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环雷州半岛海域表层沉积物与鲬鱼汞污染研究
杨国欢,高苑,宋之光,赵子科,孙省利
0
(广东海洋大学化学与环境学院,广东 湛江 524088;广东海洋大学分析测试中心,广东 湛江 524088)
摘要:
对2018年1月在广东环雷州半岛近海海域采集的海底表层沉积物、鲬鱼(Platycephalus indicus)进行汞含量的测定,分析比较了鲬鱼不同部位汞含量的差异,并采用单因子污染指数法对沉积物和鲬鱼的汞污染状况进行了风险评价。结果表明,环雷州半岛海域表层沉积物中汞含量范围为0.005×10-6~0.359×10-6,平均值为0.081×10-6,雷州半岛东部海域表层沉积物汞含量高于南部和西部海域。鲬鱼的鳃中汞含量范围为0.032×10-6~0.034×10-6,平均值为0.033×10-6;肌肉中的汞含量范围为0.065×10-6~0.080×10-6,平均值为0.073×10-6;肝脏中的汞含量范围为0.228×10-6~0.270×10-6,平均值为0.249×10-6。鲬鱼样品的汞含量都呈现出肝脏>肌肉>鳃。单因子污染指数评价结果显示,雷州半岛海域鲬鱼受到汞的轻微污染,雷州半岛东部海域表层沉积物存在汞污染生态风险,而其南部、西部海域尚未受到汞污染的威胁。
关键词:  海洋环境科学    表层沉积物  鲬鱼  生态风险  雷州半岛
DOI:10.3969/J.ISSN.2095-4972.2021.04.012
基金项目:国家海洋公益性行业科研专项经费资助项目(201505027-1);广东海洋大学特别人才专项资助项目(002026002004);广东海洋大学科研启动基金资助项目(R17001);广东海洋大学冲一流专项资金资助项目(231419018)
Mercury pollution of the surface sediments and Platycephalus indicus in waters around Leizhou Peninsula, China
YANG Guohuan,GAO Yuan,SONG Zhiguang,ZHAO Zike,SUN Xingli
(College of Chemistry and Environment of Guangdong Ocean University, Zhanjiang 524088, China; Analytical and Testing Centre of Guangdong Ocean University, Zhanjiang 524088, China)
Abstract:
The mercury contents in 20 surface sediments and 2 flathead fish (Platycephalus indicus) samples collected from the offshore waters around Leizhou Peninsula were analyzed and compared. The results showed that mercury contents of different sediments ranged from 0.005×10-6 to 0.359×10-6 with an average of 0.081×10-6. As a whole, the mercury contents in the sediments from the eastern offshore waters of Leizhou Peninsula were higher than those of southern and western offshore waters. Mercury contents in three fish organs, gill, muscle and liver, were in range of 0.032×10-6-0.034×10-6, 0.065×10-6-0.080×10-6 and 0.228×10-6-0.270×10-6, respectively, and the mercury contents were in order of liver > muscle > gill. The results of Pi index assessment indicated that the fish was polluted by mercury slightly. Moreover there is an ecological risk of mercury pollution in the eastern offshore waters of Leizhou Peninsula, while the southern and western waters were not threatened by mercury pollution.
Key words:  marine environmental science  mercury  surface sediments  Platycephalus indicus  ecological risk  Leizhou Peninsula

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