Fluffy ball-like magnetic covalent organic frameworks for adsorption and removal of organothiophosphate pesticides
文献类型： 外文期刊
作者： Qi, Peipei 1 ; Wang, Jiao 1 ; Li, Hongping 5 ; Wu, Yangli 3 ; Liu, Zhenzhen 1 ; Zheng, Bing 3 ; Wang, Xinquan 1 ;
作者机构： 1.Zhejiang Acad Agr Sci, State Key Lab Managing Biot & Chem Threats Qual &, Hangzhou 310021, Peoples R China
2.Zhejiang Acad Agr Sci, Inst Agroprod Safety & Nutr, Hangzhou 310021, Peoples R China
3.Nanjing Tech Univ, Key Lab Flexible Elect, 30 South Puzhu Rd, Nanjing 211816, Peoples R China
4.Nanjing Tech Univ, Inst Adv Mat, 30 South Puzhu Rd, Nanjing 211816, Peoples R China
5.Jiangsu Univ, Inst Energy Res, 301 Xuefu Rd, Zhenjiang 212013, Peoples R China
6.30 South Puzhu Rd, Nanjing 211816, Peoples R China
7.198 Shiqiao Rd, Hangzhou 310021, Peoples R China
关键词： Magnetic covalent organic framework; Organothiophosphate pesticide adsorption; Adsorption mechanism
期刊名称：SCIENCE OF THE TOTAL ENVIRONMENT （ 影响因子：10.753； 五年影响因子：10.237 ）
ISSN： 0048-9697
年卷期： 2022 年 840 卷
页码：
收录情况： SCI
摘要： Organothiophosphate pesticides (OPPs) are the most commonly used pesticides, and their environmental migration brings serious water pollution and significant danger to human health, and thus it is urgent to develop effective technologies for removal of OPPs from water. Herein, magnetic covalent organic framework (COF) with a triazine skeleton was fabricated for enhanced adsorption and removal of OPPs from water. Magnetic COF has a fluffy ball-like structure, high crystallinity, large BET surface area (1543 m(2) g(-1)), and regular mesopores (~3.1 nm). Therefore, it displayed high adsorption rates and large adsorption capacities for four typical OPPs, pyridafenthion, phoxim, pyrimitate, and phorate. Based on adsorption kinetic and isotherms investigations, the batch experimental data of magnetic COF was effectively modeled by pseudo-second-order kinetics and the Freundlich isothermal model. The equilibrium adsorption capacities of magnetic COF composite for OPPs ranged from 163.9 to 178.6 mg g(-1), which were about 10 times higher than the amorphous magnetic composite. The adsorption mechanism was further explored to verify the contributions of pi-pi, C...pi, and C...H...S interactions to the adsorption of OPPs on the crystalline magnetic COF. Furthermore, the high removal rate of OPPs from the environmental water and reusability further indicated its potential in real applications as an effective adsorption material.
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