Adsorption of phenol on acid-treated slag wastes in waste water
نویسنده
چکیده
This study investigates the liquid-phase adsorption behavior of phenol form waste water by using slag, which is one of the solid wastes from steel refining process. This adsorption technique is one green process based on using the slag waste as adsorber for removing organic contaminants from waste water. First, the raw slag was chemically treated by different concentrations of sulfuric acid, and then the removal efficiencies of phenol by treated slag were examined at various pH values. The adsorption isotherms and adsorption kinetics show the adsorption performance of phenol on the treated slag adsorbers. Experimental results deliver the best removal efficiency of phenol on the slag can achieve at pH = 6−8. Two famous adsorption models, Freundlich and Langmuir equations, were adopted to analyze the liquid-phase adsorption behavior, showing good correlations to the experimental data. The merit of the present work is to shed some lights on (i) the treated slag displays a promising candidate as high-performance adsorber for organic removal, and (ii) the exhausted slag could be recycled and served as controlled low-strength material (CLSM). The LCSM not only removes organic compounds but also uses as fillers for construction, which opens novel application in environmental protection field.
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