安海灣表層沉積物重金屬含量分布特征
本文選題:海洋化學(xué) 切入點(diǎn):表層沉積物 出處:《應(yīng)用海洋學(xué)學(xué)報(bào)》2017年01期
【摘要】:根據(jù)2014年8月福建安海灣9個(gè)站位表層沉積物中6種重金屬的含量調(diào)查,探討它們的分布趨勢(shì),對(duì)重金屬含量進(jìn)行單因子指數(shù)評(píng)價(jià),同時(shí)對(duì)該海域污染程度進(jìn)行潛在生態(tài)危害評(píng)價(jià).結(jié)果表明,該海域表層沉積物中重金屬Cu含量范圍11.4~123.0μg/g,平均值55.3μg/g;Pb含量范圍18.4~39.8μg/g,平均值34.7μg/g;Zn含量范圍31.8~173.0μg/g,平均值100.0μg/g;Cd含量范圍0.06~0.36μg/g,平均值0.14μg/g;As含量范圍4.01~9.60μg/g,平均值6.67μg/g;Hg含量范圍0.005~0.115μg/g,平均值0.036μg/g.含量分布呈現(xiàn)從灣頂向?yàn)硟?nèi)及灣口逐漸降低,以AH1站和AH5站為最高值;Pb、Cd、As、Hg含量均符合海洋沉積物質(zhì)量標(biāo)準(zhǔn)的第一類要求,Cu、Zn含量符合沉積物質(zhì)量標(biāo)準(zhǔn)第一類要求的站位各占了44.4%和77.8%,各元素之間呈明顯正相關(guān).單項(xiàng)潛在生態(tài)危害系數(shù)CdHgAsCuPbZn,潛在生態(tài)危害指數(shù)評(píng)價(jià)AH1站屬于強(qiáng)生態(tài)危害,AH5站為中等生態(tài)危害,余下各站點(diǎn)為輕微生態(tài)危害,重金屬Cd的潛在生態(tài)危害最大.AH1站靠近灣頂陸源排污口,AH5站靠近東石陸源排污口,污染強(qiáng)度較其他站位大很多.安海灣表層沉積環(huán)境已受到不同程度的重金屬污染,近海工業(yè)活動(dòng)和陸源污染物排放是安海灣重金屬污染的主要來源.因而,嚴(yán)格控制入海河流和近海經(jīng)濟(jì)活動(dòng)的重金屬污染排放,對(duì)保障安海灣沉積物的生態(tài)環(huán)境至關(guān)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.
【作者單位】: 福建海洋研究所;
【基金】:福建省社會(huì)發(fā)展重點(diǎn)資助項(xiàng)目(2013Y0009)
【分類號(hào)】:X55
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