Restriction of pesticidal movement in contaminated soil and water

Abstract

Studies on restriction of pesticidal movement in contaminated soil and water are reported here. Sorption isotherms could be well described by the Freundlich equation form for all the three materials. Sorption of malathion on SAS-I and SAS-II has been found to be higher than that on SAS-III whereas desorption is less in case of SAS-III. Thermodynamic parameters for sorption have also been calculated to predict the mechanism of sorption. The thermodynamic studies suggest exothermic and physicochemical nature of sorption process. The FTIR analysis and thermodynamic studies exhibit the possibility of hydrogen bonding between the substrate and the pesticide molecule. It has been found that varying the sorptive properties of synthetic aluminosilicates results in immobilization of pesticides in a contaminated soil and protection of soil and water by using the aluminosilicates as pesticide carrier in slow release formulations.