Use of a novel food waste for the removal of some pollutants from aqueous solution by biosorption method

This work aims to contribute researchs that has been focused on biosorption. Therefore, to cleanse aqueous solution in terms of Pb+2 and diclofenac sodium with using of green chickpea shells. Necessary optimum conditions are identified, kinetic and isoterm studies made in dependent temperature conditions. Biosorption of Pb+2 and green chickpea shell, optimum point observed as, Pb+2 ion concentration 300 ppm, temperature 40 celcius degree, stirring speed 120 rpm, biosorbent dosage 0.1 g/L. On the other hand, biosorption of diclofenac sodium and green chickpea shell, optimum initial point observed as, ion concentration 300 ppm, temperature 45 celcius degree, stirring speed 120 rpm, biosorbent dosage 0.1 g/L. As a result of these studies, obtained kinetic datas used for pseudo first order, pseudo second order, intra-particle diffusion model, speed parameters and correlation coefficients calculated. According to value of correlation coefficients, kinetic model detected. Isotherm datas used for Langmuir and Freundlich model examples. On the other hand, termodynamic parameters (ΔHº, ΔSº and ΔGº) have been calculated. In this study, biosorption of green chickpea shell and Pb+ and diclofenac sodium, two of them are observed as pseudo first order kinetic model studies. The other observation is, speed of biosorption is controlled by intra-particle diffusion and film diffusion. According to isoterm results, this biosorption were well described by Langmuir equilibrium isotherm equation and maximum biosorption capacities for Pb+2 and diclofenac sodium is respectively, 30.8 mg/g and 15.5 mg/g. Furthermore, to research reusing of biosorbent, desorption of biosorbent and some desorbents with examined. In the light of these experimental studies, cleanse aqueous solution in terms of Pb+2 and diclofenac sodium, green chickpea shells can be using as an alternative way with its low cost.