Foamed phosphate by-product based geopolymers and dye adsorption efficiency

Result code in 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>

Result on the web

<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>

Result language

angličtina

Original language name

Foamed phosphate by-product based geopolymers and dye adsorption efficiency

Original language description

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.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

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

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2024

Confidentiality

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

Name of the periodical

Applied Clay Science

ISSN

0169-1317

e-ISSN

1872-9053

Volume of the periodical

257

Issue of the periodical within the volume

September

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

13

Pages from-to

107446

UT code for WoS article

001256285100001

EID of the result in the Scopus database

2-s2.0-85195165792