2-乙基己基膦酸单2-乙基己酯萃取金属离子的系统研究

A Systematic Study on Extraction of Metal lons With Mono(2-ethylhexyl)-2-ethylhexyl Phosphonate

本文对十三种金属离子被 P507萃取的性能进行了系统的研究。通过回归分析确定了聚合度之值,证明了萃取机理为阳离子交换,并由建立的萃取模型计算出了金属离子被萃 pH值范围及 pH_(1/2)值。最后,从金属离子的电子层结构分析了金属离子的被萃行为。

The extraction behaviour of 13 metal ions has been studied with mono(2-ethylh- exyl)-2-ethylhexyl phosphonate in this paper.The polymerization degree of complex was determined by the method of regression,and it proved that the mechanism is positive-ion- exchange.We established a model which is used to calculate the range of pH and pH_(1/2), and explained the extraction behaviour of ions said above from their electronic structures.