Abstract
ABSTRACTThe adsorption of 2,4,6-trichlorophenol (TCP) from an aqueous solution onto raw biomass (RB) and treated biomass (TB), obtained from municipal solid waste (MSW) in the city of Mostaganem, was investigated. The effects of pH and contact time on TCP adsorption were determined, and the chemical activation of natural biomass was performed using a phosphoric acid solution. The adsorption capacity was found equal to 78.18 mg/g and 93.38 mg/g for RB and TB, respectively. The Langmuir, Freundlich and Langmuir–Freundlich adsorption models were applied to describe the related isotherms. The Langmuir–Freundlich equation provided a very satisfactory description of TCP adsorption on both types of biomass. The kinetic study results showed that the adsorption of TCP onto both bio-sorbents can be described by the pseudo-second-order equation controlled by intra-particle diffusion. The thermodynamic constants obtained revealed that the process was spontaneous and exothermic.
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