Study of Phosphate Retention on Model of Amorphous Blast Furnace Slags

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27350%2F17%3A10236007" target="_blank" >RIV/61989100:27350/17:10236007 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61989100:27360/17:10236007

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Study of Phosphate Retention on Model of Amorphous Blast Furnace Slags

Popis výsledku v původním jazyce

The sol-gel method was chosen for the preparation of model amorphous blast furnace slag (SG). The amorphous structure of the prepared slag was verified by X-ray diffraction and the specific surface was determined using SBET. Model slag was tested as a sorbent of phosphates from water solutions. The obtained results were compared with the results of the real blast furnace slag of the same composition (BFS). It was found that phosphate retention was accomplished by the same mechanisms as in the case of BFS. The higher value of theoretical adsorption capacity of the model slag, which was 44.05 mg P/g, was caused by a different method of preparation. It turned out that the sol-gel method was suitable for the efficient preparation of model slags of desired composition. The existence of the hydroxyapatite phase (HAp) in the adsorbent product was proven by the FTIR analysis. The main retention mechanism is probably the precipitation of Ca-phosphates. The sections of the phase diagram of the CaO-Al2O3-SiO2 system were prepared by the sol-gel method in order to assess the influence of acid-base properties on the adsorption capacity of slags. Excellent linear dependence of the theoretical adsorption capacity of phosphorus on the optical basicity of model slags was found that enabled an estimation of their sorption capacity.

Název v anglickém jazyce

Study of Phosphate Retention on Model of Amorphous Blast Furnace Slags

Popis výsledku anglicky

The sol-gel method was chosen for the preparation of model amorphous blast furnace slag (SG). The amorphous structure of the prepared slag was verified by X-ray diffraction and the specific surface was determined using SBET. Model slag was tested as a sorbent of phosphates from water solutions. The obtained results were compared with the results of the real blast furnace slag of the same composition (BFS). It was found that phosphate retention was accomplished by the same mechanisms as in the case of BFS. The higher value of theoretical adsorption capacity of the model slag, which was 44.05 mg P/g, was caused by a different method of preparation. It turned out that the sol-gel method was suitable for the efficient preparation of model slags of desired composition. The existence of the hydroxyapatite phase (HAp) in the adsorbent product was proven by the FTIR analysis. The main retention mechanism is probably the precipitation of Ca-phosphates. The sections of the phase diagram of the CaO-Al2O3-SiO2 system were prepared by the sol-gel method in order to assess the influence of acid-base properties on the adsorption capacity of slags. Excellent linear dependence of the theoretical adsorption capacity of phosphorus on the optical basicity of model slags was found that enabled an estimation of their sorption capacity.

Druh

J_ost - Ostatní články v recenzovaných periodicích

CEP obor

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OECD FORD obor

10402 - Inorganic and nuclear chemistry

Projekt

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Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2017

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Hutnické listy

ISSN

0018-8069

e-ISSN

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Svazek periodika

LXX

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

5

Strana od-do

28-32

Kód UT WoS článku

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EID výsledku v databázi Scopus

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