Research on biological effectiveness of hydroxyl radicals killing marine red tide algae in ballast water

Cheng Chao; Bai Mindong; Zheng Qilin; Chen Cao; Meng Xiangying; Zhang Zhitao

doi:10.3969/j.issn.0253-4193.2016.02.013

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Cheng Chao, Bai Mindong, Zheng Qilin, Chen Cao, Meng Xiangying, Zhang Zhitao. Research on biological effectiveness of hydroxyl radicals killing marine red tide algae in ballast water[J]. Haiyang Xuebao, 2016, 38(2): 131-137. doi: 10.3969/j.issn.0253-4193.2016.02.013

Citation:

Cheng Chao, Bai Mindong, Zheng Qilin, Chen Cao, Meng Xiangying, Zhang Zhitao. Research on biological effectiveness of hydroxyl radicals killing marine red tide algae in ballast water[J]. Haiyang Xuebao, 2016, 38(2): 131-137. doi: 10.3969/j.issn.0253-4193.2016.02.013

Citation:

Cheng Chao, Bai Mindong, Zheng Qilin, Chen Cao, Meng Xiangying, Zhang Zhitao. Research on biological effectiveness of hydroxyl radicals killing marine red tide algae in ballast water[J]. Haiyang Xuebao, 2016, 38(2): 131-137. doi: 10.3969/j.issn.0253-4193.2016.02.013

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Research on biological effectiveness of hydroxyl radicals killing marine red tide algae in ballast water

doi: 10.3969/j.issn.0253-4193.2016.02.013

1.
College of Marine Engineering, Dalian Maritime University, Dalian 116026, China
2.
College of Environment and Ecology, Xiamen University, Xiamen 361005, China;Environmental Engineering Institute, Dalian Maritime University, Dalian 116026, China
3.
College of Environment and Ecology, Xiamen University, Xiamen 361005, China
4.
Environmental Engineering Institute, Dalian Maritime University, Dalian 116026, China

Received Date: 2015-06-09
Rev Recd Date: 2015-09-23

Abstract

Abstract

In this study, the three typical red tide species were chosen as the experiment algae and the inactivation was achieved by hydroxyl radials generated from a strong ionization discharge combined with hydrodynamic cavitations. The viability and integrity of the algae were determined by the fluorescence staining and Pulse Amplitude Modulation. The results suggest that a quick and complete loss of viability was achieved for three species after exposure to hydroxyl radical, for the Heterosigma akashiwo, Alexandrium tamarensem, Skelrtonema costatum which the density is 5.05×10⁴ cells/mL, 5.28×10⁴ cells/mL, 5.02×10⁴ cells/mL respectively, the lethal thresholds are 1.24 mg/L, 2.01mg/L, and 1.12 mg/L separately. Meanwhile Algal cells were deformed and shrunk after ·OH attack and chlorophyll content was degraded at the same time. The chlorophyll content decomposition rate reaches to 77%, 85% and 74% at the lethal thresholds. Above all, the use of hydroxyl radicals is an efficient method to kill red tide species in ballast water.
- hydroxyl radials,
- red tide algae,
- lethal thresholds

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References(21)

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