Journal
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
Volume 45, Issue 3, Pages 967-972Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jtice.2013.09.012
Keywords
Mangifera indica; Langmuir; Freundlich; Chemical pretreatments; Kinetics
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Mangifera indica biomass was chemically pretreated to evaluate its Ni(II) and Co(II) uptake capacity from aqueous solutions. The adsorption characteristics of Ni(II) and Co(II) by M. indica were found dependent on pH, chemical pretreatments, initial concentrations of the metals and time. The M. indica biomass was pretreated using HCl, HNO3, H3PO4, NaOH, CH3COOH, C6H6, HCHO and H2O2. The maximum Ni(II) and Co(II) uptake was 131.5 mg/g at pH 6 and 114.6 mg/g at pH 5, respectively at 30 C with NaOH pretreated M. indica biomass. The equilibrium adsorption data was better fitted to Langmuir adsorption isotherm model and pseudo-second order model. (C) 2013 Taiwan Institute of Chemical Engineers. Published by Elsevier B.V. All rights reserved.
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