片沸石、钙基膨润土去除垃圾渗滤液中有害物质的实验研究  

EXPERIMENTAI RESEARCH ON REMOVAL OF COD AND AMMONIA-NITROGEN FROM LANDFILL LEACHATE BY HEULANDITE AND Ca-BENTONITE

作　　者：姜浩[1] 廖立兵[1] 郑红[1] 王军玲[1] 敖卫华[1] 

机构地区：[1]中国地质大学材料科学与工程学院水资源与环境工程北京市重点实验室,北京100083

出　　处：《矿物岩石》2007年第3期116-120,共5页Mineralogy and Petrology

基　　金：北京市自然科学基金(资助号:2072016);北京市教委共建项目:北京市地下水石油污染机理治理研究与水资源的可持续利用项目

摘　　要：以位于北京昌平小汤山的阿苏卫垃圾卫生填埋场渗滤液为研究对象，在不同的环境条件下：酸度（pH=5-9），温度（4℃-30℃），利用片沸石、钙基膨润土去除垃圾渗滤液中有害物质的实验，以化学耗氧量（COD）、氨氮为评价指标，分别探讨片沸石、钙基膨润土的COD、氨氮去除效果与其用量、渗滤液pH、温度、振荡时间的关系。研究表明，在实验条件下，片沸石对COD的最大去除量约为31×10^-3，对氨氮的最大去除量约为27×10^-3；去除COD、氨氮的最佳条件分别为：片沸石用量20 g/L、pH为5、温度4℃、振荡时间100 min。在实验条件下，钙基膨润土对COD的最大去除量约为63×10^-3，对氨氮的最大去除量约为14×10^-3；去除COD、氨氮的最佳条件分别为：钙基膨润土用量30 g/L、pH为5、温度4℃、振荡时间100 min。根据实验结果，对片沸石、钙基膨润土去除COD、氨氮的机理主要是氢键、静电作用及离子交换作用。Experiments under different environmental conditions have been conducted by using heulandite and Ca-bentonite as the absorbents to eliminate COD and ammonia-nitrogen from landfill leachate in a landfill in .the suburbs of Beijing. The capacities of heulandite and Ca-bentonite to eliminate COD and ammonia-nitrogen were studied, and the relationships between removal percentages and the mass of heulandite or Ca-bentonite, the initial pH of landfill leachate, the absorption temperature and vibration time were investigated. In the experiments, the optimum conditions for COD and ammonia-nitrogen to wipe off COD and ammonia-nitrogen from the landfill leachate were obtained and the mechanisms of removal of COD and ammonia-nitrogen from land- fill leachate by heulandite and Ca-bentonite were discussed.

关 键 词：垃圾渗滤液 COD 氨氮 

分 类 号：P579[天文地球—矿物学]