内蒙古西北部典型棕钙土对砷和重金属的吸附-解吸能力研究  

Adsorption-Desorption Mechanism of Arsenic and Heavy Metals in Typical Brown Soils in Northwestern Inner Mongolia

作　　者：李元杰 李林 刘永茂 王梁 王梦琳 宋帅[3] LI Yuan-jie;LI Lin;LIU Yong-mao;WANG Liang;WANG Meng-ling;SONG Shuai(Inner Mongolia Institute of Geological Environmental Monitoring,Hohhot 010020,China;Inner Mongolia Autonomous Region Metallurgical Research Institute,Hohhot 010010,China;State Key Laboratory of Urban and Regional Ecology,Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing 100085,China)

机构地区：[1]内蒙古自治区地质环境监测院,内蒙古呼和浩特010020 [2]内蒙古自治区冶金研究院,内蒙古呼和浩特010010 [3]中国科学院生态环境研究中心城市与区域生态国家重点实验室,北京100085

出　　处：《内蒙古师范大学学报（自然科学汉文版）》2019年第5期452-457,共6页Journal of Inner Mongolia Normal University(Natural Science Edition)

基　　金：内蒙古自治区科技创新引导奖励资金项目(20131510);内蒙古自然科学基金资助项目(2014MS0553,2015KF01)

摘　　要：以内蒙古自治区西北部典型棕钙土为研究对象,系统分析棕钙土的理化性质,并分别对砷和重金属离子在棕钙土表面的等温吸附进行Langmuir和Freundlich模型拟合,研究棕钙土对几种离子的吸附能力,加入硝酸铵作为解吸剂开展解吸试验确定各离子解吸难易程度.结果表明:棕钙土对砷和其他四种重金属吸附性强弱表现为Pb>Cu>Zn>Cd>As;解吸剂对五种重金属离子的解吸量大小顺序为:Cu>Zn>Cd>Pb>As.The typical brown soil in the northwest of Inner Mongolia Autonomous Region was used to study its adsorption-desorption mechanism for arsenic and heavy metals.The physicochemical properties of brown soil were systematically analyzed.The Langmuir and Freundlich models were applied to simulate the isothermal adsorption of arsenic and heavy metal ions of brown soil.The ammonium nitrate was used as a desorbent to carry out the desorption test and determine the desorption capability of each ion.The results showed that the order of adsorption strength for arsenic and the other heavy metals in brown soil was Pb>Cu>Zn>Cd>As and that of desorption for the ions was Cu>Zn>Cd>Pb>As.

关 键 词：棕钙土 砷和重金属 吸附-解吸附 

分 类 号：X53[环境科学与工程—环境工程]