| 沉积物中有机质及金属水合氧化物对γ-666、p,p′-DDT缺氧生物降解性影响 |
| 摘要点击 1443 全文点击 1601 投稿时间：2001-05-30 修订日期：2001-07-06 |
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| 中文关键词 缺氧降解 有机质 金属水合氧化物 γ-666 p,p′-DDT |
| 英文关键词 anaerobic degradation organic matter hydrous metal oxides γ-666 p,p′-DDT |
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| 中文摘要 |
| 通过逐级去除辽河流域沉积物中有机质,水合铁、铝、锰氧化物,考察了沉积物中有机质和金属水合氧化物对)γ-666、p,p＇-DDT的缺氧生物降解的影响.结果表明,γ-666、p,p＇-DDT的缺氧生物降解均符合准一级动力学方程.在无外加碳源的原沉积物中准一级动力学常数分别为0.020d～、0.009 d-.外加碳源后,γ-666、p,p＇-DDT在原沉积物中的准一级动力学常数分别为0.071d-、0.054 d-;在去除有机质的沉积物中为0.047d、0.037 d-;在同时去除有机质和金属水合氧化物的沉积物中为0.067d-、0.059 d-.表明沉积物中的有机质促进了γ-666、p,p'-DDT的缺氧生物降解性.而金属水合氧化物对γ-666、p,p'-DDT的生物降解性有一定抑制. |
| 英文摘要 |
| Effects of organic matter and active Fe, Al, Mn oxides on the anaerobic degradation of γ-666, p,p′-DDT were investigated by means of removing organic matter and hydrous metal oxides in Liaohe River sediments sequentially. The results showed that the anaerobic degradation of γ-666, p,p′-DDT followed pseudo first order kinetics in different sediments; but, the extents and rates of degradation were different, even the other conditions remained same. Anaerobic degradation rates of γ-666, p,p′-DDT were 0.020 d- , 0.009 d- respectively for the sediments without additional carbon resources. However, with additional carbon resources, the anaerobic degradation rates of γ-666, p,p′-DDT were 0.071d- and 0.054d- in the original sediments respectively. After removing organic matter, the rates were decreased to 0.047d-, 0.037 d-. In the sediments removed organic matter and hydrous metal oxides, the rates were increased to 0.067d-, 0.059 d-. This results indicated that organic matter in the sediments accelerated the anaerobic degradation of γ-666 , p,p'-DDT; the hydrous metal oxides inhibited the anaerobic degradation of γ-666 and p,p′-DDT. |
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