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Regeneration of ortho-chlorophenol-exhausted activated carbons with liquid water at high pressure and temperature

A study was undertaken of the regeneration of three activated carbons exhausted with ortho-chlorophenol. The regeneration process was carried out using liquid water at 623 K and 150 atm in the absence of oxygen. The efficiency of this procedure was analyzed by determining the rate and amount of orth...

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Bibliographic Details
Published in:Water research (Oxford) 2003-04, Vol.37 (8), p.1905-1911
Main Authors: Rivera-Utrilla, J, Ferro-Garcı́a, M.A, Bautista-Toledo, I, Sánchez-Jiménez, C, Salvador, F, Merchán, M.D
Format: Article
Language:English
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Summary:A study was undertaken of the regeneration of three activated carbons exhausted with ortho-chlorophenol. The regeneration process was carried out using liquid water at 623 K and 150 atm in the absence of oxygen. The efficiency of this procedure was analyzed by determining the rate and amount of ortho-chlorophenol adsorbed in successive adsorption–regeneration cycles. The present procedure showed a much greater efficiency than that reported for chemical and/or thermal regeneration. Effects of this regeneration on the adsorption kinetics, adsorption capacity and textural characteristics of the carbon were investigated. The increase in adsorption capacity of the regenerated carbon compared with that of the original carbon seems mainly due to the opening of porosity during the regeneration treatment.
ISSN:0043-1354
1879-2448
DOI:10.1016/S0043-1354(02)00552-3