the detoxification of methamidophos as an organophophorus insecticide on the magnetite (fe3o4) nanoparticles/ag-nay faujasite molecular sieve zeolite (fmsz) composite

this work undertakes the study of the detoxification reactions of o, s-dimethyl phosphoramidithioate (methamidophos) as an organophophorus insecticide on the 14.7 wt% magnetite (fe3o4) nanoparticles/ag-nay faujasite molecular sieve zeolite (fmsz) composite. the influence of solvent (methanol, acetonitrile and n-hexane) on the detoxification potential of composite was investigated. for this survey, in the first step, sodium type-y (nay) zeolite was synthesized by hydrothermal method (hm). then, ag-nay zeolite was prepared from nay zeolite by ion-exchange method (iem). in the next step, fe3o4 nanoparticles (nps) were incorporation and deposited on the ag-nay zeolite structure by using precipitation method (pm). the synthesized samples were characterized by sem, edax and xrd techniques. the gc-fid and ir analyses results demonstrated that about 99% of methamidophos was detoxified (adsorbed) via this composite at n-hexane solvent after 10 h. on the other hand, the results for the acetonitrile and methanol solvents were lower. it seems that a nonpolar solvent transfer to the reactive surface site on the composite without occupying and blocking of these sites.