Detail publikace

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

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

Originální název

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

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.

Klíčová slova

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

Autoři

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

Rok RIV

2010

Vydáno

20. 1. 2010

Nakladatel

ELSEVIER

Místo

ISSN

0040-6031

Periodikum

Thermochimica Acta

Ročník

498

Číslo

1-2

Stát

Nizozemsko

Strany od

Strany do

Strany počet

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"
}