Arsenic(V) extraction from sulfuric acid media using DBBP-D2EHPA organic mixtures

被引：15

作者：

Ballinas, MD

Miguel, ERD

Muñoz, M

de Gyves, J ^{[1
]}

机构：

[1] Univ Nacl Autonoma Mexico, Dept Quim Analit, Fac Quim, Mexico City 04510, DF, Mexico

[2] Univ Autonoma Barcelona, Fac Ciencies, Unitat Quim Analit, Bellaterra 08193, Barcelona, Spain

来源：

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH | 2003年 / 42卷 / 03期

关键词：

D O I：

10.1021/ie020402a

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Several mixtures of the organophosphorus extractants dibutyl butyl phosphonate (DBBP) and bis(2-ethylhexyl)phosphoric acid (D2EHPA) have been investigated for arsenic removal from sulfuric acid media in a synthetic copper electrolyte solution. The extraction system has been characterized in terms of As(V), metal [Fe(III), Sb(V), Ni(II), Cu(II)], and H2SO4 loadings; extraction and stripping contact times; organic-phase composition; organic-to-aqueous ratio; and selectivity. McCabe-Thiele interpolations indicate a reduction in the arsenic electrolyte concentration from 7300 to 2000 mg/L in two theoretical stages at O/A = 4 for the 1.5 M DBBP-0.5 M D2EHPA mixture at 50 degreesC. For mixtures of DBBP and D2EHPA, there is an increase in the arsenic distribution (synergism) compared to DBBP alone, and at the same time, extractant loss and sulfuric acid coextraction are diminished.

引用

页码：574 / 581

页数：8

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