Kinetic,equilibrium and thermodynamic studies for the sorption of metribuzin from aqueous solution using banana peels,an agro-based biomass |
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Authors: | Atta ul Haq Jasmin Shah Muhammad Rasul Jan Saif ud Din |
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Institution: | 1. Department of Chemistry, Government College University, Faisalabad, Pakistanattaulhaqchem@yahoo.com;3. Institute of Chemical Sciences, University of Peshawar, Pakistan |
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Abstract: | Banana peels were employed for the removal of metribuzin from aqueous solution. Sorption in the batch mode was optimized regarding pH, contact time, sorbent dose, initial pesticide concentrations, and temperature. The sorption data were fitted to pseudo-first-order, pseudo-second-order, intraparticle diffusion, Elovich, and liquid film diffusion model, the pseudo-second-order exhibiting best fit (R2 = 0.9803). Of the four most common sorption isotherm models (Langmuir, Freundlich, Tempkin, and Dubinin–Radushkevich), the data followed the Langmuir isotherm with highest correlation. The maximum adsorption capacity was found to be 167 mg g?1. Gibbs free energy, enthalpy, and entropy showed that the sorption was exothermic and spontaneous. |
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Keywords: | metribuzin banana peels isotherms kinetics thermodynamics |
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