化学
降级(电信)
催化作用
X射线光电子能谱
可重用性
阿特拉津
核化学
三元数制
猝灭(荧光)
三元运算
激进的
三元络合物
高效液相色谱法
色谱法
化学工程
荧光
有机化学
相(物质)
杀虫剂
农学
计算机科学
软件
程序设计语言
酶
量子力学
工程类
物理
生物
电信
作者
Yichen Hong,Jiali Peng,Xiuge Zhao,Yan Yan,Bo Lai,Gang Yao
标识
DOI:10.1016/j.cej.2019.03.127
摘要
Ternary CoMgAl-LDOs were synthesized by co-precipitation and employed in the activation of peroxymonosulfate (PMS) for atrazine (ATZ) removal. A series of catalysts with different Co: Mg: Al ratios were obtained and characterized by XRD, SEM, EDS and XPS. Several key parameters such as Co: Mg: Al ratios, catalyst dosage, PMS dosage, initial pH and initial ATZ concentration were optimized. The results show that Co1Mg2Al1-LDO/PMS system exhibited better degradation performance and the maximum ATZ removal (98.7%) and TOC removal (26.5%) were obtained under the optimal conditions (Co1Mg2Al1-LDO = 75 mg/L, PMS = 0.4 mM and ATZ concentration = 10 mg/L at initial pH = 6.3). To verify the excellent performance in the Co1Mg2Al1-LDO/PMS system, three control experiments (i.e., PMS alone system, Co1Mg2Al1-LDO alone system and Mg3Al1-LDO/PMS system) and reusability tests were carried out. Furthermore, a total of eight intermediates were detected by UPLC-QTOF-MS/MS and the degradation pathways of ATZ were proposed. Besides, quenching experiments demonstrated that SO4− acted as the dominant active radicals and the amount of SO4− was quantified indirectly by HPLC. Finally, a reasonable reaction mechanism of Co1Mg2Al1-LDO/PMS system for ATZ removal was put forward according to the comprehensive analysis.
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