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梁千千,刘熊,徐轶肖,张腾,雷富,陈丽雯,黄晓煦,戴圣生.涠洲岛海域重金属质量状况及评价[J].广西科学,2021,28(2):136-144. [点击复制]
- LIANG Qianqian,LIU Xiong,XU Yixiao,ZHANG Teng,LEI Fu,CHEN Liwen,HUANG Xiaoxu,DAI Shengsheng.Quality Status and Evaluation of Heavy Metals in the Sea around Weizhou Island[J].Guangxi Sciences,2021,28(2):136-144. [点击复制]
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| 涠洲岛海域重金属质量状况及评价 |
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梁千千1, 刘熊2, 徐轶肖3, 张腾3, 雷富1, 陈丽雯1, 黄晓煦1, 戴圣生4
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| (1.广西科学院北部湾海洋研究中心, 广西近海海洋环境科学重点实验室, 广西海洋天然产物与组合生物合成化学重点实验室, 广西南宁 530007;2.防城港市海域使用动态监管中心, 广西防城港 538001;3.南宁师范大学, 广西地表过程与智能模拟重点实验室, 北部湾环境演变与资源利用教育部重点实验室, 广西南宁 530001;4.广西科学院, 广西南宁 530007) |
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| 摘要: |
| 本研究拟分析评价广西涠洲岛海域海水和表层沉积物中的重金属 （铜、铅、锌、镉、铬、汞） 污染情况，为该海域环境保护和可持续发展提供科学依据。实验于2018年12月和2019年6月采集涠洲岛海域8个站位水质和7个表层沉积物样品，利用原子吸收光谱和DMA-80型直接测汞仪测定重金属含量，分析评价水质和表层沉积物受重金属污染程度。结果表明，调查海域海水重金属平均含量均未超过海水水质一类标准限值，夏季部分站位Pb和Zn含量超标，海水中的重金属污染程度为Pb>Zn>Hg>Cu>Cd>Cr；表层沉积物重金属综合污染程度和潜在生态风险均较低，重金属污染指数大小为Cd>Cr>Zn>Cu>Pb=Hg，重金属对海洋生态系统潜在危害的影响程度为Cd>Hg>Cr>Pb>Cu>Zn，该海域沉积物中主要潜在生态风险因子为Cd和Hg。总体来说，涠洲岛海域重金属污染属于低污染水平。 |
| 关键词: 涠洲岛 重金属 海水 沉积物 污染评价 |
| DOI：10.13656/j.cnki.gxkx.20210609.004 |
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| 基金项目:广西近海海洋环境科学重点实验室自主研究课题（18A0303），国家自然科学基金（41976155），广西自然科学基金（2020GXNSFDA297001），北部湾环境演变与资源利用教育部重点实验室和广西地表过程与智能模拟重点实验室开放基金（GTEU-KLOP-K1803）资助。 |
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| Quality Status and Evaluation of Heavy Metals in the Sea around Weizhou Island |
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LIANG Qianqian1, LIU Xiong2, XU Yixiao3, ZHANG Teng3, LEI Fu1, CHEN Liwen1, HUANG Xiaoxu1, DAI Shengsheng4
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| (1.Guangxi Key Laboratory of Marine Environmental Science, Guangxi Key Laboratory of Marine Natural Products and Combinatorial Biosynthesis Chemistry, Beibu Gulf Marine Research Center, Guangxi Academy of Sciences, Nanning, Guangxi, 530007, China;2.Center for Dynamic Supervision for Usage of Fangchenggang City Sea Area, Fangchenggang, Guangxi, 538001, China;3.Guangxi Key Laboratory of Earth Surface Processes and Intelligent Simulation, Key Laboratory of Environment Change and Resources Use in Beibu Gulf, Ministry of Education, Guangxi Teachers Education University, Nanning, Guangxi, 530001, China;4.Guangxi Academy of Sciences, Nanning, Guangxi, 530007, China) |
| Abstract: |
| This study intends to analyze and evaluate the pollution of heavy metals (copper, lead, zinc, cadmium, chromium, mercury) in the seawater and surface sediments of Weizhou Island, Guangxi, which can provide scientific basis for the environmental protection and sustainable development of the sea area. In December 2018 and June 2019, water quality and 7 surface sediment samples were collected from 8 stations in the sea area of Weizhou Island. The content of heavy metals was determined by atomic absorption spectrometry and DMA-80 direct mercury analyzer, and the pollution degree of heavy metals in water quality and surface sediment was analyzed and evaluated. The results showed that the average content of heavy metals in seawater in the investigated area did not exceed the Class I standard limit for seawater quality, and the contents of Pb and Zn in some stations exceeded the standard in summer. The pollution degree of heavy metals in seawater was Pb>Zn>Hg>Cu>Cd>Cr.The comprehensive pollution degree and potential ecological risk of heavy metals in surface sediments were generally lower, and the pollution index was Cd>Cr>Zn>Cu>Pb=Hg. The influence degree of heavy metals on the potential hazards of marine ecosystem was Cd>Hg>Cr>Pb>Cu>Zn, and the main potential ecological risk factors in the sediments of this sea area were Cd and Hg. All in all, the heavy metal pollution in the sea area of Weizhou Island belongs to the low pollution level. |
| Key words: Weizhou Island heavy metals seawater sediments pollution evaluation |
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