Alternative antifouling biocides become less active in sediments?

替代防污杀菌剂在沉积物中活性降低？

基本信息

批准号：
16310026
负责人：
OKAMURA Hideo
金额：
$ 10.27万
依托单位：
Kobe University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2004
资助国家：
日本
起止时间：
2004 至 2007
项目状态：
已结题

项目摘要

Environmental fate of the new antifouling compound, triphenylborane-pyridine (TPBP), was evaluated in terms of its kinetics with sediments and ecotoxicity of its degradation products. Phenol and biphenyl was detected as major degradation products via biodegradation with natural seawater and via photodegradation with near ultra-violet irradiation. TPBP was adsorbed with sediment depending on organic matter contents of sediments and was not desorbed from the sediments. TPBP adsorbed with sediments produced phenol and biphenyl. Ecotoxicity of the two degradation products detected and other putative products such as benzene, diphenylborane, and monophenylborane was much lower than one of TPBP. The fate of TPBP in natural environment was estimated as follows: TPBP released from ship bottom paint is incorporated with suspended solids and finally fall into sediments. TPBP will be partly photodegraded in upper water column but may be less degraded in sediments with less organic matter contents at sea bottom, this may lead possible adverse effects on benthic organisms.A toxicity kit, TOX Screen 2 using Photobacterium leiognathi SB, was applied for sediment toxicity evaluation. Test bacteria was directly exposed to natural sediments using an improved method to interpolate the effects by turbidity and color of sediment on biochemiluminescence. Pollution of the sediment s collected in three bays were quantitatively evaluated with EC50 based on wet weight of sediments. No toxicity was detected in Othuchi Bay, moderate toxicity was detected in some specimen from Maizuru Bay, and high toxicity was bind in several sediments from Osaka Bay. The toxicity was dependent on the organic matter contents of sediments. More research is needed to investigate how the toxicity observed was related with the persistence of antifouling biocides and other toxic chemicals.

新型防毒化合物Triphenylborane-Pyridine（TPBP）的环境命运通过其具有沉积物和降解产物的生态毒性的动力学评估。通过与天然海水生物降解，并通过近极紫辐射通过光降解来检测苯酚和双苯基作为主要降解产物。 TPBP根据沉积物的有机物含量吸附，并没有沉积物中的沉积物。用沉积物吸附的TPBP产生的苯酚和双苯基。检测到的两种降解产物的生态毒性和其他推定产品（例如苯，二苯基硼烷和单苯基硼烷）远低于TPBP的一种。自然环境中TPBP的命运估计如下：从船底油漆中释放的TPBP与悬浮固体合并，最后掉入沉积物中。 TPBP将在上水柱中部分降解，但在海底有机物含量较少的沉积物中可能会降低，这可能会导致对底栖生物的不利影响。毒性试剂盒，使用leiognathi SB的Tox屏幕2，用于沉积毒性评估。使用改进的方法将测试细菌直接暴露于天然沉积物中，以通过沉积物对生物学发光的浊度和颜色插入影响。基于沉积物的湿重，用EC50定量评估了三个海湾中收集的沉积物S的污染。在Othuchi湾未检测到毒性，在Maizuru湾的某些标本中检测到中等毒性，而大阪湾的几个沉积物中，高毒性被结合。毒性取决于沉积物的有机物含量。需要进行更多的研究来研究观察到的毒性如何与抗污染杀菌剂和其他有毒化学物质的持久性有关。