Synergistic effect of MEHPA on co-extraction of zinc and cadmium with DEHPA
Synergistic effect of MEHPA on co-extraction of zinc and cadmium with DEHPA
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MEHPA与DEHPA共萃取锌、镉的协同效应
DOI：
10.1016/j.mineng.2003.10.003
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发表时间：
2004
期刊：
影响因子：
--
通讯作者：
D. Behnian
中科院分区：
文献类型：
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作者：
E. K. Alamdari;D. Moradkhani;D. Darvishi;M. Askari;D. Behnian
研究了二（2-乙基己基）磷酸（DEHPA）和单（2-乙基己基）磷酸（MEHPA）的混合物对锌和镉的同时萃取，以及MEHPA与DEHPA共萃取锌和镉的协同效应。结果表明，萃取锌和镉的DEHPA和/或MEHPA可以增加pH值的增加。结果还表明，锌的pH值0.5，增加MEHPA从0.1到8体积%，没有显着变化，而镉的变化从0.63到2.4。换句话说，MEHPA防止从含有锌和镉的水性介质中选择性提取锌。对选择性分离参数βZn/Cd的研究表明，当MEHPA的体积分数从0.1%增加到8.0%时，β Zn/Cd降低了50 ~ 13倍。研究了DEHPA和MEHPA浓度对锌镉共萃取的影响。
Simultaneous extraction of zinc and cadmium by a mixture of di-2-ethyl hexyl phosphoric acid (DEHPA) and mono-2-ethyl hexyl phosphoric acid (MEHPA), and the synergistic effect of MEHPA on co-extraction of zinc and cadmium with DEHPA have been investigated. It was shown that the extraction of zinc and cadmium by DEHPA and/or MEHPA can be increased by an increase of pH. The results also illustrate that the pH0.5of zinc, by increase in MEHPA from 0.1 to 8 vol%, did not vary significantly while that of cadmium varies from 0.63 to 2.4. In other words MEHPA prevents selective extraction of zinc from aqueous media containing both zinc and cadmium. Studies on the selective separation parameter βZn/Cdshow that it was reduced 50 to 13 times by an increase in MEHPA from 0.1 to 8.0 vol%. In this paper, the effects of DEHPA and MEHPA concentration on co-extraction of zinc and cadmium have been investigated.