Kinetics and mechanism of conversion of carcinogen hexavalent Cr(VI) to Cr(III) by reduction with ascorbate

被引：0

作者：

Kazmi, SA ^{[1
]}

Rahman, MU ^{[1
]}

机构：

[1] Univ Karachi, Dept Chem, Karachi 75270, Pakistan

来源：

JOURNAL OF THE CHEMICAL SOCIETY OF PAKISTAN | 1997年 / 19卷 / 03期

关键词：

D O I：

暂无

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

To asses the therapeutic efficacy of ascorbic acid in preventing toxic and mutagenic effects of Cr(VI) to Cr(III) the Kinetics and mechanism of reduction of hexavalent chromium by ascorbate has been studied. The reduction was done under pseudo first order condition by taking an excess of ascorbate over hexavalent chromium species. The rise of absorbance of Cr(III) was monitored at 578 nm. The observed rate constants then determined showed a dependence on both ascorbate concentration and pH as well. The bearing of these observations on the mechanism of reduction of hexavalent chromium is discussed in order to explain this.

引用

页码：201 / 204

页数：4

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