A novel biochar electrode for efficient electroreduction of nitrate: Selective and regulation of halogen. (February 2022)

• Record Type: Journal Article
• Authors: Zhang, Zhe; Ma, Wei; Hu, Jinglu; Xin, Gang; Chen, Zhen; Wan, Chunxiang; Wang, Shuang; Zhang, Qi
• Is Part Of: Chemosphere. Volume 288:Part 2(2022)
• Publication Date: 2022-02
• Subjects: Biochar electrode -- Nitrate reduction -- Denitrification: halogen; Pollution -- Periodicals; Pollution -- Physiological effect -- Periodicals; Environmental sciences -- Periodicals; Atmospheric chemistry -- Periodicals; 551.511
• DOI: 10.1016/j.chemosphere.2021.132400
• Languages: English
• ISSNs: 0045-6535

Abstract

Abstract: A novel biochar electrode Bio-Fe3 O4 /CF used for electroreduction of nitrate was prepared by the hydrothermal synthesis method. The results showed that the growth of spherical Fe3 O4 on the surface of smooth biochar can significantly increase the nitrate reduction rate. Besides, the presence of Cl and Br in the solution could promote the conversion of NH4 + to N2, thereby regulating the element nitrogen in the solution. Mechanistic analysis showed that the interconversion of Fe (II) and Fe (III) facilitates the transfer of electrons to nitrate. This study not only provides a biochar electrode material for the efficient removal of nitrate but also simply reveals regulation of halogen in solution, which provides a particular theoretical and data basis for nitrate removal. Graphical abstract: Image 1 Highlights: A novel electrode was prepared by biochar and Fe3 O4 for nitrate reduction. The application of this electrode is beneficial to nitrate purification in water. Interconversion of Fe (II) and Fe (III) facilitates electron transfer. The presence of Cl and Br could regulate the form of nitrogen in the solution.