earticle

영어

The acute toxicity assessment of new algicides, TD49 and TD53, to the marine ecological system was conducted. The toxicity assessment used Ulva pertusa Kjellman and 3 species that represent the marine ecological system, and the results were compared by E(L)C50, NOEC and PNEC. In the acute toxicity assessment using the Ulva, the E(L)C50, NOEC and PNEC of TD53 were 1.65 μM, 0.08 μM and 1.65 nM, and those of TD49 were 0.18 μM, 0.63 μM and 0.18 nM, respectively. In assessment using S. costatum, D. magna and P. olivaceus, EC50 of TD53 showed 1.53 μM to S. costatum, 0.61 μM, and 2.14 μM, respectively. Indicating that D. magna is most sensitive. The calculated NOEC and PNEC to D. magna was 0.25 μM and 6.10 nM. E(L)C50 of TD49 to the three species were 0.34 μM, 0.68 μM, and 0.58 μM, respectively. The PNEC value was lowered as more kinds of species were employed as the subjects due to application of lower uncertainty factors. Also, a little difference in the chemical structures of the algicides showed significantly different sensitivity and specificity to the toxicity of the employed species.