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Antifouling Biocide
The Experts below are selected from a list of 165 Experts worldwide ranked by ideXlab platform
Kazunori Fujii – 1st expert on this subject based on the ideXlab platform
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Spatial analysis of 4,5-dichloro-2-n-octyl-4-isothiazolin-3-one (Sea-Nine 211) concentrations and probabilistic risk to marine organisms in Hiroshima Bay, Japan.
Environmental Pollution, 2015Co-Authors: Kazuhiko Mochida, Toshimitsu Onduka, Takeshi Hano, Hideki Ichihashi, Haruna Amano, Hiroyuki Tanaka, Kazunori FujiiAbstract:Abstract We analyzed the spatial distribution of an Antifouling Biocide, 4,5-dichloro-2- n -octyl-4-isothiazolin-3-one (Sea-Nine 211) in the surface water and sediments of Hiroshima Bay, Japan to determine the extent of contamination by this Biocide. A quantitative estimate of the environmental concentration distribution (ECD) and species sensitivity distributions (SSDs) for marine organisms were derived by using a Bayesian statistical model to carry out a probabilistic ecological risk analysis, such as calculation of the expected potentially affected fraction (EPAF). The spatial distribution analysis supported the notion that Sea-Nine 211 is used mainly for treatment of ship hulls in Japan. The calculated EPAF suggests that approximately up to a maximum of 0.45% of marine species are influenced by the toxicity of Sea-Nine 211 in Hiroshima Bay. In addition, estimation of the ecological risk with a conventional risk quotient method indicated that the risk was a cause for concern in Hiroshima Bay.
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Toxicity of the Antifouling Biocide Sea-Nine 211 to marine algae, crustacea, and a polychaete
Fisheries Science, 2013Co-Authors: Toshimitsu Onduka, Daisuke Ojima, Kazuhiko Mochida, Kazunori FujiiAbstract:We evaluated the acute toxicity of the Antifouling Biocide Sea-Nine 211 to the algae Chaetoceros calcitrans , Dunaliella tertiolecta , Tetraselmis tetrathele , and Skeletonema costatum , the crustacea Tigriopus japonicus and Portunus trituberculatus , and the polychaete Perinereis nuntia . The algae, and especially the diatoms C . calcitrans and S . costatum , were sensitive to Sea-Nine 211 toxicity, with the average acute toxicity values being 0.32, 3.9, 1.6, 0.22, 1.6, 12, and 27 μg/l for C . calcitrans , D . tertiolecta , T . tetrathele , S . costatum , T . japonicus , P . trituberculatus , and P . nuntia , respectively. A sediment toxicity test for Sea-Nine 211 using the polychaete P . nuntia revealed demonstrated that the 14-day median lethal concentration was 110 μg/kg dry-wt sediment and that growth was the most sensitive indicator. The chronic toxicity values of Sea-Nine 211 for the diatoms C . calcitrans and S . costatum were within the range of reported Sea-Nine 211 concentrations in seawater in coastal Japan, and the toxicity values for P . nuntia were within the reported concentrations in sediment. Based on these results, Sea-Nine 211 may have toxic effects on some sensitive species residing in the coastal areas of Japan, but the ecological risk posed by Sea-Nine 211 would appear to be confined to a limited area of Japanese coastal waters.
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Toxicity of Degradation Products of the Antifouling Biocide Pyridine Triphenylborane to Marine Organisms
Archives of Environmental Contamination and Toxicology, 2013Co-Authors: Toshimitsu Onduka, Daisuke Ojima, Kazuhiko Mochida, Kazunori FujiiAbstract:We evaluated the acute toxicities of the main degradation products of pyridine triphenylborane (PTPB), namely, diphenylborane hydroxide (DPB), phenylborane dihydroxide (MPB), phenol, and biphenyl, to the alga Skeletonema costatum , the crustacean Tigriopus japonicus , and two teleosts, the red sea bream Pagrus major and the mummichog Fundulus heteroclitus . DPB was the most toxic of the degradation products to all four organisms. The acute toxicity values of DPB for S . costatum , T . japonicus , red sea bream, and mummichog were 55, 70, 100, and 200–310 μg/L, respectively. The degradation products were less toxic than PTPB to S . costatum and T . japonicus ; however, the toxicities of DPB and PTPB to the fish species were similar. We also examined changes in the inhibition of growth rate of S . costatum as well as the percentage of immobilization of T . japonicus as end points of toxicity of PTPB after irradiation of PTPB with 432 ± 45 W/m^2 of 290–700 nm wavelength light. After 7 days of irradiation with this light, the concentration of PTPB in the test solutions decreased markedly. A decrease in toxic effects closely coincided with the decrease in the concentration of PTPB caused by the irradiation. PTPB probably accounted for most of the toxicity in the irradiation test solutions. Because the concentrations of PTPB that were acutely toxic to S . costatum and T . japonicus were
Kazuhiko Mochida – 2nd expert on this subject based on the ideXlab platform
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ecological risk assessment of an Antifouling Biocide triphenyl octadecylamine boron in the seto inland sea japan
Marine Pollution Bulletin, 2020Co-Authors: Toshimitsu Onduka, Takeshi Hano, Kumiko Kono, Nobuyuki Ohkubo, Kazuhiko MochidaAbstract:Abstract 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 (HC5), 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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Spatial analysis of 4,5-dichloro-2-n-octyl-4-isothiazolin-3-one (Sea-Nine 211) concentrations and probabilistic risk to marine organisms in Hiroshima Bay, Japan.
Environmental Pollution, 2015Co-Authors: Kazuhiko Mochida, Toshimitsu Onduka, Takeshi Hano, Hideki Ichihashi, Haruna Amano, Hiroyuki Tanaka, Kazunori FujiiAbstract:Abstract We analyzed the spatial distribution of an Antifouling Biocide, 4,5-dichloro-2- n -octyl-4-isothiazolin-3-one (Sea-Nine 211) in the surface water and sediments of Hiroshima Bay, Japan to determine the extent of contamination by this Biocide. A quantitative estimate of the environmental concentration distribution (ECD) and species sensitivity distributions (SSDs) for marine organisms were derived by using a Bayesian statistical model to carry out a probabilistic ecological risk analysis, such as calculation of the expected potentially affected fraction (EPAF). The spatial distribution analysis supported the notion that Sea-Nine 211 is used mainly for treatment of ship hulls in Japan. The calculated EPAF suggests that approximately up to a maximum of 0.45% of marine species are influenced by the toxicity of Sea-Nine 211 in Hiroshima Bay. In addition, estimation of the ecological risk with a conventional risk quotient method indicated that the risk was a cause for concern in Hiroshima Bay.
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Toxicity of the Antifouling Biocide Sea-Nine 211 to marine algae, crustacea, and a polychaete
Fisheries Science, 2013Co-Authors: Toshimitsu Onduka, Daisuke Ojima, Kazuhiko Mochida, Kazunori FujiiAbstract:We evaluated the acute toxicity of the Antifouling Biocide Sea-Nine 211 to the algae Chaetoceros calcitrans , Dunaliella tertiolecta , Tetraselmis tetrathele , and Skeletonema costatum , the crustacea Tigriopus japonicus and Portunus trituberculatus , and the polychaete Perinereis nuntia . The algae, and especially the diatoms C . calcitrans and S . costatum , were sensitive to Sea-Nine 211 toxicity, with the average acute toxicity values being 0.32, 3.9, 1.6, 0.22, 1.6, 12, and 27 μg/l for C . calcitrans , D . tertiolecta , T . tetrathele , S . costatum , T . japonicus , P . trituberculatus , and P . nuntia , respectively. A sediment toxicity test for Sea-Nine 211 using the polychaete P . nuntia revealed demonstrated that the 14-day median lethal concentration was 110 μg/kg dry-wt sediment and that growth was the most sensitive indicator. The chronic toxicity values of Sea-Nine 211 for the diatoms C . calcitrans and S . costatum were within the range of reported Sea-Nine 211 concentrations in seawater in coastal Japan, and the toxicity values for P . nuntia were within the reported concentrations in sediment. Based on these results, Sea-Nine 211 may have toxic effects on some sensitive species residing in the coastal areas of Japan, but the ecological risk posed by Sea-Nine 211 would appear to be confined to a limited area of Japanese coastal waters.
Toshimitsu Onduka – 3rd expert on this subject based on the ideXlab platform
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ecological risk assessment of an Antifouling Biocide triphenyl octadecylamine boron in the seto inland sea japan
Marine Pollution Bulletin, 2020Co-Authors: Toshimitsu Onduka, Takeshi Hano, Kumiko Kono, Nobuyuki Ohkubo, Kazuhiko MochidaAbstract:Abstract 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 (HC5), 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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Spatial analysis of 4,5-dichloro-2-n-octyl-4-isothiazolin-3-one (Sea-Nine 211) concentrations and probabilistic risk to marine organisms in Hiroshima Bay, Japan.
Environmental Pollution, 2015Co-Authors: Kazuhiko Mochida, Toshimitsu Onduka, Takeshi Hano, Hideki Ichihashi, Haruna Amano, Hiroyuki Tanaka, Kazunori FujiiAbstract:Abstract We analyzed the spatial distribution of an Antifouling Biocide, 4,5-dichloro-2- n -octyl-4-isothiazolin-3-one (Sea-Nine 211) in the surface water and sediments of Hiroshima Bay, Japan to determine the extent of contamination by this Biocide. A quantitative estimate of the environmental concentration distribution (ECD) and species sensitivity distributions (SSDs) for marine organisms were derived by using a Bayesian statistical model to carry out a probabilistic ecological risk analysis, such as calculation of the expected potentially affected fraction (EPAF). The spatial distribution analysis supported the notion that Sea-Nine 211 is used mainly for treatment of ship hulls in Japan. The calculated EPAF suggests that approximately up to a maximum of 0.45% of marine species are influenced by the toxicity of Sea-Nine 211 in Hiroshima Bay. In addition, estimation of the ecological risk with a conventional risk quotient method indicated that the risk was a cause for concern in Hiroshima Bay.
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Toxicity of the Antifouling Biocide Sea-Nine 211 to marine algae, crustacea, and a polychaete
Fisheries Science, 2013Co-Authors: Toshimitsu Onduka, Daisuke Ojima, Kazuhiko Mochida, Kazunori FujiiAbstract:We evaluated the acute toxicity of the Antifouling Biocide Sea-Nine 211 to the algae Chaetoceros calcitrans , Dunaliella tertiolecta , Tetraselmis tetrathele , and Skeletonema costatum , the crustacea Tigriopus japonicus and Portunus trituberculatus , and the polychaete Perinereis nuntia . The algae, and especially the diatoms C . calcitrans and S . costatum , were sensitive to Sea-Nine 211 toxicity, with the average acute toxicity values being 0.32, 3.9, 1.6, 0.22, 1.6, 12, and 27 μg/l for C . calcitrans , D . tertiolecta , T . tetrathele , S . costatum , T . japonicus , P . trituberculatus , and P . nuntia , respectively. A sediment toxicity test for Sea-Nine 211 using the polychaete P . nuntia revealed demonstrated that the 14-day median lethal concentration was 110 μg/kg dry-wt sediment and that growth was the most sensitive indicator. The chronic toxicity values of Sea-Nine 211 for the diatoms C . calcitrans and S . costatum were within the range of reported Sea-Nine 211 concentrations in seawater in coastal Japan, and the toxicity values for P . nuntia were within the reported concentrations in sediment. Based on these results, Sea-Nine 211 may have toxic effects on some sensitive species residing in the coastal areas of Japan, but the ecological risk posed by Sea-Nine 211 would appear to be confined to a limited area of Japanese coastal waters.