AKTİF KARBON-POLİVİNİL ALKOL KOMPOZİT KÜRECİKLERİ İLE SENTETİK ATIKSUDAN CR(VI) GİDERİMİ
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 N2 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.
Keywords
Cr(VI) adsorption, Activated carbon, Polyvinyl alcohol composite beads.
References
- Abechi, S.E., C.E. Gimba, C.E. Uzairu, A. and Dallatu, Y.A. (2013). Preparation and Characterization of Activated Carbon from Palm Kernel Shell by Chemical Activation, Research Journal of Chemical Sciences 3(7), 54-61.
- Aggarwal, D., Goyal, M. and Bansal, R.C. (1999). Adsorption of Chromium by Activated Carbon from Aqueous Solution, Carbon 37(12), 1989-1997.
- Babel, S. and Kurniawan, T.A. (2004). Cr(VI) Removal from Synthetic Wastewater using Coconut Shell Charcoal and Commercial Activated Carbon Modified with Oxidizing Agents and/or Chitosan, Chemosphere 54(7), 951-967.
- Chang,Y. H., Hsieh,K. H. and Chang F.C. (2009). Removal of Hg2+from Aqueous Solution using a Novel Composite Carbon Adsorbent, Journal of Applied Polymer Science 112 (4), 2445-2454.
- Chingombe, P., Saha, B. and Wakeman, R.J. (2005). Surface Modification and Characterisation of a Coal-Based Activated Carbon, Carbon 43(15), 3132-3143.
- Choi, H. D., Cho, J. M., Baek, K., Yang, J. S. and Lee, J. Y. (2009). Influence of Cationic Surfactant on Adsorption of Cr(VI) onto Activated Carbon, Journal of Hazardous Materials 161(2-3), 1565- 1568.
- Costa, V.C., Costa, H.S., Vasconcelos, W.L., Pereira, M.M.O., Rodrigo, L. and Mansur, H.S. (2007) Preparation of Hybrid Biomaterials for Bone Tissue Engineering, Materials Research 10(1), 21- 26, doi:10.1590/S1516-14392007000100006.
- Khezami, L. and Capart, R. (2005). Removal of chromium(VI) from Aqueous Solution by Activated Carbons: Kinetic and Equilibrium Studies, Journal of Hazardous Materials 123(1-3), 223-231.
- Mohan, D. and Pittman Jr., C.U. (2006) Activated carbons and low cost adsorbents for remediation of tri- and hexavalent chromium from water, Journal of Hazardous Materials B137(2), 762-811.
- Mohan, D., Singh, K. and Singh, V. (2005). Removal of Hexavalent Chromium from Aqueous Solution using Low-cost Activated Carbons Derived from Agricultural waste Materials and Activated Carbon Fabric Cloth, Industrial Engineering Chemistry Research 44(4), 1027-1042.