Foamed phosphate by-product based geopolymers and dye adsorption efficiency

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985891%3A_____%2F24%3A00586641" target="_blank" >RIV/67985891:_____/24:00586641 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1016/j.clay.2024.107446" target="_blank" >https://doi.org/10.1016/j.clay.2024.107446</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.clay.2024.107446" target="_blank" >10.1016/j.clay.2024.107446</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Foamed phosphate by-product based geopolymers and dye adsorption efficiency

Popis výsledku v původním jazyce

This study aimed to evaluate the efficiency of incorporating Tunisian calcined phosphate sludge into the alkali activated metakaolin geopolymers to use them not only as recycling products for building materials but also as adsorbents in water treatment. Calcined phosphate sludge based geopolymers exhibited compressive strength ranging from 24.8 to 33.8 MPa, with specific surface areas of 16.3–16.9 m2/g. On the other hand, the hydrogen peroxide foamed geopolymers showed an increase in porosity and in specific surface area (close to 25 m2/g). Improved dye adsorptive capacity of geopolymers achieved a 99.9% removal rate of methylene blue within 60 min. Following Langmuir isotherm and pseudo-second-order kinetic, the adsorption of the dye in solution occurred in a monolayer on homogenous surface with chemical interaction between the adsorbate and adsorbent. With the 40% of phosphate sludge foamed geopolymers, higher adsorption capacity was achieved (Qmax = 43 mg/g). This efficiency was attributed to its mesoporous structure (calculated porosity: 43%). On the other hand, pure metakaolin geopolymers showed the weakest adsorption capacity. The reaction between phosphate sludge, unreacted NaOH and hydrogen peroxide seemed to have enhanced porosity. The obtained results demonstrated the efficiency of these mining foamed sludge based geopolymers in dye effluents treatment and immobilization of contained heavy metals.

Název v anglickém jazyce

Foamed phosphate by-product based geopolymers and dye adsorption efficiency

Popis výsledku anglicky

This study aimed to evaluate the efficiency of incorporating Tunisian calcined phosphate sludge into the alkali activated metakaolin geopolymers to use them not only as recycling products for building materials but also as adsorbents in water treatment. Calcined phosphate sludge based geopolymers exhibited compressive strength ranging from 24.8 to 33.8 MPa, with specific surface areas of 16.3–16.9 m2/g. On the other hand, the hydrogen peroxide foamed geopolymers showed an increase in porosity and in specific surface area (close to 25 m2/g). Improved dye adsorptive capacity of geopolymers achieved a 99.9% removal rate of methylene blue within 60 min. Following Langmuir isotherm and pseudo-second-order kinetic, the adsorption of the dye in solution occurred in a monolayer on homogenous surface with chemical interaction between the adsorbate and adsorbent. With the 40% of phosphate sludge foamed geopolymers, higher adsorption capacity was achieved (Qmax = 43 mg/g). This efficiency was attributed to its mesoporous structure (calculated porosity: 43%). On the other hand, pure metakaolin geopolymers showed the weakest adsorption capacity. The reaction between phosphate sludge, unreacted NaOH and hydrogen peroxide seemed to have enhanced porosity. The obtained results demonstrated the efficiency of these mining foamed sludge based geopolymers in dye effluents treatment and immobilization of contained heavy metals.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20505 - Composites (including laminates, reinforced plastics, cermets, combined natural and synthetic fibre fabrics; filled composites)

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2024

Kód důvěrnosti údajů

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

Název periodika

Applied Clay Science

ISSN

0169-1317

e-ISSN

1872-9053

Svazek periodika

257

Číslo periodika v rámci svazku

September

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

13

Strana od-do

107446

Kód UT WoS článku

001256285100001

EID výsledku v databázi Scopus

2-s2.0-85195165792