三峡大学学报（自然科学版）2024，Vol.46Issue(3)：105-112,8.DOI:10.13393/j.cnki.issn.1672-948X.2024.03.016
天然磁铁矿光催化转化水中头孢菌素类抗生素研究:共存离子的影响
Studies on the Photocatalytic Conversion of Cephalosporin Antibiotics in Aqueous Environment by Natural Magnetite:Effect of Coexisting Ions
摘要
Abstract
Cephalosporin antibiotics(CEPs)are prevalent in environmental waters,but the effects of relatively high content of inorganic ions on the photocatalytic conversion of CEPs in the aqueous environment by natural magnetite have not been comprehensively studied.In this study,the visible light(λ≥420 nm)/natural magnetite system was found to have a certain capacity of CEPs removal from water,and the active species were determined to be hole,electron and hydroxyl radical.Using cefoperazone sodium(CFP)as the representative CEPs,the effects of various inorganic ions on the catalytic degradation of CFP in water by visible light/natural magnetite system were mainly investigated.It was shown that coexisting SO2-4,NO-3,HCO-3,Cl-,Br-,and I-affected the degradation by changing the reactive species in the system,while SO2-4,NO-3,Br-and high concentration of I-all promoted the degradation well.However,HCO-3 in the early stage of reaction,Cl-and low concentration of I-inhibited the degradation.In addition,high concentration of HCO-3 in the later stage of reaction can cause alkali hydrolysis of CFP and thus exhibited promotion.The presence of F-,Ca2+,and Mn2+ affected CFP degradation by altering magnetite activity,in which Ca2+,Mn2+,and low concentration of F-were detrimental but high concentration of F-was beneficial to CFP degradation;Coexisting Mg2+,Zn2+,and Cu2+ enhanced degradation by interacting with CFP.Moreover,the degradation intermediates in the presence of various inorganic ions were same,and the main degradation products and degradation pathways of CFP in the visible light/natural magnetite system were analyzed.关键词
天然磁铁矿/头孢菌素类抗生素/可见光催化/无机离子Key words
natural magnetite/ephalosporins/visible-light photocatalysis/inorganic ions分类
资源环境引用本文复制引用
吴义婷,肖雪,米慧荣,秦慧芳,黄应平,李瑞萍..天然磁铁矿光催化转化水中头孢菌素类抗生素研究:共存离子的影响[J].三峡大学学报（自然科学版）,2024,46(3):105-112,8.基金项目
国家自然科学基金项目(22176110) （22176110）
三峡库区生态环境教育部工程中心开放基金(KF2022-04) （KF2022-04）
