Publication Date
2017
Document Type
Thesis
Committee Members
David Dolson (Committee Member), Steven Higgins (Advisor), Ioana Sizemore (Committee Member)
Degree Name
Master of Science (MS)
Abstract
To better understand the role of spectator ions in barite growth, the kinetics of step edge growth on barite (001) surfaces were studied under various salt solutions. Hydrothermal Atomic Force Microscopy (HAFM) was used to investigate the effect of background electrolytes (NaCl, NaBr and NaNO3) as a function of saturation index and ionic strength (I) on barite growth sourced at dislocations at 108 oC. Results show that hillock morphology is affected by I, as well as type of anion, where the prevalence of steps aligned on the [010] direction is highest under Cl- There is a modest increase in kinetic coefficient of 55-130% with a ten-fold increase in I for each salt. In comparing the kinetic coefficients of the salts at low ionic strength (0.01 M), there is a moderate difference, suggesting that the anion may play a role in barium attachment.
Page Count
98
Department or Program
Department of Chemistry
Year Degree Awarded
2017
Copyright
Copyright 2017, all rights reserved. My ETD will be available under the "Fair Use" terms of copyright law.
