SOLVENT-IMPREGNATED RESINS CONTAINING DI-(2,4,4-TRIMETHYLPENTYL)PHOSPHINIC ACID .2. STUDY OF THE DISTRIBUTION EQUILIBRIA OF ZN(II), CU(II) AND CD(II)

被引：48

作者：

CORTINA, JL ^{[1
]}

MIRALLES, N ^{[1
]}

SASTRE, AM ^{[1
]}

AGUILAR, M ^{[1
]}

PROFUMO, A ^{[1
]}

PESAVENTO, M ^{[1
]}

机构：

[1] UNIV PAVIA,DEPT CHEM,I-27100 PAVIA,ITALY

来源：

REACTIVE POLYMERS | 1993年 / 21卷 / 1-2期

关键词：

IMPREGNATED RESINS; DI-(2,2,4-TRIMETHYLPENTYL)PHOSPHINIC ACID; AMBERLITE XAD-2 ADSORBENT; METAL DISTRIBUTION; EXTRACTION CONSTANTS; ZN(II); CU(II); CD(II);

D O I：

10.1016/0923-1137(93)90058-N

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

The extraction of Zn(II), Cu(II) and Cd(II) from nitrate solutions at 0.1 ionic strength by impregnated resins containing di-(2,4,4-trimethylpentyl)phosphinic acid (HL) has been studied at 25-degrees-C. The distribution coefficient of the metal ion was determined as a function of both pH and extractant concentration in the resin phase, and the data were analyzed graphically using the slope analysis method and numerically using the program LETA-GROP-DISTR. Analysis of the results showed that the extraction of these metal ions can be explained by the formation of metal complexes in the resin phase with a general composition ML2(HL)q where the value of q depends on the metal. Extractions reactions are proposed and the extraction constants of these reactions are presented. Finally, a comparison between the extraction of Zn(II), Cu(II) and Cd(II) with di-(2,4,4-trimethylpentyl) phosphinic acid sorbed into Amberlite XAD-2 and the extraction using an organic solvent as Isopar H has been made.

引用

页码：103 / 116

页数：14

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