Experimental Studies of Barite Growth Using Hydrothermal Atomic Force Microscopy in Alkali Metal Salt Solutions at 108 C
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Wright State University / OhioLINK
2019
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| Online Access: | http://rave.ohiolink.edu/etdc/view?acc_num=wright1567186567015893 |
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ndltd-OhioLink-oai-etd.ohiolink.edu-wright15671865670158932021-08-03T07:12:54Z Experimental Studies of Barite Growth Using Hydrothermal Atomic Force Microscopy in Alkali Metal Salt Solutions at 108 C Ahmed, Sohan Chemistry Analytical Chemistry Barite growth alkali metal chloride salts Barite (BaSO4) growth on the (001) surface was studied under solutions of alkali metal chloride salts (LiCl, NaCl, KCl, RbCl and CsCl) as a function of saturation index and ionic strength of the salts at 108 C. When LiCl was used as the background electrolyte, growth hillocks on the barite surface consisted of both [010] steps and <120> steps at ionic strengths of 0.05 and 0.1 M, but [010] steps were not observed at lower ionic strength. In NaCl solutions, hillocks displayed greater prominence of the [010] steps when compared with LiCl. From the saturation state dependent studies, it was found that the kinetic coefficient for step growth increased by 200% when ionic strength increased from 0.01 M LiCl to 0.1 M LiCl. When KCl was used as the background electrolyte, conversion from a surface dominated by <120> steps to a surface consisting primarily of [010] steps was observed, however, a thorough explanation for this phenomenon was hampered by changes in the surface – tip interaction which led to poorly resolved surface features. When RbCl or CsCl was used as the background electrolyte, the growth of hillocks was partially or completely inhibited. The larger cations thus may behave as impurities whose interactions with the kink sites serve to block attachment of barium ions to sulfate-terminated kink sites. 2019-09-04 English text Wright State University / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=wright1567186567015893 http://rave.ohiolink.edu/etdc/view?acc_num=wright1567186567015893 unrestricted This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws. |
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NDLTD |
| language |
English |
| sources |
NDLTD |
| topic |
Chemistry Analytical Chemistry Barite growth alkali metal chloride salts |
| spellingShingle |
Chemistry Analytical Chemistry Barite growth alkali metal chloride salts Ahmed, Sohan Experimental Studies of Barite Growth Using Hydrothermal Atomic Force Microscopy in Alkali Metal Salt Solutions at 108 C |
| author |
Ahmed, Sohan |
| author_facet |
Ahmed, Sohan |
| author_sort |
Ahmed, Sohan |
| title |
Experimental Studies of Barite Growth Using Hydrothermal Atomic Force Microscopy in Alkali Metal Salt Solutions at 108 C |
| title_short |
Experimental Studies of Barite Growth Using Hydrothermal Atomic Force Microscopy in Alkali Metal Salt Solutions at 108 C |
| title_full |
Experimental Studies of Barite Growth Using Hydrothermal Atomic Force Microscopy in Alkali Metal Salt Solutions at 108 C |
| title_fullStr |
Experimental Studies of Barite Growth Using Hydrothermal Atomic Force Microscopy in Alkali Metal Salt Solutions at 108 C |
| title_full_unstemmed |
Experimental Studies of Barite Growth Using Hydrothermal Atomic Force Microscopy in Alkali Metal Salt Solutions at 108 C |
| title_sort |
experimental studies of barite growth using hydrothermal atomic force microscopy in alkali metal salt solutions at 108 c |
| publisher |
Wright State University / OhioLINK |
| publishDate |
2019 |
| url |
http://rave.ohiolink.edu/etdc/view?acc_num=wright1567186567015893 |
| work_keys_str_mv |
AT ahmedsohan experimentalstudiesofbaritegrowthusinghydrothermalatomicforcemicroscopyinalkalimetalsaltsolutionsat108c |
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1719456434597396480 |