Immobilized redox mediators on modified biochar and their role on azo dye biotransformation in anaerobic biological systems: Mechanisms, biodegradation pathway and theoretical calculation
Immobilized redox mediators on modified biochar and their role on azo dye biotransformation in anaerobic biological systems: Mechanisms, biodegradation pathway and theoretical calculation
复制标题
改性生物炭上的固定化氧化还原介体及其在厌氧生物系统中偶氮染料生物转化中的作用：机制、生物降解途径和理论计算
DOI：
10.1016/j.cej.2021.130300
复制
发表时间：
2021-05
影响因子：
15.1
通讯作者：
Ren Nan-Qi
中科院分区：
文献类型：
--
作者：
Wang Guang-Yuan;Yang Shan-Shan;Ding Jie;Chen Cheng-Xin;Zhong Le;Ding Lan;Ma Ming;Sun Guo-Sheng;Huang Zong-Liang;Ren Nan-Qi
In this study, a novel solid-phase redox mediator (RM) was manufactured via immobilizing anthraquinone-2-sulfonate (AQS) onto modified biochar (BC). The RM was used to enhance the anaerobic granular sludge (AGS) driven anaerobic biodegradation of azo dyes. Prepared at the optimal pyrolysis temperature of 550 ℃, the AQS modified BC550 exhibits a higher adsorption capacity of about 12.81% toward AQS compared to that of commercial granular activated carbon (GAC). X-ray photoelectron spectroscopy and Fourier transform infrared spectroscopy analyses showed that BC550-AQS contained more redox moieties (quinone and C = O) than GAC-AQS, indicating that the BC550 is suitable as a carrier of immobilized AQS. During the 36-h reaction, incubation of BC550-AQS as the solid-phase RM obviously enhanced the capacity of AGS (BC550-AQS + AGS), evidenced by the maximum percentage of Reactive Red 2 (RR2) decolorization (92.27%), which increased up by 80.55% and 14.48% compared to the controls (BC550-AQS, 17.95%) and (GAC-AQS + AGS, 78.61%). Besides, BC550-AQS exhibits good reusability and a higher RR2 decolorization rate (per AQS dosage) over 15 consecutive cycles. The mechanism of biodegradation pathway of RR2 initiated by BC550-AQS was studied using liquid chromatography-mass spectrometry and chemical computation. Density-functional theory calculations successfully predict that the RR2 biodegradation pathway mainly includes azo bond cleavage and electron attraction with a stronger electron affinity. This work not only proposes a deep insight into the biodegradation pathway of RR2 by employing BC550-AQS in an anaerobic biological system but also develops effective solid-phase RMs for efficient removal of contaminants from wastewaters by biological treatment.
登录
查看更多内容
氧化还原介体修饰的新型功能生物载体对偶氮染料脱色的促进作用及机理
影响因子：
3.6
作者：
Guo, Jianbo;Kang, Li;Lian, Jing;Yang, Jingliang;Yan, Bin;Li, Zaixing;Liu, Chun;Yue, Lin
通讯作者：
Yue, Lin
生物炭在氧化还原介导反应中的应用
影响因子：
11.4
作者：
Yuan Yong;Bolan Nanthi;Prevoteau Antonin;Vithanage Meththika;Biswas Jayanta Kumar;Ok Yong Sik;Wang Hailong
通讯作者：
Wang Hailong
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
DOI：
10.1007/s11157-016-9404-z
发表时间：
2016-08
期刊：
Reviews in Environmental Science and Bio/Technology
影响因子：
--
作者：
Ruobin Dai;Xiaoguang Chen;Chengyu Ma;Xinyi Xiang;Gang Li
通讯作者：
Ruobin Dai;Xiaoguang Chen;Chengyu Ma;Xinyi Xiang;Gang Li
三种废弃生物质生物炭的供电子能力及其结构依赖性的表征和定量
影响因子：
8.8
作者：
Zhang Yue;Xu Xiaoyun;Cao Lingzhi;Ok Yong Sik;Cao Xinde
通讯作者：
Cao Xinde