Journal
ECOLOGICAL ENGINEERING
Volume 37, Issue 10, Pages 1589-1594Publisher
ELSEVIER
DOI: 10.1016/j.ecoleng.2011.04.005
Keywords
Nostoc linckia; Spent biomass; Immobilization; Biosorption; Reactive dye; RSM
Funding
- Council of Scientific and Industrial Research (CSIR), New Delhi
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Potential of spent biomass of a cyanobacterium, Nostoc linckia HA 46, from a hydrogen bioreactor was studied for biosorption of a textile dye, reactive red 198. The waste biomass was immobilized in calcium alginate and used for biosorption of the dye from aqueous solution using response surface methodology (RSM). Kinetics of the dye in aqueous solution was studied in batch mode. Interactive effects of initial dye concentration (100-500 mg/L), pH (2-6) and temperature (25-45 degrees C) on dye removal were examined using Box-Behnken design. Maximum adsorption capacity of the immobilized biomass was 93.5 mg/g at pH 2.0, initial concentration of 100 mg/L and 35 degrees C temperature, when 94% of the dye was removed. Fourier transform infrared (FT-IR) studies revealed that biosorption was mainly mediated by functional groups like hydroxyl, amide, carboxylate, methyl and methylene groups present on the cell surface. (C) 2011 Elsevier B.V. All rights reserved.
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