摘要
室温环境(22±1℃)下研究了不同实验条件下钠活化膨润土去除水溶液中Ni2+和Co2+的能力。所研究的参数为固液比及其溶液阳离子初始浓度,实验包括了膨润土在Ni2+、Co2+不同浓度溶液中分别对Ni和Co的反应。结果表明,膨润土很容易吸附2种金属,但是对Ni表现出了更高的吸附性。对溶液中2种金属离子吸附的协同或抑制作用取决于离子初始浓度,当重金属初始浓度超过膨润土对阳离子交换吸附能力(CEC)时出现过吸附。
The ability of Na-activated bentonite to remove Ni2＋and Co2＋from aqueous solutions at room temperature（22±1 ℃） was studied under various experimental conditions.The parameters studied were solid-to-liquid ratios and initial cation concentrations.Experiments involved the reaction of bentonite to Ni and Co separately when Ni2＋ and Co2＋ with different concentrations and ratios in the solution.The results showed that bentonite can absorpt both metals easily,but higher to Ni.Over-exchange appeared when initial metal concentration exceeds the concentration corresponding to the cation exchange capacity（CEC） of bentonite.Synergistic effect and inhibition of adsorption to two metals depend on initial concentration of ion.
出处
《河北化工》
2012年第2期68-71,77,共5页
Hebei Chemical Industry
关键词
吸附作用
膨润土
阳离子交换
钴吸附
镍吸附
重金属
废水处理
adsorption
bentonite
cation exchange
cobalt absorption
nickel absorption
heavy metals
wastewater treatment
