Trichloroethylene, tetrachloroethylene and carbon tetrachloride in an urban atmosphere: mixing ratios and temporal patterns

摘要: The measurement of halogenated hydrocarbons in the atmosphere is a matter great interest owing to their adverse effects on human health and environment. This work focused three toxic chlorinated hydrocarbons: trichloroethylene (TCE), tetrachloroethylene (PCE), carbon tetrachloride (CTC). Moreover, CTC greenhouse gas an ozone depleting gas, restricted under Montreal Protocol. Owing low reactivity, target are considered be persistent and, thus, many measurements only address mean mixing ratios (a concentration measure expressed as mol/mol). Consequently, most reported data have temporal resolution daily, seasonal or yearly ratios, obtained with few measurements. In study this paper hourly were performed for long period time: almost two years TCE PCE, one year CTC. main objective was variability chlorin...