Hydrogen ion adsorption at the rutile-water interface to 250°C

Details Hydrogen ion adsorption at the rutile-water interface to 250°C Hydrogen ion adsorption at the rutile-water interface to 250°C

Dec 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994gecoa..58.5627m&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 58, Issue 24, pp.5627-5632

Other

5

Scientific paper

A stirred hydrogen-electrode concentration cell was used to follow hydrogen ion adsorption by the rutile surface in NaCl media (0.01-1.0 m) between 25 and 250°C. The pH of zero net surface charge (pHzpc) decreases to 200°C and then appears to increase. Away from the pHzpc, negative surface charge is screened more efficiently by Na + ions than positive charge is by Cl - ions and this effect increases with temperature. Thus, Na + moves closer to the rutile surface with increasing temperature relative to Cl - . Finally, [ ] is approximately constant (- 1.1 ± 0.2) for this rutile sample to 250°C and is also equivalent to the equilibrium constant for an isocoulombic form of the "IpKa" surface ionization model. Thus, the constancy of [ ] may also be useful for extrapolating rutile pHzpc values to higher temperatures and pressures than those studied here, and may also apply to many other oxide surfaces as well.

Affiliated with

Also associated with

No associations

Rating

Hydrogen ion adsorption at the rutile-water interface to 250°C does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Hydrogen ion adsorption at the rutile-water interface to 250°C, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hydrogen ion adsorption at the rutile-water interface to 250°C will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1408391