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

Materials ◽  
2016 ◽  
Vol 9 (7) ◽  
pp. 533 ◽  
Author(s):  
Jan Koplík ◽  
Lukáš Kalina ◽  
Jiří Másilko ◽  
František Šoukal
Keyword(s):  
Blast Furnace ◽  
Fly Ash ◽  
Blast Furnace Slag ◽  
Furnace Slag ◽  
Alkali Activated

Immobilization of Sr2+, Bi3+ and Zn2+ in Alkali-Activated Materials Based on Blast Furnace Slag and Fly Ash

2018 ◽  
Vol 761 ◽  
pp. 15-18 ◽  
Author(s):  
Jan Koplík ◽  
Tomáš Solný ◽  
Lukáš Kalina ◽  
Jiří Másilko
Keyword(s):  
Blast Furnace ◽  
Fly Ash ◽  
Blast Furnace Slag ◽  
Alkali Activation ◽  
Alkaline Activator ◽  
Insoluble Compounds ◽  
Furnace Slag ◽  
Alkali Activated ◽  
State Of Metals

It is well known, that alkali-activated materials (AAMs) are suitable for immobilization of heavy metals and other hazardous materials. This study is focused on the characterization of inhibition of three metals – Sr2+, Bi3+and Zn2+in alkali-activated matrices. Two type of matrices were prepared – alkali-activated blast furnace slag (BFS) and alkali-activated fly ash (FA). Sodium water glass was used as alkaline activator. The ability of these matrices to fix the metals were proved by leaching tests. Compressive strength was measured to characterize mechanical properties of the matrices. Scanning electron microscopy (SEM) equipped with energy dispersive X-ray spectroscopy (EDS) was used to examine distribution and chemical state of metals within the matrices. The observed metals mainly formed the insoluble compounds after alkali activation.

Physical–mechanical and microstructural properties of alkali-activated fly ash–blast furnace slag blends

2015 ◽  
Vol 41 (1) ◽  
pp. 1421-1435 ◽  
Author(s):  
N. Marjanović ◽  
M. Komljenović ◽  
Z. Baščarević ◽  
V. Nikolić ◽  
R. Petrović
Keyword(s):  
Blast Furnace ◽  
Fly Ash ◽  
Blast Furnace Slag ◽  
Microstructural Properties ◽  
Mechanical And Microstructural Properties ◽  
Furnace Slag ◽  
Alkali Activated

External sulfate attack on alkali-activated fly ash-blast furnace slag composite

2017 ◽  
Vol 157 ◽  
pp. 737-747 ◽  
Author(s):  
N. Džunuzović ◽  
M. Komljenović ◽  
V. Nikolić ◽  
T. Ivanović
Keyword(s):  
Blast Furnace ◽  
Fly Ash ◽  
Blast Furnace Slag ◽  
Sulfate Attack ◽  
Furnace Slag ◽  
Alkali Activated

The Leachability of Heavy Metals from Alkali-Activated Fly Ash and Blast Furnace Slag Matrices

2016 ◽  
Vol 851 ◽  
pp. 141-146
Author(s):  
Jan Koplík ◽  
Miroslava Smolková ◽  
Jakub Tkacz
Keyword(s):  
Mechanical Properties ◽  
Heavy Metals ◽  
Blast Furnace ◽  
Fly Ash ◽  
Blast Furnace Slag ◽  
Inductively Coupled Plasma ◽  
Emission Spectrometry ◽  
Alkali Activation ◽  
Furnace Slag ◽  
Alkali Activated

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 different amounts to find out the influence of dosage of heavy metal on the mechanical properties of the matrices and the leachability. 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 addition of heavy metals led to decrease of mechanical properties of matrices. The leaching tests showed, that both matrices can immobilize Mn and Ni in dosages of 0.1 – 2,5%. Higher dosages caused deterioration of the matrices and increased the leachability. After alkali activation both heavy metals were transformed into the form of insoluble salts.

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