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环境化学  2015 

硝基苯厌氧降解过程中Fe0的促进作用

Keywords: 零价铁,硝基苯,厌氧,降解

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Abstract:

尝试在硝基苯生物厌氧降解过程中,添加零价铁实现电子催化与生物代谢的协同作用,结果发现零价铁能够促进硝基苯的厌氧转化并主要生成苯胺,初始浓度为240.00mg·l-1的硝基苯废水,当厌氧微生物浓度为5000.00mg·l-1左右时,在2L的试验液中,当零价铁投加量由0.50g增加到5.00g时,硝基苯的转化率和苯胺的产生量急剧增加;零价铁的投加量为5.00g时与不加零价铁相比,硝基苯的转化率提高了2.43倍,苯胺的生成量提高了2.12倍;通过设计Fe0,Fe2+,Fe3+及Fe3O4的对比实验,证明零价铁的作用主要表现为其腐蚀形成Fe2+的过程为硝基苯的厌氧生物转化提供了电子以及该过程中生成的Fe2+和Fe3+的生物营养作用.

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