A quasi-homogeneous catalysis and electron transfer chain for biodecolorization of azo dye by immobilized phenazine redox mediator
A quasi-homogeneous catalysis and electron transfer chain for biodecolorization of azo dye by immobilized phenazine redox mediator
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固定化吩嗪氧化还原介体用于偶氮染料生物脱色的准均相催化和电子转移链
DOI：
10.1016/j.ibiod.2017.09.018
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发表时间：
2018
影响因子：
4.8
通讯作者：
Xie Zhen
中科院分区：
文献类型：
--
作者：
Yang Dan;Guo Jianbo;Lu Caicai;Song Yuanyuan;Li Haiyan;Chen Zhi;Xie Zhen
由于电子转移的限制和效率，许多不同污染物的厌氧生物还原速率是缓慢的。在这项研究中，吩嗪固定在亲水性材料进行了测试作为氧化还原介体（RM）和准均相催化，以减少传质限制，提高脱色效率。通过化学反应将中性红（NR）固定到聚丙烯酸（PAA）水凝胶上，得到了含量高达3.58 mmol cm-3 PAA的NR。新型功能材料（PAA-NR）具有高孔隙率和水含量（92- 98%，w/v）的三维聚合物网络，与对照相比，其厌氧脱色效率高13.5倍。PAA-NR水凝胶脱色的最佳条件为40 °C和pH 8.0。此外，还通过6种缓蚀剂的试验，探讨了电子转移脱色机理。NADH和FAD链参与了脱色过程。PAA-NR作为一种不溶性氧化还原介质，通过介导偶氮还原酶与活性艳红K-2BP之间的电子转移，促进了K-2BP的还原，提高了电子转移和脱色效率。该固定化技术扩大了RM的应用范围，并对污染物的厌氧转化表现出较高的催化活性。
The anaerobic bio-reduction rate of many different contaminants is slow due to the limitations and efficiencies of electron transfer. In this study, the phenazine immobilized in hydrophilic material was tested as a redox mediator (RM) and quasi-homogeneous catalysis to reduce the mass transfer limitation and increase the decolorization efficiency. Neutral red (NR) was immobilized to polyacrylic acid (PAA) hydrogel by chemical reaction and obtained a content of NR as high as 3.58 mmol cm−3of PAA. The novel functional material (PAA-NR), with three-dimensional polymeric network with high porosity and water contents (92–98%, w/v) achieved 13.5 fold higher in the anaerobic decolorization efficiency compared to the control. The optimal conditions for decolorization with PAA-NR hydrogel were 40 °C and pH 8.0. Additionally, the electron transfer mechanism of decolorization was investigated by testing with six inhibitors. NADH and FAD chains were involved in the decolorization process. PAA-NR acted as an insoluble redox mediator to accelerate Reactive Brilliant Red K-2BP (K-2BP) reduction through mediating electron transfer between the azoreductase and K-2BP, resulting in higher electron transfer and decolotization efficiency. This immobilizing technology extended the RM application and demonstrated high catalytic activity on pollutant anaerobic transformation.
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DOI：
10.1007/698_2009_46
发表时间：
2010-01-01
期刊：
BIODEGRADATION OF AZO DYES
影响因子：
--
作者：
Guo, Jianbo;Kang, Li;Yang, Jingliang
通讯作者：
Yang, Jingliang
影响因子：
3.4
作者：
H. J. Amezquita-Garcia;E. Razo-Flores;F. Cervantes;J. Rangel-méndez
通讯作者：
H. J. Amezquita-Garcia;E. Razo-Flores;F. Cervantes;J. Rangel-méndez
影响因子：
11.4
作者：
Hong Lu;Ji-ti Zhou;Jing Wang;Weilei Si;Hu Teng;Guangfei Liu
通讯作者：
Hong Lu;Ji-ti Zhou;Jing Wang;Weilei Si;Hu Teng;Guangfei Liu
影响因子：
11.4
作者：
J. Lian;Jianbo Guo;G. Feng;Guangfei Liu;Jing-liang Yang;Chun Liu;Zaixing Li;Lin Yue;Li-jun Zhao
通讯作者：
J. Lian;Jianbo Guo;G. Feng;Guangfei Liu;Jing-liang Yang;Chun Liu;Zaixing Li;Lin Yue;Li-jun Zhao
影响因子：
13.6
作者：
Wang Jing;Li Lihua;Zhou Ji-ti;Lu Hong;Liu Guangfei;Jin Ruofei;Yang Fenglin
通讯作者：
Wang Jing;Li Lihua;Zhou Ji-ti;Lu Hong;Liu Guangfei;Jin Ruofei;Yang Fenglin