雷明丹, 王朝晖, 江涛. 青岛近岸海域表层沉积物生源要素分布及污染状况评价[J]. 海洋环境科学, 2021, 40(1): 93-100. DOI: 10.12111/j.mes.20190301
引用本文: 雷明丹, 王朝晖, 江涛. 青岛近岸海域表层沉积物生源要素分布及污染状况评价[J]. 海洋环境科学, 2021, 40(1): 93-100. DOI: 10.12111/j.mes.20190301
LEI Ming-dan, WANG Zhao-hui, JIANG Tao. Distribution and pollution assessment of biogenic elements in surface sediments from Qingdao coastal area[J]. Chinese Journal of MARINE ENVIRONMENTAL SCIENCE, 2021, 40(1): 93-100. DOI: 10.12111/j.mes.20190301
Citation: LEI Ming-dan, WANG Zhao-hui, JIANG Tao. Distribution and pollution assessment of biogenic elements in surface sediments from Qingdao coastal area[J]. Chinese Journal of MARINE ENVIRONMENTAL SCIENCE, 2021, 40(1): 93-100. DOI: 10.12111/j.mes.20190301

青岛近岸海域表层沉积物生源要素分布及污染状况评价

Distribution and pollution assessment of biogenic elements in surface sediments from Qingdao coastal area

  • 摘要: 为了解青岛市近岸海域不同功能海区沉积物中生源要素分布及污染状况,于2017年11月在胶州湾、崂山近岸海域和青岛市文昌鱼保护区共采集了33个表层沉积物样品,分析了沉积物生源要素中总有机碳(TOC)、总氮(TN)、总磷(TP)及生物硅(BSi)的含量。青岛近岸海域TOC、TN、TP和BSi含量范围分别为0.21%~1.43%、0.02%~0.13%、0.06%~0.15%和0.26%~0.60%。胶州湾表层沉积物中TN和TP含量较高,崂山近岸海域TOC较高,而文昌鱼保护区BSi含量较高。此外,胶州湾沉积物中BSi含量呈显著下降趋势,说明海域硅藻生产力的下降。根据沉积物中TOC/TN摩尔比,崂山近岸海域沉积物中有机质为海源和陆源混合输入,而胶州湾和文昌鱼保护区有机质的主要来源为海源输入。生源要素污染评价结果显示,青岛近岸海域表层沉积物中TOC含量未受到污染,而TN和TP则处于中等污染水平。

     

    Abstract: Thirty-three surface sediment samples were collected from Jiaozhou bay, Laoshan coastal area and Qingdao amphioxus reserve area in November 2017. Biogenic elements including total organic carbon (TOC), total nitrogen (TN), total phosphate (TP) and biogenic silica (BSi) were analyzed. Concentrations of TOC, TN, TP and BSi were in the range of 0.21%~1.43%, 0.02%~0.13%, 0.06%~0.15%, 0.26%~0.60%, respectively. TN and TP were high in Jiaozhou bay, and TOC was high in Laoshan coastal area. While, BSi was high in amphioxus reserve area. In addition, BSi in Jiaozhou bay showed a significant decreasing trend compared to the previous studies, indicating the decrease of diatom productivity. Based on the molar ratios of TOC/TN, TOC in Jiaozhou bay and amphioxus reserve area was originated from mixture inputs of terrestrial and marine sources, while was mainly originated from marine sources in Laoshan coastal area. Results from pollution assessment of biogenic elements indicated that TOC in the surface sediments from Qingdao coast belonged to the uncontaminated level, however TN and TP reached moderate pollution level.

     

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