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PDF(647 KB)
PDF(647 KB)
共价三嗪骨架活化过一硫酸盐降解磺胺甲恶唑
Covalent triazine-based framework activates peroxymonosulfate to degrade sulfamethoxazole
通过微波合成技术制备磁性共价三嗪骨架材料（MCTF）.利用SEM、TEM和FTIR对其形貌特征和表面基团进行表征分析；测定分析其微观介孔结构与饱和磁化强度；并将合成的MCTF用于活化过一硫酸盐（PMS）降解磺胺甲恶唑（SMX）.研究了MCTF/PMS体系降解SMX的主要影响因素，包括MCTF投加量、PMS浓度、pH值、无机离子.研究表明：在MCTF投加量0.3g/L，PMS浓度1.50mmol/L，SMX初始浓度0.05mmol/L的室温条件下，30min内SMX的降解率可达100%.随pH值升高，SMX的降解率随之降低.SO42-与HCO3-对SMX的降解具有抑制作用，Cl-则具有双重作用.循环试验证明MCTF具有良好的重复利用性能.MCTF/PMS体系中降解SMX的活性物质为硫酸根自由基（SO4-·）和羟基自由基（·OH），并主要在催化剂表面生成反应；通过UHPLC-MS/MS对SMX的降解途径与产物进行推测分析.
Magnetic covalent triazine-based frameworks (MCTF) were prepared by microwave-assisted synthesis. The morphology and surface groups of MCTF were characterized and analyzed by SEM, TEM and FTIR. The microscopic mesoporous structure and saturation magnetization were measured, which was used to the degradation of sulfamethoxazole (SMX) by activating peroxymonosulfate (PMS). The main significant factors of degradation of SMX in MCTF/PMS system were studied, including dosage of MCTF, PMS concentration, pH, inorganic ions. The results showed that the 100% degradation occurred for 0.05mmol/L SMX after 30min treatment by 0.3g/L MCTF and 1.50mmol/L PMS. The degradation rate of SMX decreased with the increase of pH. SO42- and HCO3- had inhibitory effects on SMX degradation, while Cl- had dual effects on SMX degradation. Cyclic test proved that MCTF had good recycling performance. In the reaction process, the active substances degrading SMX were mainly generated reaction on the catalyst surface by sulfate radical (SO4-·) and hydroxyl radical (·OH). The pathways and potential products of SMX was analyzed by UHPLC-MS/MS.
磁性共价三嗪骨架材料 / 过一硫酸盐 / 磺胺甲恶唑 / 降解 / 微波合成法
degradation / magnetic covalent triazine-based framework / microwave synthesis / peroxymonosulfate / sulfamethoxazole
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江苏省高校自然科学研究重大项目（15KJA610003）；江苏省自然科学基金青年项目（BK20160359）
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