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@article{Al-Mahrouqi and Vinogradov:2016:10.1002/2016GL071151,
author = {Al-Mahrouqi and Vinogradov, J and Jackson, MD},
doi = {10.1002/2016GL071151},
journal = {Geophysical Research Letters},
pages = {11578--11587},
title = {Temperature-dependence of the zeta potential in intact natural carbonates},
url = {http://dx.doi.org/10.1002/2016GL071151},
volume = {43},
year = {2016}
}
TY - JOUR
AB - The zeta potential is a measure of the electrical charge on mineral surfaces and is an important control on subsurface geophysical monitoring, adsorption of polar species in aquifers, and rock wettability. We report the first measurements of zeta potential in intact, water-saturated, natural carbonate samples at temperatures up to 120°C. The zeta potential is negative and decreases in magnitude with increasing temperature at low ionic strength (0.01 M NaCl, comparable to potable water) but is independent of temperature at high ionic strength (0.5 M NaCl, comparable to seawater). The equilibrium calcium concentration resulting from carbonate dissolution also increases with increasing temperature at low ionic strength but is independent of temperature at high ionic strength. The temperature dependence of the zeta potential is correlated with the temperature dependence of the equilibrium calcium concentration and shows a Nernstian linear relationship. Our findings are applicable to many subsurface carbonate rocks at elevated temperature.
AU - Al-Mahrouqi
AU - Vinogradov,J
AU - Jackson,MD
DO - 10.1002/2016GL071151
EP - 11587
PY - 2016///
SN - 1944-8007
SP - 11578
TI - Temperature-dependence of the zeta potential in intact natural carbonates
T2 - Geophysical Research Letters
UR - http://dx.doi.org/10.1002/2016GL071151
UR - http://hdl.handle.net/10044/1/42366
VL - 43
ER -