Publication detail

Fixation of heavy metals in alkali-activated alumino-silicate matrices

KOPLÍK, J. KALINA, L.

Original Title

Fixation of heavy metals in alkali-activated alumino-silicate matrices

English Title

Fixation of heavy metals in alkali-activated alumino-silicate matrices

Type

abstract

Language

en

Original Abstract

The ability of alkali-activated alumino silicates to immobilize heavy metals in their structure is known in general. This study examines the way of fixation of heavy metals (Ba, Cu, Pb) in alkali activated matrix. The matrix was prepared by alkaline activation (KOH, K-silicate) of mixture of fly ash and blast furnace slag (BFS). The microstructure was examined by scanning electron microscopy (SEM) equipped with energy dispersive X-ray spectroscopy (EDS). The chemical state of fixed heavy metals was analyzed by X-ray photoelectron spectroscopy (XPS). After alkaline activation all used metals formed its insoluble salts. According to EDS mapping and SEM Ba and Cu are rather cumulated in some regions, than be dispersed throughout the matrix. On the contrary Pb is dispersed throughout the matrix.

English abstract

The ability of alkali-activated alumino silicates to immobilize heavy metals in their structure is known in general. This study examines the way of fixation of heavy metals (Ba, Cu, Pb) in alkali activated matrix. The matrix was prepared by alkaline activation (KOH, K-silicate) of mixture of fly ash and blast furnace slag (BFS). The microstructure was examined by scanning electron microscopy (SEM) equipped with energy dispersive X-ray spectroscopy (EDS). The chemical state of fixed heavy metals was analyzed by X-ray photoelectron spectroscopy (XPS). After alkaline activation all used metals formed its insoluble salts. According to EDS mapping and SEM Ba and Cu are rather cumulated in some regions, than be dispersed throughout the matrix. On the contrary Pb is dispersed throughout the matrix.

Keywords

Immobilization, Heavy metal, Alumino silicate matrix

Released

17.06.2014

Location

Brno

ISBN

978-80-214-4867-4

Book

NON TRADITIONAL CEMENT & CONCRETE V

Pages from

109

Pages to

110

Pages count

2

Documents

BibTex


@misc{BUT108995,
  author="Jan {Koplík} and Lukáš {Kalina}",
  title="Fixation of heavy metals in alkali-activated alumino-silicate matrices",
  annote="The ability of alkali-activated alumino silicates to immobilize heavy metals in their structure is known in general.  This study examines the way of fixation of heavy metals (Ba, Cu, Pb) in alkali activated matrix. The matrix was prepared by alkaline activation (KOH, K-silicate) of mixture of fly ash and blast furnace slag (BFS). The microstructure was examined by scanning electron microscopy (SEM) equipped with energy dispersive X-ray spectroscopy (EDS). The chemical state of fixed heavy metals was analyzed by X-ray photoelectron spectroscopy (XPS). After alkaline activation all used metals formed its insoluble salts. According to EDS mapping and SEM Ba and Cu are rather cumulated in some regions, than be dispersed throughout the matrix. On the contrary Pb is dispersed throughout the matrix.",
  booktitle="NON TRADITIONAL CEMENT & CONCRETE V",
  chapter="108995",
  howpublished="print",
  year="2014",
  month="june",
  pages="109--110",
  type="abstract"
}