Abstract
A batch system has been used for removal of chloride, sulfate and sodium pollutantsfrom wastewater of Daura refinery. The fine grained resin lewatit was used in this study,batch experiments were performed to examine the effects amount of resin and mixing timeon the removal efficiency and residual of pollutants. The kinetics and thermodynamics ofadsorption were also analyzed. Various thermodynamic parameters such as enthalpy (ΔH◦),free energy (ΔG◦) and entropy (ΔS◦) showed that the adsorption was endothermic,spontaneous and feasible. The removal efficiency of sulfate, chloride and sodium is (91%,88%, 82%), respectively. The optimum mixing time is (12min) for sulfate and sodium, and(14 min) for chloride. Sulfate adsorption on lewatit fitted well to the pseudo-second-orderkinetic model, but adsorption of chloride and sodium on lewatit behaves to the pseudofirst-order kinetic model.
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