Mimicking bone–metal exchanges with synthetic nanocrystalline apatites

A chemical system accounting for metallic cation exchange between blood plasma and bone mineral has been developed. After a first step ensuring Ca and P equilibria, the model has been employed to characterize U(vi) interaction with bone mineral.

Download Full-text

Degree of saturation of blood plasma in vertebrates with octocalcium phosphate

Zeitschrift für Naturforschung C ◽

10.1515/znc-1988-1-215 ◽

1988 ◽

Vol 43 (1-2) ◽

pp. 74-76 ◽

Cited By ~ 7

Author(s):

F. C. M. Driessens ◽

R. M. H. Verbeeck ◽

J. W. E. van Dijk ◽

J. M. P. M. Borggreven

Keyword(s):

Bone Turnover ◽

Blood Plasma ◽

Bone Mineral ◽

Body Fluids ◽

Degree Of Saturation ◽

Phosphate Homeostasis ◽

New Formation

In previous papers it has been shown that octocalcium phospate OCP occurs in bone mineral of vertebrates. Although this compound is not stable, there is a continuous new-formation of OCP due to bone turnover. Literature data of the calcium and phosphate concentrations in the blood plasma of vertebrates were collected and the degree of saturation with OCP was calculated. The results show that blood plasma of vertebrates is almost saturated with OCP. This fact indicates that OCP is the solubility controlling phase in the mineral of vertebrates. Further it verifies the expectation based on physicochemical theory that the interaction between body fluids and bone mineral is important in the calcium and phosphate homeostasis

Download Full-text

Fractionation of rare earth elements within bone mineral: A natural cation exchange system

Palaeogeography Palaeoclimatology Palaeoecology ◽

10.1016/j.palaeo.2011.01.002 ◽

2011 ◽

Vol 310 (1-2) ◽

pp. 124-132 ◽

Cited By ~ 35

Author(s):

Clive N. Trueman ◽

László Kocsis ◽

Martin R. Palmer ◽

Chris Dewdney

Keyword(s):

Rare Earth ◽

Rare Earth Elements ◽

Cation Exchange ◽

Bone Mineral ◽

Exchange System

Download Full-text

Cation-exchange method of determining the state of magnesium, calcium, and strontium in blood plasma

Bulletin of Experimental Biology and Medicine ◽

10.1007/bf00797592 ◽

1976 ◽

Vol 81 (4) ◽

pp. 639-641

Author(s):

I. V. Kolosov ◽

I. S. Meisner

Keyword(s):

Blood Plasma ◽

Cation Exchange ◽

The State ◽

Exchange Method ◽

In Blood Plasma

Download Full-text

Purification of Wet-Process Phosphoric Acid via Donnan Dialysis with a Perfluorinated Sulfonic Acid Cation-Exchange Membrane

Membranes ◽

10.3390/membranes11040298 ◽

2021 ◽

Vol 11 (4) ◽

pp. 298

Author(s):

Qin Zhong ◽

Tao Luo ◽

Zhengjuan Yan ◽

Lin Yang ◽

Zhiye Zhang ◽

...

Keyword(s):

Phosphoric Acid ◽

Cation Exchange ◽

Sulfonic Acid ◽

Wet Process ◽

Donnan Dialysis ◽

Metallic Cation ◽

Acid Cation ◽

Metallic Cations ◽

Perfluorinated Sulfonic Acid ◽

Exchange Membrane

This work reports the application of an electromembrane process, Donnan dialysis (DD), for the purification of so-called wet-process phosphoric acid (WPA). Nitric acid is used as the stripping solution to remove metallic cations (mostly Fe3+, Al3+, and Mg2+) that are harmful to the further processing of WPA. The paper first presents a set of experimental data on the measurements of the metallic cation fluxes through a perfluorinated sulfonic acid cation-exchange membrane. Not only WPA, but also synthetic phosphoric acid solutions with mixed metallic cations (MPA) and with a single metallic cation (SPA) were studied. This confrontation confirms (1) that the order of metallic cations fluxes is Mg2+ > Al3+ > Fe3+; (2) that, compared with MPA, the purification effect of WPA causes only negligible change; (3) that, by comparing the DD processes with SPA and MPA solutions, the reason for the low transmembrane fluxes of Fe3+ and Al3+ could be explained by the large ionic charge and large hydrated ion radius. Furthermore, by analyzing the ion composition of membranes equilibrated in SPA solutions, we conclude that the forms of cations in the membrane are most likely Fe3+, Al3+, and Mg2+.

Download Full-text