| 摘要: |
| 重金属是主要的环境污染物之一。文章对惠州近岸海域19个站位的表层海水重金属含量进行分析，利用算术均值型多因子指数法和Hakanson指数法进行重金属污染和生态风险评价。结果显示：① 2015年8月，惠州海水Cu、Zn、Cr、Cd、Hg、As等6种重金属元素平均值分别为4.85 μg/L、4.85 μg/L、0.595 μg/L、0.263 μg/L、0.045 μg/L、2.85 μg/L，符合海水水质第一类标准，Pb含量平均值为8.46 μg/L，符合第三类海水水质标准。②算术均值型多因子指数（I=0.379）说明，惠州海水重金属污染级别为尚清洁。③相关分析显示，海水中Zn、Hg具有同样的来源，pH对海水Pb分布有重要影响。④潜在生态危害系数Eir值由大到小依次为Hg、Pb、Cu、Cd、As、Zn、Cr，综合潜在生态危害指数(RI=22.6)表明惠州海水重金属具有轻微生态危害。 |
| 关键词: 惠州 近岸海域 海水 重金属污染 生态风险 |
| DOI： |
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| 基金项目:广东省海洋渔业科技与产业发展专项科技攻关与研发项目（A201513D09）. |
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| Evaluation of Heavy Metals Pollution and Ecological Risk in the Surface Water of Huizhou |
| XIE Wenqi,YANG Yufeng,LIANG Haoliang,FAN Kaiwen,ZHONG Zhiqiang |
| Marine Technology Center of Huizhou |
| Abstract: |
| The heavy metal is one of major environmental contaminants.Contents of heavy metals in surface water from 19 stations of Huizhou coastal area were analyzed,and pollution characteristics and ecological risk were evaluated by Arithmetic Mean Multi-factor index and Hakanson index.The results showed that the mean contents of Cu,Zn,Cr,Cd,Hg and As were 4.847,4.849,0.595,0.263,0.045 and 2.852 μg/L,respectively,in Huizhou during August in 2015,fitting the first standard.The mean content of Pb was 8.46 μg/L,belonging to the third standard.The Arithmetic Mean Multi-factor index suggested that the order of heavy metals pollution in seawater of Huizhou was clean,with I value of 0.379.Pearson correlations suggested that the source of Zn and Hg were similar.The distribution of heavy metals was affected by pH greatly.The potential ecological risk of 7 heavy metals in surface water by the potential ecological risk index was in the following order: Hg,Pb,Cu,Cd,As,Zn,Cr.The mean potential ecological risk indexes (RI) of 7 heavy metals in marine sediments of Huizhou was 22.6 posing slightly potential ecological risk |
| Key words: Huizhou,Coastal area,Sea water,Heavy metals pollution,Ecological risk |
