Anti-algal activity of palladium oxide-modified nitrogen-doped titanium oxide photocatalyst on Anabaena sp. PCC 7120 and its photocatalytic degradation on Microcystin LR under visible light illumination

Xiaoxin Wang, Jingtao Zhang, Wuzhu Sun, Weiyi Yang, Jiaojiao Cao, Qi Li, Ying Peng, Jian Ku Shang

Research output: Contribution to journalArticlepeer-review

Abstract

Blue algae blooms could cause the indiscriminate killing of fish/invertebrates in water and the destruction of the local ecological equilibrium. The release of cyanotoxins by blue algae cells could kill livestock and cause various health problems to human beings. The highly effective photocatalytic disinfection of Anabaena sp. PCC 7120 as a representative blue algae specie under visible light illumination was demonstrated on a visible-light-activated palladium oxide-modified nitrogen-doped titanium oxide (TiON/PdO) nanoparticle photocatalyst. The large release of substances in blue algae cells, such as chlorophyll a and various ions, and severe damages on their cell wall/membrane clearly demonstrated the photocatalytic disinfection on blue algae by TiON/PdO nanoparticles under visible light illumination was an irreversible process. TiON/PdO nanoparticles also demonstrated a highly efficient photocatalytic degradation of a typical cyanotoxin, Microcystin LR, under visible light illumination. Thus, the photocatalytic treatment by TiON/PdO nanoparticles could effectively disinfect blue algae and degrade cyanotoxins under visible light illumination at the same time, which makes it attractive as an environmentally friendly and cost-effective alternative to current blue algae treatment practices.

Original languageEnglish (US)
Pages (from-to)437-444
Number of pages8
JournalChemical Engineering Journal
Volume264
DOIs
StatePublished - Mar 5 2015
Externally publishedYes

Keywords

  • Anabaena sp. PCC 7120
  • Microcystin LR
  • Photocatalytic disinfection and degradation
  • TiON/PdO nanoparticles
  • Visible light

ASJC Scopus subject areas

  • Chemistry(all)
  • Environmental Chemistry
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering

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