摘要
通过等温吸附试验,研究了钠基膨润土对不同浓度的Cu2+,Zn2+,Cd2+的吸附情况,结果表明,钠基膨润土对Cu2+,Zn2+,Cd2+有很好的吸附作用,等温吸附曲线符合Langmuir方程,吸附容量随金属离子浓度的增加而增大,并趋于平稳,通过吸附实验发现钠基膨润土对重金属离子的吸附具有选择性,吸附容量的大小顺序为Cu2+>Zn2+>Cd2+.研究表明,钠基膨润土是一种良好的土壤改良剂,可降低土壤中重金属的有效性,且不产生二次污染.
The adsorption of Cu^2＋, Zn^2＋ and Cd^2＋ in Na-bentonite was studied by isothermal adsorption test. The test results show that Na-bentonite has good affinity for Cu^2＋, Zn^2＋ and Cd^2＋, and the isothermal adsorption curve is good accord with Langmuir equation. The adsorption capacities of the Na-bentonite increases with increasing concentration of metals ions. The adsorption capacities of the Na-bentonite are found to have selectivity, and ordered in Cu^2＋ 〉 Zn^2＋〉 Cd^2＋ The research results indicate that Na-bentonite is a good kind of amendments with no second pollution for contaminated soil by heavy metals, and can decrease the efficiency of heavy metal in soil.
出处
《煤炭学报》
EI
CAS
CSCD
北大核心
2009年第6期819-822,共4页
Journal of China Coal Society
基金
国家高科技发展计划(863)基金资助项目(2006AA06Z355)
教育部新世纪优秀人才支持计划项目(NCET-07-0261)
国家自然科学基金资助项目(50572025)
黑龙江省新世纪优秀人才支持计划(1152-NCET-006)
