Photocatalytic destruction of geosmin using novel pelleted titanium dioxide

Edmund Bellu, Linda A. Lawton, Peter K J Robertson

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)


Geosmin is produced by cyanobacteria and actinomycetes in surface waters. It causes undesirable earthy off-flavours in freshwater fish and is a major concern for the drinking water industry. This paper presents the first published study on the use of the novel pelleted Ti02 photocatalyst, Hombikat K01/C, for the removal of geosmin from water. Ti02 in pelleted form eliminates the requirement for the separation of the catalyst from the water following treatment which is normally the case with the widely used powdered catalysts. A laboratory reactor was designed to limit system loss since the compound adsorbs to a wide range of surfaces. Initial concentration, aeration rate and irradiation were evaluated. It was found that degradation of geosmin followed the Langmuir-Hinshelwood model. Elevated aeration had no effect on the photocatalytic removal of geosmin, but increasing irradiation was found to increase degradation rates. The catalyst proved effective within 10 min under optimum conditions. 

Original languageEnglish
Pages (from-to)384-388
Number of pages5
JournalJournal of Advanced Oxidation Technologies
Issue number2
Publication statusPublished - Jul 2008

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry


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