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Monitoring of environmental pollution caused by the heavy oil spill accident at the Japan sea and evaluation of toxicities of polluted environmental samples

日本海重油泄漏事故环境污染监测及污染环境样品毒性评价

基本信息

批准号：
10672106
负责人：
KIZU Ryoichi
金额：
$ 1.98万
依托单位：
Kanazawa University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1998
资助国家：
日本
起止时间：
1998 至 1999
项目状态：
已结题

项目摘要

A Russian tanker Nakhodka met a hull-broken accident in sailing in the Sea of Japan on January 2, 1997, releasing a huge quantity of heavy oil into the Sea of Japan and the spilled oil polluted the coastline from the Shimane Prefecture through the Yamagata Prefecture. So, we conducted extensive scientific studies to assess where and how long the pollution by the oil or chemicals persist in the environment and the impact of the spill on biological systems. The following results were obtained in the present study: 1) The survey of oil-polluted area in Ishikawa Prefecture revealed that several area have been still heavily polluted with oil even at 2 years post-accident while number of polluted area has decreased in the course of years. 2) Many of the coasts polluted with oil located at the area steep and hard to get near and had surfaces covered with rocks or boulder / cobble / pebble / gravel. It has been considered that much effort to remove the reached oil was not made and natural cleaning effect with those areas was small. 3) As for polycyclic aromatic hydrocarbons (PAHs) in reached oils, concentrations of PAHs with 3-to 6-rings did not decrease significantly and were approximately half those of the oil loaded in the Nakhodka. 4) Indirect mutagenicities of reached oils sampled at 1 year post accident were approximately 80% of those sampled immediately after the accident and found to correspond to the PAH concentrations in reached oils. 5) Heavy oils including the Nakhodka-loaded oil were found to show antiestrogenicity and this activity was due in part to PAHs.

1997年1月2日，俄罗斯“纳霍德卡”号油轮在日本海航行时发生船体破裂事故，大量重油流入日本海，溢油污染了岛根县至山形县的海岸线。因此，我们进行了广泛的科学研究，以评估石油或化学品污染在环境中持续存在的位置和持续时间，以及泄漏对生物系统的影响。本研究获得以下结果： 1）对石川县石油污染地区的调查显示，即使在事故发生两年后，一些地区仍然受到严重的石油污染，而污染地区的数量逐年减少。 2）许多被石油污染的海岸位于陡峭且难以接近的区域，并且表面覆盖着岩石或巨石/鹅卵石/卵石/砾石。人们认为，没有付出很大的努力来去除所达到的油，并且这些区域的自然清洁效果很小。 3）对于到达油中的多环芳烃（PAH），3至6环PAH的浓度没有明显下降，约为纳霍德卡装载油的一半。 4) 事故发生后一年内取样的油品的间接致突变性约为事故发生后立即取样的油品的 80%，并且发现与油品中的 PAH 浓度相对应。 5) 发现包括纳霍德卡负载油在内的重油表现出抗雌激素性，这种活性部分归因于多环芳烃。