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 Pollut. 2021 Oct 1;286:117310. doi: 10.1016/j.envpol.2021.117310. Epub 2021 May 15.
A graphite felt (GF) cathode was firstly modified by Fe-Mn binary oxide (FMBO), active carbon (AC), carbon black (CB), and polytetrafluoroethylene (PTFE), which exhibits satisfactory ciprofloxacin (CIP) removal efficiency at neutral pH value in electro-Fenton (EF) system. Morphological data showed that modified cathodes have larger surface area and volume pore as well as more active sites. And electrochemical properties have proved stronger current response after modification. In compassion to the unmodified GF, the FMBO/AC/CB modified GF (FMBO-GF) has wider pH range and higher CIP removal efficiency due to its unique nanoparticles structure. The CIP removal efficiency achieved 95.40% in 30 min, and the removal efficiency of total organic carbon (TOC) achieved 93.77% in 2 h when conditions were optimal (25 mg/L initial CIP concentration, 2 mA/cm current density, FMBO/AC: CB: PTFE of 1:1:5, and 7 initial pH value) in this study. The results of great degradation and mineralization of CIP in this study indicate that the FMBO-GF cathode has huge potential on antibiotics removals in neutral environment.
一种石墨毡（GF）阴极首先通过 Fe-Mn 二元氧化物（FMBO）、活性炭（AC）、炭黑（CB）和聚四氟乙烯（PTFE）进行了修饰，在电芬顿（EF）系统中在中性 pH 值下表现出令人满意的环丙沙星（CIP）去除效率。形态数据表明，修饰后的阴极具有更大的表面积和体积孔以及更多的活性位点。电化学性能证明修饰后电流响应更强。与未修饰的 GF 相比，由于其独特的纳米颗粒结构，FMBO/AC/CB 修饰的 GF（FMBO-GF）具有更宽的 pH 范围和更高的 CIP 去除效率。在本研究的最佳条件下（初始 CIP 浓度为 25mg/L，电流密度为 2mA/cm，FMBO/AC:CB:PTFE 为 1:1:5，初始 pH 值为 7），30min 内 CIP 的去除效率达到 95.40%，2h 内总有机碳（TOC）的去除效率达到 93.77%。本研究中 CIP 的高效降解和矿化结果表明，FMBO-GF 阴极在中性环境下对抗生素的去除具有巨大的潜力。
