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Effect of GAC characteristics on adsorption of organic pollutants

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The impact of the characteristics of granular activated carbon (GAC) on adsorption capacity and on the potential for polymerization of phenolic compounds on the surface of GAC in the presence of molecular oxygen is evaluated in this study. Adsorption isotherm data were collected for p-chlorophenol on five activated carbons; three manufactured from bituminous coal, one manufactured from lignite coal, and one manufactured from wood. These isotherms were collected under anoxic (absence of molecular oxygen) and oxic (presence of molecular oxygen) conditions. Higher extraction efficiencies of the carbons used in the oxic isotherms were obtained for the carbons that exhibited lower increases in capacities when compared to anoxic isotherms. Furthermore, no impact of the presence of oxygen on adsorption capacity was noted for the wood base carbon. Breakthrough curves developed for p-chlorophenol on the five carbons studied have shown tailing effects for the carbons that demonstrated differences in capacities under oxic and anoxic conditions whereas no tailing was noticed for the wood base carbon.
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Keywords: activated carbon; adsorption; isotherms; phenols

Document Type: Research Article

Publication date: 1993-01-01

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    Water Environment Research (WER) publishes peer-reviewed research papers, research notes, state-of-the-art and critical reviews on original, fundamental and applied research in all scientific and technical areas related to water quality, pollution control, and management. An annual Literature Review provides a review of published books and articles on water quality topics from the previous year.

    Published as: Sewage Works Journal, 1928 - 1949; Sewage and Industrial Wastes, 1950 - 1959; Journal Water Pollution Control Federation, 1959 - Oct 1989; Research Journal Water Pollution Control Federation, Nov 1989 - 1991; Water Environment Research, 1992 - present.
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