Bioprocessing optimization for efficient simultaneous removal of lead and chromium by Gracilaria corticata seaweed biomass

The goal of the current research is to identify the possible usage of biosorbent, Gracilaria Corticata (Red Algae), used as an edible seaweed mostly in India is now used in abatement of lead & chromium from an aqueous solution. Batch scale experimental study was conducted to know equilibrium studies, kinetics & thermodynamics behavior of biosorption. The impact of several constraints like agitated time, biosorbent size, pH and dosage, initial concentration of metals, temperature of an aqueous solution were studied. The statistical optimization analysis was also done to generate response surfaces for the sample showing highest uptake capacity using response surface methodology by applying central composite design technique. It is observed that biosorption studies follow pseudo 2nd order kinetic model. The thermodynamic constraints showed biosorption of lead & chromium on the biomass was a spontaneous & endothermic process. As a result of the work showed the suggested bio sorbent could be an actual biomaterial for the elimination of lead ions rather than chromium from contaminated solutions.