Growth of gypsum II. Incorporation of cadmium

G. J. Witkamp; G. M. van Rosmalen

doi:10.1016/0022-0248(91)90356-A

Growth of gypsum II. Incorporation of cadmium

G. J. Witkamp^*, G. M. van Rosmalen

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

18 Scopus citations

Abstract

The cadmium uptake in gypsum has been investigated using the techniques of constant composition, simple precipitation and continuous crystallization. The partition coefficient D increases from (4-8)×10^-3 at low supersaturations σ to 5x10^-3 at a σ equal to 1.5. D is slightly higher in solutions with a higher electrolyte (NaNO₃) concentration, partly due to a higher activity coefficient of Cd²⁺. A higher temperature also results in a higher uptake. From adsorption experiments it follows that the affinity of Cd²⁺ to SO^2-₄ at the crystal surface is not larger than for Cd²⁺ to SO^2-₄ in the solution.

Original language	English (US)
Pages (from-to)	89-98
Number of pages	10
Journal	Journal of Crystal Growth
Volume	108
Issue number	1-2
DOIs	https://doi.org/10.1016/0022-0248(91)90356-A
State	Published - Jan 2 1991
Externally published	Yes

ASJC Scopus subject areas

Condensed Matter Physics
Inorganic Chemistry
Materials Chemistry

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abstract = "The cadmium uptake in gypsum has been investigated using the techniques of constant composition, simple precipitation and continuous crystallization. The partition coefficient D increases from (4-8)×10-3 at low supersaturations σ to 5x10-3 at a σ equal to 1.5. D is slightly higher in solutions with a higher electrolyte (NaNO3) concentration, partly due to a higher activity coefficient of Cd2+. A higher temperature also results in a higher uptake. From adsorption experiments it follows that the affinity of Cd2+ to SO2-4 at the crystal surface is not larger than for Cd2+ to SO2-4 in the solution.",

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N2 - The cadmium uptake in gypsum has been investigated using the techniques of constant composition, simple precipitation and continuous crystallization. The partition coefficient D increases from (4-8)×10-3 at low supersaturations σ to 5x10-3 at a σ equal to 1.5. D is slightly higher in solutions with a higher electrolyte (NaNO3) concentration, partly due to a higher activity coefficient of Cd2+. A higher temperature also results in a higher uptake. From adsorption experiments it follows that the affinity of Cd2+ to SO2-4 at the crystal surface is not larger than for Cd2+ to SO2-4 in the solution.

AB - The cadmium uptake in gypsum has been investigated using the techniques of constant composition, simple precipitation and continuous crystallization. The partition coefficient D increases from (4-8)×10-3 at low supersaturations σ to 5x10-3 at a σ equal to 1.5. D is slightly higher in solutions with a higher electrolyte (NaNO3) concentration, partly due to a higher activity coefficient of Cd2+. A higher temperature also results in a higher uptake. From adsorption experiments it follows that the affinity of Cd2+ to SO2-4 at the crystal surface is not larger than for Cd2+ to SO2-4 in the solution.

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Growth of gypsum II. Incorporation of cadmium

Abstract

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