电化学辅助煤基炭膜活化过硫酸氢盐去除水体中的磺胺甲恶唑
Sulfamethoxazole removal from water by electro-activation of peroxymonosulfate using coal-based carbon membrane
潘宗林 1徐静 1马焕然 1李怀北 1范新飞 1宋成文 1王同华2
作者信息
- 1. 大连海事大学环境科学与工程学院,大连 116026
- 2. 大连海事大学环境科学与工程学院,大连 116026;大连理工大学化工学院,精细化工国家重点实验室,炭膜及多孔炭材料课题组,大连 116024
- 折叠
摘要
本工作构建了电化学辅助煤基炭膜活化过硫酸氢盐(E-CM-PMS)体系,用于水体中磺胺甲噁唑(SMX)的去除.表征了煤基炭膜的形貌与结构,系统考察了运行条件对SMX去除效率的影响,探究了SMX降解机理以及该体系在不同水质背景下去除SMX的适用性.研究表明,在外加1.5 V电压下,煤基炭膜对PMS的活化效率显著增强,从而提升了系统对SMX的去除效率.在PMS添加量为0.2 g/L,流速为0.4 mL/min,pH为6.52时,该系统对SMX的去除率高达97％,并且在不同水质背景下均表现出较优的去除性能.机理分析表明SMX的高效去除归功于非自由基(电子转移和1O2)和自由基(·OH、SO4·-)机理的共同作用.
Abstract
An electrochemical enhanced coal-based carbon membrane(CM)peroxymonosulfate activation(E-CM-PMS)system was constructed for the removal of sulfamethoxazole(SMX)from water.The morphology and structure of CM were characterized.The effects of operating conditions on the removal efficiency of SMX were systematically investigated.The SMX degradation mechanism and the applicability of E-CM-PMS for SMX removal from different water matrixes were also investigated.Results show that the PMS activation efficiency of CM is significantly enhanced under the applied voltage of 1.5 V,thus improving its SMX removal efficiency.When the PMS dosage is 0.2 g/L,the flow rate is 0.4 mL/min,and the pH value is 6.52,the SMX removal rate of the system is up to 97％,and it also exhibits good applicability for SMX removal in different water matrixes.The mechanism analysis reveals that the efficient degradation of SMX during the treatment is owing to the synergistic effect of non-free radical(direct electron transfer and 1O2)and free radical(·OH,SO4·-)mechanism.
关键词
煤基炭膜/电化学活化/过硫酸氢盐/磺胺甲噁唑Key words
coal-based carbon membrane/electro-activation/peroxymonosulfate/sulfamethoxazole引用本文复制引用
基金项目
大连市科技创新基金(2021JJ12SN43)
中央高校基本科研业务费(3132023163)
中央高校基本科研业务费(3132023504)
出版年
2024
NETL
NSTL
万方数据