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Copper removal in solution by sawdust: kineticand thermodynamic study

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Journal of Materials and Environmental Sciences

Volume 9, Issue 12, 2018, Pages 3167-3180

Copper removal in solution by sawdust: kinetic and thermodynamic study

T. CHOUCHANE, A. Boukari, A. Bendjama, O. Khireddine, S. chibani

Abstract: This study presents the results obtained when okoumé sawdust is used for the removalof copper contained in wastewater.

The tests show that one gram of sawdust can fix29.56 mg of copper, according to the Langmuir model with kinetics of the pseudo firstorder where the time of the pseudo equilibrium is reached after 40 minutes of agitation.The elimination is envisaged in batch mode, at 20 ° C, a stirring speed of 200 rpm, atpH value of 4.4 and a particle size between 500 ? Ø < 700?m. Measured results alsoreveal that external diffusion controls the speed of the overall process of adsorption anddiffusion into the pores is not the only mechanism limiting kinetics. The thermodynamicstudy shows that this sorption is spontaneous , exothermic and that no changes havebeen made in the structure of the sawdust

Keywords : Cooper, adsorption, sawdust, water, pollution

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