Phosphate Removal with pH-Responsive Calcium Carbonate Nanoparticles

Hafiz Gadafi Abdul Aziz; Boon Seng Ooi; Abdul Latif Ahmad; Zainal Ahmad; Mohd Azmier Ahmad; Choe Peng Leo

doi:10.1002/ceat.202200087

Phosphate Removal with pH-Responsive Calcium Carbonate Nanoparticles

Hafiz Gadafi Abdul Aziz, Boon Seng Ooi, Abdul Latif Ahmad, Zainal Ahmad, Mohd Azmier Ahmad, Choe Peng Leo^*

^*Corresponding author for this work

Electrical and Computer Engineering

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Abstract

Increasing use and excessive release of phosphate cause eutrophication. In this work, calcium carbonate nanoparticles were produced and modified to remove phosphate from water. The calcium carbonate nanoparticles were synthesized through wet carbonation with polyethylene glycol and sodium dodecyl sulfate added to limit particle size. Iron was incorporated into the calcium carbonate nanoparticles to improve phosphate removal. The BET surface area of CaCO₃ was significantly improved after Fe incorporation. Phosphate removal was enhanced from 50 to 90 % within minutes. More importantly, the adsorption behavior of CaCO₃-Fe was different from that of the pH-responsive CaCO₃ material. Phosphate adsorption was reduced in alkaline solution due to the decreased positive surface charge of CaCO₃-Fe for interaction with phosphate.

Original language	English (US)
Pages (from-to)	1976-1981
Number of pages	6
Journal	Chemical Engineering and Technology
Volume	45
Issue number	11
DOIs	https://doi.org/10.1002/ceat.202200087
State	Published - Nov 2022

Keywords

Adsorption
Calcium carbonate
Iron
Nanoparticles
Phosphate

ASJC Scopus subject areas

General Chemistry
General Chemical Engineering
Industrial and Manufacturing Engineering

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10.1002/ceat.202200087

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title = "Phosphate Removal with pH-Responsive Calcium Carbonate Nanoparticles",

abstract = "Increasing use and excessive release of phosphate cause eutrophication. In this work, calcium carbonate nanoparticles were produced and modified to remove phosphate from water. The calcium carbonate nanoparticles were synthesized through wet carbonation with polyethylene glycol and sodium dodecyl sulfate added to limit particle size. Iron was incorporated into the calcium carbonate nanoparticles to improve phosphate removal. The BET surface area of CaCO3 was significantly improved after Fe incorporation. Phosphate removal was enhanced from 50 to 90 % within minutes. More importantly, the adsorption behavior of CaCO3-Fe was different from that of the pH-responsive CaCO3 material. Phosphate adsorption was reduced in alkaline solution due to the decreased positive surface charge of CaCO3-Fe for interaction with phosphate.",

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AU - Ahmad, Abdul Latif

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AU - Ahmad, Mohd Azmier

AU - Leo, Choe Peng

PY - 2022/11

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N2 - Increasing use and excessive release of phosphate cause eutrophication. In this work, calcium carbonate nanoparticles were produced and modified to remove phosphate from water. The calcium carbonate nanoparticles were synthesized through wet carbonation with polyethylene glycol and sodium dodecyl sulfate added to limit particle size. Iron was incorporated into the calcium carbonate nanoparticles to improve phosphate removal. The BET surface area of CaCO3 was significantly improved after Fe incorporation. Phosphate removal was enhanced from 50 to 90 % within minutes. More importantly, the adsorption behavior of CaCO3-Fe was different from that of the pH-responsive CaCO3 material. Phosphate adsorption was reduced in alkaline solution due to the decreased positive surface charge of CaCO3-Fe for interaction with phosphate.

AB - Increasing use and excessive release of phosphate cause eutrophication. In this work, calcium carbonate nanoparticles were produced and modified to remove phosphate from water. The calcium carbonate nanoparticles were synthesized through wet carbonation with polyethylene glycol and sodium dodecyl sulfate added to limit particle size. Iron was incorporated into the calcium carbonate nanoparticles to improve phosphate removal. The BET surface area of CaCO3 was significantly improved after Fe incorporation. Phosphate removal was enhanced from 50 to 90 % within minutes. More importantly, the adsorption behavior of CaCO3-Fe was different from that of the pH-responsive CaCO3 material. Phosphate adsorption was reduced in alkaline solution due to the decreased positive surface charge of CaCO3-Fe for interaction with phosphate.

KW - Adsorption

KW - Calcium carbonate

KW - Iron

KW - Nanoparticles

KW - Phosphate

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DO - 10.1002/ceat.202200087

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Phosphate Removal with pH-Responsive Calcium Carbonate Nanoparticles

Abstract

Keywords

ASJC Scopus subject areas

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