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希瓦氏菌合成并协同纳米钯还原氯硝基苯的研究
孔宛芹,产丹丹,韩锐善,武超
0
(安徽大学资源与环境工程学院,合肥 230601)
摘要:
研究了异化金属还原细菌Shewanella oneidensis MR-1合成金属钯纳米颗粒,用于还原2-氯硝基苯的还原机制、过程和动力学。结果表明,S. oneidensis MR-1可将氯钯酸钠还原成零价钯纳米颗粒(BioPd)。S. oneidensis MR-1和BioPd协同能催化2-氯硝基苯的还原,且S. oneidensis MR-1的醌脱氢酶CymA在还原中发挥重要作用。2-氯硝基苯的还原产物包括2-氯苯胺、硝基苯和苯胺,而苯胺是还原最终产物,说明该体系可同时实现脱氯和硝基还原。动力学分析显示,BioPd-Shewanella 协同催化体系还原2-氯硝基苯的过程符合二级反应动力学过程。
关键词:  希瓦氏菌    纳米颗粒  氯硝基苯
DOI:10.13610/j.cnki.1672-352x.20171017.011
投稿时间:2017-02-21
基金项目:国家自然科学基金项目(31670126), 安徽省自然科学基金青年项目(1508085QB47)和安徽大学青年骨干教师培养项目(J01005132)共同资助。
Biological synthesis of Pd nanoparticles by Shewanella oneidensis MR-1 used for the reduction of chloronitrobenzene
KONG Wanqin,CHAN Dandan,HAN Ruishan,WU Chao
(School of Resources and Environmental Engineering, Anhui University, Hefei 230601)
Abstract:
The biological synthesis of palladium nanoparticle (BioPd) by S. oneidensis MR-1 and its ability to reduce 2-chloronitrobenzene (2-CNB) were investigated. The results showed that BioPd reduced 2-CNB through cooperation with S. oneidensis MR-1, and heavily depended on the quinone dehydrogenase CymA in S. oneidensis MR-1. The reduction products included in nitrobenzene, chloroaniline and aniline, and aniline was the final product, indicating that the synergistically catalytic system could achieve dechlorination and nitro-reduction simultaneously. The reduction of 2-CNB could be described as the second-order kinetics.
Key words:  Shewanella  palladium  nanoparticle  nitrobenzene

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