Hunan International Scientific and Technological Cooperation Base of Agricultural Typical Pollution Remediation and Wetland Protection, College of Resources and Environment, Hunan Agricultural University, Changsha, 410128, China.
Hunan International Scientific and Technological Cooperation Base of Agricultural Typical Pollution Remediation and Wetland Protection, College of Resources and Environment, Hunan Agricultural University, Changsha, 410128, China.
Environ Res. 2021 Jun;197:111144. doi: 10.1016/j.envres.2021.111144. Epub 2021 Apr 16.
The disadvantages of limited working pH range and poor stability have hindered the practical application of traditional electro-Fenton process. In this research, a novel heterogeneous electro-Fenton (HEF) process with FeFe layered double hydroxide/carbon felt (FeFe LDH/CF) as cathode was developed for the rapid destruction of ciprofloxacin (CIP) in bulk solution. Effects of crucial influencing factors (initial pH, current intensity) on CIP degradation were investigated. Results indicated that FeFe LDH/CF cathode was efficient for CIP degradation (88.11%). Furthermore, CIP degradation performance in HEF could remain stable over wide range of pH (pH 3-9). The catalytic degradation of CIP in HEF process might be a combined effect of homogeneous EF reaction, anodic oxidation, and surface catalysis process via≡Fe/≡Fe cycle. Possible degradation pathways were proposed. The results suggested that FeFe LDH/CF cathode showed great application potential for CIP degradation.
传统电芬顿工艺的工作 pH 范围有限、稳定性差等缺点限制了其实用化进程。本研究开发了一种以 FeFe 层状双氢氧化物/碳纤维毡（FeFe LDH/CF）为阴极的新型非均相电芬顿（HEF）工艺，用于快速破坏水体中环丙沙星（CIP）。考察了初始 pH 值、电流强度等关键影响因素对 CIP 降解的影响。结果表明，FeFe LDH/CF 阴极对 CIP 降解具有高效性（88.11%）。此外，HEF 中 CIP 的降解性能在较宽的 pH 值范围内（pH 3-9）保持稳定。HEF 过程中 CIP 的催化降解可能是均相 EF 反应、阳极氧化和通过≡Fe/≡Fe 循环的表面催化过程的综合效应。提出了可能的降解途径。结果表明，FeFe LDH/CF 阴极在 CIP 降解方面具有很大的应用潜力。
