Source: Dan Hawkes
Elucidating dissolution kinetics and mechanisms at carbonate
mineral–water interfaces is essential to many environmental and
geochemical processes, including geologic CO2 sequestration
in deep aquifers. ESD’s Kevin Knauss and others investigated the effects
of background electrolytes on dolomite (CaMg(CO3)2)
reactivity by measuring step dissolution rates using in situ
hydrothermal atomic force microscopy (HAFM) at 90°C. HAFM results
demonstrated that dolomite step retreat rates increased with increasing
solution ionic strength and decreasing pH.
Citation: Xu, M., K. Sullivan G. Van Ness, K.G. Knauss, and S.R.
Higgins (2013), Dissolution kinetics and mechanisms at dolomite-water
interfaces: Effects of electrolyte-specific ionic strength.
Environmental Science & Technology 47(1), 110–118.
Funding Source: BES