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
收藏
页码：757 / 759
页数：3
相关论文
共 11 条
  • [1] AGASYAN PK, 1989, OSNOVY ELEKTROKHIMIC
  • [2] BUKETOV EA, 1975, GIDROKHIMICHESKOE OK
  • [3] KARAPETYANTS MK, 1993, OBSHCHAYA NEORGANICH, P410
  • [4] KARYAKIN YV, 1974, CHISTY KHIMICHESKIE, P163
  • [5] Levich V.G., 1959, Physical and Chemical Hydrodynamics
  • [6] MARCHENKO Z, 1968, KOLORYMETRYCHNE OZNA
  • [7] Mishchenko K. P., 1968, VOPROSY TERMODINAMIK
  • [8] NAKOVSKII IA, 1975, KINETIKA PROTSESSOV
  • [9] Nalimov V.V, 1965, STAT METODY PLANIROV
  • [10] POTASHNIKOV YM, 1984, IZV VYSSH UCHEBN ZAV, P57
12