Efficient extraction of trace organochlorine pesticides from environmental samples by a polyacrylonitrile electrospun nanofiber membrane modified with covalent organic framework
Jiachen Ma , Zhendong Yu , Shuting Liu , Yicong Chen , Yuancai Lv , Yifan Liu , Chunxiang Lin , Xiaoxia Ye , Yongqian Shi , Minghua Liu , Jingyang Tian
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引用次数: 30
Abstract
Detecting and analyzing of the trace organochlorine pesticides (OCPs) in the real water has become a big challenge. In this work, a novel functional electrospun nanofiber membrane (PAN@COFs) was synthesized through the in situ growth of covalent organic frameworks (COFs) on a polyacrylonitrile electrospun nanofiber membranes under room temperature and used in the solid-phase micro-extraction (SPME) to enrich trace organochlorine pesticides (OCPs) in water. The resulted PAN@COFs composite consisted of numerous nanofibers coated ample porous COFs spheres (~ 500 nm) and owned stable crystal structure, abundant functional groups, good stability. In addition, the enrichment experiments clearly revealed that PAN@COFs exhibited rather outstanding performance on adsorbing the trace OCPs (as low as 10 ng L−1) with the enrichment of 482–2686 times. Besides, PAN@COFs displayed good reusability and could be reused 100 times. Notably, in the real water samples (sea water and river water), the high enrichment factors and recovery rates strongly confirmed the feasibility of PAN@COFs for detecting the trace OCPs. Furthermore, due to the synergy of π-π stacking interaction and hydrophobic interaction between the OCPs molecules and PAN@COFs, the OCPs could be efficiently adsorbed on PAN@COFs, even under the extremely low driving force.
真实水体中痕量有机氯农药的检测与分析已成为一个巨大的挑战。在室温下,通过在聚丙烯腈静电纺纳米纤维膜上原位生长共价有机框架(COFs),合成了一种新型的功能静电纺纳米纤维膜(PAN@COFs),并将其用于固相微萃取(SPME)富集水中痕量有机氯农药(OCPs)。得到的PAN@COFs复合材料由大量纳米纤维包覆充足的多孔COFs球(~ 500 nm)组成,具有稳定的晶体结构、丰富的官能团和良好的稳定性。此外,富集实验清楚地表明PAN@COFs对痕量OCPs(低至10 ng L−1)的吸附性能相当优异,富集量为482-2686倍。此外,PAN@COFs具有良好的可重用性,可重复使用100次。值得注意的是,在实际水样(海水和河水)中,高富集系数和高回收率有力地证实了PAN@COFs检测痕量OCPs的可行性。此外,由于OCPs分子与PAN@COFs之间的π-π堆积相互作用和疏水相互作用的协同作用,即使在极低的驱动力下,OCPs也可以有效地吸附在PAN@COFs上。
期刊介绍:
The Journal of Hazardous Materials serves as a global platform for promoting cutting-edge research in the field of Environmental Science and Engineering. Our publication features a wide range of articles, including full-length research papers, review articles, and perspectives, with the aim of enhancing our understanding of the dangers and risks associated with various materials concerning public health and the environment. It is important to note that the term "environmental contaminants" refers specifically to substances that pose hazardous effects through contamination, while excluding those that do not have such impacts on the environment or human health. Moreover, we emphasize the distinction between wastes and hazardous materials in order to provide further clarity on the scope of the journal. We have a keen interest in exploring specific compounds and microbial agents that have adverse effects on the environment.