Abstract
In this study, SUZ-4 zeolite-carbon composites were synthesized by a one-step hydrothermal method with solid waste, silica fume (SF), aluminum ash (AA), and chitosan (CS), as raw materials. The composites were analyzed by XRD, SEM, FTIR and BET characterizations. The adsorption capacities of the composites for lead ions (Pb2+) and methyl orange (MO) from aqueous solutions were investigated. Based on the adsorption data, pseudo-second-order model and the Freundlich model were suitable to describe the adsorption process of Pb2+ on the composite, while the pseudo-second-order model and the Langmuir model were preferred to describe the adsorption process of MO on the composite. The maximum adsorption capacity of the composite for Pb2+ was 102.2 mg/g at pH=6, and that for MO was 488.3 mg/g at pH=3. The resulting composites have practical applications as adsorbents for wastewater treatment, thus achieving the goal of “waste for waste”.
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