共价三嗪骨架活化过一硫酸盐降解磺胺甲恶唑

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Abstract

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. SO₄^2- 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.

Key words： microwave synthesis magnetic covalent triazine-based framework peroxymonosulfate sulfamethoxazole degradation

Received: 25 June 2019

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X703

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	Articles by authors
	SHAO Zi-chun
	LU Jian
	GAO Shi-qian
	XU Jie
	ZHANG Zhan-en

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SHAO Zi-chun,LU Jian,GAO Shi-qian等. Covalent triazine-based framework activates peroxymonosulfate to degrade sulfamethoxazole[J]. CHINA ENVIRONMENTAL SCIENCECE, 2020, 40(1): 135-142.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2020/V40/I1/135

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