Ecological Risk Assessment of Copper in Coastal Areas of Japan: How will Bioavailability Considerations Change the Assessment Results?

R. Tai, W. Naito, S. Masunaga
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引用次数: 1

Abstract

We conducted ecological risk assessment of copper in coastal areas of Japan. For risk assessment, we used a method in the initial environmental risk assessment conducted by the Ministry of the Environment, Japan, and several methods considering bioavailability, used for setting water quality criteria in Europe and the United States. The hazard quotient ( HQ ) method was used for risk characterization. Risk assessment was conducted using 1,622 copper concentration values from the Japanese coastal areas over the past 31 years that we were able to collect. As a result, the area with HQ exceeding 1 was 70.2% of the total in the screening level evaluation; considering bioavailability, it was 3.6 to 4.0%, and the risk characterization result changed depending on the hazard assessment method. Also, considering bioavailability, it was clear that there is a difference in the risk characterization result because water quality varies depending on the location even within the same bay. These results suggest that it is important to obtain toxicological data of species inhabiting Japan and copper concentrations in Japanese coastal areas and to examine what kind of evaluation method should be used for risk assessment.
日本沿海地区铜的生态风险评估:生物利用度因素如何改变评估结果?
我们对日本沿海地区的铜进行了生态风险评估。对于风险评估,我们使用了日本环境省进行的初始环境风险评估中的一种方法,以及欧洲和美国用于制定水质标准的几种考虑生物利用度的方法。采用危害商(HQ)法进行风险表征。我们利用过去31年日本沿海地区收集到的1,622个铜浓度值进行了风险评估。因此,在筛选水平评价中,HQ超过1的区域占总区域的70.2%;生物利用度为3.6 ~ 4.0%,不同的危险度评价方法不同,风险表征结果也不同。此外,考虑到生物利用度,很明显,风险表征结果存在差异,因为即使在同一海湾内,水质也因位置而异。这些结果表明,获取居住在日本的物种的毒理学数据和日本沿海地区的铜浓度,并研究采用何种评估方法进行风险评估具有重要意义。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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