| 不同填埋时间、不同季节的垃圾渗滤液生物毒性 |
| 摘要点击 2692 全文点击 2200 投稿时间：2009-03-22 修订日期：2009-06-04 |
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| 中文关键词 填埋时间 季节 垃圾渗滤液 嗜热四膜虫 毒性 |
| 英文关键词 landfill age seasons leathate etrahymena thermophila toxicity |
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| 中文摘要 |
| 以武汉市7个城市生活垃圾填埋场渗滤液作为研究对象，探讨不同填埋时间、不同季节渗滤液的生物毒性变化以及理化指标与生物毒性效应的相关性.毒性实验采用嗜热四膜虫（Tetrahymena thermophila）作为试验生物，进行了渗滤液对受试生物的24 h半数致死浓度LC50和生长抑制测定.结果表明，不同填埋时间的渗滤液LC50在0.84%～12.15%之间；随着填埋时间延长，渗滤液LC50有增大的趋势，急性毒性逐渐减小，但渗滤液对 |
| 英文摘要 |
| Leachates from 7 landfill of Wuhan,China were selected to determine the toxicity of leachates of different landfill age and different seasons,and relationships between physical-chemical parameters and toxicity of leachates were also study. Bioassays were conducted recording toxicity against Tetrahymena thermophila as median lethal concentrations (LC50 values) after 24h exposure and growth inhibition. The results show that LC50 values of leachates of different landfill age oscillate between 0.84% and 12.15%,and LC50 values increase and growth inhibitions do not decrease with increase of landfill age. No clear regularity is observed from LC50 values of leachates of different seasons,and LC50 values of leachates of summer are comparatively lower. Growth inhibitions of leachates of spring are the lowest. Physical-chemical parameters of leachates do not correlated with LC50 values,whereas growth inhibitions are dependent on COD,BOD5,NH+4-N and concentrations of diethylhexyl phthalate （DEHP）. |
