文章摘要
近海海水和表层沉积物重金属污染与生态风险评价——以海南新村港为例
Assessment on heavy metals pollution and potential ecological risk of seawater and surface sediments in coastal waters: A case study in Xincun Lagoon
投稿时间:2018-04-19  修订日期:2018-05-12
DOI:10.13872/j.1000-0275.2018.0039
中文关键词: 重金属  海水  沉积物  综合污染指数  潜在生态风险指数  生态风险
英文关键词: heavy metals  seawater  sediment  comprehensive pollution index, Potential ecological risk index  ecological risk
基金项目:公益性行业(农业)科研专项(201403008);中国水产科学研究院南海水产研究所中央级公益性科研院所基本科研业务费专项资金资助(2015TS03)
作者单位E-mail
巩慧敏 中国水产科学研究院南海水产研究所 15653538215@163.com 
刘永 中国水产科学研究院南海水产研究所 liuyong@scsfri.ac.cn 
肖雅元 中国水产科学研究院南海水产研究所 xiaoyayuan@163.com 
李纯厚 中国水产科学研究院南海水产研究所 scslch@vip.163.com,chunhou@scsfri.ac.cn 
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中文摘要:
      为了评价近海海水和沉积物中重金属含量与分布,以海南陵水新村港为例,对新村港近海区域设置取样监测点,分析海水和表层沉积物中的重金属元素(Cd、Pb、As、Cu、Hg和Zn)含量,采用综合污染指数法和潜在生态风险指数法对海水和沉积物中的重金属污染程度与生态风险进行了评价。结果表明,海水中Cd、Pb、As、Cu和Zn的含量(μg/L)范围分别为0~0.58 μg/L、0~3.85 μg/L、0.6~4.15 μg/L、0.55~4.7 μg/L和0~48 μg/L,年均含量分别为0.073 μg/L、0.87 μg/L、1.67 μg/L、1.90 μg/L和14.49 μg/L,Hg未检出。表层沉积物Cu、Zn、Cd、Pb、As和Hg的年均含量分别为15.37 mg/kg、63.97 mg/kg、0.175 mg/kg、18.32 mg/kg、8.05 mg/kg和0.097 mg/kg。海水中综合污染指数小于1,海水未受到重金属的污染;沉积物综合污染指数大于10,呈现较高污染状况,主要是由海水养殖和船舶运输造成的。通过潜在生态风险指数评价表明,该海域表层沉积物中重金属对海洋生态系统的潜在生态风险属于中等水平,重金属的危害大小顺序是Hg﹥Cd﹥As﹥Cu﹥Pb﹥Zn。
英文摘要:
      In order to evaluate the content and distribution of heavy metals of seawater and sediments in coastal waters, a case study has been carried out in Xincun Lagoon. In current study, the concentrations of heavy metals, including cadmium (Cd), lead (Pb), arsenic (As), copper (Cu), mercury (Hg) and zinc (Zn), from seawater and surface sediment have been analyzed. Subsequently, the pollution and potential ecological risk of heavy metals in seawater and surface sediments have been assessed by methodologies of comprehensive pollution index method and potential ecological risk index, respectively. The results showed that the concentrations of Cd, Pb, As, Cu, and Zn in seawater ranged from 0 to 0.58 μg/L, 0 to 3.85 μg/L, 0.6 to 4.15 μg/L, 0.55 to 4.7 μg/L and 0 to 48 μg/L, respectively. The annual average concentrations of listed heavy metals were 0.073 μg/L, 0.87 μg/L, 1.67 μg/L, 1.90 μg/L, and 14.49 μg/L, respectively. However, the content of Hg in seawater was not detected. Moreover, the annual average concentrations of Cd, Zn, Cd, Pb, As and Hg in surface sediments were 15.37 mg/kg, 63.97 mg/kg, 0.175 mg/kg, 18.32 mg/kg, 8.05 mg/kg, and 0.097 mg/kg, respectively. It suggested that the sea water was not polluted by heavy metals as the results of comprehensive pollution index was less than 1. However, the heavy metals surface sediments was at a relatively high pollution status because the comprehensive pollution index was more than 10, which was probably caused by mariculture and shipping. Furthermore, the results showed that the potential ecological risk of heavy metals in the surface sediments was medium level, and the potential risks indexes of heavy metals from high to low were listed as Hg, Cd, As, Cu, Pb and Zn.
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