中国煤中硒的研究综述

A summary on the research of Selenium in coal of China

分别从中国煤中硒的丰度、赋存状态和有机亲和性、迁移性和环境效应3个方面讨论了煤中硒的研究概况。硒在煤中相对于地壳中富集,不同地区、不同成煤期,煤中硒的含量差异很大;煤中硒大部分以有机结合态存在,无机结合态的硒大多数存在于黄铁矿中;在燃烧过程中,硒主要以气态的形式进入大气,或被极细飞灰吸附,污染环境,危害人体健康。

This article discusses about the summary on the research of selenium in coal of china separately in three respects as follows, the abundance, the occurrence and organic compatibility, and the migration and the environmental effect included. The content of selenium in coal is comparatively concentrated ; it has a great difference in different areas and different coal forming periods; Selenium mostly exists in the state of organic form in coal, inorganic selenium mainly exists in pyrite. Selenium diffuses into atmosphere in gas state when it is combusted, or it is absorbed by fly-ash, contaminates environment, and be harm to human＇s health.