摘要
垃圾渗滤液主要组分为重金属和大量的溶解性有机物（DOM）.选取我国北方具有代表性的褐土,通过不同pH（59）和温度（15,25和35℃）下的等温吸附试验,研究了垃圾渗滤液中DOM对Cu,Cd,Pb和Zn 4种重金属在土壤中吸附行为的影响.结果表明：DOM对Cu和Cd在土壤中的吸附促进作用较明显,对Pb有微弱的促进作用,对Zn的吸附影响不明显;改变pH,DOM对4种重金属在褐土中的吸附也表现出不同的影响,吸附平衡后土壤溶液pH变化差异明显;25℃下Cu在土壤中的吸附量高于15和35℃条件下;有DOM时,Cd,Zn和Pb在土壤中的吸附量随着温度的升高而增大.
Landfill leachate contains a lot of heavy metals and much dissolved organic matter（DOM）.This study investigated the effect of leachate DOM on the adsorption of Cu,Cd,Pb and Zn in typical cinnamon soil in Northern China.The adsorption experiments were conducted under the conditions of isotherm at 15,25,（35 ℃） and at various acidities（pH=5-9）.The results revealed that leachate DOM significantly enhanced the adsorption of Cu and Cd on the soil,but slightly improved that of Pb.The influence on Zn was not observed.However,the effect of leachate DOM on the adsorption of the four metals tended to vary with the change of pH.After the adsorption equilibrium,various pH were detected in the soil solution.Among the studied temperatures（15,25 and（35 ℃））,the maximum adsorption of Cu occurred at（25 ℃）,while the adsorptions of Cd,Pb and Zn were elevated by the increase of the temperature.
出处
《环境科学研究》
EI
CAS
CSCD
北大核心
2010年第2期215-221,共7页
Research of Environmental Sciences
基金
河海大学水文水资源与水利工程科学国家重点实验室开放基金项目(2005409311)
河北省环境工程重点学科项目
石家庄市建设科学研究计划项目(0705)
关键词
溶解性有机物
重金属
褐土
吸附
dissolved organic matter
heavy metals
cinnamon soil
adsorption
作者简介
庞会从（1966-），女，河北晋州人，高级工程师，硕士，从事水处理理论与技术研究。panghuicong@hebust．edu．cn．
责任作者，高太忠（1957-），男，河北行唐人，教授，博士，从事环境化学与环境修复技术研究，taizhonggao@hebust．edu．cn
