摘要
为防治矿山尾矿造成环境污染 ,对方铅矿、闪锌矿、磁黄铁矿、黄铜矿、黄铁矿进行了风化氧化实验研究。结果显示 ,硫化物的氧化速率顺序为 :方铅矿 >闪锌矿 >磁黄铁矿 >黄铜矿 >黄铁矿 ;侵蚀液 pH值越低 ,硫化物氧化速率越大 ;有机物存在对硫化物氧化起缓冲和抑制作用。
The weathering and oxidation of sulfides within mine tailings lead to acid drainage and release of heavy metals, which pollute ground water and surface water and damage ecological environment. Recent researches show that many factors can affect weathering of mine tailings. This paper points out that grain sizes, pH values and concentrations of organic matters in mine tailings can affect weathering and oxidation of sulfides. The qualitative observation and quantitative test of sulfides with optic microscope indicate that the rate of oxidation follows the sequence of PbS>ZnS>Fe 1-x S>CuFeS 2>FeS 2 within sulfides of the same grain size. The experimental results also suggest that organic matters in mine tailings can prevent sulfide minerals from weathering and oxidation.
出处
《岩石矿物学杂志》
CAS
CSCD
北大核心
2002年第3期298-302,共5页
Acta Petrologica et Mineralogica
基金
国家自然科学基金资助项目 (40 0 72 0 17)
安徽省自然科学基金资助项目 (0 0 0 4 5 313)
关键词
尾矿
硫化物
风化
氧化
模拟实验
有机物
环境污染
mine tailing
sulfide minerals
weathering
oxidation
simulation experiment