不同吸附材料去除土壤淋洗液中砷的效果研究  

Removal Efficiencies of Different Adsorption Materials to Arsenic in Soil Leachate

作　　者：王建益 张杨珠[1] 阎秀兰[2] 林龙勇[2] 费杨[2] 廖晓勇[2] 

机构地区：[1]湖南农业大学资源与环境学院,湖南长沙410128 [2]中国科学院地理科学与资源研究所,北京100010

出　　处：《湖南农业科学》2013年第5期46-49,共4页Hunan Agricultural Sciences

基　　金：国家高技术研究发展计划(863)课题(2012AA-06A201);北京市科技计划课题(Z121109003112077)

摘　　要：原位淋洗技术是土壤砷污染修复领域的热点,但含砷淋洗液的处理仍然是一个难题。试验研究了铁粉、氧化铁、活性炭、膨润土及其混合物共8种材料对含砷淋洗液中砷的吸附效果和吸水特性,以期筛选出最佳除砷材料。结果表明:氧化铁和氧化铁+活性炭(1:1)两种材料对砷的去除效果最好,去除率达100%;氧化铁+活性炭(1∶2)、活性炭、膨润土+活性炭(1∶1)、铁粉等4种材料去除砷也有较好效果,去除率分别为78.9%、73.3%、36.5%、27.2%;膨润土、铁粉+膨润土两种材料对淋洗液中的砷无去除效果。综合考虑认为,氧化铁+活性炭(1:1)材料具有效率高、成本低的优势,是吸附砷污染废液中砷的较好材料。In situ leaching technology is one of the hottest topics in the area of remediating arsenic contaminated soil,while treatment of its arsenic-contained leachate is still a problem.In order to select the best adsorbent for arsenic,the arsenic adsorption efficiency and the water absorption character of eight materials(iron powder,iron oxide,activated carbon,bentonite and their mixtures) were studied.The results showed that iron oxide and iron oxide + activated carbon(1:1) had the best arsenic removal effects,and their removal rate all reached 100%;iron oxide + activated carbon(1:2),activated carbon,bentonite + activated carbon(1:1) and iron powder also had a better arsenic removal effect,and their removal rates were 78.9%,73.3%,36.5% and 27.2%,respectively;bentonite and iron powder + bentonite had no significant arsenic removal effect.Therefore,considering the material cost and the arsenic removal rate,iron oxide + activated carbon(1:1) is a relatively better material for remediating arsenic-contaminated leachate for its high efficient and low cost.

关 键 词：土壤砷 淋洗液 吸附材料 去除效率 

分 类 号：S[农业科学]