摘要
利用沸石吸附去除重金属废水中以络离子形态存在的镉,实验考察了沸石用量、振荡时间、pH和温度对吸附效果的影响,探讨了吸附作用机理。结果表明,沸石对Cd(NH3)42+有良好的吸附性能,废水pH、温度和吸附时间是影响吸附效果的主要因素。在Cd(NH3)42+浓度低于50mg·L-1,吸附规律基本符合Freundlich模式,高于50mg·L-1时,不能满足常规吸附规律。
The adsorption of permutite was used to remove Cd（ NH3 ）4^2＋ in the heavy metals wastewater. The effect of shaking time, temperature and pH value on the adsorption Cd（ NH3 ）4^2＋ onto permutite was investigated. The mechanism for the adsorption was studied. The results indicate that shaking time, tempera- ture and pH value are the main factors to affect adsorption of Cd（ NH3 ）Z~. The adsorption of Cd（ NH3 ）4^2＋ on to permutite can be described by Freundlich models when the concentration of Cd（ NH3）4^2＋ under 50mg·L^-1.
关键词
沸石
吸附
镉氨络离子
重金属废水
Permutite
adsorption
complex cadmium ammine ion
heavy metals wastewater
