温州近岸海域沉积物中重金属生态风险评价

发布时间：2018-02-01 04:33

本文关键词： 温州近岸海域重金属地累积指数潜在生态风险评价　出处：《环境科学与技术》2016年S2期 　论文类型：期刊论文

【摘要】：对2014年温州近岸海域表层沉积物中重金属(Cu、Pb、Zn、Cd、Cr、Hg、As)的含量进行了分析,据其结果分析温州近岸海域表层沉积物中重金属的分布特征,并分别采用地累积指数法和潜在生态风险指数法评价其污染状况。结果表明,温州近岸海域表层沉积物中铜污染情况最为严重,超过第一类沉积物质量标准的站位占64.8%。7种重金属含量均呈现近岸向远岸递减的分布特征,高值区分布在瓯江口、飞云江口、鳌江口海域。地累积指数评价结果显示Pb、Cr、Hg、As未出现污染,Zn表现为轻度污染,Cu、Cd主要表现为轻度污染并有少数测点达到偏中度污染,地累积污染指数大小顺序为CuCdZnPbCrAsHg。生态风险指数评价结果显示,温州近岸海域表层沉积物中重金属元素整体表现为低潜在生态风险,Cu、Pb、Zn、Cr、Hg、As表现为低潜在生态风险,而Cd主要表现为中等潜在生态风险并有少数测点达到较高潜在生态风险,各种元素对区域内的潜在生态风险危害的大小顺序为CdCuHgPbAsCrZn。
[Abstract]:In 2014, the contents of heavy metal (CuPb) in the surface sediments of Wenzhou coastal waters were analyzed. According to the results, the distribution characteristics of heavy metals in the surface sediments of Wenzhou coastal waters were analyzed, and the pollution status was evaluated by the method of ground accumulation index and potential ecological risk index, respectively. The copper pollution in the surface sediments of Wenzhou coastal waters is the most serious, and the stations exceeding the quality standard of the first kind of sediments account for 64.8.7 kinds of heavy metals, all of which show the distribution characteristics of the decline from the near shore to the far shore. The high value area is distributed in the waters of Oujiang Estuary, Feiyun Estuary and Aojiang Estuary. CD mainly showed slight pollution and a few sites reached moderate pollution. The order of soil accumulated pollution index was CuCdZnPbCrAsHg. The ecological risk index was evaluated. The heavy metal elements in the surface sediments of the coastal waters of Wenzhou show low potential ecological risk as a whole. CD mainly showed medium potential ecological risk and a few sites reached high potential ecological risk. The order of potential ecological risk hazards of various elements is CdCuHgPbAsCrZn.
【作者单位】：国家海洋局温州海洋环境监测中心站;
【基金】：浙江省海洋环保和生态专项资金([浙海渔计(2012)100号];[浙海渔计(2015)67号])
【分类号】：X55;X820.4
【正文快照】： 温州海域北起乐清市与温岭市交界处的湖雾定头,南至浙闽交界的虎头鼻至七星岛(星仔)南端一线,海岸线长355 km,辖区内主要有3条河流入海,即瓯江、飞云江和鳌江,其中瓯江为浙江省第二大河,瓯江口是我国列长江口、黄河口、珠江口、钱塘江口之后的第五大河口。强大的径流带来大量

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