巢湖杭埠-豐樂(lè)河汞的污染特征及生態(tài)風(fēng)險(xiǎn)
發(fā)布時(shí)間：2018-11-06 08:35
【摘要】：通過(guò)對(duì)水樣、沉積物和背角無(wú)齒蚌中汞含量的測(cè)定,研究杭埠-豐樂(lè)河汞的污染特征,并利用單項(xiàng)污染指數(shù)法、地累積指數(shù)法評(píng)估了汞的生態(tài)風(fēng)險(xiǎn).結(jié)果表明:水樣總汞的濃度為0.04~0.20μg/L(均值為0.10μg/L),H5、H9、F2、S4和S5處水樣中汞含量超過(guò)地表水III類(lèi)限值.沉積物中汞、甲基汞含量分別為29.13~251.49μg/kg(均值為65.42μg/kg)和0.22~3.31μg/kg(均值為0.68μg/kg),H5、H9和F2處沉積物中汞為輕度污染,S4、S5為偏中度污染,工業(yè)排污是主要污染來(lái)源.背角無(wú)齒蚌中汞、甲基汞含量分別為101.34~171.15μg/kg(干重)和54.22~89.63μg/kg(干重),均符合GB18406.4-2001中汞的限量要求.背角無(wú)齒蚌對(duì)汞和甲基汞均有明顯的富集,其組織對(duì)汞的積累也具有明顯選擇性(濃度高低依次為:外套膜內(nèi)臟腮和肌肉).背角無(wú)齒蚌中汞含量與水和沉積物中汞含量相關(guān)性良好,表明背角無(wú)齒蚌作為指示生物其生物監(jiān)測(cè)結(jié)果可進(jìn)一步驗(yàn)證水和沉積物中的汞污染水平.
[Abstract]:The mercury pollution characteristics of Hangbu-Fengle River were studied by the determination of mercury content in water samples, sediments and mussels. The ecological risk of mercury was evaluated by single pollution index method and ground accumulation index method. The results show that the concentration of total mercury in water samples is 0.04 ~ 0.20 渭 g / L (mean is 0.10 渭 g / L), and the mercury content in water samples at H _ (5) H _ (9) F _ (2) S _ (4) and S _ (5) exceeds the III limit of surface water. The concentrations of methylmercury in sediments were 29.13 ~ 251.49 渭 g/kg (mean 65.42 渭 g/kg) and 0.22 ~ 3.31 渭 g/kg (mean 0.68 渭 g/kg) respectively. Industrial sewage is the main source of pollution. The content of methylmercury in mussels was 101.34 渭 g/kg (dry weight) and 54.22C 89.63 渭 g/kg (dry weight), which met the limit requirement of mercury in GB18406.4-2001. Both mercury and methylmercury were significantly enriched in mussel, and its tissues were also highly selective for mercury accumulation (the concentration was in order of visceral gills and muscles). There was a good correlation between mercury content and mercury content in water and sediment, which indicated that the biological monitoring results of mussel could further verify the mercury pollution level in water and sediment.
【作者單位】： 安徽大學(xué)資源與環(huán)境工程學(xué)院;
【基金】：國(guó)家自然科學(xué)基金項(xiàng)目(41172121) “十二五”國(guó)家水專(zhuān)項(xiàng)(2012ZX07103-004) 安徽省自然科學(xué)基金青年項(xiàng)目(1608085QB45); 安徽省高校自然科學(xué)研究項(xiàng)目重點(diǎn)項(xiàng)目(KJ2015A090)
【分類(lèi)號(hào)】：X55
，
本文編號(hào)：2313756
[Abstract]:The mercury pollution characteristics of Hangbu-Fengle River were studied by the determination of mercury content in water samples, sediments and mussels. The ecological risk of mercury was evaluated by single pollution index method and ground accumulation index method. The results show that the concentration of total mercury in water samples is 0.04 ~ 0.20 渭 g / L (mean is 0.10 渭 g / L), and the mercury content in water samples at H _ (5) H _ (9) F _ (2) S _ (4) and S _ (5) exceeds the III limit of surface water. The concentrations of methylmercury in sediments were 29.13 ~ 251.49 渭 g/kg (mean 65.42 渭 g/kg) and 0.22 ~ 3.31 渭 g/kg (mean 0.68 渭 g/kg) respectively. Industrial sewage is the main source of pollution. The content of methylmercury in mussels was 101.34 渭 g/kg (dry weight) and 54.22C 89.63 渭 g/kg (dry weight), which met the limit requirement of mercury in GB18406.4-2001. Both mercury and methylmercury were significantly enriched in mussel, and its tissues were also highly selective for mercury accumulation (the concentration was in order of visceral gills and muscles). There was a good correlation between mercury content and mercury content in water and sediment, which indicated that the biological monitoring results of mussel could further verify the mercury pollution level in water and sediment.
【作者單位】： 安徽大學(xué)資源與環(huán)境工程學(xué)院;
【基金】：國(guó)家自然科學(xué)基金項(xiàng)目(41172121) “十二五”國(guó)家水專(zhuān)項(xiàng)(2012ZX07103-004) 安徽省自然科學(xué)基金青年項(xiàng)目(1608085QB45); 安徽省高校自然科學(xué)研究項(xiàng)目重點(diǎn)項(xiàng)目(KJ2015A090)
【分類(lèi)號(hào)】：X55
，
本文編號(hào)：2313756
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