Treatment of Simulated Ballast Water Using Combined Photocatalysis and Ozonation Process

Dong Hai Wu; Ran Zhang; Hong You; Guang Hua Lu; Zhen Hua Yan; Qiu Hong Lin

doi:10.4028/www.scientific.net/AMR.864-867.1478

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 864-867Treatment of Simulated Ballast Water Using...

Treatment of Simulated Ballast Water Using Combined Photocatalysis and Ozonation Process

Abstract:

The combined photocatalysis and ozonation (UV/Ag-TiO₂+O₃) process has been investigated for its potential use for ballast water treatment by using Dunaliella salina (D. salina) as an indicator microorganism. Inactivation curves were obtained, and the mechanism was studied. Compared to individual unit processes, the combined UV/Ag-TiO₂+O₃ tests yield enhanced inactivation efficiency. Scanning electron microscopy (SEM) measurements showed that presence of O₃ during UV/Ag-TiO₂ exposure expedited the destruction of cell structure, which was further confirmed by the formation of malondialdehyde (MDA) and decrease in chlorophyll-a (chl-a) concentration. The results suggest that UV/Ag-TiO₂+O₃ was efficient for inactivation of D. salina in simulated ballast water, and the accelerated destruction of cell structure was an important reason for the enhanced inactivation efficiency.

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Periodical:

Advanced Materials Research (Volumes 864-867)

Pages:

1478-1481

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.864-867.1478

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Online since:

December 2013

Authors:

Dong Hai Wu*, Ran Zhang, Hong You, Guang Hua Lu, Zhen Hua Yan, Qiu Hong Lin

Keywords:

Ballast Water, Dunaliella salina, Inactivation Mechanism, UV/Ag-TiO₂+O₃ Process

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