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- W2375243402 abstract "Surface sediment samples were gathered of Changsha-Zhuzhou-Xiangtan section of the Xiangjiang River . Optimized BCR sequential extraction procedure was used to carry out morphological analysis of heavy metals in the surface sediments,the distribution and the biological availability of heavy metals in the form of research are discussed. The results show that:Cd,Zn,Mn elements of the acid dissolution form compared to other forms of content is higher,and the biological availability is strong. Mn,Pb elements of iron-manganese oxide bound content are relatively high. Under certain conditions,they will be strong released and secondary pollution is easy to create. Cu was mainly associated with the oxidable fraction and the residual fraction,at the propriety geochemistry conditions,it may be released into the environment,certain threat will be formed to the periphery ecosystem. Although Cd and Zn mainly exist in a residue state, the acid-soluble state is also taking up a considerable proportion,and has large total quantity ,the pollution can not be ignored. Cr and Ni mainly exist as residue form,they are stable and not easy to be released in the environment,so ecological harm is very low,and won't break out in short time. 8figs.,1tab.,10refs." @default.
- W2375243402 created "2016-06-24" @default.
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- W2375243402 date "2009-01-01" @default.
- W2375243402 modified "2023-09-27" @default.
- W2375243402 title "Heavy metals speciation and its biological availability in sediment patterns of Changsha-Zhuzhou-Xiangtan section of the Xiangjiang River" @default.
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