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KMID : 1024520000090060463
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Journal of the Environmental Sciences
2000 Volume.9 No. 6 p.463 ~ p.468
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Effect of Ultraviolet Radiation on the Mortality Rate of the Marine Dinoflagellate Amphidinium Carteras Causing a Red Tide
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Kim Sam-Hyeok
Choi Chil-Nam
Cha Wol-Suk
Cheong Kyung-Hoon
Jung Oh-Jin
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Abstract
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Ther effect of UV on the mortality rate of toxic dinoflagellate Amphidinium Carterae causing a red tide in the coastal area of korea was investigated in the batch and continuous-scale reactor equipped with ultraviolet irradiation-apparatus. Degussa P(sub)25 titanium oxide, a photocatalyst proved to be effective of the mortality of Amphidinium Carterae supplied with photocatalyst and UV radiation were greater than 95% in 2 minutes of UV radiation and the rate were higher than that by UV-radiation without titanium dioxide in the batch and continuous-flow scale reactor, The mortality time of Amphidinium Carterae increased with the cell density under UV-illumination in the batch scale reactor. The mortality rate in the density of $5.010^4$ cell/mL at the same experimental condition was more than 90% in 4 minutes in the continuous flow scale reactor. The percentage of 99.90.1% of Amphidinium Carterae in the density of $0.510^4$ cells/mL was died in 20 minutes when the phytoplankton was illuminated with UV-radiation without photocatalyst.
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KEYWORD
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alge mortality rate, Amphidinium carterae, phytocatalyst, red tide, UV-illumination
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