Reusable porous Na(Si2Al)O6.xH2O/NiFe2O4 structure for selective removal of heavy metals from waste waters

摘要

The 3-Glycidoxypropyltrimethoxysilane (GPTMS) decorated magnetic more-aluminosilicate shell Na(Si₂Al)O₆.xH₂O/NiFe₂O₄ 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-desorption 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 wastewaters. Furthermore, the mechanism of the sorption and the role of GPTMS in enhancing the sorption capacity of the structures were comprehensively discussed.