Effect of pH Change of Soil on the Elution of Toxic Inorganic Pollutants from Contaminated Soils

Abstract

Elution amount of toxic inorganic pollutants from soil were investigated using the adsorption isotherm. Concentration of toxic inorganic pollutants in liquid phase will be affected by the kind of hazardous inorganic contaminants, and it is not affected by character of soil. If hydrogen ion concentration becomes 10 fold, concentration of cadmium will be increased about 6 fold, and that of lead will be increased about 10 fold. Lead concentration may be easily affected by pH change of soil. The pH of soils will affect results of elution test. Therefore, pH measurement after elution test is necessary to assess contamination level and the data can be used for quality control of elution test. This suggestion must be very significant to improve public method.