湖泊沉积物中硫的地球化学循环机制研究

The Study of Sulfur Geochemical Cycle Mechanisms in Lake Sediments

湖泊沉积物中的硫是控制氧化还原体系的重要元素之一。湖泊硫酸盐还原作用主要发生在沉积物表层几厘米范围内 ,界面硫酸盐还原具有双重环境效应。硫酸盐还原主要形成黄铁矿和有机硫 ,黄铁矿的生成要受到沉积物中硫酸盐、有机质以及铁氧化物活性的控制。单硫化物不稳定 ,并且会影响沉积物中重金属的迁移。

WT5”BZ]S is one of important elements which control redox system in lake sediments Sulfate reduction can mainly take place in surface layer and form pyrite and organic sulfur The formation of pyrite is controlled by sulfate,organic matter and the reactiveness of Fe oxide Sulfate reduction has a double environmental effect AVS is unstable and would influence the transition of trace metals