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 180.24 mg/L and 41.15 mg/L

respectively. However

the EGCG solution with high concentration and low pH value would be conducive to the migration of Mn

whose volume was 4.50 mg/L. The migration volumes of the three elements under the different interactions of concentrations and pH values followed the order of Al＞Fe＞Mn. 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; while the 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.