The Effect of pH, Ionic Strength and the Presence of PbII on the Formation of Calcium Carbonate from Homogenous Alkaline Solutions at Room Temperature

Di Lorenzo, Fulvio; Steiner, Kay; Churakov, Sergey V. (2021). The Effect of pH, Ionic Strength and the Presence of PbII on the Formation of Calcium Carbonate from Homogenous Alkaline Solutions at Room Temperature. Minerals, 11(7), p. 783. MDPI 10.3390/min11070783

[img]
Preview
Text
minerals-11-00783-v2.pdf - Published Version
Available under License Creative Commons: Attribution (CC-BY).

Download (4MB) | Preview

Precipitation of calcium carbonates in aqueous systems is an important factor controlling
various industrial, biological, and geological processes. In the first part of this study, the wellknown
titration approach introduced by Gebauer and coworkers in 2008 s used to obtain reliable
experimental dataset for the deep understanding of CaCO3 nucleation kinetics in supersaturated
solutions over a broad range of pH and ionic strength conditions. In the second part, the effect of
impurities, i.e., 1 mol% of Pb2+, was assessed in the same range of experimental conditions. Divalent
lead has been shown to have an inhibitory effect in all ranges of the conditions tested except for
pH 8 and low ionic strength (≤0.15 mol/L). Future investigations might take advantage of the
methodology and the data provided in this work to investigate the effect of other system variables.
The investigation of all the major variables and the assessment of eventual synergic effects could
improve our ability to predict the formation of CaCO3 in complex natural systems.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Institute of Geological Sciences > Mineralogy
08 Faculty of Science > Institute of Geological Sciences

UniBE Contributor:

Di Lorenzo, Fulvio and Churakov, Sergey

Subjects:

500 Science > 550 Earth sciences & geology

ISSN:

2075-163X

Publisher:

MDPI

Language:

English

Submitter:

Fulvio Di Lorenzo

Date Deposited:

02 Aug 2021 11:50

Last Modified:

08 Aug 2021 03:02

Publisher DOI:

10.3390/min11070783

BORIS DOI:

10.48350/157697

URI:

https://boris.unibe.ch/id/eprint/157697

Actions (login required)

Edit item Edit item
Provide Feedback