Publication detail

The leachability of heavy metals from alkali-activated fly ash and blast furnace slag matrices

KOPLÍK, J. SMOLKOVÁ, M. TKACZ, J.

Original Title

The leachability of heavy metals from alkali-activated fly ash and blast furnace slag matrices

English Title

The leachability of heavy metals from alkali-activated fly ash and blast furnace slag matrices

Type

conference paper

Language

en

Original Abstract

The ability of alkali-activated materials (AAMs) to fix and immobilize heavy metals was investigated. Two raw materials were used to prepare alkali-activated matrices – high-temperature fly ash and blast furnace slag (BFS). NaOH served as an alkaline activator. Two heavy metals (Mn, Ni) were added in various amounts into the matrices to find out the influence of dosage of heavy metal on the leachability and mechanical properties of the matrices. Leachability was measured as concentration of heavy metals in leachates (ČSN EN 12457-4) by inductively coupled plasma/optical emission spectrometry (ICP/OES). Structure of prepared matrices was characterized by scanning electron microscopy (SEM). Increasing of dosage of heavy metals added to the matrices led to decrease of mechanical properties. The leaching tests showed, that both matrices can immobilize Mn and Ni in dosages of added heavy metal 0.1 – 2,5%. Higher dosages caused deterioration of the matrices and increasing of leachability of fly ash matrices. After alkali activation both heavy metals were transformed into the form of insoluble salts.

English abstract

The ability of alkali-activated materials (AAMs) to fix and immobilize heavy metals was investigated. Two raw materials were used to prepare alkali-activated matrices – high-temperature fly ash and blast furnace slag (BFS). NaOH served as an alkaline activator. Two heavy metals (Mn, Ni) were added in various amounts into the matrices to find out the influence of dosage of heavy metal on the leachability and mechanical properties of the matrices. Leachability was measured as concentration of heavy metals in leachates (ČSN EN 12457-4) by inductively coupled plasma/optical emission spectrometry (ICP/OES). Structure of prepared matrices was characterized by scanning electron microscopy (SEM). Increasing of dosage of heavy metals added to the matrices led to decrease of mechanical properties. The leaching tests showed, that both matrices can immobilize Mn and Ni in dosages of added heavy metal 0.1 – 2,5%. Higher dosages caused deterioration of the matrices and increasing of leachability of fly ash matrices. After alkali activation both heavy metals were transformed into the form of insoluble salts.

Keywords

Fly ash, Blast furnace slag, Alkaline activation, Leachability

Released

01.04.2016

Publisher

Trans Tech Publications Inc.

Location

Switzerland

ISBN

0255-5476

Periodical

Materials Science Forum

Year of study

851

Number

3

State

CH

Pages from

141

Pages to

146

Pages count

6

URL

Documents

BibTex


@inproceedings{BUT123495,
  author="Jan {Koplík} and Miroslava {Smolková} and Jakub {Tkacz}",
  title="The leachability of heavy metals from alkali-activated fly ash and blast furnace slag matrices",
  annote="The ability of alkali-activated materials (AAMs) to fix and immobilize heavy metals was investigated.  Two raw materials were used to prepare alkali-activated matrices – high-temperature fly ash and blast furnace slag (BFS). NaOH served as an alkaline activator. Two heavy metals (Mn, Ni) were added in various amounts into the matrices to find out the influence of dosage of heavy metal on the leachability and mechanical properties of the matrices. Leachability was measured as concentration of heavy metals in leachates (ČSN EN 12457-4) by inductively coupled plasma/optical emission spectrometry (ICP/OES). Structure of prepared matrices was characterized by scanning electron microscopy (SEM). Increasing of dosage of heavy metals added to the matrices led to decrease of mechanical properties. The leaching tests showed, that both matrices can immobilize Mn and Ni in dosages of added heavy metal 0.1 – 2,5%. Higher dosages caused deterioration of the matrices and increasing of leachability of fly ash matrices. After alkali activation both heavy metals were transformed into the form of insoluble salts.",
  address="Trans Tech Publications Inc.",
  booktitle="6th Conference on Chemistry and Life, 2015",
  chapter="123495",
  howpublished="online",
  institution="Trans Tech Publications Inc.",
  number="3",
  year="2016",
  month="april",
  pages="141--146",
  publisher="Trans Tech Publications Inc.",
  type="conference paper"
}