Enhanced lead ( Pb2+) adsorption using chitosan coated sugar baggase ash composite materials
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linhnm@hcmute.edu.vnKeywords:
Sugar bagasse charcoal, chitosan, lead (Pb2 ), adsorption, heavy metal removalAbstract
In recent years, toxic pollutants in industrial wastewater are seriously considered as one of the environmental problems due to the heavy metals present in it. Chitosan and sugar bagasse ash are the well-known biosorbents due to their low cost, available and effective in the adsorption process. In this study, the composite biosorbent was prepared by mixing chitosan and sugar bagasse ash prepared by microwaving at a ratio of 1: 5 (ASB-CBs) in acid condition. Adsorbents were characterized by SEM analysis method and FTIR infrared spectra. The parameters affecting the Pb (II) and Cd (II) adsorption such as pH, adsorption time, a dose of adsorbent was studied by running the batch experiments. Research data show that the optimal pH for the biosorption process is 5.0. Experimental data is described by the Freundlich equation. A thermodynamic process is also studied in which the negative free Gibbs energy indicated the metal ions adsorption on the ASB-CBs was spontaneous and endothermic nature.
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