Application of Raw and Alkaline-modified Coconut Shaft as a Biosorbent for Pb2+ Removal

Application of Raw and Alkaline-modified Coconut Shaft as a Biosorbent for Pb2+ Removal

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The sorption capacity of untreated and alkaline-treated coconut shaft biosorbents for the removal of Pb2+ from aqueous solution was investigated in batch experiments.Effects of contact time, biosorbent dose, initial metal concentration, and pH on the sorption capacity were investigated.Optimum Pb2+ removal of 17.6 and 22.1 mg/g by untreated and alkaline-treated biomass was achieved at an initial Audio Jack metal concentration of 150 mg/L, a biomass dose of 0.

7 g, a contact time of 80 min, and a pH of 4.0.The sorption data fitted well into the Langmuir isotherm, while kinetic modeling of the data from untreated biomass indicated conformity with the Lagergren pseudo-first-order model, whereas data from the treated biomass fit well with the Elovich model.FT-IR results gave indications of possible functional groups on the cell walls of the coconut shaft, including alcohols, amines, carboxylic acids, ester, Bike Accessories - Bells and ethers.Thus, alkaline treatment of the coconut shafts enhanced the biosorption ability of Pb2+ onto the coconut shaft biomass.