Preparation of negatively charged glass surface modified filter media and its purification performance in drinking water

The filtering material is the key to determine filtering effect, the study found that the soda lime glass has high negative zeta potential, hydroxylation of soda lime glass medium, and then using & gamma;-methylacryloxy propyl trimethoxysilane oxygen radicals silane (MPS) in three oxygen radicals silane coupling, and then the MPS of C=C key with C=C bond potassium salt of propyl methacry-late 3-sulfonate (SPM) polymer grafting modified filter material is prepared. The study shows that changing the amount of SPM can make the negative potential layer have different charges, and the potential can be as high as -148.19 mV. Under the condition of 50 mM and 1 mL/min, the graft -mod-ified filter media showed a better filtration effect on specific pollutants, and the removal rates of Fe3+, Mn2+ and NH4+ by 24-mesh graft-modified filter media were 62.18%, 71.53% and 61.85%, respec-tively. The removal rates of the above pollutants by 32-mesh grafted modified filter media can reach 85.72%, 87.49% and 79.69%, respectively. At the same time, the grafted modified filter media has good cycle stability, and the removal effect of 32-mesh modified filter media only decreased by 4.06% compared with the same period last year.