Journal
INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY
Volume 102, Issue 15, Pages 3471-3484Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/03067319.2020.1770243
Keywords
Benzene and phenol pollutants; graphitic carbon nitride; halloysite nanotubes; microextraction in packed syringe; polymer ionic liquid
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Funding
- Food and Drug Safety Evaluation Research Centre of Jundishapur University of Medical Sciences of Ahvaz
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A novel sorbent consisting of graphitic carbon nitride/polymer ionic liquid connected to halloysite nanotubes was fabricated and used for the extraction of benzene and phenol pollutants from water samples. The sorbent exhibited good extraction efficiency and could be embedded in a syringe device without filtration or centrifugation steps. The extraction parameters were optimized to achieve high sensitivity and good recovery rates.
In this paper, a novel sorbent consisting of graphitic carbon nitride/polymer ionic liquid connected to halloysite nanotubes (g-C3N4-IL@HNT) was fabricated and used for benzene and phenol pollutant extraction from water samples. This mixed-mode sorbent contains multifunctional groups that allow interaction with several analytes, and because of its porosity, it can be embedded in a syringe device as the extractant without any filtration or centrifugation steps. A high-performance liquid chromatography-ultraviolet was used for the detection of analytes. The composition and morphology of the sorbent have been investigated by Fourier-transform infrared spectroscopy, scanning electron microscopy and energy-dispersive spectroscopy. In this work, parameters affecting the extraction methodology such as elution solvent and its volume, number of absorption cycles, number of solvent cycles, salt effect and matrix effect were investigated and optimised. Under the optimal conditions, a linear calibration curve was obtained in the range of 5-1000 mu g L-1(r(2) > 0.996) with detection limits (S/N = 3) of 0.5-1 mu g L-1. The g-C3N4-IL@HNT showed proper characteristics for the extraction of benzene and phenol pollutant residues in the environmental water samples with recoveries between 71% and 104.8% and the relative standard deviation of 6.6-8.6% (intra-day) and 9-11% (inter-day).
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