DOI: 10.1002/2016GL071151
论文题名: Temperature dependence of the zeta potential in intact natural carbonates
作者: Al Mahrouqi D. ; Vinogradov J. ; Jackson M.D.
刊名: Geophysical Research Letters
ISSN: 0094-8408
EISSN: 1944-8139
出版年: 2016
卷: 43, 期: 22 起始页码: 11578
结束页码: 11587
语种: 英语
英文关键词: elevated temperature
; intact carbonates
; pCa
; potential determining ions
; surface charge
; zeta potential
Scopus关键词: Aquifers
; Calcium
; Calcium carbonate
; Carbonates
; Carbonation
; Hydrogeology
; Minerals
; Potable water
; Surface charge
; Temperature
; Temperature distribution
; Zeta potential
; Calcium concentration
; Elevated temperature
; Geophysical monitoring
; High ionic strength
; Increasing temperatures
; Linear relationships
; Potential-determining ions
; Temperature dependence
; Ionic strength
英文摘要: 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. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85002690818&doi=10.1002%2f2016GL071151&partnerID=40&md5=59f011f5ceaa61a3a42e6423dd3617c8
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9371
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Department of Earth Science and Engineering, Imperial College London, London, United Kingdom
Recommended Citation:
Al Mahrouqi D.,Vinogradov J.,Jackson M.D.. Temperature dependence of the zeta potential in intact natural carbonates[J]. Geophysical Research Letters,2016-01-01,43(22).