Acid-base surface chemistry and sorption of some lanthanides on K + -saturated Marblehead illite: I. results of an experimental investigation

Details Acid-base surface chemistry and sorption of some lanthanides on K + -saturated Marblehead illite: I. results of an experimental investigation Acid-base surface chemistry and sorption of some lanthanides on K + -saturated Marblehead illite: I. results of an experimental investigation

Jan 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000gecoa..64..185s&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 64, Issue 2, pp.185-194

Physics

4

Scientific paper

The surface reactivity and sorption of Nd and Eu onto K + -saturated, Marblehead illite has been investigated in 0.01, 0.1, and 1.0 M KCl solutions at 25°C; the potentiometric titrations were conducted using back-titration techniques. Batch experimental protocols were used in both series of studies. The ionic strength-dependent, proton surface charge density ( H ) varies from -1500 to -1700 mC/m 2 in 1.0 M KCl solutions and from -1800 to -2200 mC/m 2 in 0.01 and 0.1 M KCl solutions. An isoelectric point was not defined by the H vs. pH curves, which reflects the multi-phase nature of natural illitic materials. The functional dependence of REE binding constants (log K e ) on surface coverage (log REE ) indicates the existence of a multiplicity of energetically distinct surface types. These surface site types include amphoteric silanol and aluminol sites, basal planar surfaces, and "frayed edges"; the frayed edges are observed only in low ionic strength solutions (I 0.1 M KCl).

Affiliated with

Also associated with

No associations

Rating

Acid-base surface chemistry and sorption of some lanthanides on K + -saturated Marblehead illite: I. results of an experimental investigation 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 Acid-base surface chemistry and sorption of some lanthanides on K + -saturated Marblehead illite: I. results of an experimental investigation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Acid-base surface chemistry and sorption of some lanthanides on K + -saturated Marblehead illite: I. results of an experimental investigation will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-806056