Fabrication, Microstructure and Colloidal Stability of Humic Acids Loaded Fe3O4/APTES Nanosorbents for Environmental Applications

Nowadays, numerous researches are being performed to formulate nontoxic multifunctional magnetic materials possessing both high colloidal stability and magnetization, but there is a demand in the prediction of chemical water solutions. Herein, series silica-coated magnetite nanoparticles (MNPs) has been synthesized via sol-gel method with without establishing an inert atmosphere, then it was tested terms humic acids (HA) loading applied as coating agent. The influence ambient conditions on microstructure, HA different MNPs established. XRD patterns show that content stoichiometric Fe3O4 decreases from 78.8% 42.4% at atmosphere synthesis, respectively. most striking observation shift isoelectric point pH ~7 3, increasing reaching up reversal zeta potential sign covered completely by molecules. data can be used predict capacity for polyanions. help understand way materials’ development complexation ability insolubility silica gel pave develop novel, efficient magnetically separable adsorbent contaminant removal.