Eco-Engineered Low-Cost Carbosorbent Derived from Biodegradable Domestic Waste for Efficient Total Chromium Removal from Aqueous Environment: Spectroscopic and Adsorption Study

• DOI: 10.46488/nept.2024.v23i02.032
• Publication Date: 2024-06-03T13:07:01Z
• Authors: Vandana Saxena; Ashish Kumar Singh; Atul Srivastava; Anushree Srivastava
• Keywords: Q1-390; chromium, bio-adsorption, biodegradable waste, groundwater; Science (General); Environmental effects of industries and plants; TD194-195

Chromium contamination in water bodies poses severe risks to both the environment and human health. This research introduces an innovative solution this challenge by creating a vapor-activated carbosorbent from biodegradable household waste. The efficacy of adsorbent removing total chromium through batch methods aqueous solutions was investigated. Surface analysis using scanning electron microscopy (SEM) exhibited porous structure, while Fourier-transform infrared spectroscopy (FTIR) identified distinct functional groups on surface. point zero charge (PZC), determined at 6.95, revealed adsorbent’s surface chemistry. Impressively, synthesized significant adsorption capacities 23.08 mg.g-1 for Cr(III) 24.84 Cr(VI) under optimal conditions. Langmuir isotherm model illustrated monolayer mechanism aligned with pseudo-second-order kinetic model, confirming chemisorption. Thermodynamic disclosed favorable spontaneous adsorption. Negative ΔG° values affirmed spontaneity, exothermic nature process signified positive ΔH° value, indicating heat release. Increased randomness solid-liquid interface, indicated ΔS° underscored enhanced affinity between adsorbate. study exemplifies potential as efficient sustainable remedy chromium-contaminated bodies.