Volatile Chloro- and Chlorofluorocarbons in Lake Erie — 1977 and 1978
1979; Elsevier BV; Volume: 5; Issue: 2 Linguagem: Inglês
10.1016/s0380-1330(79)72142-3
ISSN2773-0719
AutoresKlaus L.E. Kaiser, Ilze Valdmanis,
Tópico(s)Water Treatment and Disinfection
ResumoWater samples from the central and eastern basins of Lake Erie were analyzed for volatile chloro- and chlorofluorocarbons for a one-week period in each of 1977 and 1978. The following contaminants were observed with mean concentrations and standard deviations in 1978 with the corresponding values for 1977 in parentheses: Dichlorodifluoromethane (Freon 12) 76±38 (73±36) ng°L−1; trichlorofluoromethane (Freon 11) 34±26 (46±40) ng·L−1; chloroform 15±4 ng·L−1; carbon tetrachloride 19±11 (37±20) ng·LT−1; trichloroethylene 20±13 (11±9) ng·L−1. Except for carbon tetrachloride and trichloroethylene, the distribution patterns appear to show little correlation with each other. Chloroform concentrations were relatively uniform, however the carbon tetrachloride and trichloroethylene concentrations appear to be point-source related with discharges along the south shore of Lake Erie. Freon 12 concentrations were generally higher in the eastern basin than in the central basin, while Freon 11 levels were high and relatively uniform throughout the study area.
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