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Occurrence and Degradation Potential of Fluoroalkylsilane Substances as Precursors of Perfluoroalkyl Carboxylic Acids
Zhu, Bao; Jiang, Wei; Wang, Wenxing; Lin, Yongfeng; Ruan, Ting; Jiang, Guibin
2019-05-07
Source PublicationENVIRONMENTAL SCIENCE & TECHNOLOGY
ISSN0013-936X
Volume53Issue:9Pages:4823-4831
AbstractPolyfluoroalkylsilanes (PFASis) are a class of artificial chemicals with wide applications in surface coating, which arouse attention due to their hydrophobic/oleophobic properties and potential biological effects. In this study, a robust high-resolution mass spectrometry method through direct injection into a Fourier transform ion cyclotron resonance instrument was established, with the aid of CF2-scaled Kendrick mass defect analysis and isotope fine structure elucidation. The occurrence of 8:2 polyfluoroalkyl trimethoxysilane (8:2 PTrMeOSi) and 8:2 polyfluoroalkyl triethoxysilane (8:2 PTrEtOSi), as well as their cationic adducts, solvent substitutions, and other compound analogues, were identified in commercial antifingerprint liquid products. In the hydroxyl radical-based total oxidizable precursor assay, differential molar yields of products were observed with regard to varied PFASi carbon-chain lengths and terminal groups. The yields of perfluoroalkyl carboxylic acids (PFCAs) from 8:2 PTrMeOSi conversion were the highest (92 +/- 9%, n = 3), with the C (n - 1) perfluoroheptanoic acid (PFHpA, 49 +/- 11%, n = 3) as the dominating product. Distinct conversion of 8:2 PTrMeOSi in the simulated solar exposure experiments found that C (n) perfluorooctanoic acid (PFOA, 0.6 +/- 0.04 parts per thousand, n = 3) was predominant, and 8:2 fluorotelomer carboxylic acid (8:2 FTCA, 0.59 +/- 0.08 parts per thousand, n = 3), 8:2 fluorotelomer unsaturated carboxylic acid (8:2 FTUCA, 0.09 +/- 0.00 parts per thousand, n = 3) intermediates were also observed. To our knowledge, this is the first report regarding the occurrence and degradation potential of several fluoroalkylsilane substances as PFCA precursors.
Department环境化学与生态毒理学国家重点实验室
Document Type期刊论文
Identifierhttps://ir.rcees.ac.cn/handle/311016/42986
Collection环境化学与生态毒理学国家重点实验室
Affiliation1.Shandong Univ, Environm Res Inst, Binhai Rd 72, Qingdao 266237, Shandong, Peoples R China
2.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Environm Chem & Ecotoxicol, Beijing 100085, Peoples R China
Recommended Citation
GB/T 7714
Zhu, Bao,Jiang, Wei,Wang, Wenxing,et al. Occurrence and Degradation Potential of Fluoroalkylsilane Substances as Precursors of Perfluoroalkyl Carboxylic Acids[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2019,53(9):4823-4831.
APA Zhu, Bao,Jiang, Wei,Wang, Wenxing,Lin, Yongfeng,Ruan, Ting,&Jiang, Guibin.(2019).Occurrence and Degradation Potential of Fluoroalkylsilane Substances as Precursors of Perfluoroalkyl Carboxylic Acids.ENVIRONMENTAL SCIENCE & TECHNOLOGY,53(9),4823-4831.
MLA Zhu, Bao,et al."Occurrence and Degradation Potential of Fluoroalkylsilane Substances as Precursors of Perfluoroalkyl Carboxylic Acids".ENVIRONMENTAL SCIENCE & TECHNOLOGY 53.9(2019):4823-4831.
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