【摘要】：通過對水樣、沉積物和背角無齒蚌中汞含量的測定,研究杭埠-豐樂河汞的污染特征,并利用單項污染指數(shù)法、地累積指數(shù)法評估了汞的生態(tài)風險.結果表明: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地表水III類限值.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)排污是主要污染來源.背角無齒蚌中汞、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.背角無齒蚌對汞和甲基汞均有明顯的富集,其組織對汞的積累也具有明顯選擇性(濃度高低依次為:外套膜內臟腮和肌肉).背角無齒蚌中汞含量與水和沉積物中汞含量相關性良好,表明背角無齒蚌作為指示生物其生物監(jiān)測結果可進一步驗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】： 安徽大學資源與環(huán)境工程學院;
【基金】：國家自然科學基金項目(41172121) “十二五”國家水專項(2012ZX07103-004) 安徽省自然科學基金青年項目(1608085QB45); 安徽省高校自然科學研究項目重點項目(KJ2015A090)
【分類號】：X55
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本文編號：2313756