A note on hydrogen isotope fractionation involving acidic and basic solutions

Oxygen, hydrogen, and sulfur isotope systematics of the crater lake system of Poas Volcano, Costa Rica.

“…The calculations of Deines (1979) indicate that the low 6D-3180 slopes of the lake brine are partly related to large increases in lake brine acidity that accompanied the decline and disap pearance of the lake (Rowe et al, 1992b). This hypothesis is supported by comparing the degree of deuterium enrichment in the lake brines relative to AMW (SDbrine SDAMw) as a function of the s stematics of Pods Volcano 275 total acidity of the brine.…”

“…Theoretical modeling of the isotopic fractionation that accompanies the evaporation of concentrated acid solutions, indicates that vapor from highly acidic solutions will be enriched in deuterium relative to vapor derived from pure water (Deines, 1979). During evaporation, vapor released from an acidic solution will be enriched in D relative to vapor released from pure water.…”

“…Fractionation factors for the various acids as a function of temperature and acidity have not been determined. According to Deines (1979) however, evaporation of a 10 wt% HCl solution at 20°C would yield water vapor that is approximately 20%o heavier than water vapor released from pure water at the same temperature.…”