Adsorption of Toxic Zinc by Functionalized Lignocellulose Derived from Waste Biomass: Kinetics, Isotherms and Thermodynamics

Heavy metals pollution receives worldwide attention due to great toxicity, significant bio-accumulation and non-biodegradability. Adsorption is a promising technique for removing heavy from wastewater. of zinc (Zn(II)) aqueous solution was investigated by functionalized lignocellulose derived fallen leaves. Alkalized (AC), xanthated (XC) carboxylated (CC) were characterized Fourier transform infrared spectrum (FTIR), X-ray photoelectron spectroscopy (XPS) scanning electron microscopy (SEM). The effect sorbent dosage, pH, sorption time initial Zn(II) concentration on single-factor experiment. Sorption kinetics, isotherms thermodynamics examined reveal mechanism. capacity removal rate remarkably depend experimental variables. onto AC, XC CC well described the pseudo second order kinetics Langmuir isotherm. process fast, reaching equilibrium at 30 min. maximum 46.49 mg/g, higher than that other reported sorbents. Thermodynamic parameters indicate spontaneous process. mechanism majorly attributed surface complexation. This work shows feasibility toxic locally available biomass, providing sustainable approach wastewater treatment.