Nano-Sulphonated Poly (glycidyl methacrylate)-Hexamethyl Pararosaniline chloride novel composite adsorbent development for treatment of dichromate and permanganate contaminated waste water

Abstract

The nano-Sulphonated Poly (glycidyl methacrylate)-Hexamethyl Pararosaniline Chloride (Crystal Violet; CV) composite (CV-SPGMA) has been developed as a novel adsorbent for treatment of Dichromate and Permanganate Contaminated Waste Water for the first time. The innovative adsorbent has been developed by adsorption of CV dye from wastewater using nano-Sulphonated Poly (glycidyl methacrylate) (SPGMA) particles. The study investigated the impact of various adsorption parameters. The CV content was observed to be linearly increased by variations in the concentration of CV up to 200 mg/L where maximum content obtained; 174.6 mg/g. The equilibrium almost reached after 90 min. An endothermic nature of the CV adsorption process has been noticed where 178 mg/g CV content obtained at 80 °C. The CV content decreased from 240 mg/g to 46 mg/g with the SPGMA adsorbent dose increment from 5 to 40 mg. The pH of adsorption exhibited the most pronounced impact, with the highest CV content achieved at a pH of 10.0 corresponding to 190.4 mg/g. The reusability of the produced CV-SPGMA adsorbent was examined for consecutive adsorption–desorption cycles, revealing a loss of just 13% in its initial adsorption efficiency after 10 cycles. In addition, the alterations in the chemical structure and morphology caused by the development of CV-SPGMA composite were observed through the utilization of characterization techniques including Fourier-transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and energy-dispersive X-ray spectroscopy (EDAX). Finally, the developed CV-SPGMA composite adsorbent, for the first time, tested for the removal of Cr (VI) and Mn (VII) metal ions from dichromate and permanganate contaminated waters under mild adsorption conditions where shows seven folds affinity towards removal of the Cr (VI), 84.6 mg/g, than Mn (VII), 11.66 mg/g.