安海湾表层沉积物重金属含量分布特征

发布时间：2018-04-05 16:21

本文选题：海洋化学　切入点：表层沉积物　出处：《应用海洋学学报》2017年01期

【摘要】：根据2014年8月福建安海湾9个站位表层沉积物中6种重金属的含量调查,探讨它们的分布趋势,对重金属含量进行单因子指数评价,同时对该海域污染程度进行潜在生态危害评价.结果表明,该海域表层沉积物中重金属Cu含量范围11.4~123.0μg/g,平均值55.3μg/g;Pb含量范围18.4~39.8μg/g,平均值34.7μg/g;Zn含量范围31.8~173.0μg/g,平均值100.0μg/g;Cd含量范围0.06~0.36μg/g,平均值0.14μg/g;As含量范围4.01~9.60μg/g,平均值6.67μg/g;Hg含量范围0.005~0.115μg/g,平均值0.036μg/g.含量分布呈现从湾顶向湾内及湾口逐渐降低,以AH1站和AH5站为最高值;Pb、Cd、As、Hg含量均符合海洋沉积物质量标准的第一类要求,Cu、Zn含量符合沉积物质量标准第一类要求的站位各占了44.4%和77.8%,各元素之间呈明显正相关.单项潜在生态危害系数CdHgAsCuPbZn,潜在生态危害指数评价AH1站属于强生态危害,AH5站为中等生态危害,余下各站点为轻微生态危害,重金属Cd的潜在生态危害最大.AH1站靠近湾顶陆源排污口,AH5站靠近东石陆源排污口,污染强度较其他站位大很多.安海湾表层沉积环境已受到不同程度的重金属污染,近海工业活动和陆源污染物排放是安海湾重金属污染的主要来源.因而,严格控制入海河流和近海经济活动的重金属污染排放,对保障安海湾沉积物的生态环境至关重要.
[Abstract]:According to the investigation of content of 6 kinds of heavy metals in Fujian in August 2014 at 9 sampling stations in Anhai Bay surface sediments, distribution of the trend, evaluation of single factor index of heavy metal content, and the potential ecological risk assessment of the degree of pollution of the sea. The results show that the surface sediments in the sea area of heavy metal Cu in the range of 11.4~123.0 ~ g/g, the average value of 55.3 g/g; Pb in the range of 18.4~39.8 ~ g/g, the average value of 34.7 g/g; Zn in the range of 31.8~173.0 g/g, the average value of 100 g/g; Cd in the range of 0.06~0.36 g/g, the average value of 0.14 g/g; As in the range of 4.01~9.60 g/g, the average value of 6.67 g/g; Hg in the range of 0.005~0.115 g/g, average value 0.036 g/g. content distribution is gradually decreased from the Bay top to the mouth of the Bay, AH1 station and AH5 station is the highest value; Pb, Cd, As, Hg contents are consistent with the standard of marine sediment quality of the first class, Cu, Zn content with the sink Deposit quality standard of first class requirements of stations each accounted for 44.4% and 77.8%, there was a significant positive correlation between the various elements. The potential ecological hazards of single factor CdHgAsCuPbZn, the potential ecological risk index evaluation of AH1 station AH5 station belongs to strong ecological harm, medium ecological harm, the rest of the site for a slight ecological harm, potential ecological hazards of heavy metals Cd the largest.AH1 station near the Bay top land-based sewage outfall, AH5 station near the East land-based sewage outfall, pollution intensity is large. Many other stations Anhai Bay surface sediments have been polluted by heavy metals in different degrees, offshore industry activities and pollutant is the main source of heavy metal pollution in Anhai Bay. Thus, strictly control the emission of heavy metal pollution in the sea river and coastal economic activities, is of vital importance to the security of the Bay sediments ecological environment.

【作者单位】：福建海洋研究所;
【基金】：福建省社会发展重点资助项目(2013Y0009)
【分类号】：X55

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