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Received June 7, 2012
Accepted October 17, 2012
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Evaluation of physical properties and adsorption capacity of regenerated granular activated carbons (GACs)
Water Research Center, Korea Institute of Water and Environment, Korea Water Resources Corporation, 462-1, Jeonmin-dong, Yusung-gu, Daejeon 305-730, Korea 1Department of Civil Engineering, Kyungnam University, Changwon 631-701, Korea
nspark@kwater.or.kr
Korean Journal of Chemical Engineering, April 2013, 30(4), 891-897(7)
https://doi.org/10.1007/s11814-012-0179-9
https://doi.org/10.1007/s11814-012-0179-9
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Abstract
The objectives of this study were to evaluate the variation in physical properties and investigate the adsorption capacity after regeneration of granular activated carbon (GAC). A correlation analysis was conducted to examine the relationship between the iodide number and loss rate. The experimental results showed that the loss rate of regenerated carbon should be related to the usage time of GAC. Physical properties including the effective size and uniformity coefficient were similar to those of virgin GAC. This result indicates that the function of GAC as an adsorption medium may be recovered completely. Although the iodine number and specific surface area of the regenerated GAC were smaller than those of virgin GAC, the cumulative pore volume of the former was larger. The removal efficiency of organic matter from the regenerated GAC column was equal to or slightly higher than that from the virgin GAC column. Consequently,_x000D_
regeneration may increase the number of mesopores which are responsible for the removal of organic matter.
Keywords
References
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Barrett EP, Joyner LG, Halenda PP, J. Am. Chem. Soc., 73, 373 (1951)
Standard methods for the examination of water and wastewater, 21st Ed., APHA, AWWA, and WEF, Washington (2005)
Summers RS, Hopper S, Hong S, GAC Precursor Removal Studies, ICR Manual for Bench- and Pilot-Scale Treatment Studies, EPA 814-B-96-003, USEPA, Office of Water (1996)
Knappe DRU, Snoeyink VL, Roche P, Prados MJ, Bourbigot MM, Water Res., 31(11), 2899 (1997)
San Miguel G, Water Res., 35(11), 2740 (2001)
Pilard M, Water Science and Technology-Water Supply., 13(3/4), 1 (1995)
Steven DL, San Migule G, Graham NJD, J. Am. Water Works Assoc., 94, 109 (2002)
