| 用TTC与INT-电子传递体系活性表征重金属对污泥活性的影响 |
| 摘要点击 3968 全文点击 2772 投稿时间：2004-01-15 修订日期：2004-03-12 |
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| 中文关键词 活性污泥 电子传递体系活性 重金属 碘硝基四氮唑 2,3,5-氯化三苯基四氮唑 |
| 英文关键词 activated sludge electron transport system activity heavy metals INT TTC |
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| 中文摘要 |
| 研究了不同浓度的Cu2+、Zn2+、Cd2+、Hg2+、Ni2+、Pb2+和Ag+对污泥TTC和INT 电子传递体系活性产生的影响 ,比较了这 2个参数在表征污泥活性受重金属抑制时的灵敏性 .结果表明 ,各种重金属抑制污泥TTC 电子传递体系活性的IC50小于抑制INT 电子传递体系活性的IC50,TTC 电子传递体系活性反映重金属毒性作用的灵敏性大于INT 电子传递体系活性 .实验的重金属离子呈现出不同的毒性作用 ,以TTC 电子传递体系活性为评价参数 ,毒性顺序为 :Hg2+>Cd2+>Cu2+>Ag+>Zn2+>Ni2+>Pb2+,以INT 电子传递体系活性为评价参数 ,毒性顺序为 :Hg2+>Ag+>Cu2+>Cd2+>Zn2+>Ni2+>Pb2+. |
| 英文摘要 |
| The effects of Cu2+, Zn2+, Cd2+, Hg2+, Ni2+, Pb2+and Ag+ on TTC and INT-electron transport system activity are studied and the sensitivities of TTC and INT-electron transport system activity to seven tested heavy metals are compared to evaluate both the parameters for assessing heavy metal inhibition of activated sludge. The median inhibitory concentration (IC50) of seven tested heavy metals measured via TTC-electron transport system activity is less than that measured via INT-electron transport system activity, which indicates that the INT-electron transport system activity is less sensitive to heavy metals than the TTC-electron transport system activity. The ranking of tested heavy metals in order of decreasing toxicity based on TTC-electron transport system activity was Hg2+, Cd2+, Cu2+, Ag+, Zn2+, Ni2+ and Pb2+, and the ranking based on INT-electron transport system activity was Hg2+, Ag+, Cu2+, Cd2+, Zn2+, Ni2+ and Pb2+. |
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