The degradation of microcystin-LR using doped visible light absorbing photocatalysts

Douglas Graham, Horst Kisch, Linda A. Lawton, Peter K J Robertson*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

31 Citations (Scopus)

Abstract

Microcystins are one of the primary hepatotoxic cyanotoxins released from cyanobacteria. The presence of these compounds in water has resulted in the death of both humans and domestic and wild animals. Although microcystins are chemically stable titanium dioxide photocatalysis has proven to be an effective process for the removal of these compounds in water. One problem with this process is that it requires UV light and therefore in order to develop effective commercial reactor units that could be powered by solar light it is necessary to utilize a photocatalyst that is active with visible light. In this paper we report on the application of four visible light absorbing photocatalysts for the destruction of microcystin-LR in water. The rhodium doped material proved to be the most effective material followed by a carbon-modified titania. The commercially available materials were both relatively poor photocatalysts under visible radiation while the platinum doped catalyst also displayed a limited activity for toxin destruction.

Original languageEnglish
Pages (from-to)1182-1185
Number of pages4
JournalChemosphere
Volume78
Issue number9
Early online date06 Jan 2010
DOIs
Publication statusPublished - Feb 2010

Keywords

  • Cyanotoxin
  • Microcystin
  • Visible photocatalyst
  • Water treatment

ASJC Scopus subject areas

  • Environmental Chemistry
  • Chemistry(all)

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