Simultaneous extraction of diverse organic pollutants from environmental water using a magnetic covalent organic framework composite
Simultaneous extraction of diverse organic pollutants from environmental water using a magnetic covalent organic framework composite
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使用磁性共价有机骨架复合材料同时提取环境水中的多种有机污染物
DOI：
10.1016/j.aca.2020.10.019
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发表时间：
2020
影响因子：
6.2
通讯作者：
Zhang Shusheng
中科院分区：
文献类型：
--
作者：
Hu Kai;Cheng Jiamin;Zhang Wenfen;Pang Tiantian;Wu Xiangxiang;Zhang Zhenqiang;Huang Yanjie;Zhao Wenjie;Zhang Shusheng
多环芳烃（PAHs）、四环素（TC）和三苯甲烷染料（TD）是常见的有机污染物，对人体健康和自然界微生物群落构成威胁。在这项工作中，我们报告了一种新的多功能吸附剂的基础上的核壳磁性羧酸官能化的共价有机框架复合材料（Fe 3 O 4 @COF-COOH）的同时吸附这些目标分析物通过混合模式固相萃取。基于Freundlich和Langmuir吸附等温线模型，研究了合成复合材料对多环芳烃、总烃和总烃的吸附行为.结合量子化学计算发现，COF-COOH与客体分子之间存在π-π堆积、氢键和静电引力等多种相互作用。优化了萃取参数，提出了一种新的同时吸附-分步解吸（SASD）富集多环芳烃、总烃和总烃的方法。通过与HPLC-DAD方法联用，验证结果显示所有分析物均具有良好的线性（R2≥ 0.9882）。多环芳烃、TC和TD的检出限分别为0.003-0.008、0.02-0.06和0.006-0.008 μg L− 1。回收率为93.6 - 105.8%，日内RSD为2.2-6.3%，日间RSD为3.2- 6.5%。所获得的结果表明，所提出的使用Fe 3 O 4 @COF-COOH作为吸附剂的SASD策略可以扩展到由痕量多目标分析物组成的其他水溶液。
Polycyclic aromatic hydrocarbons (PAHs), tetracyclines (TCs), and triphenylmethane dyes (TDs) are common organic pollutants, which may threat the human health or natural microbial communities. In this work, we report a novel multifunctional sorbent based on core-shell magnetic carboxylate-functionalized covalent organic frameworks composites (Fe3O4@COF–COOH) for the simultaneous adsorption of these target analytes via mixed-mode solid phase extraction. The behaviors of the synthetic composite for the adsorption of PAHs, TCs, and TDs were evaluated based on the Freundlich and Langmuir isotherm models. In combination with quantum chemistry calculations, it was found that the multiple interactions including π-π stacking, hydrogen bonding, and electrostatic attractions were existed between COF–COOH and guest molecules. The extraction parameters were optimized, and a novel simultaneous absorption-stepwise desorption (SASD) strategy for the enrichment of PAHs, TCs, and TDs was proposed. By coupling with HPLC-DAD method, the validation results revealed good linearities (R2≥ 0.9882) for all analytes. High sensitivity with LODs within the range of 0.003–0.008, 0.02–0.06, and 0.006–0.008 μg L−1were obtained for PAHs, TCs, and TDs, respectively. High recoveries ranging from 93.6 to 105.8% were obtained with intra-day RSDs of 2.2–6.3% and inter-day RSDs of 3.2–6.5%. The obtained results demonstrated that the proposed SASD strategy using Fe3O4@COF–COOH as sorbents can be extended to other aqueous solutions consisting of trace multi-target analytes.