Historical trend of ecological risk caused by copper sediment in Quintero Bay, Chile, associated with a copper smelter and refinery

IF 5.3 3区 环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES
Francisco Encina-Montoya , Elisa Ramírez-Sánchez , Carlos Oberti-Grassau , Carla Gallardo , Carlos Arias-Melgarejo , Carlos Esse , Sandor Mulsow , Patricia Mejias-Lagos , Rolando Vega-Aguayo
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Abstract

The Ventanas copper smelter began its activities in Quintero Bay in 1960, and it is estimated that it has released around 152 tons of copper per year into the waters of the bay since then. The increasing copper concentrations in the sediments exceed international standards and pose a potential danger for marine fauna. The object of this work carries out a present and historical ecological risk assessment of copper concentrations in the marine sediment of Quintero Bay. Copper concentration profiles in sediments from the bay were studied to compare present concentration data with a chronological estimate obtained using the 210Pb excess activity age model. A protective value of HC5 of 338 mg kg-1 and a PNEC of 33.8 mg kg-1 were estimated. The results showed a background concentration before 1964 with no ecological risk (30.3 mg kg-1; RQ < 1); subsequently, the concentration was found to increase from 45.2 mg kg-1 in 1964 to a maximum of 85.4 mg kg-1 in 1990, with RQ values between 1.3 and 2.5. Concentrations in sediments over the period 1997–2022 presented maximum values between 70 and 283.6 mg kg-1. The ecological risk characterization showed that all sites presented a risk to biodiversity (RQ > 1), with a probability of occurrence of 0.44–77.56 %. This research highlights the need to develop quality standards that consider the sensitivity of local species, and to use the ecological risk assessment methodology to support business management and reduce the environmental impact in industrial areas such as Quintero.
智利金特罗湾铜沉积物造成的生态风险历史趋势,与铜冶炼厂和精炼厂有关。
1960年,维塔纳斯铜冶炼厂开始在金特罗湾开展活动,据估计,从那时起,它每年向海湾水域排放约152吨铜。沉积物中铜浓度的增加超过了国际标准,对海洋动物构成了潜在的危险。本工作的目的是对金特罗湾海洋沉积物中铜浓度的现状和历史生态风险进行评估。研究了海湾沉积物中的铜浓度剖面,将现有浓度数据与使用210Pb过量活动年龄模型获得的时间估算值进行了比较。HC5的保护值为338 mg kg-1, PNEC为33.8 mg kg-1。结果显示,1964年以前的背景浓度(30.3 mg kg-1;rq1),发生概率为0.44 ~ 77.56%。这项研究强调需要制定考虑到当地物种敏感性的质量标准,并使用生态风险评估方法来支持商业管理,减少诸如Quintero等工业区的环境影响。
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来源期刊
Marine pollution bulletin
Marine pollution bulletin 环境科学-海洋与淡水生物学
CiteScore
10.20
自引率
15.50%
发文量
1077
审稿时长
68 days
期刊介绍: Marine Pollution Bulletin is concerned with the rational use of maritime and marine resources in estuaries, the seas and oceans, as well as with documenting marine pollution and introducing new forms of measurement and analysis. A wide range of topics are discussed as news, comment, reviews and research reports, not only on effluent disposal and pollution control, but also on the management, economic aspects and protection of the marine environment in general.
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