| 施用碱稳定污泥污水土壤经γ-辐照后土壤溶液中Cu和Zn |
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| 作者姓名： | XU Ren-Kou JI Guo-Liang |
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| 作者单位： | Institute of Soil Science, the Chinese Academy of Sciences, P. O. Box 821, Nanjing 210008 (China);Institute of Soil Science, the Chinese Academy of Sciences, P. O. Box 821, Nanjing 210008 (China) |
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| 基金项目： | *1Project (Nos. 49401009 and 49471041) supported by the National Natural Science Foundation of China. |
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| 摘 要： | Soil samples collected from several acid soils in Guangdong, Fujian, Zhejiang and Anhui provinces of the southern China were employed to characterize the chemical species of aluminumions in the soils. The proportion of monomeric inorganic Al to total Al in soil solution was in the range of 19% to 70%, that of monomeric organic Al (Al-OM) to total Al ranged from 7.7% to 69%, and that of the acid-soluble Al to total Al was generally smaller and was lower than 20% in most of the acid soils studied. The Al-OM concentration in soil solution was positively correlated with the content of dissolved organic carbon (DOC) and also affected by the concentration of Al3+. The complexes of aluminum with fluoride (Al-F) were the predominant forms of inorganic Al, and the proportion of Al-F complexes to total inorganic Al increased with pH. Under strongly acid condition, Al3+ was also a major form of inorganic Al, and the proportion of Al3+ to total inorganic Al decreased with increasing pH. The proportions of Al-OH and Al-SO4 complexes to total inorganic Al were small and were not larger than 10% in the most acid soils. The concentration of inorganic Al in solution depended largely on pH and the concentration of total F in soil solution. The concentrat ions of Al-OM, Al3+, Al-F and Al-OH complexes in topsoil were higher than those in subsoil and decreased with the increase in soil depth. The chemical species of aluminumions were influenced by pH. The concentrations of Al-OM, Al3+, Al-F complexes and Al-OH complexes decreased with the increase in pH.
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| 关 键 词： | acid soil aluminum ion chemical species |
Chemical species of aluminum ions in acid soils |
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| XU Ren-Kou,JI Guo-Liang.Chemical species of aluminum ions in acid soils[J].Pedosphere,1998,8(2):127-133. |
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| Authors: | XU Ren-Kou and JI Guo-Liang |
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| Institution: | Institute of Soil Science, the Chinese Academy of Sciences, P. O. Box 821, Nanjing 210008, China. |
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| Abstract: | Soil samples collected from several acid soils in Guangdong, Fujian, Zhejiang and Anhui provinces of southern China were used to characterize the chemical species of Al ions in the soils. The proportion of monomeric inorganic Al to total Al in soil solution was in the range of 19% to 70%, that of monomeric organic Al (Al-OM) to total Al ranged from 7.7% to 69%, and that of the acid-soluble Al to total Al was generally smaller and was <20% in most of the acid soils studied. The Al-OM concentration in soil solution was positively correlated with the content of dissolved organic carbon (DOC) and also affected by the concentration of Al3+. The complexes of Al with fluoride (Al-F) were the predominant forms of inorganic Al, and the proportion of Al-F complexes to total inorganic Al increased with pH. Under strongly acid condition, Al3+ was also a major form of inorganic Al, and the proportion of Al3+ to total inorganic Al decreased with increasing pH. The proportions of Al-OH and Al-SO4 complexes to total inorganic Al were small and were not >10% in the most acid soils. The concentration of inorganic Al in solution depended largely on pH and the concentration of total F in soil solution. The concentrations of Al-OM, Al3+, Al-F and Al-OH complexes in topsoil were higher than those in subsoil and decreased with the increase in soil depth. The chemical species of Al ions were influenced by pH. The concentrations of Al-OM, Al3+, Al-F complexes and Al-OH complexes decreased with the increase in pH. |
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| Keywords: | acid soil aluminum ion chemical species |
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