| 菌株 Arthrobacter sp. CN2降解对硝基苯酚的特性与动力学 |
| 摘要点击 2446 全文点击 1252 投稿时间：2014-10-26 修订日期：2014-12-10 |
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| 中文关键词 生物降解 对硝基苯酚 Arthrobacter sp. CN2 高盐废水 一级动力学反应 |
| 英文关键词 biodegradation p-nitrophenol Arthrobacter sp. CN2 wastewater with elevated salinity first-order kinetics |
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| 中文摘要 |
| 为研究对硝基苯酚降解菌Arthrobacter sp. CN2在实际生产中的应用潜力,本文分别分析了pH、盐浓度和额外添加碳源对降解效率的影响,同时对降解的动力学方程进行拟合分析. 菌株CN2在pH 7.0~8.0,NaCl浓度60 g ·L-1之间能够高效降解对硝基苯酚,72 h内对50mg ·L-1对硝基苯酚的降解率均大于90%. 同时发现适量添加葡萄糖(0.5%)可显著促进CN2降解对硝基苯酚,与不添加葡萄糖条件下相比,达到90%降解率所需时间缩短了16 h. 当对硝基苯酚浓度低于300 mg ·L-1时,菌株CN2对对硝基苯酚的降解符合一级动力学方程,降解速率常数在0.0217~0.0250之间. 在生物反应器中应用菌株CN2模拟处理工业废水,3 L含对硝基苯酚废水(100 mg ·L-1)在72h的降解率大于90%. 研究表明,菌株Arthrobacter sp. CN2能够高效地降解对硝基苯酚,对于环境有良好适应能力,具有良好的应用前景. |
| 英文摘要 |
| To investigate the application potential of the p-nitrophenol-degrading bacterium Arthrobacter sp. CN2 in practice, the effects of pH, salinity and additional carbon source were determined, and the degradation kinetics of p-nitrophenol was analyzed. Strain CN2 could degrade p-nitrophenol efficiently in a wide range of pH (7.0-8.0) and elevated salinity (0-60g ·L-1). Investigation of additional glucose found that 0.5% of glucose could significantly increase the degrading speed and the time to reach 90% of degradation rate was shortened by 16 hours. These results indicated that strain CN2 could degrade p-nitrophenol efficiently under different conditions and had a great potential for application in practice. |
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