ChemInform Abstract: CERTAIN FEATURES OF THE RADICAL COTELOMERIZATION OF ETHYLENE AND VINYL CHLORIDE WITH CARBON TETRACHLORIDE

1978 ◽  
Vol 9 (9) ◽  
Author(s):  
T. A. ONISHCHENKO ◽  
B. L. ZHUK ◽  
R. KH. FREIDLINA
Keyword(s):  
Carbon Tetrachloride ◽  
Vinyl Chloride

PHOTOLYSE DE L'IODURE DE VINYLE EN SOLUTION DANS LE TETRACHLORURE DE CARBONE

1964 ◽  
Vol 42 (10) ◽  
pp. 2262-2274 ◽  
Author(s):  
Pierre C. Roberge ◽  
Jan A. Herman
Keyword(s):  
Carbon Tetrachloride ◽  
Vinyl Chloride ◽  
Hydrogen Iodide ◽  
Diffusion Controlled ◽  
Vinyl Iodide

The photolysis of vinyl iodide in carbon tetrachloride solutions gives several products among which the most important are: acetylene, hydrogen iodide, iodine, ethylene, and vinyl chloride. A mechanism based on diffusion-controlled disproportionation of geminate radicals, as first proposed by Hamill, agrees well with the observed phenomena. To explain the diminishing production of ethylene and iodine with increasing concentration of the monomer, it is necessary to postulate a telomerization of the vinyl iodide.

Risk assessment and management of drinking water pollutants in Korea

1997 ◽  
Vol 36 (12) ◽  
pp. 309-323 ◽  
Author(s):  
Chung Yong ◽  
Shin Dongchun ◽  
Park Seongeun ◽  
Lim Yeongwook ◽  
Choi Yoonho ◽  
...  
Keyword(s):  
Risk Assessment ◽  
Drinking Water ◽  
Carbon Tetrachloride ◽  
Health Risk ◽  
Water Supply ◽  
Vinyl Chloride ◽  
Tap Water ◽  
Hazard Identification ◽  
Weight Of Evidence ◽  
Water Pollutants

The contamination of drinking water supply is becoming an increasingly serious problem in Korea. In order to protect public health, there is a need to regulate drinking water pollutants. The purpose of this project, a national project for three years starting from 1992 to 1995, is to assess the health risk of pollutants in drinking water and recommend guidelines and management plans for maintaining good quality of drinking water. This study was conducted to monitor 80 species of chemicals including volatile organic compounds(VOCs), polycyclic aromatic hydrocarbons(PAHs), pesticides and metals in six major rivers and their distribution system for drinking water in Korea, and evaluate health risk due to exposure to these chemicals through four main steps of risk assessment in drinking water. In hazard identification, 80 species of chemicals were identified by the US EPA classification system. In their steps of exposure assessment, sampling of raw, treated and drinking water from the public water supply system have been conducted from 1993 to 1995, and 80 chemicals were analyzed. In dose-response assessment, cancer potencies, unit risk estimates and virtual safety doses of carcinogens were obtained by TOX-RISK, and reference doses and lifetime health advisories of noncarcinogens were calculated. Finally, in the risk characterization of detected chemicals, health risk due to exposure to carcinogens (weight of evidence, A or B) such as vinyl chloride, carbon tetrachloride, 1,2-dichloroethane, benzen, 1,1,1,2-tetrachloroethane, trihalomethanes(THMs), lead and arsenic of tap water in several cities exceeded 10−5 level. We suggest that non-regulated chemicals such as vinyl chloride, carbon tetrachloride and 1,2-dichloroethane should be monitored periodically and be regulated by the Drinking Water Management Act.

1H and13C NMR study of vinyl chloride telomers with carbon tetrachloride

1984 ◽  
Vol 22 (12) ◽  
pp. 792-793 ◽  
Author(s):  
J. M. Bessière ◽  
B. Boutevin ◽  
M. Taha ◽  
F. Vial
Keyword(s):  
Carbon Tetrachloride ◽  
Vinyl Chloride ◽  
1H And13c Nmr ◽  
Nmr Study
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