title: Removal and recovery of lead (Pb2+) from industrial effluent using indigenous and tailor-made Aureobasidium sp. RBSS-303.
abstract: The objective of this study was to assess the removal and recovery of Pb-II from industrial wastewater using a locally isolated strain of Aureobasidium sp. RBSS-303. The initial Pb2+ concentration of 600 mg/L resulted in maximum uptake capacity (Qmax 235.1±0.3 mg/g). The biosorbent revival was attained by contacting with HCl (0.01 M), with 75.3% recovery of Pb2+. The Freundlich isotherm best explains the Pb2+ sorption performances. Maximum adsorption distribution coefficient of 1,309.6 mg metal/mL was observed at initial Pb2+ concentration value of 100 mg/L. Evaluation of nine kinetic models showed the removal rate of Pb2+ was reliant on diffusion control pseudo-second-order and saturation-mixed-order kinetic models with a high correlation coefficient value (R=0.99). Fourier transform infrared spectroscopy analysis showed the major contribution of -NH2 and -CN ligands of Aureobasidium sp. RBSS-303 in the sorption phenomenon of Pb2+. The biosorption assays carried out with effluent of the paint industry showed 76.8% efficiency for Pb2+ removal by the candidate biosorbent, regardless of the complex composition of the industrial effluent.
authors.affiliation: Department of Chemistry, Government College University, Faisalabad, Pakistan E-mail: yousafkamran73@yahoo.com.
authors.forename: Kiran
authors.initials: K
authors.lastname: Aftab
authors.affiliation: Industrial Biotechnology Division, National Institute for Biotechnology and Genetic Engineering (NIBGE), Jhang Road, Faisalabad P.O. Box 577, Pakistan.
authors.forename: Kalsoom
authors.initials: K
authors.lastname: Akhtar
authors.affiliation: Department of Chemistry, Government College University, Faisalabad, Pakistan E-mail: yousafkamran73@yahoo.com.
authors.forename: Fozia
authors.initials: F
authors.lastname: Anjum
mesh_terms: D001203:Ascomycota / Q000378:metabolism*; D007220:Industrial Waste / Q000032:analysis; D007854:Lead / Q000378:metabolism*; D014865:Waste Disposal, Fluid / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000378:metabolism*
chemical_list: D007220:Industrial Waste; D014874:Water Pollutants, Chemical; D007854:Lead