SEASONAL-VARIATION OF PYRITE OXIDATION RATES IN COLLIERY SPOIL

被引：11
作者：
BACKES, CA
PULFORD, ID
DUNCAN, HJ
机构：
[1] Agricultural, Food and Environmental Chemistry, University of Glasgow, Glasgow
来源：
SOIL USE AND MANAGEMENT | 1993年 / 9卷 / 01期
关键词：
D O I：
10.1111/j.1475-2743.1993.tb00924.x
中图分类号：
S15 [土壤学];
学科分类号：
0903 ; 090301 ;
摘要：
Oxidation rates of pyrite in colliery spoil were measured under both field and laboratory conditions. Field oxidation rates varied through the year, depending primarily upon temperature. Rates of acid release of 7-15 mumoles H+/day were measured in field lysimeters in the period May to November. Little oxidation of the pyrite occurred between November and May; the rates in the summer months were approximately 5-10 times those during the winter. The rate of oxidation in the summer was limited by the solubility of amorphous iron oxides. Slow oxidation during the winter is probably related to the inactivity of Thiobacillus ferrooxidans at low temperatures. The rates of acid production in the laboratory in the temperature range 0-18-degrees-C were similar to those in the field. Materials inhibiting pyrite oxidation should be added when oxidation rates are slow, so that they are not overwhelmed by large amounts of acid.
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页码：30 / 34
页数：5
相关论文
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