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- W2356985103 abstract "Chlorofluorocarbons(CFCs) have been widely used as tools and tracers to date younger groundwater over the world in the past 30 years.CFCs such as CFC-11,CFC-12 and CFC-113 are organic compounds that contain chlorine and fluorine.They have been largely produced since the 1930s and the annual world production of CFCs peaked with 106 metric tons.CFCs can accumulate in the atmosphere and are responsible for depleting stratospheric ozone.Because of their volatile and chemical stability,we can date the groundwater age in the target area through contrasting the equilibrium pressure of CFCs in groundwater with the standard curve of CFCs concentration in the atmosphere.Since the first time use of CFCs to date groundwater age in United States in the mid-1970s,CFCs groundwater age-dating has attracted much attention.The CFCs technique is used to date groundwater age,reveal the hydraulic linkage between shallow and deep groundwater,and estimate the various groundwater recharge sources.However,this technology has not been well adopted and evaluated in developing countries such as China.This article introduces the characteristics,production and emission of CFCs,presents the key procedures of CFCs groundwater testing such as field sampling,extraction and determination of CFCs,and age dating,and reviews the applications of using the CFCs groundwater age-dating technique.Comparing to the groundwater age-dating techniques using other tracers(SF6,3H/3He,etc.),the CFCs technique offers significant advantages in terms of simplicity,reduced costs,and high accuracy,especially for the research areas where the atmospheric concentration of CFCs has been monitored.We conclude that the CFCs groundwater age-dating technique should prove useful and valuable in groundwater-related research and application." @default.
- W2356985103 created "2016-06-24" @default.
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- W2356985103 date "2012-01-01" @default.
- W2356985103 modified "2023-09-26" @default.
- W2356985103 title "Worldwide application and prospective of CFCs groundwater age-dating method" @default.
- W2356985103 hasPublicationYear "2012" @default.
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