Leachability of the metakaolinite-rich materials in different alkaline

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62243136%3A_____%2F19%3AN0000026" target="_blank" >RIV/62243136:_____/19:N0000026 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S2352492819305847?dgcid=author" target="_blank" >https://www.sciencedirect.com/science/article/pii/S2352492819305847?dgcid=author</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.mtcomm.2019.100669" target="_blank" >10.1016/j.mtcomm.2019.100669</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Leachability of the metakaolinite-rich materials in different alkaline

Popis výsledku v původním jazyce

The leaching behaviour of three metakaolinite-rich materials prepared from granulated kaolin and two kaolinitic claystones in alkaline solutions at room temperature was investigated with the aid of centrifugal separation of clear supernatant from the reaction mixture. Two types of alkaline solutions (sodium or potassium hydroxide and sodium or potassium silicate solution) with two solid/ liquid weight ratios (0.04 and 0.65) were tested in a large time interval (5?min to 336?h). The metakaolinite-rich materials were characterized by XRD, XRF, BET and MIP. Al and Si concentrations in supernatant were analysed using an inductively coupled plasma optical emission spectrometer (ICP-OES), the solid phases were identified by X-ray diffraction. All three metakaolinite-rich input materials are leachable in the applied alkaline solutions, almost independent of the character of the calcined kaolinitic materials, including both less expensive claystones. The concentrations of dissolved Al and Si were mostly higher in an alkaline solution with sodium than with potassium cations. Alkali silicate solutions showed a significantly higher extent of leaching in comparison with alkaline hydroxide solutions. The solids remaining after the leaching in hydroxide solutions showed a presence of zeolites and carbonates, which, was not the case with alkaline silicate solutions.

Název v anglickém jazyce

Leachability of the metakaolinite-rich materials in different alkaline

Popis výsledku anglicky

The leaching behaviour of three metakaolinite-rich materials prepared from granulated kaolin and two kaolinitic claystones in alkaline solutions at room temperature was investigated with the aid of centrifugal separation of clear supernatant from the reaction mixture. Two types of alkaline solutions (sodium or potassium hydroxide and sodium or potassium silicate solution) with two solid/ liquid weight ratios (0.04 and 0.65) were tested in a large time interval (5?min to 336?h). The metakaolinite-rich materials were characterized by XRD, XRF, BET and MIP. Al and Si concentrations in supernatant were analysed using an inductively coupled plasma optical emission spectrometer (ICP-OES), the solid phases were identified by X-ray diffraction. All three metakaolinite-rich input materials are leachable in the applied alkaline solutions, almost independent of the character of the calcined kaolinitic materials, including both less expensive claystones. The concentrations of dissolved Al and Si were mostly higher in an alkaline solution with sodium than with potassium cations. Alkali silicate solutions showed a significantly higher extent of leaching in comparison with alkaline hydroxide solutions. The solids remaining after the leaching in hydroxide solutions showed a presence of zeolites and carbonates, which, was not the case with alkaline silicate solutions.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20402 - Chemical process engineering

Projekt

<a href="/cs/project/LO1606" target="_blank" >LO1606: Rozvoj Centra UniCRE</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2019

Kód důvěrnosti údajů

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

Název periodika

Materials Today Communications

ISSN

2352-4928

e-ISSN

—

Svazek periodika

—

Číslo periodika v rámci svazku

21

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

9

Strana od-do

1-9

Kód UT WoS článku

000504839500108

EID výsledku v databázi Scopus

2-s2.0-85072839072