仲壬基苯氧基乙酸萃取金属离子

Extraction of Metal Ions with sec-Nonylphenoxy Acetic Acid

研究了仲壬基苯氧基乙酸在盐酸介质中对 Eu3+ ,Zn2 + ,Cd2 + ,Co2 + ,Ni2 + ,Cu2 + ,Mn2 + ,Mg2 + 等金属离子的萃取行为 ,考察了平衡水相酸度 ,萃取剂浓度等因素对萃取平衡的影响 ,得到了萃取平衡方程 .根据金属离子之间的分离系数值可看出 ,通过控制适当的酸度 ,有可能分离 Eu3+中通常伴生的一些金属离子 ,同时还可能达到 Co2 +与 Ni2 + ,Zn2 +与 Cd2

The extraction behavior of metal ions including Eu 3+ , Zn 2+ , Cd 2+ , Co 2+ , Ni 2+ , Cu 2+ , Mn 2+ , Mg 2+ from hydrochloric acid solutions have been investigated using a novel extractant, sec nonylphenoxy acetic acid(HA), in n heptane. The effects of equilibrium acidity in aqueous phase and extractant concentration on extraction equilibrium have been studied in detail and the extraction equations have been deduced based on slope analysis of lg D vs pH and lg D n pH v s lg . At suitable pH values, Eu 3+ can be effectively separated from Cu 2+ , Co 2+ , Ni 2+ , Zn 2+ , Cd 2+ , Mn 2+ and Mg 2+ , Co 2+ from Ni 2+ , and Zn 2+ from Cd 2+ .