Nano Precipitates Formed during the Dissolution of Calcite Incorporated with Cu and Mn

Calcite is often doped with impurity ions that affect its dissolution behavior. In the present investigation, solid solutions of (Ca, Mn)CO3 and (Ca, Cu)CO3 were synthesized by coprecipitation to study their dissolution in an acidic solution (pH = 5) at 25 °C. The solution chemical analysis results...

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Bibliographic Details
Published inMinerals (Basel) Vol. 8; no. 11; p. 484
Main Authors Zhang, Xiaohang, Wu, Shijun, Chen, Fanrong
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.11.2018
Subjects
Adsorption
Angle of reflection
Calcite
Chemical precipitation
Copper
Coprecipitation
Crystal surfaces
Crystals
Dissolution
Dissolving
Electron microscopy
Experiments
heavy metal
Heavy metals
Heterogeneity
Image transmission
Impurities
Laboratories
Manganese
Metals
Nucleation
Precipitates
Ratios
Scanning electron microscopy
secondary mineral
Solid solutions
Surface chemistry
Transmission electron microscopy
X-ray diffraction
United States > US
China
Iceland
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Summary:Calcite is often doped with impurity ions that affect its dissolution behavior. In the present investigation, solid solutions of (Ca, Mn)CO3 and (Ca, Cu)CO3 were synthesized by coprecipitation to study their dissolution in an acidic solution (pH = 5) at 25 °C. The solution chemical analysis results showed that the concentrations of aqueous Cu2+ and Mn2+ first increased and then decreased with the extension of dissolution time. Scanning electron microscope (SEM) and transmission electron microscope (TEM) observations revealed that rhodochrosite (MnCO3) and malachite (Cu2(OH)2CO3) formed during the dissolution. This suggested that the impurities in calcite might impact the dissolution and precipitation of carbonates in the environment.
ISSN:2075-163X
2075-163X
DOI:10.3390/min8110484