预氧化-铁盐沉淀法处理高浓度含砷废水的试验研究  

Experimental Study on the Treatment of High Concentration Arsenic Wastewater by Pre-oxidation and Ferric Salt Precipitation Method

作　　者：王翔 陈三兵 周正伟 夏金雨[3] WANG Xiang;CHEN Sanbing;ZHOU Zhengwei;XIA Jinyu(Wuxi Envtec Environmental Technology Co.Ltd , Wuxi 214419 , China;School of Environmental and Safety Engineering , Changzhou University , Changzhou 213164 ,China;Suzhou Environmental Sanitation Administration Agency , Suzhou 215007 ,China)

机构地区：[1]无锡安维特环保科技有限公司,江苏无锡214419 [2]常州大学环境与安全工程学院,江苏常州213164 [3]苏州市环境卫生管理处,江苏苏州215007

出　　处：《河南化工》2021年第11期22-24,共3页Henan Chemical Industry

基　　金：苏州市2019年度科技发展计划(民生科技)项目(SS2019008)。

摘　　要：对某砷化镓半导体企业生产过程中产生的高浓度含砷(As)废水,采用过氧化氢(H_(2)O_(2))预氧化结合氯化铁(FeCl_(3))沉淀法进行处理。研究确定了H_(2)O_(2)的投加量,并考察了Fe与As物质的量比、pH值和反应时间等试验条件对砷去除效果的影响。结果表明,当30%H_(2)O_(2)用量为1.5 mL/L,Fe与As物质的量比为2.5,pH值为8.0,反应时间为2 h时,废水中的总砷浓度可从884 mg/L降低至0.164 mg/L,达到项目环评要求的0.2 mg/L的排放标准。The wastewater containing high concentration arsenic(As)produced in the production process of a gallium arsenide semiconductor enterprise is treated by hydrogen peroxide(H_(2)O_(2))pre-oxidation combined with ferric chloride(FeCl_(3))precipitation.The dosage of H_(2)O_(2) is determined,and the effects of experimental conditions such as n(Fe)/n(As),pH value and reaction time on arsenic removal are investigated.The results show that the dosage of 30%H_(2)O_(2) is 1.5 mL/L,the amount ratio of n(Fe)/n(As)is 2.5,the pH value is 8.0 and the reaction time is 2 h,the total arsenic concentration in the wastewater can be reduced from 884 mg/L to 0.164 mg/L,reaches the project environmental assessment requirement of 0.2 mg/L emission standards.

关 键 词：预氧化 铁盐沉淀法 高浓度含砷废水 

分 类 号：X703.1[环境科学与工程—环境工程]