Abstract
In this study, composite carbon beads were prepared at different mass ratios of powdered activated carbon, polyvinyl alcohol and glutaraldehyde. The beads were used as adsorbent in Cr(VI) removal from synthetic wastewater. The surface area of the synthesized beads were analyzed by N 2 adsorption (BET) and pore structure was visualized by scanning electron microscopy. Cr (VI) adsorption experiments were conducted at room temperature under conditions of 5 g.l -1 adsorbent dose, pH 3.0 and 120 rpm shaking rate. Results showed that, depending on composition, composite beads were 1.4-2.1 times more effective in Cr(VI) removal with respect to raw activated carbon whose Cr(VI) removal capacity and extent were determined as 3.61 mg.g -1 and 18%, respectively. The enhanced efficacy of Cr(VI) removal was attributed to the increase in the number of hydroxylic functional groups as well as the change in pore size distribution.
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