中国海州湾潮滩沉积物中的重金属污染与评估。
Heavy metal pollution and assessment in the tidal flat sediments of Haizhou Bay, China.
机构信息
School of Geodesy and Geomatics Engineering, Huaihai Institute of Technology, Lianyungang 222005, Jiangsu Province, China; State Key Laboratory of Pollution Control and Resources Reuse, Nanjing University, Nanjing 210093, China.
出版信息
Mar Pollut Bull. 2013 Sep 15;74(1):403-12. doi: 10.1016/j.marpolbul.2013.06.019. Epub 2013 Jun 30.
The heavy metal inventory and the ecological risk of the tidal flat sediments in Haizhou Bay were investigated. Results show that the average concentrations of heavy metals in the surface sediments exceeded the environment background values of Jiangsu Province coastal soil, suggesting that the surface sediments were mainly polluted by heavy metals (Cd, Cr, Cu, Mn, Pb and Zn). In addition, the profiles of heavy metals fluxes can reflect the socio-economic development of Lianyungang City, and heavy metals inputs were attributed to anthropogenic activities. Cr, Cu, Pb and Zn were mainly present in the non-bioavailable residual form in surface sediments, whereas Cd and Mn were predominantly in the highly mobile acid soluble and reducible fractions. The ecological risk of the polluted sediments stemmed mainly from Cd and Pb. According to the Sediment quality guidelines (SQGs), however, the adverse biological effects caused by the heavy metals occasionally occurred in tidal flat.
对海州湾潮滩沉积物中的重金属含量和生态风险进行了研究。结果表明，表层沉积物中重金属的平均浓度超过了江苏省沿海土壤的环境背景值，表明表层沉积物主要受到重金属（Cd、Cr、Cu、Mn、Pb 和 Zn）的污染。此外，重金属通量的分布特征可以反映连云港市的社会经济发展状况，重金属的输入主要与人为活动有关。Cr、Cu、Pb 和 Zn 主要以非生物有效态残渣形式存在于表层沉积物中，而 Cd 和 Mn 则主要以高迁移性酸溶态和可还原态存在。污染沉积物的生态风险主要来自 Cd 和 Pb。然而，根据沉积物质量准则（SQGs），重金属偶尔会对潮滩产生不良的生物效应。
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