摘要
采用底泥原地稳定化处理技术中的帽封方法,考察膨润土对苏州河底泥中Cu2+、Pb2+和Zn2+3种重金属离子释放的抑制效果。结果表明:钙基膨润土对Cu2+、Pb2+和Zn2+的最大吸附容量分别为273.4 mg.g-1、473.6mg.g-1和263 mg.g-1;均具有较强的吸附性能;且在溶液pH值升高时,其对Cu2+、Pb2+和Zn2+的吸附效果增强。在Zn-Pb混合体系下,钙基膨润土对Pb2+吸附效果增强,Zn2+的吸附效果不明显;而在Zn-Cu混合体系下,钙基膨润土对Cu2+效果增强,对Zn2+的吸附效果减弱。
The effect of suppression on Cu2+,Pb2+ and Zn2+ heavy metal ions from Suzhou Creck sediment by using calcium bentonite as capping material for in-situ sediment treatment.The results showed that the maximum adsorption capacity of Cu2+,Pb2+ and Zn2+ were 273.4 mg·g-1,473.6 mg·g-1 and 263 mg·g-1,respectively.And the adsorption efficiency of bentonite on these metal ions was increased with pH increasing.In Zn-Pb coexisting system,the adsorption efficiency of bentonite on Pb2+ ion was increased obviously.However,the little effect on Zn2+ was found.The adsorption efficiency of bentonite on Cu2+ ion was enchanced in Zn-Cu coexisting system,but which was decreased on Zn2+.
出处
《南昌大学学报(工科版)》
CAS
2012年第4期337-340,346,共5页
Journal of Nanchang University(Engineering & Technology)
基金
国家高技术研究发展计划(863计划)资助项目(2005AA60101005)
关键词
底泥
原地稳定化
帽封
膨润土
重金属
sediment
in-situ treatment
capping method
bentonite
heavy metal