Peanut Shell Case Study

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Witek-Krowiak et al., (2010) researched on the use of peanut shell to remove heavy metals from water solution. Cu (II) and Cr (III) ions were the heavy metals in this research, using Langmuir, Freundlich, Redlich–Peterson and Sips models to examine data gotten from the tests. The preparation of the bio sorbent material (peanut shell) was prepared by washing with pipe and refined water for about 1-2hrs to remove dirt and colour, the washed peanut shells were dried in an oven for a day then mashed to particles size less than 30μm. The sampling for the tests was done in batch mode, taking into forethought the issue of initial pH, initial biomass concentration and temperature. Various concentrations of the metals in water solution ranging from …show more content…
The investigation took into consideration the implication of contact time, initial concentration, pH and temperature on the adsorption process. The absorbent (TFS-CE) was prepared using graft copolymerization of hydroxyethylmethacrylate on shells of the tamarind fruit with the aid of N-N’-methylenebisacrylamide for crosslinking. Using batch method, concentrated solutions containing 100mg of TFS-CE was added to samples of water solution containing Cu (II) ions (50cm3 volume) with concentration level of 25-300 mg.dm-3, the initial pH value was adjusted using a pH meter. The mixture was agitated at 200rpm using a temperature monitored water bath shaker. The solvent was filtered out after equilibrium and tested for Cu (II) ions concentration using the Atomic absorption spectrometer. Data analysis was carried out using pseudo-second-order model and Arrhenius and Eyring equations. The adsorption process was efficient, endothermic, and followed the Langmuir isotherm model with TFS-CE having maximum adsorption capacity of 64.1mg.g-1 at temperature of 300K and pH of

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