Porous chlorine-functionalized covalent organic framework anchored graphene aerogel composite for synergically enhanced solid phase microextraction of polychlorinated naphthalene in environmental water

• Published in: Journal of hazardous materials 2024-05, Vol.469, p.133909-133909, Article 133909
• Main Authors: Yang, Lansen, Li, Pengfei, Han, Yehong, Han, Dandan, Yan, Hongyuan
• Format: Article
• Language: English
• Subjects: Emerging organic pollutants; Environmental water; High-efficient enrichment; Polychlorinated naphthalenes; Solid-phase microextraction
• ISSN: 0304-3894; 1873-3336
• DOI: 10.1016/j.jhazmat.2024.133909

The residues of polychlorinated naphthalenes (PCNs) produced in multiple industrial production and life processes are continuously entering environmental waters through atmospheric deposition and land drainage, and the water pollution caused by PCNs is continuing public concern due to their potential threat to aquatic ecosystems and public health. Herein, a new chlorine-functionalized covalent organic framework anchored graphene aerogel (COF-GA) was synthesized by covalent modification technology and used as fiber coating of solid-phase microextraction for synergically enhanced extraction of PCNs in environmental water. The extraction efficiency of COF-GA coated fiber was superior to commercial fiber due to the multiple interactions (π-π, hydrophobic interaction, and halogen bonding interaction). The COF-GA coated fiber has good stability, can avoid water vapor interference at 80 °C for a long time (30 −50 min) to maintain adsorption equilibrium, and can be reused at least 96 times. Combined with gas chromatography-tandem mass spectrometry, a sensitive method for the high-efficient enrichment (enrichment factors were 501 −7453 folds) and ultra-sensitive detection (LODs were 0.001 −0.428 pg/mL) of PCNs in environmental water was established. The enrichment factor for PCNs is significantly higher than in previous studies. This proposed method provides new technical support for the daily monitoring and risk assessment of trace PCNs in environmental water. [Display omitted] •A hydrophobic COF-GA was developed by covalent modification technology.•The developed COF-GA was used as a solid-phase microextraction fiber coating.•An ultra-sensitive detection method for PCNs in water was developed.•The proposed assay showed high enrichment, high sensitivity, and high precision.•Multiple interactions between COF-GA and PCNs were summarized.