Application of energy sustainable utilization strategy for highly efficient electro-Fenton treatment of antibiotics
Application of energy sustainable utilization strategy for highly efficient electro-Fenton treatment of antibiotics
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DOI：
10.1016/j.jece.2021.107059
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发表时间：
2021-12
影响因子：
7.7
通讯作者：
Luyi Xing;Jia Wei;Xiaohui Liu;Yifei Zhang;Mengdie Xu;Jiamei Li;Guoping Pan;Jun Li
中科院分区：
文献类型：
--
作者：
Luyi Xing;Jia Wei;Xiaohui Liu;Yifei Zhang;Mengdie Xu;Jiamei Li;Guoping Pan;Jun Li
采用水热-热解相结合的方法制备了新型掺氮污泥生物炭（NSBC）电芬顿阴极，并将其应用于磺胺甲恶唑（SMX）的降解。最佳阴极（NSBC*@Ni-F）的表面特征显示出在酸性条件下具有大量的氧还原反应（ORR）电催化活性中心，具有较高的电子转移效率。两个氮物种（吡啶-N和石墨-N）占主导地位的ORR电催化活性中心。采用NSBC*@Ni-F作为阴极的EF系统中H2 O2产量（195.99 mg L-1）和相应的电流效率（73.69 ± 1.2%）是裸污泥生物炭作为阴极的7倍。SMX的去除率也达到了95.72%。TOC去除率达到85.11%，相应的能耗低至12.03 kW h kg−1。提出了EF过程中合理的反应中间体，预测和探索了SMX在水体修复中的降解途径。本研究为开发具有良好活性和重复使用稳定性的环保型、经济型阴极材料开辟了一条新的道路。
An innovative nitrogen-doped sludge-derived biochar (NSBC) electro-Fenton cathode was fabricated by a hydrothermal and pyrolysis combination method, which was applied to the degradation of sulfamethoxazole (SMX). The superficial characteristics of the optimal cathode (NSBC*@Ni-F) showed a large number of oxygen reduction reaction (ORR) electrocatalytic active sites under acidic conditions with high electrons transfer efficiency. The two nitrogen species (pyridinic-N and graphite-N) dominated the ORR electrocatalytic active sites. The H2O2yield (195.99 mg L−1) and corresponding current efficiency (73.69 ± 1.2%) using NSBC*@Ni-F cathode were 7 times higher than that of bare sludge biochar as cathode in EF system. An excellent SMX removal efficiency (95.72%) was achieved as well. The TOC removal achieved 85.11% and corresponding energy consumption reached as low as 12.03 kW h kg−1. Rational reaction intermediates were put forward during EF procedure to predict and explore the SMX degradation pathway for water remediation. This study is hopeful to hew out a new road to develop eco-friendliness and cost-effective cathode material in EF system with adequate activity and reuse stabilization.