摘要
采用窄缝槽实验装置,分别模拟岩溶水系统内单一Mn、Cr(Ⅵ)以及Mn-Cr(Ⅵ)复合体系的动态吸附、物理解吸、化学解吸3个阶段的行为特征,分析含锰、铬污水对地下水的污染规律及其相互作用.结果表明:土壤对单一体系Mn的吸附率远大于Cr(Ⅵ),但两者均以专性吸附为主,不易活化、迁移;在复合体系内均出现吸附率降低、解吸率升高,表现为以物理吸附为主,易活化、迁移,从而引起水体重金属污染;两者表现为显著的协同作用,但Mn对Cr(Ⅵ)的影响远小于Cr(Ⅵ)对Mn的影响;在酸性环境下,Mn对Cr(Ⅵ)的化学活性有轻微的抑制作用.
Using narrow-slit experimental plants,this paper simulates behavioral features of dynamic adsorption,physical desorption,chemical desorption of single Mn system,single Cr(Ⅵ) system and Mn-Cr(Ⅵ) complex system in karst groundwater system.The results indicate that:(1) Under a single system,soil absorption rate of Mn is much larger than that of Cr(Ⅵ);and the two are of specific-orientated adsorption,and difficult to be activated and migrate;(2) Under complex system,the two metals both show absorption rate reduction,desorption rate increase and easy to be activated,migrate;(3) the two metals both show synergistic action,however the effect of Mn to Cr(Ⅵ) is smaller than that of Cr(Ⅵ) to Mn.
出处
《地球科学(中国地质大学学报)》
EI
CAS
CSCD
北大核心
2012年第2期289-293,共5页
Earth Science-Journal of China University of Geosciences
基金
国家重点基础研究发展计划"973"项目(No.2011CB201001)
中国地质调查局地质调查项目(No.1212011121166)
中国地质科学院岩溶所所长基金(No.201011)
关键词
重金属
交互作用
岩溶区
水-土-岩系统
吸附
解吸
水文地质
环境工程
heavy metals
cross action
karst area
water-soil-rock system
adsorption
desorption
hydrogeology
environmental engineering.