Efficient dispersive solid phase extraction of trace nitrophenol pollutants in water with triazine porous organic polymer modified nanofiber membrane

• Published in: Journal of Chromatography A 2024-02, Vol.1717, p.464707, Article 464707
• Main Authors: Weng, Xin, Liu, Shuting, Huang, Jian, Lv, Yuancai, Liu, Yifan, Li, Xiaojuan, Lin, Chunxiang, Ye, Xiaoxia, Yang, Guifang, Song, Liang, Liu, Minghua
• Format: Article
• Language: English
• Subjects: Adsorption; Dispersive solid phase extraction; Enrichment; Nanofiber membrane; Nitro-phenol; Triazine
• ISSN: 0021-9673
• DOI: 10.1016/j.chroma.2024.464707

•CC-TPS in situ grew on polyacrylonitrile membrane (PAN@CC-TPS) via a hydrothermal method.•PAN@CC-TPS showed outstanding enrichment of trace NPs in water.•PAN@CC-TPS could be used to enrich the NPs (0.05 μg/L) in real water.•Hydrophobic effect, π-π stacking and hydrogen bonding were the main mechanism. Detecting trace endocrine disruptors in water is crucial for evaluating the water quality. In this work, a innovative modified polyacrylonitrile@cyanuric chloride-triphenylphosphine nanofiber membrane (PAN@CC-TPS) was prepared by in situ growing triazine porous organic polymers on the polyacrylonitrile (PAN) nanofibers, and used in the dispersive solid phase extraction (DSPE) to enrich trace nitrobenzene phenols (NPs) in water. The resluted PAN@CC-TPS nanofiber membrane consisted of numerous PAN nanofibers cover with CC-TPS solid spheres (∼2.50 μm) and owned abundant functional groups, excellent enrichment performance and good stability. In addition, the method based on PAN@CC-TPS displayed outstanding capacity in detecting the trace nitrobenzene phenols, with 0.50–1.00 μg/L of the quantification, 0.10–0.80 μg/L of the detection limit, 85.35–113.55 % of the recovery efficiency, and 98.08–103.02 of the enrichment factor, which was comparable to most materials. Meanwhile, when PAN@CC-TPS was adopted in the real water samples (sea water and river water), the high enrichment factors and recovery percentages strongly confirmed the feasibility of PAN@CC-TPS for enriching and detecting the trace NPs. Besides, the related mechanism of extracting NPs on PAN@CC-TPS mainly involved the synergistic effect of hydrogen bonding, π-π stacking and hydrophobic effect.