| 土壤水溶性有机物质的吸附、氧化和复合反应 |
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| 引用本文： | DING Chang-Pu. 土壤水溶性有机物质的吸附、氧化和复合反应[J]. 土壤圈, 1995, 5(2): 171-178 |
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| 作者姓名： | DING Chang-Pu |
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| 作者单位： | InstituteofSoilScience,AcademiaSinica,P.O.Box821,Nanjing210008,China |
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| 基金项目： | *1Project supported by the National Natural Science Foundation of China. |
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| 摘 要： | A greater part of water-soluble organic substances,accounting for 60-70% of the total,could be adsorbed by soils,which included strongly and weekly reducing substances,positively and negatively charged substances and substances containing amido.There existed a tendency of decrease in adsorption of the negatively charged organic substances by the soil from South China to North China,with expression as Coulombian adsorption.A simulatneous reduction of iron and manganese appeared with clear voltammertric behaviours upon oxidation of water-soluble organic substances,Complexation of organic ligands with ferrous iron and manganous manganee was proved by differential pulse voltammetric method,with disappearance of oxidation peaks of ferrous iron and manganous manganese at 0.00 V and 0.35 V and occurrence of Fe^2 -complex and Mn^2 -complex at 0l75 V and 1.2V respectively,whose peak potentials shifted backward.
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| 关 键 词： | 土壤成分 水溶性有机物 吸附 氧化 配位作用 络合 |
Adsorption, oxidation and complexion of water-soluble organic substances in soils |
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| DING Chang-Pu. Adsorption, oxidation and complexion of water-soluble organic substances in soils[J]. Pedosphere, 1995, 5(2): 171-178 |
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| Authors: | DING Chang-Pu |
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| Affiliation: | InstituteofSoilScience,AcademiaSinica,P.O.Box821,Nanjing210008,China |
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| Abstract: | A greater part of water-soluble organic substances,accounting for 60-70% of the total,could be adsorbed by soils,which included strongly and weekly reducing substances,positively and negatively charged substances and substances containing amido.There existed a tendency of decrease in adsorption of the negatively charged organic substances by the soil from South China to North China,with expression as Coulombian adsorption.A simulatneous reduction of iron and manganese appeared with clear voltammertric behaviours upon oxidation of water-soluble organic substances,Complexation of organic ligands with ferrous iron and manganous manganee was proved by differential pulse voltammetric method,with disappearance of oxidation peaks of ferrous iron and manganous manganese at 0.00 V and 0.35 V and occurrence of Fe^2 -complex and Mn^2 -complex at 0l75 V and 1.2V respectively,whose peak potentials shifted backward. |
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| Keywords: | adsorption complexation oxidation voltammetric behaviour water-solube organic substances |
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