Chitosan impregnated Ca-alginate: a new hybrid material for removal of uranium from potable water

Novel sorbent, chitosan impregnated calcium alginate (Cal-Alg-Chi) bead was developed to sorb uranium from potable water without compromising water quality parameters. The uptake study in batch mode, showed more than 98% sorption of uranium in the concentration range of 0.1–50 µg mL^?1. Cal-Alg-Chi beads, reduced the concentration of uranium below 15 ng mL^?1 from 100 to 450 ng mL^?1 in groundwater collected from effected regions in India. Sorption isotherm followed Langmuir model and maximum sorption capacity was evaluated as 36.04 mg g^?1. The sorption was endothermic with ΔG ⁰ value of ?9.76 kJ mol^?1 and kinetics followed pseudo-second order rate law.