title: Enantiomeric composition of polycyclic musks in sediments from the Pearl River and Suzhou Creek.
abstract: Due to differences in stereostructure, enantiomeric compositions and enantiomeric ratios (ERs) of chiral compounds can be used to discriminate environmental processes such as abiotic and biotic degradation/transformation. In this study, the ERs of two chiral polycyclic musks, 1,3,4,6,7,8-hexahydro-4,6,6,7,8,8-hexamethylcyclopenta(g)-2-benzopyran (HHCB) and 7-acetyl-1,1,3,4,4,6-hexamethyl-1,2,3,4-tetrahydronaphthalene (AHTN), were investigated in the sediments of Zhujiang River and Dongjiang River in the Pearl River Delta (PRD), as well as in those of Suzhou Creek in Shanghai City. The results indicated that ER cis of HHCB varied significantly, ranging from 1.09 to 1.53 and 1.40 to 1.48 in the PRD and Suzhou Creek samples, respectively, whereas ER trans of HHCB exhibited limited variation, ranging from 0.98 to 1.10 and 0.98 to 1.05 for Pearl River and Suzhou Creek samples, respectively. In addition, ERs of AHTN varied substantially from 1.10 to 1.34 and 1.17 to 1.28 in the PRD and Suzhou Creek, respectively. These results suggest that HHCB in the sediment in the study area underwent biotic degradation and the preferential biotransformation isomer was (4R,7S)-HHCB, while AHTN simultaneously underwent a certain degree of biotic degradation/transformation.
authors.affiliation: State Key Laboratory of Organic Geochemistry, Guangdong Key Laboratory of Environment and Resources, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, 510640, Guangzhou, China.
authors.forename: Han
authors.initials: H
authors.lastname: Song
authors.forename: Xiangying
authors.initials: X
authors.lastname: Zeng
authors.forename: Zhiqiang
authors.initials: Z
authors.lastname: Yu
authors.forename: Delin
authors.initials: D
authors.lastname: Zhang
authors.forename: Shuxia
authors.initials: S
authors.lastname: Cao
authors.forename: Wenlan
authors.initials: W
authors.lastname: Shao
authors.forename: Guoying
authors.initials: G
authors.lastname: Sheng
authors.forename: Jiamo
authors.initials: J
authors.lastname: Fu
mesh_terms: D002681:China; D002845:Chromatography; D004784:Environmental Monitoring; D019015:Geologic Sediments / Q000737:chemistry*; D015394:Molecular Structure; D010476:Perfume / Q000737:chemistry*; D011083:Polycyclic Compounds / Q000737:chemistry*; D045483:Rivers / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000737:chemistry*
chemical_list: D010476:Perfume; D011083:Polycyclic Compounds; D014874:Water Pollutants, Chemical