碳及重金属在岩石风化过程中释放规律的初步研究

A PRELIMINARY STUDY OF THE RULE OF RELEASE OF CARBON AND HEAVY METALS DURING WEATHERING OF ROCKS

岩石在风化过程中释放的碳,是全球碳循环的一个重要组成部分。对碳酸盐岩、泥质岩、花岗岩、玄武岩等母岩以及不同风化阶段和成土过程产物中无机碳的研究表明,碳都有一个从母岩中释放和又重新积累的过程。

The release of carbon from rocks during their weathering is closely linked to the global carbon cycle. The contents and chemical forms of inorganic carbon in limestones, mudstones, granites and basalts as well as in their weathering and pedogenic products have been examined. The results indicate that a geochemical process of carbon release from rocks in the early stages of weathering is followed by its accumulation in the weathering products.The environmental geochemical behavior of some heavy metals related to inorganic carbon release and its accumulation are also studied in this paper, The experimental results show that the capacity of manganese association with carbonates increases with increasing content of carbonate, but the behavior of copper is opposite to that of manganese.