| 西沙永兴岛附近海域沉积物的环境质量评价 |
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| 引用本文： | 徐阁,王德鸿,王诗文,石军,袁超,韩留玉.西沙永兴岛附近海域沉积物的环境质量评价[J].海洋学报,2022,44(1):137-146. |
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| 作者姓名： | 徐阁 王德鸿 王诗文 石军 袁超 韩留玉 |
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| 作者单位： | 国家海洋局海口海洋环境监测中心站，海南 海口 570311 |
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| 基金项目： | 国家海洋局南海分局海洋科学技术局长基金(1542)。 |
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| 摘 要： | 根据2009?2017年9个航次对西沙永兴岛附近海域共6个站位的沉积物重金属监测结果，应用数理统计法估算了该区域7种重金属元素的背景值，分析了重金属的含量及年际变化，采用单因子标准指数法和潜在生态危害指数法对其重金属含量进行了评价。结果表明:研究区域沉积物重金属具有低背景值，均符合海洋沉积物质量第一类标准，沉积物质量为优。7种重金属含量的年际变化显著，变化规律不尽相同，受岛上开发活动影响较大。从2009年到2017年，重金属Zn、Cd、Cu、Cr、As和Hg含量变化的总体趋势先增多后减少，Pb的含量则表现为增多。潜在生态风险评价显示，多年平均潜在生态危害系数由大到小依次为Cd、Hg、As、Cu、Pb、Cr、Zn，Cd和Hg是该研究海域潜在的生态风险因子。
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| 关 键 词： | 永兴岛 沉积物 重金属 背景值 年际变化 生态风险 |
| 收稿时间： | 2021-05-04 |
Evaluation on sediments quality around the Yongxing Island of Xisha |
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| Xu Ge,Wang Dehong,Wang Shiwen,Shi Jun,Yuan Chao,Han Liuyu.Evaluation on sediments quality around the Yongxing Island of Xisha[J].Acta Oceanologica Sinica (in Chinese),2022,44(1):137-146. |
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| Authors: | Xu Ge Wang Dehong Wang Shiwen Shi Jun Yuan Chao Han Liuyu |
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| Affiliation: | Haikou Marine Environmental Monitoring Center Station, State Oceanic Administration, Haikou 570311, China |
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| Abstract: | Based on the investigations of surface sediments at six sampling stations of nine cruises carried out in the sea around the Yongxing Island of Xisha from 2009 to 2017, the background values of seven heavy metals are determined through the process of mathematical statistics, the contents and inter-annual variations of heavy metals are analyzed, and the contents of the heavy metals are evaluated by means of single factor standard index and potential ecological risk index. The results show that the background values of heavy metals in the sediments of the study area are low, the average level of them meet the first class of marine sediment quality, and the quality of sediment is excellent. The inter-annual variations of seven heavy metals in the sediments of the study area are slightly different and generally significant and affected obviously by the development activities on the Yongxing Island. From 2009 to 2017, the contents of Zn, Cd, Cu, Cr, As and Hg are to increase first and then decrease, while the content of Pb is to increase. The assessment by means of potential ecological risk index shows that the multi year average of potential ecological risk indexes are in the order of Cd, Hg, As, Cu, Pb, Cr, Zn, and Cd and Hg are the main potential ecological risk factors of the study area. |
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| Keywords: | Yongxing Island sediment heavy metals background values inter-annual variations ecological risk |
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