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重金属污染对典型湿润富铁土上钾素行为的影响
作者姓名:TU Cong  ZHENG Chun-Rong  CHEN Huai-Man
作者单位:[1]LaboratoryofEnvironmentalScienceofPlants,FacultyofHorticulture,ChibaUniversity,Matsudo648,Matsudo-city,Chiba271-8510(Japan) [2]TheSynthesisResearchCentreofChineseEcosystemResearchNetwo,FacultyofHorticulture,ChibaUniversity,Matsudo648,Matsudo-city,Chiba271-8510(Japan)
基金项目:*1Project supported by the National Natural Science Foundation of China (Nos. 49631010 and 49771048), China Postdoctor Science Foundation, and the Laboratory of Material Cycling in Pedosphere, the Chinese Academy of Sciences.
摘    要:Difference of montmorillonite(Mt),illite(It) and kaolinite(Kt) in lead sorption characteristics and the effects of amorphous Fe and Al oxide coatings on the characteristics were experimentally sutdied with logistic model.The sorption curves had sigmoid feature due to use of acetate-type buffer solution.With the model the sorption process could be divided into four stages and the sorption characteristics at the stages were discussed.The results showed that,after Mt,It and Kt were coated by amorphous Fe oxide,their maximum sorption capacity(MSC) and percentage of high-SSC concentration scope(HCS) of Pb^2 increased markedly,but the specific sorption capacity(SSC) decreased.with regard to effects of amorphous Al oxide coating,except for It Al,the SSC of other samples showed a downtrend,despite that their MSC remained unchanged.Eventually,the gray correlation degrees to Pb^2 sorption for different physicochemical characteristics of the clay minerals were indicated to be higher for hydronium,zero point of surface charge and hydroxy,but lower for specific surface area.density of surface charge and amount of surface charges.

关 键 词:粘土矿物  重金属污染    吸附作用  蒙脱石  伊利石  高岭石  逻辑模型  金属氧化物

Effect of heavy metal pollution on potassium behavior in Typic Udic Ferrisol
TU Cong,ZHENG Chun-Rong,CHEN Huai-Man.Effect of heavy metal pollution on potassium behavior in Typic Udic Ferrisol[J].Pedosphere,2000,10(1):21-30.
Authors:TU Cong  ZHENG Chun-Rong and CHEN Huai-Man
Institution:Laboratory of Material Cycling in Pedosphere, Institute of Soil Science, the Chinese Academy of Sciences, P. O. Box 821, Nanjing 210008 (China);Laboratory of Material Cycling in Pedosphere, Institute of Soil Science, the Chinese Academy of Sciences, P. O. Box 821, Nanjing 210008 (China);Laboratory of Material Cycling in Pedosphere, Institute of Soil Science, the Chinese Academy of Sciences, P. O. Box 821, Nanjing 210008 (China)
Abstract:Difference of montmorillonite (Mt), illite (It) and kaolinite (Kt) in lead sorption characteristics and the effects of amorphous Fe and Al oxide coatings on the haracteristics were experimentally studied with logistic model. The sorption curves had sigmoid feature due to use of acetate-type buffer solution. With the modelthe sorption process could be divided into four stages and the sorption characteristics at the stages were discussed. The results showed that, after Mt, It and Kt were coated by amorphous Fe oxide, their maximum sorption capacity (MSC) and percentage of high-SSC concentration scope (HCS) of Pb2+ increased markedly but the specific sorption capacity (SSC) decreased. With regard to effects of amorphous Al oxide coating,except for It+Al, the SSC of other samples showed a downtrend, despite that their MSC remained unchanged.Eventually, the gray correlation degrees to Pb2+ sorption for different physicochemical characteristics of the clay minerals were indicated to be higher for hydronium, zero point of surface charge and hydroxy, but lower for specific surface area, density of surface charge and amount of surface charges.
Keywords:clay mineral  lead sorption  logistic model  metal oxide
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