論文
船底防汚塗料から海水中に溶出した防汚剤トリフェニルボランピリジンに及ぼす太陽光の影響
2012 年 15 巻 2 号 p. 31-38
詳細
2012 年 15 巻 2 号 p. 31-38
Anti-fouling agents are usually used for the ship hulls to prevent biofouling by sessile organisms. There is little information available on triphenylborane pyridine (TPBP) which is one of the substitutes of banned organotin compounds. The purpose of this study was to evaluate the effects of sunlight on the fate of TPBP released from commercial anti-fouling paint into seawater. A glass plate applied anti-fouling paint was immersed in artificial seawater for a month. The solutions in a bottle containing the specimen under sunlight were periodically subjected for chemical analysis of TPBP and its degradation products and for ecotoxicity assessment using marine photobacteria Aliivibrio fischeri. TPBP released from the the specimen was almost 100 % degraded under sunlight after 2 weeks. Hydrolyzed TPBP in dark condition was 17 % after 28 day. The parent compound, TPBP, exhibited a more severe toxicity to the photobacteria than the other degradation products such as phenol and biphenyl. Toxicity of the solution under dark remained but the one under sunlight was reduced. It was suggested that other substances included in the anti-fouling paint and unkown products, which might have been produced, had less toxicity.
