Thermochemistry of ion exchange and particle interaction in clay suspensions

1982 ◽  
Vol 60 (4) ◽  
pp. 486-494 ◽  
Author(s):  
Laurier L. Schramm ◽  
Jan C. T. Kwak
Keyword(s):  
Ion Exchange ◽  
Particle Interaction ◽  
Titration Calorimetry ◽  
Self Consistent ◽  
Clay Suspensions ◽  
Exchange Pair

The measurement of enthalpies of ion exchange for a number of homovalent and heterovalent exchange pairs by titration calorimetry is described. A self-consistent addition to previous measurements on such systems is reported. In addition to the enthalpies of ion exchange the heats of tactoid formation and breakdown were observed. The apparent heat of tactoid formation for the Na–Ca exchange pair is estimated to be −4.9 kJ per equivalent of ion exchange.

The propagation of a plasma wave with trapped particles in a weakly inhomogeneous plasma

1992 ◽  
Vol 47 (2) ◽  
pp. 235-248 ◽  
Author(s):  
V. L. Krasovsky
Keyword(s):  
Adiabatic Approximation ◽  
Inhomogeneous Plasma ◽  
Particle Interaction ◽  
Langmuir Wave ◽  
The Self ◽  
Spatial Evolution ◽  
Relativistic Case ◽  
Trapped Particles ◽  
Self Consistent ◽  
Uniform Plasma

The propagation of a Langmuir wave with a small group of trapped particles in a weakly non-uniform plasma along a density gradient is considered. The dynamics of trapped electrons accelerated by the wave is investigated in the adiabatic approximation, including the relativistic case. The set of equations describing the self-consistent spatial evolution of the wave—trapped-particles system is obtained and analysed. It is shown that the possibility exists of wave transmission through a classically forbidden barrier as a consequence of the reversibility of the wave—particle interaction. The conditions of validity of the theory developed are also discussed.

EFFECTS OF pH and ELECTROLYTE CONCENTRATION ON PARTICLE INTERACTION IN THREE HOMOIONIC SODIUM SOIL CLAY SUSPENSIONS

Soil Science ◽  
1991 ◽  
Vol 151 (3) ◽  
pp. 196-207 ◽  
Author(s):  
HUIFANG ZHAO ◽  
PHILIP F. LOW ◽  
JOE M. BRADFORD
Keyword(s):  
Electrolyte Concentration ◽  
Particle Interaction ◽  
Effects Of Ph ◽  
Soil Clay ◽  
Clay Suspensions

Clay chemistry: Investigation of thermodynamics of ion exchange reactions by titration calorimetry

1981 ◽  
Vol 59 (20) ◽  
pp. 2927-2933 ◽  
Author(s):  
Gavin J. Ewin ◽  
Brian P. Erno ◽  
Loren G. Hepler
Keyword(s):  
Ion Exchange ◽  
Cation Exchange ◽  
Convenient Method ◽  
Equilibrium Constants ◽  
Colloidal Suspensions ◽  
Titration Calorimetry ◽  
Chemical Analyses ◽  
Exchange Reactions ◽  
Montmorillonite Clays ◽  
Titration Calorimeter

We have built a titration calorimeter that is suitable for measurements on colloidal suspensions as well as more conventional chemical reactions in solution. This calorimeter has been used for investigation of a number of ion exchange reactions involving kaolinite and montmorillonite clays. Results of these measurements have led to cation exchange capacities, to enthalpies of ion exchange reactions, and also to equilibrium constants for some of these same reactions. These calorimetrically determined cation exchange capacities and equilibrium constants agree well with corresponding quantities obtained by way of conventional methods based on chemical analyses. It has been demonstrated that titration calorimetry is a useful and convenient method for investigation of ion exchange in clays.

scholarly journals Isothermal Titration Calorimetry as a Method for Analyzing Protein Adsorption in Ion Exchange Chromatography

2021 ◽  
Vol 333 ◽  
pp. 15001
Author(s):  
Joao Simoes-Cardoso ◽  
Nanako Hoshino ◽  
Noriko Yoshimoto ◽  
Shuichi Yamamoto
Keyword(s):  
Ion Exchange ◽  
Protein Adsorption ◽  
Isothermal Titration Calorimetry ◽  
Protein Interactions ◽  
Ion Exchange Chromatography ◽  
Exchange Chromatography ◽  
Titration Calorimetry ◽  
Valuable Insight ◽  
Adsorption Enthalpy ◽  
Binding Behavior

Ion exchange chromatography is a widely used method for purification of all types of biomolecules in current biotechnological downstream processes. Knowledge on the binding behavior of proteins provides valuable insight for understanding the molecular mechanisms of protein interactions in a biological context. However, thermodynamic parameters such as enthalpy and entropy changes that characterize protein adsorption are still unknown. Isothermal titration calorimetry applications in biosciences has gained its merit to study binding of soluble molecules, protein inhibition, conformational changes, reaction kinetics, and protein adsorption. However, in the case of protein adsorption, a lot of complications arise since the usual models used to study protein interactions in solution are no longer valid. This work explains a detailed methodology for the obtention of adsorption enthalpy, entropy and Gibbs energy of protein adsorption, by using ITC together with equilibrium adsorption isotherms.

The HAGIS self-consistent nonlinear wave-particle interaction model

1998 ◽  
Vol 111 (1-3) ◽  
pp. 133-149 ◽  
Author(s):  
S.D. Pinches ◽  
L.C. Appel ◽  
J. Candy ◽  
S.E. Sharapov ◽  
H.L. Berk ◽  
...  
Keyword(s):  
Nonlinear Wave ◽  
Particle Interaction ◽  
Interaction Model ◽  
Wave Particle Interaction ◽  
Self Consistent

β-DECAY HALF-LIVES AROUND 78Ni AND 132Sn IN A SELF-CONSISTENT APPROACH

2010 ◽  
Vol 25 (21n23) ◽  
pp. 2012-2013
Author(s):  
FUTOSHI MINATO ◽  
CHUNLIN BAI
Keyword(s):  
Excited States ◽  
Random Phase Approximation ◽  
Random Phase ◽  
Particle Interaction ◽  
Tensor Force ◽  
Q Value ◽  
Β Decay ◽  
Quasiparticle Random Phase Approximation ◽  
Hartree Fock ◽  
Self Consistent

β-decay half-lives around 78 Ni and 132 Sn are studied with proton-neutron Quasiparticle Random Phase Approximation on the basis of Skyrme-Hartree-Fock (SHF) method. We take into account tensor force correlation in calculating the ground and excited states and find it improves the half-life of 132 Sn . However, the Q value is still underestimated. We also discuss that half-lives do not strongly depend on type of particle-particle interaction in isospin T = 0 channel.

APPARENT IRREVERSIBILITY OF ION-EXCHANGE REACTIONS IN CLAY SUSPENSIONS

Soil Science ◽  
1967 ◽  
Vol 104 (2) ◽  
pp. 134-137 ◽  
Author(s):  
ROBERT VAN BLADEL ◽  
HENRI LAUDELOUT
Keyword(s):  
Ion Exchange ◽  
Exchange Reactions ◽  
Clay Suspensions
Sign in / Sign up

Export Citation Format

Share Document