摘要
四环素因其应用广泛、难以自然降解性以及潜在的生态风险,成为水环境污染物中的重点关注对象。开发低成本、高效的光催化剂活化过硫酸氢钾(PMS)降解有机污染物被认为是治理环境污染的重要途径。本研究采用简单的煅烧法制备了Mn、S共掺杂g-C_(3)N_(4)催化剂,用于协同光活化PMS降解四环素。采用X射线衍射仪(XRD)对其进行表征,设计单因素试验探究Mn、S共掺杂g-C_(3)N_(4)降解四环素效果和最佳条件。单因素试验结果表明,最佳Mn、S共掺杂g-C_(3)N_(4)投加量为0.2 g/L,过硫酸氢钾浓度为5 mmol/L,四环素溶液初始pH为3,初始浓度为10 mg/L(100 mL)时去除效果最好,四环素去除率为90.4%。这项研究为使用g-C_(3)N_(4)基光催化剂降解抗生素提供了一种新的策略。
Tetracycline had become a focus of attention among water environmental pollutants due to its wide application,difficulty in natural degradation and potential ecological risks.The development of low-cost and efficient photocatalysts to activate potassium persulfate to degrade organic pollutants was considered to be an important way to control environmental pollution.In this study,Mn and S co-doped g-C_(3)N_(4)catalysts were prepared by a simple calcination method for the synergistic photoactivated PMS degradation of tetracycline.It was characterized by X-ray diffractometer(XRD),and a single factor experiment was designed to explore the effect and optimal conditions of tetracycline degradation by Mn and S co-doped g-C_(3)N_(4).The results of the single factor experiment showed that the optimal Mn and S co-doped g-C_(3)N_(4)dosage was 0.2 g/L,the potassium persulfate concentration was 5 mmol/L,the initial pH of the tetracycline solution was 3,and the initial concentration was 10 mg/L(100 mL).The removal effect was the best,and the tetracycline removal rate was 90.4%.A new strategy was provided for the degradation of antibiotics using g-C_(3)N_(4)-based photocatalysts.
作者
黄继明
刘润清
皮军
龙泽荣
何炳林
李方庆
李莲
王清宇
HUANG Ji-ming;LIU Run-qing;PI Jun;LONG Ze-rong;HE Bing-lin;LI Fang-qing;LI Lian;WANG Qing-yu(School of Material and Chemical Engineering,Tongren University,Guizhou Tongren 554300,China)
出处
《广州化工》
CAS
2024年第6期120-123,138,共5页
GuangZhou Chemical Industry
基金
铜仁学院博士启动基金(trxyDH2202)
大学生创新创业训练项目(202210665077)。
关键词
Mn、S掺杂
石墨相氮化碳
过硫酸盐
四环素
光催化
降解
Mn,S doping
graphite carbon nitride
persulfate
tetracycline
photocatalysis
degradation
