Wednesday 4 November 2009

Graduate Seminar

"Advances in Mine Wastewater Treatment"

D. Jack Adams
Research Professor
Metallurgical Engineering
University of Utah

3:20 p.m.
207 WBB (135 South 1460 East)
Free admission. The public is welcome.

_{^{Update 23Oct09}}

Wednesday 11 November 2009

Graduate Seminar

"States of Adsorbed Dodecyl Amine and Water at a Silica Surface as Revealed by Vibrational Spectroscopy"

Xuming Wang
Research Asst. Prof.
Metallurgical Engineering
University of Utah

3:20 p.m.
207 WBB (135 South 1460 East)
University of Utah
Salt Lake City, Utah
Free admission. The public is welcome.

Synopsis

The state of adsorbed dodecylamine (DDA) at a silica surface varies significantly at different pH values, as shown by vibrational spectroscopy (SFVS, FTIR), contact angle measurements, and MD simulations. At pH 6.30, there is no pronounced adsorption of DDA cations, and the surface is hydrophilic. The results at pH 10.0 suggest that amine is adsorbed as a well-organized monolayer, the hemimicelle structure, under which conditions dehydration occurs, and the silica surface becomes hydrophobic. Continued adsorption of DDA neutral molecules occurs at pH 12.3, with the amine surface state changing from a monolayer to a bilayer, or a micellar surface state. At this high pH extensive surface hydration is evident, and the silica surface becomes hydrophilic.

_{^{Update 04Nov09}}

Friday, November 13, 2009

Thesis Defense

"Pretreatment of Copper Ore Prior to Heap Leaching"

Phanindra Kodali
Candidate for the Degree of Master of Science in Metallurgical Engineering

3:00 p.m.
Room 802 William C. Browning Building
Free admission. The public is welcome.

_{^{Update 04Nov09}}

Seminars are held weekly during the academic year, August through April.
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