摘要
通过实验考察了Cu2+、Co2+、Cd2+、Zn2+和Ni2+五种重金属离子共存时各自在二氧化锰上的吸附边以及EDTA存在时Cu2+在二氧化锰上的吸附边。在改良型金属匹配模型的基础上,发展了多种重金属离子共存的竞争吸附模型和EDTA存在时的重金属离子络合吸附模型,利用所建立的吸附模型可以较好地模拟重金属离子的吸附行为,且利用模拟所得的参数可以预测EDTA存在时Cu2+在二氧化锰上的吸附边。
This paper studied the adsorption edges of each metal ion on manganese dioxide （MnO2） when Cu2＋,Co2＋,Cd2＋,Zn2＋ and Ni2＋ ions co-existed in the solution,and the adsorption edges of Cu2＋ with the presence of EDTA.Based on the modified metal partitioning model,the competition-adsorption model and complexation-adsorption model were developed to simulate the adsorption experimental data collected in this study.The adsorption behavior could be well simulated by the developed models,and the parameters obtained from simulation could well predict the adsorption edge of Cu2＋ onto MnO2 with the presence of EDTA.
出处
《四川环境》
2014年第5期1-7,共7页
Sichuan Environment
基金
国家自然科学基金资助项目(21277095)
关键词
重金属
竞争吸附
络合吸附
模型
EDTA
Heavy metal
competition-adsorption
complexation-adsorption
model
EDTA
