2011 Volume 72 Issue 1 Pages 41-55
Concentrations of chlorofluorocarbons (CFCs) in lake waters of Japan were determined for the first time. A high concentration of CFC-113 not explained by its atmospheric partial pressure was detected in Lake Suwa. That might be due to the prior industrial use of CFC-113, which polluted the soil and grondwater in the area, thus releasing CFC-113 form water of Lake Suwa into the atmosphere. On the other hand, the concentration of CFCs in the water of Lake Kizaki was explained by the gas liquid equilibrium. Vertical distributions of both CFCs and major ions in the lake water reflected the thermal stratification of Lake Kizaki. It was confirmed that CFCs acted as useful chemical tracers for determining the mixing and circulation of lake water.
