The kinetics of hydrochemical oxidation of iron(II) persulfide (pyrite) by nitric acid

被引：0

作者：

Sobolev, AE ^{[1
]}

Lutsik, VI ^{[1
]}

Potashnikov, YM ^{[1
]}

机构：

[1] Tver State Tech Univ, Tver, Russia

来源：

RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY | 2001年 / 75卷 / 05期

关键词：

D O I：

暂无

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The kinetics of pyrite oxidation by nitric acid was studied by the rotating disk method. The conditions of kinetically and diffusion-controlled processes were determined. At nitric acid concentrations below 9 mol/dm(3), the reaction proceeded in a mixed mode close to kinetically controlled, and the products of acid reduction had an autocatalytic action on the rate of pyrite oxidation. At HNO3 concentrations exceeding 11 mol/dm(3). the reaction proceeded in a mixed mode close to diffusion-controlled, and the rate of the reaction sharply decreased. The reason why pyrite reacted with concentrated nitric acid at a low rate was a decrease in the solubility of reaction products.

引用

页码：757 / 759

页数：3