Environmental fate and trophic transfer of synthetic musk compounds and siloxanes in Geum River, Korea: Compound-specific nitrogen isotope analysis of amino acids for accurate trophic position estimation

•Great concentration of SMCs and siloxanes were entered into Geum River through WWTP.•They widespread with a different trend depending on the distance from WWTP.•The δ15N of amino acids provided high resolution foodweb and accurate TP forTMF.•The TMFs of compounds were consistent at the both sites and seasons.•The trophic magnification of these compounds was not occurred in this study.