MOBILIZATION OF LEAD AND CADMIUM INFLUENCED BY SOIL AMENDMENTSP. SENTHILVALAVAN, V. VINOTHKUMAR, R. SINGARAVEL AND R. PARTHASARTHIAbstract Activities such as mining and manufacturing and the use of synthetic products (especially chemical fertilizers and pesticides) result in heavy metal contamination of soil and water resources. The objectives of this research were to examine the effectiveness of soil organic and inorganic amendments on sorption or desorption Pb and Cd in soil and to explore the effects of soil amendments on soil physicochemical properties correlate with heavy metals (im) mobility on a contaminated soil under crop free environment. The effectiveness of different soil amendments viz., FYM, press mud, EDTA, lime, potassium humate and natural zeolite along with NPK fertilizers were tested for screening the best metal mobilizing and or immobilizing amendment for using in further field studies with hyper accumulating plant species. The experimental results revealed that application of 100 % RDF NPK plus EDTA mobilizing more DTPA extractable lead and cadmium in soil solution by charge specific chelation and cation exchange processes. Whereas 100 % RDF NPK plus FYM application showed lower soil available lead and cadmium by immobilization through influencing the soil physico-chemical properties. |