(Fe0)和粉末活性炭(PAC)组成的铁碳微电解系统。含有10 g/L Fe0和1 g/L PAC的铁碳微电解系统在30 min内、初始pH值为2时,对含有1500μg/L DMA的模拟废水去除率达95%左右。通过研究不同pH下铁碳微电解系统对DMA的去除效果,证明了Fe0表面发生的电子转移在DMA的去除机理中有重要作用。采用所构建的铁碳微电解系统处理某垃圾填埋场含有多种砷化合物的渗滤液废水,结果表明在pH值为5时,总砷的去除率可达70%~85%。综上,铁碳微电解系统可有效处理含甲基砷酸的废水。Methylated arsenic species are of serious concern because of their marked negative impacts to human health and low treatment effect of conventional treatment technologies.In this study,an iron-carbon micro-electrolysis system consisting of zero-valent iron(Fe0)and powdered activated carbon(PAC)was constructed to study treatment of dimethylarsenic acid(DMA)wastewater.The iron-carbon microelectrolysis system containing 10 g/L Fe0 and 1 g/L PAC achieved about 95%removal for the simulated DMA wastewater with an initial DMA concentration of 1500μg/L within 30 min at pH value of 2.By investigating the effect of pH on the DMA removal in the iron-carbon microelectrolysis system,it demonstrated that the electron transfer occurring on the surface of the Fe0 played an important role in the removal mechanism of DMA.The constructed iron-carbon micro-electrolysis system was used to treat landfill leachate wastewater containing various arsenic compounds,and the results showed that the removal of total arsenic could reach 70%~85%at pH value of 5.In sum,the iron-carbon microelectrolysis system can effectively treat wastewater containing methylated arsenic species.

关 键 词：二甲砷酸 铁碳微电解 活性炭 零价铁 垃圾渗滤液 

分 类 号：X703[环境科学与工程—环境工程]