An AFM study of the adsorption of oleic acid on fluorite

Jinhong Zhang, W. Zhang, D. An, Q. Feng

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

An AFM has been applied to study in situ the adsorption of oleic acid on fluorite in aqueous solutions. The AFM images show that fluorite surface becomes smoother with the adsorption of 7 × 10-5M oleic acid solution at pH 9. Force measurement shows that fluorite is strongly positively charged in water at pH6 ,suggesting a neglectable surface carbonation of fluorite. The adsorption of oleic acid at pH 9 renders fluorite more and more negatively charged. The surface morphology change of fluorite as shown by the AFM images suggests that oleic acid chemisorbs on fluorite at pH 9. Increasing temperature can help increase the adsorption of oleic acid on fluorite. It may also improve the lateral polymerization of unsaturated oleic acid on fluorite as suggested by the smoother mineral surface in oleic acid solutions at an elevated temperature.

Original languageEnglish (US)
Title of host publication2014 SME Annual Meeting and Exhibit, SME 2014
Subtitle of host publicationLeadership in Uncertain Times
PublisherSociety for Mining, Metallurgy and Exploration
Pages537-541
Number of pages5
ISBN (Print)9781632665263
Publication statusPublished - 2014
Event2014 SME Annual Meeting and Exhibit: Leadership in Uncertain Times, SME 2014 - Salt Lake City, UT, United States
Duration: Feb 23 2014Feb 26 2014

Other

Other2014 SME Annual Meeting and Exhibit: Leadership in Uncertain Times, SME 2014
CountryUnited States
CitySalt Lake City, UT
Period2/23/142/26/14

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ASJC Scopus subject areas

  • Geochemistry and Petrology

Cite this

Zhang, J., Zhang, W., An, D., & Feng, Q. (2014). An AFM study of the adsorption of oleic acid on fluorite. In 2014 SME Annual Meeting and Exhibit, SME 2014: Leadership in Uncertain Times (pp. 537-541). Society for Mining, Metallurgy and Exploration.