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pubmed-article:11346291pubmed:abstractTextLignite based granular activated carbon of 20x30 mesh size was used to investigate the extent of bioregeneration of phenol and 2,4-DCP in a batch system. The adsorption isotherm fits very well with the Freundlich isotherm and it is apparent that 2,4-DCP is more adsorbable than phenol. The degree of reversible adsorption for phenol and 2,4-DCP were 32.9 and 10.6 %, respectively. The low percentages of their reversibility meant that the adsorption phenomena of both phenol and 2,4-DCP were not fully physicosorption. The microorganisms can regenerate 31.4% (21.2 mg g(-1)) of GAC loaded with phenol and 14.3% (24.8 mg g(-1)) of GAC loaded with 2,4-DCP over a period of 7-10 days. The bioregeneration of phenols closely followed the first order kinetics with the rate constant of 0.046 day(-1) at initial phenol concentration of 100 mg l(-1) and biomass concentration of 20 mg l(-1) MLVSS. The rate constant was 0.021 day(-1) at initial 2,4-DCP concentration of 200 mg l(-1) and 200 mg l(-1) MLVSS. In addition, the increasing in initial concentration of biomass in the solution shortened the time required to reach the asymptotic limit on the bioregeneration but rendered little impact on the bioregeneration percentage.lld:pubmed
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pubmed-article:11346291pubmed:authorpubmed-author:IshibashiYYlld:pubmed
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pubmed-article:11346291pubmed:authorpubmed-author:Vinitnanthara...lld:pubmed
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pubmed-article:11346291pubmed:pagination339-44lld:pubmed
pubmed-article:11346291pubmed:dateRevised2007-3-21lld:pubmed
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pubmed-article:11346291pubmed:articleTitleQuantitative bioregeneration of granular activated carbon loaded with phenol and 2,4-dichlorophenol.lld:pubmed
pubmed-article:11346291pubmed:affiliationDivision of Environmental Technology, School of Energy and Materials, King Mongkut's University of Technology Thonburi, Bangmod, Bangkok, Thailand.lld:pubmed
pubmed-article:11346291pubmed:publicationTypeJournal Articlelld:pubmed