ArticleEnvironmental monitoring and assessment2026
Exploratory ATR-FTIR analysis with spectral deconvolution of polymer-like spectral signatures in suspended matter from the Atoyac River, Mexico.
Article in Environmental monitoring and assessment, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
The Atoyac River is one of the most impacted freshwater systems in central Mexico due to sustained industrial, agricultural, and domestic discharges. Despite increasing concern regarding plastic contamination in rivers, information on polymer-related materials in this system remains limited. In this study, a qualitative and exploratory assessment of polymer-like spectral features in suspended matter was conducted along a 43-km section of the Atoyac River. Water samples were collected at six sites representing contrasting land use influences and analyzed directly by ATR-FTIR spectroscopy without chemical or enzymatic removal of organic matter. To improve interpretation of the complex spectra obtained from this highly polluted matrix, Gaussian deconvolution was applied to overlapping absorption regions. Recurrent infrared bands compatible with aliphatic, aromatic, ester, carbonate, and amide-containing structures were detected, showing spectral similarity to common synthetic polymers such as polyethylene-, polypropylene-, polyethylene terephthalate-, polystyrene-, polycarbonate-, and polyamide-like materials. A prominent absorption near 1121 cm⁻
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