用聚乙二醇-硫酸铵-铬黑T体系从铁(Ⅲ)、钴(Ⅱ)、镍(Ⅱ)、铜(Ⅱ)中萃取分离镉的研究  

Extraction Separation of Cadmium ( Ⅱ ) From Iron(Ⅲ ), Cobalt (Ⅱ ),Nickel ( Ⅱ ) and Copper ( Ⅱ ) Using Polyethylene Glycol-Ammonium Sulfate-Eriochrome Black T System

作　　者：邓凡政[1] 石影[1] 刘庆 

机构地区：[1]淮北煤炭师范学院化学系,淮北235000

出　　处：《分析化学》1995年第7期832-834,共3页Chinese Journal of Analytical Chemistry

摘　　要：本文研究了聚乙二醇（ＰＥＧ）－（ＮＨ４）２ＳＯ４－铬黑Ｔ（ＥＢＴ）体系对Ｆｅ（Ⅲ）、Ｃｏ（Ⅱ）、Ｎｉ（Ⅱ）、Ｃｕ（Ⅱ）、Ｃｄ（Ⅱ）的非有机溶剂萃取行为。结果表明，在ｐＨ７￣１１的ＮＨ３·ＨＮＨＣｌ缓冲溶液中，Ｆｅ（Ⅲ）、Ｃｏ（Ⅱ）、Ｎｉ（Ⅱ）、Ｃｕ（Ⅱ）可被聚乙二醇（ＰＥＧ）相萃取，而Ｃｄ（Ⅱ）基本上不被萃取，从而获得了Ｃｄ（Ⅱ）与Ｆｅ（Ⅲ）、Ｃｏ（Ⅱ）、Ｎｉ（Ⅱ）、Ｃｕ（Ⅱ）混合离子的定量分离。In polyethylene glycol (PEG)-ammonium sulfate-Eriochrome Black T(EBT) system, the extraction behaviour of the complexes of Fe( Ⅲ ),Co( Ⅱ ),Ni( Ⅱ ),Cu( Ⅱ ) and Cd ( Ⅱ ) was investigated. The results indicated that complexes of Fe( Ⅲ ), Co( Ⅱ ), Ni( Ⅱ ) and Cu( Ⅱ ) with EBT were almost extracted by PEG phase while Cd( Ⅱ ) was not extracted in the water solutions of NH3 · H2O-NH4Cl(pH7-11). So that Cd( Ⅱ ) was quantitatively separated from mixed solutions of Cd( Ⅱ ), Fe( Ⅲ ), Co( Ⅱ ), Ni( Ⅱ ) and Cu( Ⅱ ) ions.

关 键 词：铬黑T 萃取 聚乙二醇 铁 钴 镍 铜 镉 

分 类 号：O614.242[理学—无机化学] O658.2[理学—化学]