Chemical forms of cobalt and nickel extracted by M1, M3 and CaCl2 DTPA |
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作者姓名: | Wen Bei Qian Jin Chen Bin Shan Xiaoquan |
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作者单位: | Research Center for Eco Environmental Sciences;Chinese Academy of Sciences;Beijing 100085;China,Research Center for Eco Environmental Sciences;Chinese Academy of Sciences;Beijing 100085;China,Research Center for Eco Environmental Sciences;Chinese Academy of Sciences;Beijing 100085;China,Research Center for Eco Environmental Sciences;Chinese Academy of Sciences;Beijing 100085;China |
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基金项目: | This work was supported by Natural Science Foundation of China and was done in the State Key Laboratory of Environmental Aquatic Chemistry. |
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摘 要: | Mehlich 1(M1), mehlich 3(M3) and CaCl2 DTPA have been used to predict the available micronutrient in soil. However, the forms of micronutrient extractable by these extractants are not known. In the present study, ten soils, collected from five provinces and the capital of China, representing a wide range of chemical and physical properties, were analyzed by sequential extraction to isolate five forms of cobalt and nickel, they are exchangeable, carbonate bound, Fe Mn oxide bound, organically bound and residual forms. The chemical forms extracted by M1, M3 and CaCl2 DTPA were also investigated. The results show strong correlation between the carbonate bound or organically bound forms of Co or Ni and the amounts of extractable by any of the above three extractants. The main forms extracted by these extractants are carbonate and organically bound forms. The ranking of these three extractants for extraction of Co and Ni are M1>M3=CaCl2 DTPA and M1=M3>CaCl2 DTPA, respectively.
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关 键 词: | M1 M3 CaCl2 DTPA sequential extraction cobalt and nickel. |
收稿时间: | 1996/5/28 0:00:00 |
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