| 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 钯 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。 |
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| 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 |
