Work

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

Year: 2018

Type: article

Abstract: 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.

Source: Minerals

DOI: 10.3390/min8110484

Authors: Xiaohang Zhang, Shijun Wu, Fanrong Chen

Institutions: Chinese Academy of Sciences, Guangzhou Institute of Geochemistry, University of Chinese Academy of Sciences

Language: English

Topic: CO2 Sequestration and Geologic Interactions

Subfield: Environmental Engineering

Field: Environmental Science

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,896

Funders: National Natural Science Foundation of China, Natural Science Foundation of Guangdong Province