改性铁矾土深度处理含砷废水试验研究  

Experimental research on the modified laterite for the advanced treatment of wastewater containing arsenic

作　　者：陈建宏[1] 刘兴旺[1,2,3] 游志敏[2,3] 

机构地区：[1]中南大学资源与安全工程学院,湖南长沙410083 [2]湘潭大学环境科学与工程系,湖南湘潭411105 [3]重金属污染控制湖南省普通高等学校重点实验室,湖南湘潭411105

出　　处：《工业水处理》2016年第4期30-33,共4页Industrial Water Treatment

基　　金：国家水体污染控制与治理科技重大专项(2008ZX07212-001-06)

摘　　要：以天然铁矾土制备得到改性铁矾土除砷吸附剂,以某铅锌冶炼企业含砷废水为研究对象,考察进水pH、砷浓度、滤速等因素对砷去除率的影响,并考察了吸附剂再生后的吸附效果。结果表明,化学改性处理后,铁矾土对废水中砷的动态吸附容量明显提高,处理后废水中的残余砷浓度低于《铅、锌工业污染物排放标准》(GB 25466—2010)中砷排放浓度限值。用质量分数为5%的Na OH溶液对饱和改性铁矾土进行再生,能有效恢复其砷吸附容量。Modified laterite（ML） as a kind of adsorbent for removing arsenic has been made from natural laterite.Taking the arsenic-containing wastewater from a lead-zinc smelting enterprise as the research object,the influences of the factors,such as influent p H,arsenic concentration,filtration velocity,etc. on the arsenic removing rate are investigated,and the adsorbing effect of the regenerated adsorbent are investigated,as well. The results show that the dynamic arsenic adsorption capacity of laterite is highly enhanced after chemical modification, and the residual arsenic concentration of the treated wastewater is lower than the limit value of arsenic discharge concentration specified in the Emission Standard of Pollutants for Lead and Zinc Industry（GB 25466—2010）. Na OH solution at a mass friction of 5% is used in the regeneration treatment of saturated and modified laterite,which can effectively recover arsenic adsorbing capacity.

关 键 词：砷 吸附 铁矾土 改性 

分 类 号：X703[环境科学与工程—环境工程]