九龙江和厦门西港近岸表层沉积物中汞的赋存形态及生态风险评价

发布时间：2018-05-07 08:24

本文选题：汞 + 赋存形态　；参考：《环境化学》2016年04期

【摘要】：测定了九龙江和厦门西港44个近岸表层沉积物中总汞含量及不同赋存形态汞的含量,分析了汞的分布特征、赋存形态、生物有效性和潜在生态风险.结果表明,表层沉积物中总汞平均含量(mg·kg-1)顺序为:九龙江北溪(0.174)九龙江河口(0.172)九龙江西溪(0.132)厦门西港(0.095),分别为福建省土壤元素背景值的2.15、2.12、1.63和1.17倍.九龙江北溪、西溪、河口和厦门西港表层沉积物中生物有效态汞比例分别为54.7%、32.5%、38.2%和39.4%.地质累积指数法、潜在生态风险指数法和次生相与原生相分布比值法评价结果表明,九龙江和厦门西港近岸表层沉积物中汞主要为轻度污染,存在中等—较高潜在生态风险.需对汞污染进行综合防治.
[Abstract]:The contents of total mercury and mercury in the surface sediments of 44 nearshore sediments in Jiulong River and Xiamen West Port were determined. The distribution characteristics, occurrence forms, bioavailability and potential ecological risks of mercury were analyzed. The results showed that the order of the average content of total mercury in surface sediments was: Jiulong River North River, 0.174) Jiulong River Estuary, Jiulong River Estuary, Jiulong River, Xixi River, Jiulong River, and Xigang (0.132), which was 2.15 ~ 2.12 ~ 1.63 and 1.17 times of the background value of soil elements in Fujian Province, respectively. The proportion of bioavailable mercury in the surface sediments of Beixi, Xixi, estuary and Xigang of Jiulong River is 54.7% and 32.5%, 38.2% and 39.4% respectively. The results of geological accumulation index method, potential ecological risk index method and the ratio of secondary facies to primary phase distribution showed that mercury in surface sediments of Jiulong River and Xiamen West Port was mainly slightly polluted, and there was a moderate to high potential ecological risk. Comprehensive control of mercury pollution is needed.
【作者单位】：华侨大学环境科学与工程系;
【基金】：国家自然科学基金(21177043;21077036) 华侨大学研究生科研创新能力培育计划项目(423)资助~~
【分类号】：X55;X820.4

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