Removal and determination of heavy metals in real samples andindustrial wastewater with nanosorbent

In this research, the effect of adding modifire such as nanoparticles and lihands for improvingthe performance of nanofiltration membrane made of polyether sulfone was investigated inlaboratory conditions. At first, the production of the primary membrane started with the phaseinversion method with a home made instrument. Dimethylacetamide has been used as a solvent,polyvinylpyrrolidone has been used to increase porosity and create holes, and graphene oxidesynthesized from graphite in the laboratory has been used to increase the hydrophilicity of themembrane. The membran was characterized with appripriate methids shch FTIR, XRD and SEM.The effective parametrs for improving the regection percentage such as amounts of modifire, pHand water flux was optimized. Composite membranes made of polyether sulfone,dimethylacetamide, polyvinylpyrrolidone and graphene oxide were investigated in terms of waterflux and heavy metal absorption. The concentration of heavy metal ions was determined withdiffrebtioal puls voltametry (DPV). It was observed the amounts of metal ions such as chromium,mercury, lead, copper and silver have been significantly adsorbed by the modified membran, butit also causes a decrease in the amount of passing water flux

کلیدواژه ها:

Polymeric membrane ، Nanofiltration ، Heavy metals ، Voltametry