Author/Authors :
Khaskheli, Mazhar I Government College University Hyderabad, Pakistan , Chandio, ZaheerAhmed Department of Chemistry - Shaheed Benazir Bhutto University - Shaheed Benazirabad, Pakistan , Khokhar, Faiz M University of Sindh - Jamshoro, Pakistan , Jatoi, Wahid B Shah Abdul Latif University - Khairpur Mir’s, Pakistan , Memon, Abdul G University of Sindh - Jamshoro, Pakistan , Shaista, K Molecular Biology (Genetics) Laboratory - Medical Research Centre - LUMHS - Jamshoro, Pakistan , Khokhar, Laeeq A. K University of Sindh - Jamshoro, Pakistan , Channa, Abdul M University of Sindh - Jamshoro, Pakistan
Abstract :
In present study, arsenic(As)uptake potential of an eco-friendlyMorus alba(mulberry) leavebiomass was analyzed. Surface properties of the sorbent and its affinities for arsenic ions withrespect to temperature were studied. Freundlich, D-R, Florry-Huggins and Halsey isotherms werefound to be similar with recorded experimental data. Maximum sorption capacities 2.82 mg/g and4.93 mg/g were calculated for As(III) and As(V) at pH-6 and pH-4,respectively. The energyvalues of the sorption 3.31-5.89 (<8)kJ/mole indicated the physisorption. The applicability ofHalsey isotherm supported the heteroporosity of the biomass. Mechanism of the reaction was bestexplained by pseudo first order rate, Morris-Weber and Richenberg equations. Intra-particlediffusion as well as surface sorption was noticed during the study. Equilibrium was achieved up to120 minutes. Thermodynamically, sorption reaction was endothermic and spontaneous in nature.Maximum recoveries of As(III) and As(V) were 83.3% and 95.52%,respectively observed with 1M H2SO4.
Keywords :
Morus alba , Arsenic , Sorption , Isotherm
