Ultrasonic inactivation of Microcystis aeruginosa in the presence of TiO₂ particles

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• 作者：Kazuaki Ninomiya¹ ; Chiaki Ogino² ; Shinya Kawabata³ ; Kentaro Kitamura³ ; Teruya Maki⁴ ; Hiroshi Hasegawa⁴ ; Nobuaki Shimizu¹ ; ^{nshimizu@t.kanazawa-u.ac.jp}
• 关键词：Ultrasound ; Titanium dioxide ; Disinfection ; Microcystis aeruginosa ; Hydroxyl radicals
• 刊名：Journal of Bioscience and Bioengineering
• 出版年：2013
• 出版时间：August, 2013
• 年：2013
• 卷：116
• 期：2
• 页码：214-218
• 全文大小：647 K

文摘

This is the first study to demonstrate that Microcystis aeruginosa, a typical algal bloom-forming cyanobacterium, can be effectively inactivated by ultrasound (US) irradiation in the presence of titanium dioxide (TiO₂) particles as a sonocatalyst. When a culture broth of M.?aeruginosa was ultrasonically irradiated for 15?min in the presence of 0.5?g/mL of TiO₂ particles 2?mm in diameter, the cell survival ratio was 0.13, which was significantly lower than that in the case of US irradiation alone (0.87). Moreover, regrowth of M.?aeruginosa in the culture was also inhibited for 10 days following ultrasonic disinfection in the presence of TiO₂ particles for 15?min.