D201树脂负载水合氧化铁催化臭氧氧化磺胺甲恶唑  

Catalytic ozonation of sulfamethoxazole using HFO/D201

作　　者：孟冠华 丁素云[1] 刘宝河 张林森 陈娇玉 MENG Guanhua;DING Suyun;LIU Baohe;ZHANG Linsen;CHEN Jiaoyu(School of Energy and Environment, Anhui University of Technology,Ma'anshan 243000, China;Ministry of Education Biofilm Process Water Purification and Utilization Technology EngineeringResearch Center, Ma'anshan 243000, China)

机构地区：[1]安徽工业大学能源与环境学院,安徽马鞍山243002 [2]教育部生物膜法水质净化及利用技术工程研究中心,安徽马鞍山243002

出　　处：《功能材料》2022年第2期2026-2032,共7页Journal of Functional Materials

基　　金：安徽高校自然科学研究重点项目(KJ2017A065);2017年度高校优秀骨干青年人才国内外访学研修项目(gxfx2017019)。

摘　　要：采用离子交换-原位沉淀法,以D201阴离子交换树脂负载水合氧化铁(HFO)制备催化剂HFO/D201,在动态实验条下对磺胺甲恶唑(SMX)进行催化臭氧氧化降解实验。分别考察了溶液初始浓度、pH、流速、催化剂及臭氧投加量对SMX去除率的影响,并探讨反应机理。结果表明,增大臭氧和催化剂的投加量、减小流速和溶液初始浓度均可提升SMX的去除率,当pH接近HFO/D201的零电荷点时,催化效果最佳。在臭氧剂量为1.85 mg/L,HFO/D201投加量为0.8 g/L,SMX初始浓度为10 mg/L,流速为4 mL/min,不调节溶液pH(pH值=5.25)的条件下,SMX的去除率可达92.67%,比臭氧氧化体系提高了57.75%。通过自由基抑制剂投加实验间接推断出,在HFO/D201催化臭氧氧化SMX的反应过程中,同时存在·O^(-)_(2)氧化及臭氧分子直接氧化。The ion exchange-in-situ precipitation method is used to load hydrated iron oxide(HFO)on D201 anion exchange resin to prepare catalyst HFO/D201,and catalytic ozone oxidation degradation experiments on SMX are performed under dynamic test strips.The effects of initial solution concentration,pH,flow rate,catalyst and ozone dosage on the removal rate of SMX are investigated,and the reaction mechanism is discussed.The results show that both increasing the dosage of ozone and catalyst,and reducing the flow rate and concentration of SMX can increase its removal rate.When the pH is close to the zero point charge of HFO/D201,the catalytic effect is the best.Under the condition that the ozone dose is 1.85 mg/L,HFO/D201 dosage is 0.8 g/L,the concentration of SMX is 10 mg/L,the flow rate is 4 mL/min,and pH is 5.25,the removal rate of SMX is 92.67%,57.75%higher than ozonation system.Through the addition experiment of tert-butanol and p-benzoquinone,it is inferred indirectly that in the process of HFO/D201 catalyzed ozonation SMX,there are both·O^(-)_(2) oxidation and direct oxidation of ozone.Phosphate addition experiment confirms that the degradation reaction mainly occurred on the surface of HFO/D201.

关 键 词：催化臭氧氧化 磺胺甲恶唑 超氧离子自由基 水合氧化铁 

分 类 号：X703[环境科学与工程—环境工程]