不同含水介质对污染河流中六价铬去除的对比模拟实验研究  

Study on Removal of Cr (VI) in Polluted Rivers by Using Different Mediums

作　　者：李志萍[1] 屈吉鸿[1] 沈照理[2] 钟佐燊[2] 

机构地区：[1]华北水利水电学院,郑州450008 [2]中国地质大学资源与环境学院,北京100083

出　　处：《工程勘察》2005年第4期19-22,共4页Geotechnical Investigation & Surveying

基　　金：国家自然科学基金项目(49832005);国家重点基础研究发展规划项目(G1999045706);院青年科研基金资助

摘　　要：室内试验选用3种天然砂土作为渗透介质,以生活污水模拟污染河流,发现铬在粗砂中第13天产生穿透,以后去除率为81%～99%,2种中砂的去除率始终大于92%和96%,铬很难进入地下水;还原和沉淀反应是Cr(Ⅵ)去除的主要机理;由于长期污染河流下部渗透介质始终处于厌氧环境,其中富含还原性物质,Cr(Ⅵ)可以通过沉淀反应大部分得以去除,所以污染的河流不是地下水铬污染的来源.Three kinds of natural sands are used as the infiltration medium,and the domestic sewage is simulated as the polluted rivers in laboratory tests.It is founded that the penetration of Cr(Ⅵ) in coarse sand occurs at the thirteen-day and the removal rate of Cr(Ⅵ) is 81%～99%,and that the removal rates of Cr(Ⅵ) in the two kinds of medium sands are greater than 92% and 96% respectively and Cr(Ⅵ) is different to penetrate into groundwater.The reduction and sedimentation actions are the main mechanism for the removal of Cr(Ⅵ).So the Cr(Ⅵ) can be removed by sedimentation action,and the polluted rivers are not the source of the Cr pollution in groundwater.

关 键 词：污染河流 Cr(Ⅵ) 模拟实验 地下水 

分 类 号：P641.8[天文地球—地质矿产勘探]