| pH值对"Fe0-厌氧微生物"体系去除2,4,6-三氯酚过程的影响 |
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| 引用本文： | 吴金钢,戴友芝,郭丽丽,汪桂芝,李小娜.pH值对"Fe0-厌氧微生物"体系去除2,4,6-三氯酚过程的影响[J].环境工程学报,2013,7(4):1273-1278. |
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| 作者姓名： | 吴金钢 戴友芝 郭丽丽 汪桂芝 李小娜 |
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| 作者单位： | 湘潭大学化工学院环境科学与工程系,湘潭,411105 |
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| 基金项目： | 国家自然科学基金资助项目(20977072) |
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| 摘 要： | 考察了pH值对"Fe0-厌氧微生物"体系降解2,4,6,-三氯酚(2,4,6-TCP)效果的影响,结果表明:pH值是影响"Fe0-厌氧微生物"体系降解2,4,6-TCP效果的重要参数,初始pH值直接影响微生物活性和铁腐蚀,进而影响过程pH值变化,反过来又影响铁腐蚀和微生物活性,pH 7.0～9.0的中性偏碱范围较适于厌氧微生物生长。Fe0与微生物对目标污染物的降解具有协同促进作用,其协同促进机制表现在3方面:Fe0与微生物对体系过程pH值具有互补调节作用,可将体系的pH值调节值适于微生物生长的中性范围;Fe0腐蚀产生的Fe2+和H2可为微生物代谢提供电子对和营养物质,从而促进生物还原脱氯的进行;Fe0的腐蚀过程直接对氯代有机物还原脱氯,而微生物又可促进Fe0腐蚀。
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| 关 键 词： | 2 4 6-三氯酚 厌氧微生物 零价铁 降解 |
| 收稿时间： | 2/9/2012 12:00:00 AM |
Effect of pH values on process for removal of 2,4,6-trichlorophenol by Fe0-anaerobic microbe system |
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| Wu Jingang,Dai Youzhi,Guo Lili,Wang Guizhi and Li Xiaona.Effect of pH values on process for removal of 2,4,6-trichlorophenol by Fe0-anaerobic microbe system[J].Techniques and Equipment for Environmental Pollution Control,2013,7(4):1273-1278. |
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| Authors: | Wu Jingang Dai Youzhi Guo Lili Wang Guizhi and Li Xiaona |
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| Affiliation: | Department of Environmental Science and Engineering, School of Chemical Engineering, Xiangtan University, Xiangtan 411105, China;Department of Environmental Science and Engineering, School of Chemical Engineering, Xiangtan University, Xiangtan 411105, China;Department of Environmental Science and Engineering, School of Chemical Engineering, Xiangtan University, Xiangtan 411105, China;Department of Environmental Science and Engineering, School of Chemical Engineering, Xiangtan University, Xiangtan 411105, China;Department of Environmental Science and Engineering, School of Chemical Engineering, Xiangtan University, Xiangtan 411105, China |
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| Abstract: | The effect of pH value on the degradation effect of 2,4,6-trichlorophenol (2,4,6-TCP) by "Fe0-anaerobic microbe" system was observed and studied, and results show that pH value is an important parameter for removing 2,4,6-TCP by "Fe0-anaerobic microbe" system. Initial pH value directly affects microorganism activity and iron corrosion, and then affects the change of pH value in the process, which, in turn, influences microorganism activity and iron corrosion. The optimal range of pH value for anaerobic microorganism growth is 7.0~9.0. Fe0 and microorganism have a synergistic promoting effect on the reductive dechlorination of 2,4,6-TCP. The mechanism of the synergy shows in three aspects: Fe0 and microbial play complementary role to regulate the pH value to neutral range which is suitable for microbial growth; Fe2+ and H2 produced by the corrosion of Fe0 serves as electron donor and nutrient substance for microbial metabolism, thus promoting the transformation of 2,4,6-TCP; Fe0 corrosion makes chlorinated organics degraded by reductive dechlorination directly, and microbial promotes the corrosion. |
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| Keywords: | 2 4 6-trichlorophenol anaerobic microorganism zero-valent iron degradation |
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