Electrochemical reduction of bromate using noble metal-free nanoscale zero-valent iron immobilized activated carbon fiber electrode

被引:38
作者
Yao, Fubing [1 ,2 ]
Yang, Qi [1 ,2 ]
Sun, Jian [1 ,2 ]
Chen, Fei [3 ]
Zhong, Yu [4 ]
Yin, Huanyu [1 ,2 ]
He, Li [1 ,2 ]
Tao, Ziletao [1 ,2 ]
Pi, Zhoujie [1 ,2 ]
Wang, Dongbo [1 ,2 ]
Li, Xiaoming [1 ,2 ]
机构
[1] Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Peoples R China
[2] Hunan Univ, Key Lab Environm Biol & Pollut Control, Minist Educ, Changsha 410082, Peoples R China
[3] Univ Sci & Technol China, Dept Chem, CAS Key Lab Urban Pollutant Convers, Hefei 230026, Peoples R China
[4] Hunan Res Acad Environm Sci, Key Lab Water Pollut Control Technol, Changsha 410004, Peoples R China
基金
中国博士后科学基金; 中国国家自然科学基金;
关键词
Bromate reduction; Noble metal-free electrode; Electrocatalysis; Essential reaction parameters; Reaction mechanism; NITRATE REDUCTION; ELECTROCATALYTIC REDUCTION; EFFICIENT REMOVAL; AQUEOUS-SOLUTION; PASTE ELECTRODE; DRINKING-WATER; KINETICS; PERCHLORATE; DEGRADATION; PARTICLES;
D O I
10.1016/j.cej.2019.123588
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Bromate (BrO3-) is a disinfection by-product in drinking water and has been proven to be potentially carcinogenic to humans. Herein, electrocatalytic BrO3- reduction using a noble metal-free nanoscale zero-valent iron immobilized activated carbon fiber (nZVI/ACF) electrode was investigated. The operating conditions including Fe content, initial solution pH, applied current intensity, and initial Br-3(-) concentration were optimized. 94.2% of BrO3- (1.22 mu M) was removed and completely transformed into bromide (Br-) within 90 min by 3.0%-nZVI/ ACF at the applied current intensity 10 mA. The electrocatalytic BrO3- reduction could be achieved under a wide dissolved oxygen (DO) (0.5-7.8 mg L-1) and pH (3.0-10.0), and the decreasing DO and pH was favorable to the electrocatalytic reaction. The mechanism study demonstrated that the electrocatalytic Bro(3)(-) reduction was accomplished via the direct reduction of nZVI (31.8%), electrocatalytic reduction by nZVI (41.9%) and ACF (26.3%). nZVI/ACF electrode could maintain its high electrocatalytic activity after five successive cycles. The experimental results suggested that nZVI/ACF could achieve the fast and effective removal of Bro(3)(-) and provide a new direction to the application of nZVI.
引用
收藏
页数:9
相关论文
共 46 条
[1]   Influence of Riboflavin on Nanoscale Zero-Valent Iron Reactivity during the Degradation of Carbon Tetrachloride [J].
Bae, Sungjun ;
Lee, Woojin .
ENVIRONMENTAL SCIENCE & TECHNOLOGY, 2014, 48 (04) :2368-2376
[2]   Resolving surface chemical states in XPS analysis of first row transition metals, oxides and hydroxides: Cr, Mn, Fe, Co and Ni [J].
Biesinger, Mark C. ;
Payne, Brad P. ;
Grosvenor, Andrew P. ;
Lau, Leo W. M. ;
Gerson, Andrea R. ;
Smart, Roger St. C. .
APPLIED SURFACE SCIENCE, 2011, 257 (07) :2717-2730
[3]   Bromate environmental contamination: Review of impact and possible treatment [J].
Butler, R ;
Godley, A ;
Lytton, L ;
Cartmell, E .
CRITICAL REVIEWS IN ENVIRONMENTAL SCIENCE AND TECHNOLOGY, 2005, 35 (03) :193-217
[4]   Critical Review of Pd-Based Catalytic Treatment of Priority Contaminants in Water [J].
Chaplin, Brian P. ;
Reinhard, Martin ;
Schneider, William F. ;
Schueth, Christoph ;
Shapley, John R. ;
Strathmann, Timothy J. ;
Werth, Charles J. .
ENVIRONMENTAL SCIENCE & TECHNOLOGY, 2012, 46 (07) :3655-3670
[5]   Photo-reduction of bromate in drinking water by metallic Ag and reduced graphene oxide (RGO) jointly modified BiVO4 under visible light irradiation [J].
Chen, Fei ;
Yang, Qi ;
Zhong, Yu ;
An, Hongxue ;
Zhao, Jianwei ;
Xie, Ting ;
Xu, Qiuxiang ;
Li, Xiaoming ;
Wang, Dongbo ;
Zeng, Guangming .
WATER RESEARCH, 2016, 101 :555-563
[6]   Carcinogenicity of potassium bromate administered in the drinking water to male B6C3F1 mice and F344/N rats [J].
DeAngelo, AB ;
George, MH ;
Kilburn, SR ;
Moore, TM ;
Wolf, DC .
TOXICOLOGIC PATHOLOGY, 1998, 26 (05) :587-594
[7]   Electrocatalytic reduction of bromate ion using a polyaniline-modified electrode An efficient and green technology for the removal of BrO3- in aqueous solutions [J].
Ding, Liang ;
Li, Qin ;
Cui, Hao ;
Tang, Rong ;
Xu, Hui ;
Xie, Xianchuan ;
Zhai, Jianping .
ELECTROCHIMICA ACTA, 2010, 55 (28) :8471-8475
[8]   Catalytic Bromate Removal from Water by Using Activated Carbon Supported with Ruthenium (AC/Ru) Catalyst [J].
Dong, Zijun ;
Sun, Feiyun ;
Dong, Wenyi ;
Jiang, Chenchun .
ENVIRONMENTAL ENGINEERING SCIENCE, 2018, 35 (03) :176-184
[9]   Highly active and durable carbon electrocatalyst for nitrate reduction reaction [J].
Duan, Weijian ;
Li, Ge ;
Lei, Zhenchao ;
Zhu, Tonghe ;
Xue, Yuzhou ;
Wei, Chaohai ;
Feng, Chunhua .
WATER RESEARCH, 2019, 161 :126-135
[10]   Strategies to enhance the stability of nanoscale zero-valent iron (NZVI) in continuous BrO3- reduction [J].
Hamid, Shanawar ;
Abudanash, Damira ;
Han, Seunghee ;
Kim, Jong R. ;
Lee, Woojin .
JOURNAL OF ENVIRONMENTAL MANAGEMENT, 2019, 231 :714-725