Biosorptive Decolorization of Basic Blue Using the Waste Biomass
The study addresses the bio sorption of Basic blue from aqueous solution using red seaweed Gracilaria corticata as adsorbent for equilibrium isotherm analysis in batch mode of operation. Many species of seaweed have been identified in the past as potent bio sorbents for waste-water treatment processes. For the first time Gracilaria corticata, a natural dead algal biomass served as a sorbent material potentially suitable for removal of Basic blue from aqueous solution. The effect of experimental parameters namely pH, initial dye concentrations and bio sorbent dosage in the percentage of decolourization of synthetic Basic blue dye solution were investigated and were found to be at the optimum. Both the initial sorbate solution and sorbent dose were found to favourably catalyse the sorption process. Langmuir, Freundlich, Redlich-Peterson and Toth model were investigated to monitor the adsorption behaviour of Gracilaria corticata. According to the Langmuir and Toth model, the Maximum Basic blue uptake of 95.41 mg/g and 90.99 mg/g was observed at pH 8 and at a temperature of 30○C.
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