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瀬戸内海における防汚性殺生物剤トリフェニル(オクタデシルアミン)ホウ素の生態学的リスク評価.
Ecological risk assessment of an antifouling biocide triphenyl (octadecylamine) boron in the Seto Inland Sea, Japan.
PMID: 32658685 DOI: 10.1016/j.marpolbul.2020.111320.
抄録
本研究では,トリフェニル(オクタデシルアミン)ボロン(TPB-18)の予測無影響濃度(PNEC)を導出し,TPB-18を含むトリフェニルボラン(TPB)の発生状況を瀬戸内海における生態学的リスク評価のために調査した.藻類増殖阻害性、甲殻類固定化性、生殖毒性を試験し、魚類を対象とした毒性試験を実施し、TPB-18の急性・慢性毒性を評価し、PNECを作成した。毒性の最小値は0.30μg/Lであり,藻類Chaetoceros gracilisの72時間無観察影響濃度(NOEC)で決定した.種の感度分布法を用いたNOECから導き出された有害濃度(HC)の5パーセンタイルは0.059μg/Lであり、PNECは0.0059μg/Lであった。一方、瀬戸内海で採取した海水中の最高濃度は0.00034μg/Lであり、TPB-18の生態リスクは現時点では低いことが示唆された。
In this study, we derived the predicted no-effect concentrations (PNEC) for triphenyl (octadecylamine) boron (TPB-18) and investigated the occurrence of triphenylboranes (TPBs), including TPB-18, for ecological risk assessment in the Seto Inland Sea, Japan. We tested algal growth inhibition, crustacean immobilization, and reproductive toxicity and performed toxicity tests in fish to assess acute and chronic toxicity and generate the PNEC for TPB-18. The minimum toxicity value was 0.30 μg/L, as determined by the 72-h no-observed-effect concentration (NOEC) for the alga Chaetoceros gracilis. The 5th-percentile of hazardous concentration (HC), derived from NOECs using the species sensitivity distributions approach, was 0.059 μg/L, which indicated the PNEC of 0.0059 μg/L. In comparison, the highest concentration in seawater sampled from the Seto Inland Sea was 0.00034 μg/L, suggesting that the ecological risks posed by TPB-18 are currently low.
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