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Photochemistry of 2,2-dichloroethanol: kinetics and mechanism of the reaction with Cl atoms and OH radicals
- Source :
- Environmental Science: Processes & Impacts. 22:719-727
- Publication Year :
- 2020
- Publisher :
- Royal Society of Chemistry (RSC), 2020.
-
Abstract
- Smog chamber/FTIR techniques were used to investigate the kinetics and mechanism of the Cl atom and OH radical initiated oxidation of 2,2-dichloroethanol at (296 ± 1) K. Relative rate methods were used to measure k(Cl + CHCl2CH2OH) = (5.87 ± 0.96) × 10-12 and k(OH + CHCl2CH2OH) = (5.54 ± 1.94) × 10-13 cm3 molecule-1 s-1. Chlorine atom initiated oxidation of CHCl2CH2OH in one atmosphere of air gives HCOCl, CHCl2CHO, and COCl2 in yields of (62 ± 5)%, (39 ± 10)%, and (8 ± 2)%, respectively. The rate constant k(Cl + CHCl2CHO) = (8.3 ± 16) × 10-12 cm3 molecule-1 s-1 was determined and the IR spectra of CHCl2CHO is reported for the first time. The atmospheric lifetime for CHCl2CH2OH is estimated as 21 days. The experimental results are discussed in the context of the atmospheric chemistry of chlorinated alcohols.
- Subjects :
- 010504 meteorology & atmospheric sciences
Atmosphere
Hydroxyl Radical
Radical
Kinetics
Public Health, Environmental and Occupational Health
Analytical chemistry
Ethylene Chlorohydrin
Infrared spectroscopy
chemistry.chemical_element
Context (language use)
General Medicine
010501 environmental sciences
Management, Monitoring, Policy and Law
01 natural sciences
chemistry.chemical_compound
Reaction rate constant
chemistry
Atmospheric chemistry
Chlorine
Environmental Chemistry
Hydroxyl radical
0105 earth and related environmental sciences
Subjects
Details
- ISSN :
- 20507895 and 20507887
- Volume :
- 22
- Database :
- OpenAIRE
- Journal :
- Environmental Science: Processes & Impacts
- Accession number :
- edsair.doi.dedup.....975ebdcd71fc32e8119b93ee6869e30b