CAS OpenIR
Photoinduced release of odorous volatile organic compounds from aqueous pollutants: The role of reactive oxygen species in increasing risk during cross-media transformation
Lin, Jingyi1,2; Zhao, He1; Cao, Hongbin1; Zhao, Yuehong1,3; Chen, Chuncheng2,4
2022-05-20
Source PublicationSCIENCE OF THE TOTAL ENVIRONMENT
ISSN0048-9697
Volume822Pages:8
AbstractPhotoinduced volatile organic compounds (VOCs) release from fatty alcohols at the air-water interface, has attracted considerable attention. This paper comprehensively explores the release of odorous VOCs from aqueous micropollutants under photoirradiation, especially in terms of the important role of the reactive oxygen species (ROS) in increased risk by cross-media transformation. The formation and distribution of photoinduced VOCs produced by aqueous benzyl alcohol (BzOH), a common ingredient in personal care products, were monitored in situ by online gas chromatography equipped with mass spectrometry and flame ionization detector (GC-MS/FID). The photoreaction of BzOH followed first-order kinetics with a rate constant of 0.0158/min under air. After 180 min of ultraviolet irradiation, the accumulated output of the gas-phase products benzene and benzaldehyde (BA) reached 3.8 mu mol and 2.6 mu mol respectively, being approximately 10 times that under nitrogen. According to electron paramagnetic resonance measurements, singlet oxygen mainly promoted the oxidation of BzOH to BA, which was an important intermediate producing benzene via photocleavage. Odorous alicyclic hydrocarbons were also generated through photorearrangement under nitrogen. On the other hand, the Henry's law constants of the main products were much lower than those of BzOH, indicating that the photoproducts would volatilize from the aqueous phase into the gas phase. The odor threshold of gas-phase products decreased to varying degrees after photoirradiation. Especially for BA, one of the main products, its odor threshold decreased 130 times compared with BzOH. This study shows that the risk of cross-media pollution could significantly increase due to the transformation of aqueous pollutants into odorous VOCs under photoirradiation and provides new insight into its risk prevention.
KeywordPhotochemistry Volatile organic compounds (VOCs) Reactive oxygen species (ROS) Cross-media pollution Benzyl alcohol
DOI10.1016/j.scitotenv.2022.153397
Language英语
WOS KeywordHYDROXYL RADICALS ; SINGLET OXYGEN ; CENTER-DOT ; PHOTOCHEMICAL OXIDATION ; WATER-INTERFACE ; AIR ; OH ; DECOMPOSITION ; MECHANISMS ; SCAVENGERS
Funding ProjectNational Natural Science Foundation of China[51978643] ; Youth Innovation Promotion Association, CAS[2014037] ; 14th Five-year Informatization Plan of Chinese Academy of Sciences, Construction of Scientific Data Center System[WX145XQ07-12]
WOS Research AreaEnvironmental Sciences & Ecology
WOS SubjectEnvironmental Sciences
Funding OrganizationNational Natural Science Foundation of China ; Youth Innovation Promotion Association, CAS ; 14th Five-year Informatization Plan of Chinese Academy of Sciences, Construction of Scientific Data Center System
WOS IDWOS:000766801200006
PublisherELSEVIER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/52447
Collection中国科学院过程工程研究所
Corresponding AuthorZhao, Yuehong
Affiliation1.Chinese Acad Sci, Beijing Engn Res Ctr Proc Pollut Control, CAS Key Lab Green Proc & Engn, Inst Proc Engn,Innovat Acad Green Manufacture, Beijing 100049, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Natl Basic Publ Sci Data Ctr, Beijing 100190, Peoples R China
4.Chinese Acad Sci, Beijing Natl Lab Mol Sci, Key Lab Photochem, CAS Res,Educ Ctr Excellence Mol Sci,Inst Chem, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Lin, Jingyi,Zhao, He,Cao, Hongbin,et al. Photoinduced release of odorous volatile organic compounds from aqueous pollutants: The role of reactive oxygen species in increasing risk during cross-media transformation[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2022,822:8.
APA Lin, Jingyi,Zhao, He,Cao, Hongbin,Zhao, Yuehong,&Chen, Chuncheng.(2022).Photoinduced release of odorous volatile organic compounds from aqueous pollutants: The role of reactive oxygen species in increasing risk during cross-media transformation.SCIENCE OF THE TOTAL ENVIRONMENT,822,8.
MLA Lin, Jingyi,et al."Photoinduced release of odorous volatile organic compounds from aqueous pollutants: The role of reactive oxygen species in increasing risk during cross-media transformation".SCIENCE OF THE TOTAL ENVIRONMENT 822(2022):8.
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