铁还原菌联合芬顿氧化降解苯酚的机理研究  

Degradation of Phenol by Iron-reducing Bacteria Combined with Fendun Oxidation

作　　者：高卫国 Gao Weiguo(Shanghai Baofahuanke Technology Co.,Ltd.,Shanghai 200000,China)

机构地区：[1]上海宝发环科技术有限公司,上海200000

出　　处：《科学技术创新》2022年第25期9-12,共4页Scientific and Technological Innovation

摘　　要：以铁还原菌模式菌株Shewanella oneidensis MR-1为研究对象,研究微生物的异化铁还原过程与芬顿氧化联合降解苯酚并实现催化剂循环的可行性。结果发现经MR-1菌株还原的生物矿物(M-水铁矿)作为芬顿氧化铁源催化分解H_(2)O_(2)产生羟基自由基降解苯酚,降解率为82.4%,而Fe^(2+)作为铁源的传统芬顿反应的苯酚降解率为34.7%。以乳酸钠为电子供体,氧化后的M-水铁矿为电子受体,菌株MR-1能还原经芬顿氧化后的M-水铁矿,从而实现循环利用。This study aims to explore the pathway by dissimilatory iron reduction associate with the Fendun oxidation to degrade phenol based on Shewanella oneidensis MR-1,and the possibility to recycle of the catalyst involved in this process.The results show that the ferrihydrite reduced by Shewanella oneidensis MR-1 and which catalyzed the Fenton oxidation to degrade phenol via the production of hydroxyl radicals from decomposition of H_(2)O_(2),by which the degradation rate of phenol as high as 82.4%in ferrihydrite system.However,the degradation rate of phenol in traditional Fenton reaction with Fe^(2+) as iron source is 34.7%.The M-ferrihydrite oxidized in Fendun process can be re-reduced by Shewanella oneidensis MR-1 and subsequently used as catalyst recycled.

关 键 词：苯酚 Shewanella sp. 芬顿氧化 循环 

分 类 号：X703[环境科学与工程—环境工程]