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Chicken egg shells, collected from bakeries shops of Mardan division, KPK Pakistan and treated with different chemicals for leaching purpose. The sample was then characterized by BET surface area, SEM, FTIR and EDS techniques. Adsorption of some dicarboxylic acids (Oxalic acid and Malonic acids) are studied on treated and raw sample of chicken egg shells powder by kinetics and batch adsorption technique at different temperatures 20şC, 30şC and 40şC. The amount adsorbed of acids was determined by the method of titration. The removal of acids from wastewater was studied with respect to initial acids concentration, equilibrium time and different acid concentration manually. Intraparticle diffusion, Elovich and Bhangam models were used for analysis adsorption kinetics studies. For adsorption isotherm study Freundlich, Langmuir, Tempkin and Harkins-jura linear equation were used for the analyzing of investigated data and were found that all the models were best fitted for these data of adsorption.
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