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Killing Effects of Hydroxyl Radical on Algae and Bacteria in Ship’s Ballast Water and on Their Cell Morphology

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Abstract

So far there is no an effective method for fast killing of algae and bacteria in the course of conveying ship’s ballast water. With a physical method of strong electric-field discharge, O2 in air and H2O in seawater are ionized and dissociated and then dissolved into seawater to generate •OH radicals. In the experimental system of 10 t/h, the algae and bacteria are rapidly killed using •OH radicals with the low •OH concentration of 0.7 mg/L within only 6 s, and D-2 ballast water discharge standard of IMO is realized. Under fluorescence microscope, cell morphological changes such as the disruption of cell membrane, sometimes to the point of cell lysis, has taken place when cells are exposed to a killing dose of •OH.

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Acknowledgments

This work was supported by the Major Project of National Science and Technology Support Program (Grant No. 2006BAC11B06) from the Ministry of Science and Technology, and Chang Jiang Scholar Program from the Ministry of Education of China.

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Authors and Affiliations

  1. Environmental Engineering Institute, Physics Department, Dalian Maritime University, Dalian, 116026, Liaoning, China

    Mindong Bai, Zhitao Zhang, Xiaohong Xue, Xianli Yang, Liusan Hua & Dan Fan

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  1. Mindong Bai
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  2. Zhitao Zhang
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  3. Xiaohong Xue
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  4. Xianli Yang
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  5. Liusan Hua
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Correspondence to Zhitao Zhang.

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Bai, M., Zhang, Z., Xue, X. et al. Killing Effects of Hydroxyl Radical on Algae and Bacteria in Ship’s Ballast Water and on Their Cell Morphology. Plasma Chem Plasma Process 30, 831–840 (2010). https://doi.org/10.1007/s11090-010-9252-5

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