Abstract
Short-chain fatty acids (SCFAs) are among the active metabolites in biological process both in the intestinal tract and the bioconversion of organic wastes, which has resulted in various human diseases and environmental problems. In order to accurately detect SCFAs, we introduced a novel extraction sorbent. Electrospun polyacrylonitrile (PAN) nanofiber membrane was synthesized, then poly (3, 4-Ethylenedioxythiophene) (PEDOT) was deposited onto the surface of electrospun PAN nanofibers by in situ polymerization. The morphology of the composite PAN/PEDOT nanofiber was characterized by scanning electronic microscopy (SEM) and FTIR spectrum. PAN/PEDOT was used to isolate and concentrate the SCFAs in waste water and fecal samples before gas chromatography mass spectrometry (GC-MS) analysis. The analytical method was evaluated systematically, and low limits of detection (LODs) of 0.34–0.87 μg/L and good linearity (R2 ≥ 0.9953) were obtained. The method was applied successfully for the determination of SCFAs in waste water and fecal samples, with good recovery (87.5–104.6%) and satisfactory reproducibility (relative standard deviation: 6.5–14.1%). The results indicated that the proposed method can be used as a potential approach for the determination of SCFAs with high sensitivity in waste water and biological samples.
Highlights
Accepted: 6 November 2021Short-chain fatty acids (SCFAs) are monocarboxylic aliphatic acids with 2 to 8 carbon atoms
Characterization of the PAN/PEDOT Nanofiber served by a Zeiss Ultra Plus scanning electron microscope (SEM) (Oberkochen, Germany)
A convenient, simple, and inexpensive method based on solid phase extraction of SCFAs with PAN/PEDOT nanofiber coupled with gas chromatography–mass spectrometry (GC–MS) was reported, and the proposed method was successfully applied for the determination of SCFAs in waste water and fecal samples
Summary
Accepted: 6 November 2021Short-chain fatty acids (SCFAs) are monocarboxylic aliphatic acids with 2 to 8 carbon atoms. In the production of anaerobic biodegradation of organic compounds, SCFAs are important intermediates in the conversion of organic waste to methane [2]. Can be used in wastewater treatment for the biological removal of nitrogen and phosphorus. Domestic sewage contains various organic compounds that are potential sources for resource recovery [5]. Bioconversion of these wastes into value-added products to minimize the negative environmental impact will benefit the development of society. SCFAs originating from anaerobic fermentation of organic wastes could solve the problem of carbon source shortages in waste water treatment plants (WWTPs) to improve the operating performances of biological nutrient removal [6]. The accurate determination of SCFAs’ concentration at different stages of wastewater treatment and in the environment is important
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