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《Journal of Soil and Water Conservation》 2017-04
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Effects of Epigallocatechin Gallate(EGCG)on Migration of Al,Fe and Mn in Yellow Earth Under the Interactions of Concentrations and pH Values

ZHANG Junsi;YUAN Dagang;WENG Qian;ZHANG Chu;WANG Changquan;TU Junyu;DENG Yonggang;HE Gang;College of Resources,Sichuan Agricultural University;Yibin Soil and Fertilizer Station;  
The concentrations of Al,Fe and Mn in Yellow Earth under the leaching environment was analyzed,and the effects of Epigallocatechin Gallate(EGCG)on the migration of Al,Fe and Mn under the interactions of concentrations and pH values.A completely randomized experiment with two factors was carried out,in which 48 EGCG solutions combined from different concentrations and pH values was designed to leach the Yellow Earth discontinuously.The concentrations of Al,Fe and Mn in leaching solutions were measured to analyze the migration volumes and migration processes of Al,Fe and Mn.The results indicated that the migration volumes of Al,Fe and Mn in Yellow Earth varied significantly under the interactions of concentrations and pH values.The EGCG solution with high concentration and high pH value would facilitate the migration of Al and Fe,whose volumes were 180.24mg/L and 41.15mg/L,respectively.However,the EGCG solution with high concentration and low pH value would be conducive to the migration of Mn,whose volume was4.50mg/L.The migration volumes of the three elements under the different interactions of concentrations and pH values followed the order of AlFeMn.Generally speaking,the concentrations of Al and Mn in the leachate decreased gradually in the middle-late leaching stage.However,the Fe concentrations in the leachate first increased and then decreased in the leaching processes,as the EGCG solutions with middle concentration and high pH,high concentration and high pH,and high concentration and middle pH;whilethe Fe concentrations showed a significant rising trend,when the concentrations of EGCG interacted with a lower pH value.It is suggested that the leaching of EGCG has a positive effect on the treatment of soil Al/Mn toxicity in a certain degree,especially at the early stage of leaching.Whereas,EGCG could not be used to control Al/Mn toxicity in soil at the same time.
【Fund】: 国家自然科学基金项目(41372130)
【CateGory Index】: S153.6
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