| 垃圾填埋污染场地的微生物变化特征与污染物行为研究 |
| 摘要点击 2981 全文点击 2068 投稿时间：2008-07-21 修订日期：2008-10-20 |
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| 中文关键词 垃圾渗滤液 污染场地 生物降解 微生物活性 |
| 英文关键词 landfill leachate polluted site biodegradation microbial activity |
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| 中文摘要 |
| 通过静态和动态模拟实验研究了垃圾填埋污染场地的微生物变化特征及其与污染物的衰减、形态分布和生物有效性变化之间的关系.结果表明，土壤和细砂中微生物活性随时间均呈先升高后降低的变化趋势，升高阶段其平均增长速率分别达到0.081 d-1和0.022 d-1，而降低阶段其衰减速率分别达到0.009 5 d-1和0.005 1 d-1；COD随时间的衰减与微生物活性变化之间有明显的相关性，其在土壤中的去除率较细砂高30％左右，在砂土中的衰减速率（以O2计）为500 mg/d；氨氮随时间的衰减与微生物活性变化之间在短时间内没有明显的相关性；重金属的形态变化和生物有效性与其本身的性质、氧化还原环境等因素有一定的关系. |
| 英文摘要 |
| Static and dynamic simulated experiments were conducted to investigate the characteristics of bacterial variation in landfill leachate polluted site，and relations between attenuation，species-distribution， bioavailability of pollutants and bacterial activity. Results indicated that bacterial activity in soil and fine sand showed a trend of increase first and then decreased with time; the increase rate was up to 0.081 d-1 and 0.022 d-1 at the increasing stage，and the decrease rate reached 0.009 5 d-1 and 0.005 1 d-1 at the decreasing stage，respectively. A clear correlation between attenuation of COD and variation of bacterial activity with time was shown; the removal efficiency of COD in soil was about 30％ higher than that in fine sand，and the attenuation rate of COD was 500 mg/d in fine sand approximately. There was no clear correlation between ammonium-nitrogen attenuation and bacterial activity in short term with time. Variation of heavy metals species and bioavailability was related to their properties，redox environment，and other factors. |
