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Title: Organic photochemistry: simulated atmospheric photodecomposition rates of methylene chloride, 1,1,1-trichloroethane, trichloroethylene, tetrachloroethylene, and other compounds

Abstract

To estimate the decomposition rates of chloro compounds in the atmosphere, we carried out laboratory studies on the photolysis rates of the four title compounds, six other chlorohydrocarbons, and 23 other organic compounds under simulated atmospheric conditions. In the presence of nitric oxide, vinylidene chloride, cis- and trans-dichloroethylene, trichloroethylene, and vinyl chloride decomposed at moderate rates (estimated half-lives of 5 to 12 h under bright sunlight) when compared with a series of standard hydrocarbons. Chlorobenzene, tetrachloroethylene, and 1,1,2-trichloroethane decomposed slowly (estimated half-lives 20 to 40 h). Methylene chloride and 1,1,1-trichloroethane did not decompose (half-lives >250 and much greater than 1700 h respectively). The photodecomposition rates of several chloro compounds were determined in mixtures with other organic compounds and also in the presence of nitrogen dioxide, ozone, chloral, acetaldehyde, chlorine, and phosgene. The presence of hydrocarbons reduced the decomposition rates of several chloroethylenes.

Authors:
; ;
Publication Date:
Research Org.:
Dow Chemical Co., Midland, MI
OSTI Identifier:
7122528
Resource Type:
Journal Article
Journal Name:
Environ. Sci. Technol.; (United States)
Additional Journal Information:
Journal Volume: 10:4
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; CHLORINATED ALIPHATIC HYDROCARBONS; PHOTOCHEMISTRY; CHLORINATED AROMATIC HYDROCARBONS; ORGANIC COMPOUNDS; DECOMPOSITION; AIR POLLUTION; CHLORINE COMPOUNDS; HYDROCARBONS; NITROGEN COMPOUNDS; OZONE; AROMATICS; CHEMICAL REACTIONS; CHEMISTRY; HALOGEN COMPOUNDS; HALOGENATED ALIPHATIC HYDROCARBONS; HALOGENATED AROMATIC HYDROCARBONS; ORGANIC CHLORINE COMPOUNDS; ORGANIC HALOGEN COMPOUNDS; POLLUTION; 500200* - Environment, Atmospheric- Chemicals Monitoring & Transport- (-1989)

Citation Formats

Dilling, W.L., Bredeweg, C.J., and Tefertiller, N.B. Organic photochemistry: simulated atmospheric photodecomposition rates of methylene chloride, 1,1,1-trichloroethane, trichloroethylene, tetrachloroethylene, and other compounds. United States: N. p., 1976. Web. doi:10.1021/es60115a006.
Dilling, W.L., Bredeweg, C.J., & Tefertiller, N.B. Organic photochemistry: simulated atmospheric photodecomposition rates of methylene chloride, 1,1,1-trichloroethane, trichloroethylene, tetrachloroethylene, and other compounds. United States. doi:10.1021/es60115a006.
Dilling, W.L., Bredeweg, C.J., and Tefertiller, N.B. Thu . "Organic photochemistry: simulated atmospheric photodecomposition rates of methylene chloride, 1,1,1-trichloroethane, trichloroethylene, tetrachloroethylene, and other compounds". United States. doi:10.1021/es60115a006.
@article{osti_7122528,
title = {Organic photochemistry: simulated atmospheric photodecomposition rates of methylene chloride, 1,1,1-trichloroethane, trichloroethylene, tetrachloroethylene, and other compounds},
author = {Dilling, W.L. and Bredeweg, C.J. and Tefertiller, N.B.},
abstractNote = {To estimate the decomposition rates of chloro compounds in the atmosphere, we carried out laboratory studies on the photolysis rates of the four title compounds, six other chlorohydrocarbons, and 23 other organic compounds under simulated atmospheric conditions. In the presence of nitric oxide, vinylidene chloride, cis- and trans-dichloroethylene, trichloroethylene, and vinyl chloride decomposed at moderate rates (estimated half-lives of 5 to 12 h under bright sunlight) when compared with a series of standard hydrocarbons. Chlorobenzene, tetrachloroethylene, and 1,1,2-trichloroethane decomposed slowly (estimated half-lives 20 to 40 h). Methylene chloride and 1,1,1-trichloroethane did not decompose (half-lives >250 and much greater than 1700 h respectively). The photodecomposition rates of several chloro compounds were determined in mixtures with other organic compounds and also in the presence of nitrogen dioxide, ozone, chloral, acetaldehyde, chlorine, and phosgene. The presence of hydrocarbons reduced the decomposition rates of several chloroethylenes.},
doi = {10.1021/es60115a006},
journal = {Environ. Sci. Technol.; (United States)},
number = ,
volume = 10:4,
place = {United States},
year = {1976},
month = {4}
}