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根据2011年东山湾海洋生态环境的调查资料,对东山湾表层沉积物中Hg、As含量的分布特征及其潜在的生态风险,以及主要环境因子与Hg、As含量之间的相关性进行了探讨。结果表明,表层沉积物中Hg、As含量范围分别为(0.024~0.073)×10-6和(3.00~5.88)×10-6,均值分别为0.043×10-6和4.24×10-6。总体上,表层沉积物中Hg、As含量的平面分布呈湾顶高湾外低的格局,2007~2011年的年际变化呈下降之势。表层沉积物中有机质、粘土与Hg、As含量之间均呈正相关关系、但Hg与之的相关性比As显著。东山湾沉积物Hg、As含量符合GB 18668-2002《海洋沉积物质量》一类标准,潜在生态风险较低。
According to the investigation data of Dongshan Bay marine ecological environment in 2011, the distribution characteristics of Hg and As in Dongshanwan surface sediments and its potential ecological risk as well as the correlation between major environmental factors and Hg, As content were discussed . The results showed that the contents of Hg and As in the surface sediments ranged from 0.024 to 0.073 × 10-6 and from 3.00 to 5.88 × 10-6, with the mean values of 0.043 × 10-6 and 4.24 × 10-6, respectively. In general, the distribution of Hg and As in the surface sediments showed a pattern of low top and low bay tops, and the interannual variation from 2007 to 2011 showed a downward trend. The surface sediments of organic matter, clay and Hg, As content between the positive correlation, but the correlation between Hg than As significant. Dongshan Bay sediments Hg, As content in line with GB 18668-2002 “marine sediment quality” a standard, the potential ecological risk is low.