The 3 - Glycidoxypropyltrimethoxysilane ( GPTMS ) deco rated magnetic more - aluminosilicate shell Na ( Si A1 ) 06.XH2O / NiFe_04 structures were hydrothermally prepared and were well characterized by different analysis methods . The XRD patterns were truly proved the formation of the aluminosilicate layer on the surface of the magnetic cores . In addition to the TGA curve which implied on the presence of the GPTMS organic segment , nitrogen adsorption - desorp tion isotherms demonstrated that the final sample has high specific surface area . The products were incredibly able to remove the toxic lead and cadmium ions from the waste waters . Furthermore , the mechanism of the sorption and the role of GPTMS in enhancing the sorption capacity