Study of Cd Leaching Regularity in Meadow Black Soil

In the indoors soil pillar to simulate leaching,this article studied the leaching regularity of Cd in meadow black soil.The test result showed that the leaching quantity of Cd increased with the increasing leaching quantity.In the condition of soil solution leaching,the leaching quantity of Cd decreased.In the condition of humic acid leaching,the leaching quantity of was inhibited.Contrarily,the leaching quantity of Cd was promoted in the condition of EDTA leaching.The leaching quantity of Cd increased with the increasing humic acid and EDTA concentration.In different salt solution leaching,the leaching quantity of Cd increased.The strong weak order to affect Cd was : CaCl2MgSO4KClNaCl.In the condition of acidity,with the raising up of pH,the leaching quantity of Cd was diminishing.The leaching quantity of Cd in continuous leachine was more than the leaching quantity of Cd in batch leachine.These conclusions can predict the possibilities of water pollution effectively and take positive meature to protect water environment.