Optimization and Modelling for the Remediation of Brilliant Green Dye and Ni2+ ions from Water Using Advanced gC3N4/PVA@ Alginate Bio-Polymeric Hydrogel Beads

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DOI: 10.23880/jeesc-16000119

Volume 2, Issue 2

Abstract

This work offers an innovative technique for creating a ternary composite adsorbent material using ultrasonic synthesis that consists of exfoliated graphitic carbon nitride nanosheets, polyvinyl alcohol, and alginate beads. FTIR, FE-SEM-Mapping, XPS analysis, and X-ray diffraction were among the characterizations that verified the ternary composite beads's successful synthesis and structure. Nickel ion removal and brilliant green (BG) dye adsorption from an aqueous solution were examined using the ternary composite beads' adsorption capabilities, and the influence of pH and the adsorbate's dose was assessed and optimized with response surface methodology (RSM). According to the data, the sorption phenomena are dependent on both the starting concentration of Ni2+ & BG dye and pH, with a maximal sorption capacity of 56.8 and 52.2 mg/g for BG dye and Ni2+ ions, respectively, at 318K. The Langmuir sorption model provides a good description of the chemisorption process that eliminates Ni2+ ions & BG dye, which follows pseudo-second-order kinetics. Additionally, a tenable mechanism for the adsorption of Ni2+ ions & BG dye onto the surface of gC3N4/PVA@ alginate ternary composite beads is proposed. More importantly, without exhibiting any discernible decrease in sorption ability, gC3N4/PVA@ alginate beads frequently used at least five cycles and showed remarkable regeneration ability. The characteristics of the ternary beads and their synthesis method offer a cost-effective and feasible wastewater remediation option.

Keywords: gC3N4/PVA@ Alginate Beads; Ni2+; BG Dye Remediation; (RSM): Response Surface Methodology

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