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《Environmental Science & Technology》 2017-02
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Distribution Characteristics of Total Mercury Content in Top-Sediments of Intertidal Zone of the Beibu Gulf in Guangxi

XIONG Dan;LIN Qing;ZHAO Yinjun;HU Baoqing;School of Geography and Planning,Key Laboratory of Beibu Gulf Environmental Evolution and Resources Utilization, Ministry of Education,Guangxi Normal College;  
Mercury contained in top sediments at 13 sampling points over the intertidal zone stretching along the Beibu Gulf in Guangxi was investigated and the sediment samples collected was detected with the MILESTONE DMA-80 solid and liquid phase of direct mercury analyzer. Furthermore,mercury pollution level in sediments was determined to assess the potential ecological risks by use of the single factor index method. The investigation showed that total Hg in the sediments samples of all those points were widely ranged(24.60~125.87 ng/g) with the average value being 60.58 ng/g. As far as the differences of mercury content between the different study zone-related sea areas,the average mercury content in the descending order was:the Qinzhou sea area the Beihai sea area the Fangchenggang sea area;general speaking,mercury pollution risk coefficient in the intertidal sediments of the Beibu Gulf was low,albeit some of the places being close to the critical value of medium risk degree. In conclusion,the potential ecological risk of mercury in top sediments of the intertidal zone along the Beibu Gulf was relatively low,total Hg concentration being below the limiting value of the related national standard.
【Fund】: 国家自然科学基金项目(41461021 41361022)
【CateGory Index】: X55
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