Fabrication of New Hyper-Cross-linked polymer for Efficient Heavy metal Adsorption from Industrial Wastewater

Abstract

New Hyper cross-linked polymer (HCP) of Resorcinol (1, 3-dihydroxybenzol) “R-HCP” is synthesized using Friedel-Craft Reaction for the removal of cadmium metal ions from industrial wastewater. Real industrial wastewater samples are used to evaluate the adsorption capability of R-HCP. Fabricated R-HCP is characterized through Fourier transform infrared spectroscopy (FTIR), Scanning electron microscopy (SEM), Transmission electron microscopy (TEM), X-ray diffraction analysis (XRD), EDX (Energy dispersive x-ray spectroscopy) and BET (Brunauer–Emmett–Teller). The BET surface area of R-HCP is 221.5848m2g− 1.Through salt addition method, the point of zero charge (PZC) was also determined, and its value is 2.0 pH. The greatest adsorption value of 93% was obtained at pH 10 with 0.5 g of adsorbent, 9-minute contact time and favors exothermic reaction. Langmuir, Freundlich and Temkin isotherms were studied and results shows that Freundlich model is the best fit. Adsorption kinetics investigation shows that it follows pseudo first order kinetic model. Study of the effect of interfering ions including calcium, magnesium, sodium, and potassium demonstrate the decrease in adsorption capacity to little extent. R-HCP can be recycled and have regeneration capacity which is novel and distinguished feature of this adsorbent.