Pollution status and potential ecological risk assessment of heavy metals in surface sediments of Anpu port
DENG Yan1,2, YU Ze-bin1, ZHOU Yan-wu3, CHEN Lan2, PENG Xiao-yan2, LAN Wen-lu2
1. School of Environment, Guangxi University, Nanning 530004, China;
2. Guangxi Marine Environmental Monitoring Central Station, Beihai 536000, China;
3. Institute of Oceanography in South China Sea, Guangzhou 510301, China
摘要 通过对21个表层沉积物样品中的Cu、Pb、Zn、Cd、Cr、Hg、As 等7 种重金属元素含量进行测定，分析了安铺港沉积物中重金属的空间分布特征及其对港湾生态环境的危害状况。采用重金属单因子污染系数、综合污染指数对其污染程度进行了评价，并采用Hàkanson 潜在生态危害系数与潜在生态风险指数法对重金属潜在危害进行了预测。结果表明：安铺港表层沉积物中重金属含量空间离散性较大，总体处于低污染状态，各重金属污染程度依次为Hg > Cd > Pb > As > Zn > Cu > Cr；安铺港潜在生态风险危害总体属于低生态危害范畴，重金属生态危害系数的排序为Hg > Cd > As > Pb > Cu > Cr > Zn；各金属与有机质及相互之间较显著的正相关，其中，Cd与有机质和各金属的相关性略低。
Abstract：Seven heavy metals (Cu,Pb,Zn,Cd,Hg,Cr,Hg,As) were investigated for their content distribution and ecological harm in Anpu port where 21 samples were collected in its deposit.The pollution level of these heavy metals was evaluated using single factor pollution coefficient and comprehensive pollution index.Meanwhile,the potential hazards of heavy metals were predicted using the Hàkanson potential harm coefficient and potential ecological risk index.The results showed that spatial divergence of these heavy metals was fairly large and pollution level was in low environmental pollution in general,by the order of Hg > Cd > Pb > As > Zn > Cu > Cr.The potential ecological risk was in a low ecological hazard category overall,and the sequence of harm coefficient was Hg > Cd > As > Pb > Cu > Cr > Zn.There was significant positive correlation between each heavy metals except Cd.
DENG Yan,YU Ze-bin,ZHOU Yan-wu et al. Pollution status and potential ecological risk assessment of heavy metals in surface sediments of Anpu port[J]. Marine Environmental Science, 2017, 36(3): 398-405.
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