煤炭转化2025，Vol.48Issue(6)：135-146,12.DOI:10.19726/j.cnki.ebcc.202506012
固废衍生Mg2P2O7/N-C生物质炭及其活化过一硫酸盐降解四环素的性能
Solid waste derived Mg2P2O7/N-C biomass carbon and its activation of persulfate to degrade tetracycline
摘要
Abstract
The functional carbon material prepared from solid waste can be used to degrade tetracycline in wastewater by activating peroxymonosulfate(PMS).The French plane tree fallen leaves and struvite were employed as raw materials to synthesize Mg2P2O7/Biochar(MBC)composite via high-temperature co-calcination.The effects of mass ratios of leaves to struvite(1:0.25,1:0.5,1:1,1:1.5,and 1:2)and calcination temperatures(500℃,600℃,700℃,800℃,900℃,and 1 000℃)on the structure and performance of MBC composites were studied.The MBC/3 sample prepared at a 1:1 raw material mass ratio and 900℃calcination temperature shows optimal tetracy-cline removal performance.SEM and TEM results show that MBC/3 exhibits a composite structure where 10 nm-20 nm Mg2P2O7 particles are loaded onto flake-like biochar surfaces,with an intimate interfacial structure favoring inter-component electron transport.Compared with unmodified biochar,XPS results indicate that the nitrogen content of MBC/3 increases by 2.1 times,while BET analysis shows that MBC/3 has a more developed pore structure and larger specific surface area,providing more active sites.The results of tetracycline removal experiments demonstrate that the MBC/3+PMS system achieves over 80％removal within 5 min,which is 262％higher than that of biochar+PMS system.Structure-performance analysis reveals that the superior properties of MBC/3 originates from the synergistic effects between Mg2P2O7 and biochar,coupled with high nitrogen doping.EPR tests identify four active radicals(·OH,SO4-·,O2-·,and 1O2)in the reaction system,and the radical quenching experiments confirm that O2-·is the predominant reactive species.Furthermore,the MBC/3+PMS system demonstrates robust environmental adaptability,maintaining stable tetracycline degrada-tion performance in the presence of various inorganic anions and a broad pH range(3-11).In recy-cling stability tests,the catalyst exhibits regenerable capability,with MBC/3 maintaining over 80％tetracycline removal within 30 min after two annealing treatments.关键词
生物质炭/活化过一硫酸盐/四环素/非均相反应/复合材料Key words
biochar/activate PMS/tetracycline/heterogeneous catalysis/composite material引用本文复制引用
余加源,刘瑞莹,李晓..固废衍生Mg2P2O7/N-C生物质炭及其活化过一硫酸盐降解四环素的性能[J].煤炭转化,2025,48(6):135-146,12.基金项目
国家自然科学基金项目(52202092)、山东省自然科学基金项目(ZR2022QE076)和山东省高等学校"青创团队计划"项目(2023KJ104). （52202092）
