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Item Description Dugan, Gordon L. en_US Fujioka, Roger S. en_US Lau, L. Stephen en_US Takei, Gerald H. en_US Gee, Henry K. en_US McParland, Terra L. en_US Chu, Holly M. en_US 2008-10-16T01:32:32Z 2008-10-16T01:32:32Z 1995-01 en_US
dc.identifier.citation Dugan GL, Fujioka RS, Lau LS, Takei GH, Gee HK, McParland TL, Chu HM. 1995. Extending the effective life of the GAC used to treat well water: Phase II of evaluative study at Mililani. Honolulu (HI): Water Resources Research Center, University of Hawaii at Manoa. WRRC project report, 95-07. en_US
dc.description.abstract Phase II is a continuation of the Phase I study to explore means of extending the effective life of the granular activated carbon (GAC) used in three central Oahu plants established by the Honolulu Board of Water Supply for the removal of volatile organic compounds: TCP, DBCP, and EDB. The Phase II study only concentrated on the Mililani GAC treatment plant, which did not have a measurable concentration of EDB. Isotherms were developed for TCP, which were approximately two orders of magnitude higher than DBCP in Mililani well water, but the results were questionable due to relatively light TCP losses by volatilization. Fourteen laboratory dynamic filtration tests (minicolumn tests) were conducted, eight using a bituminous-based GAC (used in BWS' full-scale treatment plants) and six using lignite-based GAC. The lignite-based GAC significantly outperformed the bituminous-based GAC, requiring 24% less carbon to remove a unit amount of TCP. Aeration treatment effectively removed TCP and DBCP, but neither aeration nor GAC treatment appeared to appreciably remove natural background organic compounds. en_US
dc.description.sponsorship Board of Water Supply City and County of Honolulu Grant/Contract No. C09012 en_US
dc.format.extent viii + 95 pages en_US
dc.language.iso en-US en_US
dc.publisher Water Resources Research Center, University of Hawaii at Manoa en_US
dc.relation.ispartofseries WRRC Project Reports en_US
dc.relation.ispartofseries 95-07 en_US
dc.subject water treatment en_US
dc.subject carbon filters en_US
dc.subject organic pesticides en_US
dc.subject contamination en_US
dc.subject well water en_US
dc.subject atomic absorption spectrophotometry en_US
dc.subject mass spectroscopy en_US
dc.subject granular activated carbon en_US
dc.subject minicolumn carbon analysis en_US
dc.subject EDB en_US
dc.subject DBCP en_US
dc.subject TCP en_US
dc.subject Mililani wells en_US
dc.subject Mililani water treatment plant en_US
dc.subject central Oahu en_US
dc.subject Hawaii en_US
dc.subject gas chromatography en_US
dc.subject.lcsh Carbon, Activated. en_US
dc.subject.lcsh Mililani (Hawaii) en_US
dc.subject.lcsh Water -- Purification -- Adsorption -- Hawaii -- Oahu. en_US
dc.subject.lcsh Water quality management -- Hawaii -- Oahu. en_US
dc.title WRRCPR No.95-07 Extending the Effective Life of the GAC Used to Treat Well Water: Phase II of Evaluative Study at Mililani en_US
dc.type Report en_US
dc.type.dcmi Text en_US

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