Facile synthesis of superparamagnetic β-CD-MnFe2O4 as a peroxymonosulfate activator for efficient removal of 2,4- dichlorophenol: structure, performance, and mechanism.,Journal of Hazardous Materials

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Facile synthesis of superparamagnetic β-CD-MnFe2O4 as a peroxymonosulfate activator for efficient removal of 2,4- dichlorophenol: structure, performance, and mechanism.
Journal of Hazardous Materials ( IF 12.2 ) Pub Date : 2020-03-12 , DOI: 10.1016/j.jhazmat.2020.122528
Xiaojun Zhou ₁ , Lingshuai Kong ₁ , Zongyu Jing ₁ , Shuqing Wang ₁ , Yongchao Lai ₂ , Meng Xie ₃ , Long Ma ₄ , Zhenyu Feng ₁ , Jinhua Zhan ₁

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In this study, superparamagnetic β-CD-MnFe2O4 with a large surface area was synthesized via a facile co-precipitation method, with β-cyclodextrin (β-CD) acting as a coating agent. The as-prepared β-CD-MnFe2O4 exhibited better catalytic performance than bare MnFe2O4 in terms of activating peroxymonosulfate (PMS) to degrade 2,4-dichlorophenol (2,4-DCP) over a broad pH range of 5-11. Electron spin resonance spectroscopy (ESR) and free radical quenching experiments indicate that various active species (SO4-/OH/O2-/1O2) are generated in the β-CD-MnFe2O4/PMS system and that pollutants trapped in the cyclodextrin cavity are quickly degraded. Various reaction parameters of the β-CD-MnFe2O4/PMS system and the stability of β-CD-MnFe2O4 were also investigated. The results indicate that β-CD-MnFe2O4 is promising for use in water purification owing to its excellent magnetic separation and recovery properties and good resistance to humic acid (HA).

中文翻译：

简便合成超顺磁性β-CD-MnFe2O4作为过氧单硫酸盐活化剂，用于有效去除2,4-二氯苯酚：结构，性能和机理。

在这项研究中，通过简便的共沉淀法，以β-环糊精（β-CD）为包覆剂，合成了大表面积超顺磁性β-CD-MnFe2O4。所制备的β-CD-MnFe2O4在活化过氧一硫酸盐（PMS）在5-11的宽pH范围内降解2,4-二氯苯酚（2,4-DCP）方面表现出比裸MnFe2O4更好的催化性能。电子自旋共振光谱法（ESR）和自由基猝灭实验表明，β-CD-MnFe2O4/ PMS系统中产生了各种活性物质（SO4- / OH / O2- / 1O2），并且环糊精腔中捕获的污染物很快降级。还研究了β-CD-MnFe2O4/ PMS系统的各种反应参数和β-CD-MnFe2O4的稳定性。

更新日期：2020-03-12

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