Publication detail

Dissolving behavior and calcium release from fibrous wollastonite in acetic acid solution

PTÁČEK, P. NOSKOVÁ, M. BRANDŠTETR, J. ŠOUKAL, F. OPRAVIL, T.

Original Title

Dissolving behavior and calcium release from fibrous wollastonite in acetic acid solution

Type

journal article in Web of Science

Language

English

Original Abstract

The degradability of fibrous wollastonite (CaSiO3) in an aqueous solution of acetic acid and leaching of Ca2+ ions were investigated in the temperature range from 22 to 50 C. The Inductively Coupled Plasma Atomic Emission Spectroscopy (ICP-OES) was used for the assessment of calcium and other selected cations in the leaching medium. The amount of calcium in the solvent can be significantly enhanced through leaching at higher temperature. Fibrous silica particles are the main by-product of the leaching process. The properties of by-product were examined by thermal analysis (simultaneous TG-DTA-EGA), infrared spectroscopy (FT-IR) and scanning electron microscopy (SEM). The formation of silica layer on the surface of fibrous wollastonite particles is an important factor in the leaching process. Particles were covered by the silica layer and wollastonite core size was continually decreasing during leaching. The shape of resulting silica particles shows no significant changes during this process. Specific surface of the formed fibrous silica particles strongly depends on the leaching temperature.

Keywords

Wollastonite, Calcium silicate, Silica, Acetic acid, Dissolution of silicates, Carbon dioxide sequestration.

Authors

PTÁČEK, P.; NOSKOVÁ, M.; BRANDŠTETR, J.; ŠOUKAL, F.; OPRAVIL, T.

RIV year

2010

Released

20. 1. 2010

Publisher

ELSEVIER

Location

NL

ISBN

0040-6031

Periodical

Thermochimica Acta

Year of study

498

Number

1-2

State

Kingdom of the Netherlands

Pages from

54

Pages to

60

Pages count

7

BibTex

@article{BUT50040,
  author="Petr {Ptáček} and Magdaléna {Křečková} and Jiří {Brandštetr} and František {Šoukal} and Tomáš {Opravil}",
  title="Dissolving behavior and calcium release from fibrous wollastonite in acetic acid solution",
  journal="Thermochimica Acta",
  year="2010",
  volume="498",
  number="1-2",
  pages="54--60",
  issn="0040-6031"
}