陈秋明, 赵蓉蓉, 林杰, 黄发明. 围头湾表层沉积物中Hg和As污染分布特征及状况评价[J]. 海洋环境科学, 2021, 40(5): 732-738. DOI: 10.12111/j.20200268
引用本文: 陈秋明, 赵蓉蓉, 林杰, 黄发明. 围头湾表层沉积物中Hg和As污染分布特征及状况评价[J]. 海洋环境科学, 2021, 40(5): 732-738. DOI: 10.12111/j.20200268
CHEN Qiu-ming, ZHAO Rong-rong, LIN Jie, HUANG Fa-ming. Distribution characteristics and pollution evaluation assessment of Hg and As in surface sediments of Weitou bay[J]. Chinese Journal of MARINE ENVIRONMENTAL SCIENCE, 2021, 40(5): 732-738. DOI: 10.12111/j.20200268
Citation: CHEN Qiu-ming, ZHAO Rong-rong, LIN Jie, HUANG Fa-ming. Distribution characteristics and pollution evaluation assessment of Hg and As in surface sediments of Weitou bay[J]. Chinese Journal of MARINE ENVIRONMENTAL SCIENCE, 2021, 40(5): 732-738. DOI: 10.12111/j.20200268

围头湾表层沉积物中Hg和As污染分布特征及状况评价

Distribution characteristics and pollution evaluation assessment of Hg and As in surface sediments of Weitou bay

  • 摘要: 本研究采用2008年和2017年围头湾海域表层沉积物中Hg和As的含量数据,分析评价了其空间分布、污染状况和潜在生态风险。研究结果表明:近10年来,围头湾海域表层沉积物中Hg平均含量有所减少,As平均含量有所增加,变化趋势与水体、底栖生物中相应污染因子的变化一致。围头湾表层沉积物中Hg和As的地质累积指数均小于0,总体污染负荷指数小于1,污染程度为无污染;单金属潜在生态危害系数均小于40,生态风险等级为低等级;从空间分布上看,围头湾表层沉积物中Hg和As含量与区域发展格局相对应,2008年高值区主要集中在内湾,随着内湾的环境整治和海洋生态修复,2017年该海域Hg和As含量有所降低,高值区向外湾东南侧新增工业园沿岸海域转移。

     

    Abstract: In this study, the amounts of Hg and As in surface sediments of Weitou bay in 2008 and 2017 were examined to assess their spatial distribution, contamination level and potential ecological risks. The results revealed that the concentration levels of Hg in surface sediments of Weitou bay declined while As raised in the last decade. This pattern was consistent with the changes of the concentration levels of Hg and As in seawater and benthic organisms. The geo-accumulation indices of Hg and As were less than 0, and the overall pollution load index was less than 1, which indicated that the sediments of Weitou bay were clear of Hg and As contamination. Additionally, the ecological risk level was low in Weitou bay depended on the potential ecological risk indices of Hg and As were less than 40. According to the evaluation of spatial distribution, the amounts of Hg and As in surface sediments were associated with the geographic advancement. In 2008, the high-value regions were located mostly in inner bay. In 2017, with the implementation of the environmental remediation and marine restoration in inner bay, the amounts of Hg and As has declined. The high-value regions have been relocated to the southeast side of outer bay along the coast of new industrial estate.

     

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