底泥硝化菌群用于生物毒性测试的初步研究

Preliminary Study on Biotoxicity Test Using Nitrifying Bacteria in Sediment

摘要: 研究了铜离子对底泥和活性污泥硝化活性的抑制作用的差异.结果表明,与活性污泥相比,底泥中的硝化菌对铜离子的敏感性较高,底泥的铜离子半数抑制率IC₅₀为12.43 μmol/L,活性污泥的IC₅₀为46.90 μmol/L.这初步表明用污染物对底泥硝化活性的抑制程度评价污染物的生物毒性是可行的.

Abstract: The inhibition of copper ion on nitrification activity of nitrifying bacteria in sediment and activated sludge were studied.The results showed that the inhibition of copper ion on nitrifying bacteria in sediment was stronger than that in activated sludge.The values of IC₅₀ for sediment and activated sludge were 12.43 μmol/L and 46.90 μmol/L respectively.The experimental results demonstrated that the inhibition of pollutants on nitrification activity of sediment could be used for toxicity evaluation.