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Release of carbon from rocks during their weathering is closely linked to its global circulation. Thecontents and chemical forms of inorganic carbon in limestone, mudstone, granite and basalt as well as in theirweathering and pedogenic products have been examined. The results show that a geochemical process ofcarbon release from the rocks in the early stage of weathering is followed by its accumulation in the subsequentweathering products. The environmental geochemical behavior of some heavy metals related to inorganic carbon release and itsaccumulation are also studied in this paper. Experimental results show that the capacity of manganese toassociate with carbonates increases with increasing concentrations of the latter, but the behavior of copper isopposite to that of manganese.
Thecontents and chemical forms of inorganic carbon in limestone, mudstone, granite and basalt as well as in their weathering and pedogenic products have been examined. The results show that a geochemical process ofcarbon release from the rocks in the early stage of weathering is by by accumulation in the subsequent weathering products. The environmental geochemical behavior of some heavy metals related to inorganic carbon release and itsaccumulation are also studied in this paper. Experimental results show that the capacity of manganese toassociate with carbonates increases with increasing concentrations of the latter, but the behavior of copper isopposite to that of manganese.