作者：

Liang, Xuetao ; Zhou, Wenjin ; Li, Jingran ; Liu, Bingyang ; Cui, Longyan ; Rong, Lingyun ; Yang, Qi ; Yang, Zhilin

单位：

China Univ Geosci Beijing, MOE Key Lab Groundwater Circulat & Environm Evolut, Beijing 100083, Peoples R China;Chinese Res Inst Environm Sci, Beijing 100012, Peoples R China

摘要：

Antibiotic contamination in water presents a substantial threat to both the ecosystem and public health, whereas the electro-Fenton (EF) process is acknowledged as an effective method for removing refractory organics from wastewater. Based on this, we propose a multiphase EF process that utilizes coral-like Cu-Co bimetallic hydroxide (CuCoOOH) and oxide (CuCo2O4) modified nickel foam (NF) electrodes as cathodic materials, thereby facilitating simultaneous oxygen diffusion and the in-situ generation and activation of H2O2. It has been demonstrated that the EF process with CuCo2O4-modified cathodes effectively degraded tetracycline (TC) under low energy consumption conditions ([Na2SO4]0 = 10.0 mM, [Current density]0 = 5.0 mA/cm2), achieving a removal efficiency of 96.7 %. However, the removal efficiency of the CuCoOOH-modified cathode EF process for TC (10 mg/ L) was only 78.2 %. Furthermore, the CuCo2O4/NF/EF system demonstrates superior environmental tolerance and electrode repeatability. Electron paramagnetic resonance and quenching experiments demonstrated that & sdot;OH, & sdot;O2-, and 1O2 participated in the oxidation process in both EF processes, with 1O2 identified as the primary contributor to the oxidation of TC. In-situ Raman spectroscopy and density functional theory reveal the relationship between the Cu-Co bimetallic configuration and the in-situ generation trends and formation free energy of H2O2. Differences in the degradation intermediates, pathways, and toxicity evolution of TC in two EF processes were identified using LC-MS. It is ultimately emphasized that the CuCo2O4-modified NF cathode EF process is more cost-effective and detoxifying, while the cathode exhibits dual Fenton-like activity, ensuring sustained and efficient wastewater treatment.

基金：

Major Project of China [2015ZX07406005]

语种：

英文

DOI：

10.1016/j.seppur.2025.133050

来源：

SEPARATION AND PURIFICATION TECHNOLOGY,2025():.

出版日期：

2025-09-17

提交日期：

2025-05-16

引用参考：

Liang, Xuetao; Zhou, Wenjin; Li, Jingran; Liu, Bingyang; Cui, Longyan; Rong, Lingyun; Yang, Qi; Yang, Zhilin. Electro-Fenton degradation of emerging contaminants using Cu-Co bimetallic-modified nickel foam cathodes: The role of metal surface structure and singlet oxygen[J]. SEPARATION AND PURIFICATION TECHNOLOGY,2025():.