MECHANISM OF DISSOLUTION OF MAGNETITE BY OXALIC ACID-FERROUS ION SOLUTIONS

被引：139
作者：
BLESA, MA
MARINOVICH, HA
BAUMGARTNER, EC
MAROTO, AJG
机构：
[1] The Departamento Quimica de Reactores, Comision Nacional de Energia Atomica
来源：
INORGANIC CHEMISTRY | 1987年 / 26卷 / 22期
关键词：
D O I：
10.1021/ic00269a019
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
The kinetics of the reductive dissolution of magnetite by ferrous ions in solutions of high oxalate concentration has been studied at 30 °C and various pH values. The rate-determining step is proposed to be the outer-sphere electron transfer from Fen(C204)2”, located in the Stern plane, to a surface oxalate—iron(III) complex. Analysis of the work term and electron-transfer Gibbs energy shows that FeII(C204)22-is a reasonable choice for the reductant species. Dissolution also requires protonation of the surface sites, in a process described by a Freundlich-type isotherm. © 1987, American Chemical Society. All rights reserved.
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收藏
页码：3713 / 3717
页数：5
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