Determination of polyacrylamide based flocculants in sewage sludge by off-line thermochemolysis-GC–MS analysis

This study aimed to develop an offline thermochemolysis method for the determination of cationic polyacrylamide (cPAA) flocculants in environmental samples, using trimethylanilline hydroxide as a thermochemolytic agent. This method induces degradation of cPAA into defined substituted glutarimide der...

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Bibliographic Details
Published in:Discover water 2023-02, Vol.3 (1), p.5-9, Article 5
Main Authors: Jovancicevic, Ivana, Schwarzbauer, Jan
Format: Article
Language:English
Subjects:
Aquatic Pollution
Chromatography
Coastal Sciences
Earth and Environmental Science
Earth Sciences
Experiments
Glutarimide
Hydrogeology
Marine & Freshwater Sciences
Mass spectrometry
Molecular weight
Oceanography
Off-line thermochemolysis
Pollutants
Polyacrylamide
Polymers
Scientific imaging
Sewage sludge
Sludge
Waste Water Technology
Water Management
Water Pollution Control
Water treatment
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Summary:This study aimed to develop an offline thermochemolysis method for the determination of cationic polyacrylamide (cPAA) flocculants in environmental samples, using trimethylanilline hydroxide as a thermochemolytic agent. This method induces degradation of cPAA into defined substituted glutarimide derivates, as specific pyrolysis products. These pyrolysis products appeared in typical pattern of homologues allowing not only an unambiguous identification of the polymer but, more important, also a reliable pyrolysis based quantification in environmental concentration levels. Pyrolysis analysis were carried out on pure cPAA and spiked samples for method optimization, as well as on four sewage sludge samples from Germany as proof of applicability. All four specific degradation products were identified in three out of four sewage sludge samples indicating that the developed TMAH-thermochemolysis method is suitable for PAA detection in complex matrices and on environmentally relevant concentration levels. Nevertheless, experiments on sewage sludge samples revealed cPAA contamination in a concentration range between 29 and 76 μg/g. However, it has to be noted that the presence of all four specific degradation products has to be validated in order to have a doubtless cPAA confirmation in environmental samples.
ISSN:2730-647X
2730-647X
DOI:10.1007/s43832-023-00029-x