期刊
INTERNATIONAL BIODETERIORATION & BIODEGRADATION
卷 65, 期 2, 页码 294-300出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ibiod.2010.11.015
关键词
Mucor indicus; Heavy-metal ions; Morphology; Adsorption kinetic; Adsorption isotherm
Biosorption characteristics of Pb+2 ions from aqueous solution were investigated using fungus Mucor indicus biomass treated with NaOH. Biosorption was measured as a function of biomass morphology, pH, biomass concentration, contact time, and metal concentration. The morphology of M. indicus biomass was manipulated towards filamentous or yeast-like forms. The highest and lowest biosorption capacities were observed for purely filamentous and yeast-like forms, respectively. Models of Langmuir, Freundlich, Temkin, and Scachard were applied to describe adsorption isotherm and fitted appropriately. Biosorption kinetics was successfully described using Ho's pseudo-second-order model. Maximum and minimum values of biosorption capacity of Pb2+ were 22.1 and 12.1 mg g(-1) for purely filamentous and yeast-like morphologies, respectively. Increasing pH resulted in higher biosorption of Pb+2 ions up to pH 5.5. Biosorption capacity of individual Pb+2 ions was reduced in the presence of other metal ions in bi- or multi-metal ion experiments. Metal ions adsorption by the biomass could be eluted effectively with HNO3. (C) 2010 Elsevier Ltd. All rights reserved.
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