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Effect of Modification of Granular Activated Carbon on Pb(II) Adsorption
Effect of Modification of Granular Activated Carbon on Pb(II) Adsorption
Journal of the Korean Chemical Society. 2011. Oct, 55(5): 896-899
Copyright © 2011, The Korean Chemical Society
  • Received : September 02, 2011
  • Accepted : September 07, 2011
  • Published : October 20, 2011
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About the Authors
Dae Ho Kim
Bo-Hye Kim
Alan G. MacDiarmid Energy Institute, Chonnam National University, Gwangju 500-757, Korea
ksyang@chonnam.ac.kr
Kap Seung Yang
Department of Polymer & Fiber System Engineering, Chonnam National University, Gwangju 500-757, Korea
ksyang@chonnam.ac.kr
Kwang Cheol Kang
Microfilter Co., Ltd, 162-1, Sansu, Deoksan, Jinchun, Chung-Buk 365-842, Korea
Yong-Kyun Lim
Microfilter Co., Ltd, 162-1, Sansu, Deoksan, Jinchun, Chung-Buk 365-842, Korea
Wonng Eui Lee
Department of Phamacology& Cosmetology, Kwangju Women’s University, 506-713, Korea

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EXPERIMENTAL
- Materials and characterizations
The base adsorbent used in the study was commercially available GAC made from coconut shell (A-GAC), whose mesh size ranges 12*30. The surface morphology of the GAC were analyzed by Scanning electron micrograph (SEM) using the S-4700 (Hitachi, Tokyo, Japan) and surface area and pore size distributions for the sample were measured by the Brunauer-Emmett-Teller (BET) method using Micrometrics (ASPS2020, USA). The surface functional groups of the samples were characterized by a mono-chromatized Al K α X-ray from X-ray photoelectron spectroscopy (XPS) (VG Scientific ESCALAB 250 Spectrometer). Inductively coupled plasma-atomic emission spectroscopy (ICP) was used to analyze heavy metal absorption using OPTIMA 4300 DV (perkin elmer, USA).
- Point of zero charge (PZC)9
To measure the PZC of the A-GAC sample, three different initial pH solutions were prepared using 0.1M HNO and 0.1 M NaOH; for example, pH=3.5, 6.5, and 11.5. NaNO, was used as the background electrolyte. For each initial pH, six containers were filled with 100 ml of the solution, and different amounts of carbon sample were added (0.05%, 0.1%, 0.5%, l%, 5%, and 10% by weight). The equilibrium pH was measured after 24 h.
- Modification of GAC
The GACs were deposited in a three-necked flask, equipped with stirrer, condenser, dropping funnel and heating mantle. The GACs (5 g) in 20 ml distilled water were treated with 1, 2, 3 N NaOH (5 g), respectively at 80 ℃ for 1 h to increase the formation of functional groups and porosity. The modified GACs were washed with deionized water and dried overnight at 80 ℃ in vacuum oven to produce modified ACs such as NaGAC1, NaGAC2, and NaGAC3.
- Adsorption measurements
Adsorption isotherms of the Pb ion were carried out in batches as follow. Salts used were Pb(NO 3 ) 2 for Pb(II) with a high degree of purity. Experiments were carried out using 250 mL of Pb ion aqueous solution containing 10 mgl -1 concentration and a constant modified GACs, in 300 mL Teflon bath at 20±1.5 ℃. At a given intervals, samples were filtered using 0.45 μm cellulose acetate filters and the content of remaining Pb ion was analyzed every 2 min by using ICP.
Acknowledgements
This work supported by the Components and Materials Technology Development Program of Ministry of Knowledge Economy (MKE).
References
International Program on Chemical Safety. 1988 Environmental Health Criteria World Health Organization Geneva
Ramahlo R. S. 1991 Tratamiento de Aguas Residuales Editorial Reverte, S.A. Barcelona
Saanchez-Poloand M. , Ruvera-Utrilla J. 2002 Environ. Sci. Technol. 36 3850 -    DOI : 10.1021/es0255610
Radovic L. R. , Moreno Castilla C. , Rivera Utrilla J. 2001 Chemistry and Physics of Carbon, Vol. 27 Marcel Dekker New York 227 -
Xiaolan Song , Hongyan Liu , Lei Cheng , Yixin Qu 2010 Desalination 255 78 -    DOI : 10.1016/j.desal.2010.01.011
Brunauer B. , Deming L. S. , Deming W. E. , Teller E. 1940 J. Am. Chem. Soc. 62 1723 -    DOI : 10.1021/ja01864a025
Kutics K. , Suzuki M. 1990 Adsorption of organics on surface modified activated carbon fibers 2nd Korea-Japan Symposium on Sep. Tech. Seoul, South Korea 395 -
Shimoda K. , Park J.-S. , Hinoki T. , Kohyama A. 2007 Appl. Surf. Sci. 253 9450 -    DOI : 10.1016/j.apsusc.2007.06.023
Noh J. S. S. 1990 Carbon 28 675 -    DOI : 10.1016/0008-6223(90)90069-B