预氧化-铁盐法处理含砷废水试验研究  

Pre-oxidation-Ferric Salt Method for Treatment of Arsenic-Containing Wastewater

作　　者：崔剑 Cui Jian(Taiyuan Solid Waste Disposal Center of Shanxi Province,Taiyuan,Shaanxi 030000,China)

机构地区：[1]山西省太原固体废物处置中心,山西太原030000

出　　处：《绿色科技》2020年第18期107-109,共3页Journal of Green Science and Technology

摘　　要：研究了通过使用次氯酸钠来氧化三价砷废液,以FeCl3-Ca(OH)2为沉淀剂来去除水中的砷,考察了溶液pH值、温度、n(Fe)/n(As)、反应时间等对砷去除的影响。结果表明:在溶液pH=10、n(Fe)/n(As)=3、反应时间3 h、温度25℃条件下,水样中砷含量可降至0.5 mg/L以下,达到《污水综合排放标准》GB 8978-1996要求。Arsenic in water was removed by oxidation of trivalent arsenic waste solution with sodium hypochlorite and FeCl3-Ca(OH)2 As precipitant.The effects of Ph,temperature,n(Fe)/N(As)and reaction time on arsenic removal were investigated.The results show that under the conditions of Ph 10,n(Fe)/N(As)3,reaction time 3 H and temperature 25℃,the content of arsenic in the water sample can be reduced to less than 0.5 mg/L,which meets the requirements of Comprehensive Wastewater Discharge Standard(GB8978-1996)

关 键 词：砷废液 预氧化 铁盐法 

分 类 号：X703[环境科学与工程—环境工程]