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Mechanisms leading to enrichment of the atmospheric fluorocarbons CCl 3 F and CCl 2 F 2 in groundwater
Author(s) -
Russell Ann D.,
Thompson Glenn M.
Publication year - 1983
Publication title -
water resources research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.863
H-Index - 217
eISSN - 1944-7973
pISSN - 0043-1397
DOI - 10.1029/wr019i001p00057
Subject(s) - soil water , groundwater , slurry , sorption , environmental chemistry , desorption , moisture , aqueous solution , water content , atmosphere (unit) , chemistry , groundwater recharge , soil science , environmental science , environmental engineering , geology , adsorption , aquifer , geotechnical engineering , meteorology , organic chemistry , physics
Field measurements of CCl 3 F and CCl 2 F 2 in groundwater have shown that concentrations in recharge areas are often higher than those in water at equilibrium with the atmosphere. Sorption and desorption of these fluorocarbons from soil surfaces in response to changes in soil moisture may be responsible for this enrichment. Soil slurry experiments were performed to determine whether concentrations of aqueous fluorocarbons increased when water came into contact with dry soils. The aqueous concentrations of CCl 3 F increased by a factor of 83–981% after mixing water with soils. Concentrations of CCl 2 F 2 in water increased over a range of 34.6–144% for six slurries and decreased in two slurries.