Ding Chunsheng, Lei Jia, Cai Zhiyue, Gao Mengying, Zou Zhaozheng, Li Yuanfeng, Deng Jing
College of Civil Engineering, Zhejiang University of Technology, Hangzhou, 310023, China.
Environ Sci Pollut Res Int. 2023 Apr;30(18):53355-53369. doi: 10.1007/s11356-023-25914-9. Epub 2023 Mar 1.
In this research, FeCoO nanomaterial was successfully synthesized by a typical sol-gel method and conducted as an effective agent for peroxymonosulfate (PMS) activation to eliminate antibiotics flurbiprofen (FLU), a strong nonsteroidal drug. FeCoO nanomaterial was characterized by XRD, TEM, SEM, and XPS. Various characterization results proved that FeCoO held stable spinel structure. The interfering factors including initial pH, PMS concentration, catalyst dosage, inorganic anions, and humic acid on FLU removal were also discussed. The conclusion was that the removal efficiency of FLU reached 98.2% within 120 min after adding FeCoO (0.4 g L) and PMS (3 mM). The optimal pH for FLU degradation was the initial pH of 6.5; too acidic or alkaline was not conductive to the degradation. The existence of HA and Cl restrained the degradation of FLU, and HCO promoted the removal, while the influence of NO and SO could not be considered. The radical scavenging experiment confirmed that OH, O, and SO participated in FLU removal and SO functioned a leading role. FeCoO showed high efficiency for PMS activation in pH range of 3.0 to 10.0. After the fourth cycle operation, the FLU removal rate exceeded 76.9%, and the Co leaching rate was low during the catalytic reaction. This study shows that FeCoO nanomaterial is an efficient and environment-friendly catalyst, which can be applied for PMS activation to remove organic pollutants in water.
在本研究中，通过典型的溶胶 - 凝胶法成功合成了FeCoO纳米材料，并将其作为一种有效的过一硫酸盐（PMS）活化剂，用于去除强效非甾体类药物氟比洛芬（FLU）。采用X射线衍射（XRD）、透射电子显微镜（TEM）、扫描电子显微镜（SEM）和X射线光电子能谱（XPS）对FeCoO纳米材料进行了表征。各种表征结果证明FeCoO具有稳定的尖晶石结构。还讨论了包括初始pH值、PMS浓度、催化剂用量、无机阴离子和腐殖酸等对氟比洛芬去除的干扰因素。结论是，加入FeCoO（0.4 g/L）和PMS（3 mM）后，120分钟内氟比洛芬的去除效率达到98.2%。氟比洛芬降解的最佳pH值为初始pH值6.5；过酸或过碱均不利于降解。腐殖酸（HA）和氯离子（Cl）的存在抑制了氟比洛芬的降解，而碳酸氢根离子（HCO）促进了其去除，硝酸根离子（NO）和硫酸根离子（SO）的影响可忽略不计。自由基清除实验证实，羟基自由基（OH）、超氧阴离子自由基（O）和硫酸根自由基（SO）参与了氟比洛芬的去除，且硫酸根自由基起主导作用。FeCoO在3.0至10.0的pH范围内对PMS活化具有高效性。经过四次循环操作后，氟比洛芬的去除率超过76.9%，催化反应过程中钴的浸出率较低。本研究表明，FeCoO纳米材料是一种高效且环境友好的催化剂，可用于PMS活化以去除水中的有机污染物。
