Park, C. -B. Baik, S. Kim, S. Choi, J. -W. Lee, S. -H. Kim, Y. J. 2024-01-20T01:33:04Z 2024-01-20T01:33:04Z 2021-09-01 2017-05 1735-1472 https://pubs.kist.re.kr/handle/201004/122788 This study is focused on the use of ultrasound to disrupt Microcystis aeruginosa growth, with consideration for the gap between laboratory-scale experiment and field application. Laboratory-scale sonication systems with different frequencies (i.e., 20, 584, 869, and 1137 kHz) for 30 min at 10-min intervals were conducted to investigate their effectiveness at disrupting M. aeruginosa growth. The toxicological effect of sonicated M. aeruginosa including microcystin-LR was also evaluated using a Daphnia magna acute toxicity test. High frequencies, 869 and 1137 kHz, resulted in more than a 60% reduction of cells after 30 min of sonication. Low to middle frequencies, 20 and 584 kHz, only showed a 30% reduction of cells after 30 min of sonication. High frequencies also led to the inactivation of cell proliferation during M. aeruginosa regrowth, due to cellular destruction and finally cell death. However, the concentration of microcystin-LR and the potential adverse effects of M. aeruginosa on D. magna could not be controlled using ultrasonic frequencies. Therefore, our results suggest that ultrasonic frequencies between 869 and 1137 kHz are effective at controlling bloom formation in M. aeruginosa and the regrowth of M. aeruginosa after sonication, but not at controlling microcystin-LR concentrations and its adverse effects on D. magna. Consequently, a combined purification technology to reduce the cyanotoxins such as microcystin-LR, rather than ultrasonic frequency alone, will be needed to control M. aeruginosa growth and its toxicity levels in the aquatic environment. English SPRINGER The use of ultrasonic frequencies to control the bloom formation, regrowth, and eco-toxicity in Microcystis aeruginosa Article 10.1007/s13762-016-1224-8 1 INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY, v.14, no.5, pp.923 - 932 INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY 14 5 923 932 N scie scopus 000400051500001 2-s2.0-85018643290 Environmental Sciences Environmental Sciences & Ecology Article DAPHNIA WATER SONOCHEMISTRY CYANOBACTERIA SONICATION ALGAE POWER LAKE LR Daphnia acute toxicity Laboratory-scale sonication systems Microcystis aeruginosa Microcystin-LR Ultrasonic frequency