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Shewanella Drive Fe(III) Reduction to Promote Electro-Fenton Reactions and Enhance Fe Inner-Cycle
ACS ES&T Water ( IF 4.8 ) Pub Date : 2020-12-18 , DOI: 10.1021/acsestwater.0c00126
Mingyue Zhao 1 , Zhicheng Cui 1 , Liang Fu 1 , Fabrice Ndayisenga 2 , Dandan Zhou 1
ACS ES&T Water ( IF 4.8 ) Pub Date : 2020-12-18 , DOI: 10.1021/acsestwater.0c00126
Mingyue Zhao 1 , Zhicheng Cui 1 , Liang Fu 1 , Fabrice Ndayisenga 2 , Dandan Zhou 1
Affiliation
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The slow reduction of Fe(III) to Fe(II) in electro-Fenton technology limits pollutant removal and causes Fe sludge production. This study hypothesizes that Shewanella, a dissimilatory iron-reducing bacteria, can accelerate the iron reduction of the Fenton reaction. A Shewanella biofilm coupled with Fe2O3 coated electrode (F/S) was used to drive the electro-Fenton reaction, and compared the results with the singlet Fe2O3 (F) anode and Shewanella biofilm anode (S). Meanwhile, dissolved oxygen (DO) is studied as an important influencing factor. The suitable DO was verified at ∼2 mg/L, phenol removal of F/S was 67% higher than that of the sum of three other singlet systems. The chemical oxygen demand (COD) removal was 72% and 50% higher than that of F and S, respectively. F/S corrosion current (Icorr) was 6.3 times higher than F, and induced hematite to transform into Fe2PO5 and FeOOH on the anode. Long-term operation showed that phenol was almost 100% removed for F/S; COD removal was generally 20% higher than F; thus, the toxicity of the effluent could be significantly decreased. The total Fe loss did not exceed 10% at the end of operation. This paper provides a feasibly novel method for electro-Fenton reaction, by employing Fe-reducing bacteria.
中文翻译：
希瓦氏菌驱动Fe（III）还原以促进电子芬顿反应并增强Fe内环
Fe-Fenton技术中将Fe（III）缓慢还原为Fe（II）限制了污染物的去除并导致了Fe污泥的产生。这项研究假设希瓦氏菌是一种异化的还原铁细菌，可以促进芬顿反应的铁还原。用Shewanella生物膜与Fe 2 O 3包覆电极（F / S）耦合来驱动电Fenton反应，并将结果与单线态Fe 2 O 3（F）阳极和Shewanella生物膜阳极（S）进行比较。同时，溶解氧（DO）被研究为重要的影响因素。验证了合适的溶解氧为〜2 mg / L，苯酚的去除率为F /S比其他三个单重态系统的总和高67％。去除化学需氧量（COD）分别比F和S高72％和50％。F / S腐蚀电流（I corr）是F的6.3倍，并导致赤铁矿在阳极上转变为Fe 2 PO 5和FeOOH。长期运行表明，苯酚几乎可以100％去除F / S了。COD去除率通常比F高20％；因此，废水的毒性可以大大降低。在操作结束时，铁的总损失不超过10％。本文通过利用还原铁细菌，提供了一种可行的新型电子芬顿反应方法。
更新日期：2020-12-18
中文翻译：
希瓦氏菌驱动Fe（III）还原以促进电子芬顿反应并增强Fe内环
Fe-Fenton技术中将Fe（III）缓慢还原为Fe（II）限制了污染物的去除并导致了Fe污泥的产生。这项研究假设希瓦氏菌是一种异化的还原铁细菌，可以促进芬顿反应的铁还原。用Shewanella生物膜与Fe 2 O 3包覆电极（F / S）耦合来驱动电Fenton反应，并将结果与单线态Fe 2 O 3（F）阳极和Shewanella生物膜阳极（S）进行比较。同时，溶解氧（DO）被研究为重要的影响因素。验证了合适的溶解氧为〜2 mg / L，苯酚的去除率为F /S比其他三个单重态系统的总和高67％。去除化学需氧量（COD）分别比F和S高72％和50％。F / S腐蚀电流（I corr）是F的6.3倍，并导致赤铁矿在阳极上转变为Fe 2 PO 5和FeOOH。长期运行表明，苯酚几乎可以100％去除F / S了。COD去除率通常比F高20％；因此，废水的毒性可以大大降低。在操作结束时，铁的总损失不超过10％。本文通过利用还原铁细菌，提供了一种可行的新型电子芬顿反应方法。
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