钴氮共掺杂生物炭活化过硫酸盐降解环丙沙星

Cobalt and nitrogen co-doped biochar activated persulfate for ciprofloxacin degradation

以松木屑为生物质,采用浸渍法和高温煅烧法制备了钴氮共掺杂生物炭(Co/N-BC)。采用扫描电子显微镜(SEM)、X射线衍射仪(XRD)、拉曼光谱仪(Raman)、傅里叶变换红外光谱仪(FTIR)和全自动比表面与孔隙度分析仪对材料的形貌、组成、结构等进行了分析。以Co/N-BC为催化剂活化过一硫酸盐(PMS)用于水中环丙沙星(CIP)的降解。结果表明,制备的Co/N-BC在活化PMS降解CIP方面表现出优异的性能,60 min内对CIP的去除率高达98.3%,循环使用5次后去除率仍为33.6%。自由基淬灭实验分析表明,硫酸根自由基(SO_(4)^(–))对CIP的降解起主要作用,Co/N-BC材料在活化过硫酸盐治理污染废水领域具有广阔的应用前景。

Cobalt and nitrogen co-doped biochar(Co/N-BC)was prepared from pine sawdust by impregnation and high-temperature calcination.Scanning electron microscopy(SEM),X-ray diffractometer(XRD),Raman spectrometer(Raman),Fourier transform infrared spectrometer(FTIR)and automatic specific surface and porosity analyzer were used to analyze the morphology,composition and structure of the material.Co/N-BC catalyst was used to activate peroxymonosulfate(PMS)for the degradation of ciprofloxacin(CIP)in water.The results showed that the prepared Co/N-BC exhibited excellent performance in activating PMS to degrade CIP.The degradation efficiency of CIP reached 98.3%within 60 min,and remained 33.6%after 5 cycles.The free radical quenching experiments suggested that sulfate radical(SO_(4)^(–))played an important role in CIP degradation.The Co/N-BC material prepared in this study has broad application prospects in activating persulfate for the treatment of polluted wastewater.