Detail publikačního výsledku

The Characterization of Fixation of Ba, Pb, and Cu in Alkali-Activated Fly Ash/Blast Furnace Slag Matrix

KOPLÍK, J.; KALINA, L.; MÁSILKO, J.; ŠOUKAL, F.

Originální název

The Characterization of Fixation of Ba, Pb, and Cu in Alkali-Activated Fly Ash/Blast Furnace Slag Matrix

Anglický název

The Characterization of Fixation of Ba, Pb, and Cu in Alkali-Activated Fly Ash/Blast Furnace Slag Matrix

Druh

Článek WoS

Originální abstrakt

The fixation of heavy metals (Ba, Cu, Pb) in an alkali-activated matrix was investigated. The matrix consisted of fly ash and blast furnace slag (BFS). The mixture of NaOH and Na-silicate was used as alkaline activator. Three analytical techniques were used to describe the fixation of heavy metals—X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM) equipped with energy dispersive X-ray spectroscopy (EDS), and X-ray powder diffraction (XRD). All heavy metals formed insoluble salts after alkaline activation. Ba was fixed as BaSO4, and only this product was crystalline. EDS mapping showed that Ba was cumulated in some regions and formed clusters. Pb was present in the form of Pb(OH)2 and was dispersed throughout the matrix on the edges of BFS grains. Cu was fixed as Cu(OH)2 and also was cumulated in some regions and formed clusters. Cu was present in two different chemical states; apart from Cu(OH)2, a Cu–O bond was also identified.

Anglický abstrakt

The fixation of heavy metals (Ba, Cu, Pb) in an alkali-activated matrix was investigated. The matrix consisted of fly ash and blast furnace slag (BFS). The mixture of NaOH and Na-silicate was used as alkaline activator. Three analytical techniques were used to describe the fixation of heavy metals—X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM) equipped with energy dispersive X-ray spectroscopy (EDS), and X-ray powder diffraction (XRD). All heavy metals formed insoluble salts after alkaline activation. Ba was fixed as BaSO4, and only this product was crystalline. EDS mapping showed that Ba was cumulated in some regions and formed clusters. Pb was present in the form of Pb(OH)2 and was dispersed throughout the matrix on the edges of BFS grains. Cu was fixed as Cu(OH)2 and also was cumulated in some regions and formed clusters. Cu was present in two different chemical states; apart from Cu(OH)2, a Cu–O bond was also identified.

Klíčová slova

fixation; alkali-activated materials; X-ray photoelectron spectroscopy; heavy metals

Klíčová slova v angličtině

fixation; alkali-activated materials; X-ray photoelectron spectroscopy; heavy metals

Autoři

KOPLÍK, J.; KALINA, L.; MÁSILKO, J.; ŠOUKAL, F.

Rok RIV

2017

Vydáno

30.06.2016

Nakladatel

MDPI

Místo

Switzerland

ISSN

1996-1944

Periodikum

Materials

Svazek

7

Číslo

9

Stát

Švýcarská konfederace

Strany od

1

Strany do

9

Strany počet

9

URL

http://www.mdpi.com/1996-1944/9/7/533

Plný text v Digitální knihovně

http://hdl.handle.net/11012/62261

BibTex

@article{BUT126850,
  author="Jan {Koplík} and Lukáš {Kalina} and Jiří {Másilko} and František {Šoukal}",
  title="The Characterization of Fixation of Ba, Pb, and Cu in Alkali-Activated Fly Ash/Blast Furnace Slag Matrix",
  journal="Materials",
  year="2016",
  volume="7",
  number="9",
  pages="1--9",
  doi="10.3390/ma9070533",
  url="http://www.mdpi.com/1996-1944/9/7/533"
}