Fluorine soil stabilization using hydroxyapatite synthesized from minerals wastes
The objective of this study was to present a new approach to mineral waste valorization, based on the synthesis of hydroxyapatite (HAP) as an efficient and cost-effective adsorbent for the stabilization of fluorides (F-) in soil. Hydroxyapatites were synthesized from the reaction of potassium dihydr...
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| Format: | Article |
| Language: | English |
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Elsevier
2023-11-01
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| Series: | Arabian Journal of Chemistry |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1878535223007232 |
| _version_ | 1797657855029936128 |
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| author | Bader Bouzar Mahfoud Benzerzour Nor-Edine Abriak |
| author_facet | Bader Bouzar Mahfoud Benzerzour Nor-Edine Abriak |
| author_sort | Bader Bouzar |
| collection | DOAJ |
| description | The objective of this study was to present a new approach to mineral waste valorization, based on the synthesis of hydroxyapatite (HAP) as an efficient and cost-effective adsorbent for the stabilization of fluorides (F-) in soil. Hydroxyapatites were synthesized from the reaction of potassium dihydrogen phosphate (KH2PO4) and waste paper fly ash (WPFA), fine limestone clay (FLC) and limestone filler (LF) rich in calcite. X-ray diffraction characterization results showed that for HAPFLC and HAPFL the main resulting phases were brushite (CaHPO5·2H2O) and for HAPWPFA was hydroxyapatite (Ca5(PO4)3OH). The FTIR spectra showed similar patterns to natural HAP containing orthophosphate groups (PO43-), hydroxylated groups (OH–) and both types A/B of carbonate apatite. SEM-EDS analysis of the individual HAP revealed a morphology consistent with phosphocalcic hydroxyapatite crystals. EDS analysis revealed a Ca/P atomic ratio equal to 1.92, 1.85 and 1.7 for HAPFLC, HAPLF and HAPWPFA respectively, which is similar to the stoichiometry of hydroxyapatites (Ca/P = 1.67). The use of HAP as an amendment to stabilize fluorides (F-) in the soil was demonstrated to be effective, the addition of 1% of the different HAP allowed the decrease of the concentration of F in the raw soil (73.8 mg/kg) to concentrations below the IWSI threshold (10 mg/kg), to 4.68 mg/kg, 5.63 mg/kg, and 0.8 mg/kg for HAPFLC, HAPFL and HAPWPFA respectively. Fluoride (F) sequential extraction results showed that it was extracted from the residual fraction (Fraction 4) after soil treatment, and was generally trapped on the hydroxyapatites (Ca5(PO4)3(OH)) by anion exchange with the hydroxides (OH–) to form the stable and insoluble fluorapatite ((Ca5(PO4)3F). |
| first_indexed | 2024-03-11T17:50:37Z |
| format | Article |
| id | doaj.art-0989e981ab8a4d6684ede973cb08d307 |
| institution | Directory Open Access Journal |
| issn | 1878-5352 |
| language | English |
| last_indexed | 2024-03-11T17:50:37Z |
| publishDate | 2023-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Arabian Journal of Chemistry |
| spelling | doaj.art-0989e981ab8a4d6684ede973cb08d3072023-10-18T04:30:45ZengElsevierArabian Journal of Chemistry1878-53522023-11-011611105261Fluorine soil stabilization using hydroxyapatite synthesized from minerals wastesBader Bouzar0Mahfoud Benzerzour1Nor-Edine Abriak2Corresponding author at: MT Nord Europe, Institut Mines-Télécom, Centre for Materials and Processes, Environnement, F-59000 Lille, France.; MT Nord Europe, Institut Mines-Télécom, Centre for Materials and Processes, Environnement, F-59000 Lille, France; Univ. Lille, Univ., ULR 4515 – LGCgE, Laboratoire de Génie Civil et géo-Environnement, F-59000 Lille, FranceMT Nord Europe, Institut Mines-Télécom, Centre for Materials and Processes, Environnement, F-59000 Lille, France; Univ. Lille, Univ., ULR 4515 – LGCgE, Laboratoire de Génie Civil et géo-Environnement, F-59000 Lille, FranceMT Nord Europe, Institut Mines-Télécom, Centre for Materials and Processes, Environnement, F-59000 Lille, France; Univ. Lille, Univ., ULR 4515 – LGCgE, Laboratoire de Génie Civil et géo-Environnement, F-59000 Lille, FranceThe objective of this study was to present a new approach to mineral waste valorization, based on the synthesis of hydroxyapatite (HAP) as an efficient and cost-effective adsorbent for the stabilization of fluorides (F-) in soil. Hydroxyapatites were synthesized from the reaction of potassium dihydrogen phosphate (KH2PO4) and waste paper fly ash (WPFA), fine limestone clay (FLC) and limestone filler (LF) rich in calcite. X-ray diffraction characterization results showed that for HAPFLC and HAPFL the main resulting phases were brushite (CaHPO5·2H2O) and for HAPWPFA was hydroxyapatite (Ca5(PO4)3OH). The FTIR spectra showed similar patterns to natural HAP containing orthophosphate groups (PO43-), hydroxylated groups (OH–) and both types A/B of carbonate apatite. SEM-EDS analysis of the individual HAP revealed a morphology consistent with phosphocalcic hydroxyapatite crystals. EDS analysis revealed a Ca/P atomic ratio equal to 1.92, 1.85 and 1.7 for HAPFLC, HAPLF and HAPWPFA respectively, which is similar to the stoichiometry of hydroxyapatites (Ca/P = 1.67). The use of HAP as an amendment to stabilize fluorides (F-) in the soil was demonstrated to be effective, the addition of 1% of the different HAP allowed the decrease of the concentration of F in the raw soil (73.8 mg/kg) to concentrations below the IWSI threshold (10 mg/kg), to 4.68 mg/kg, 5.63 mg/kg, and 0.8 mg/kg for HAPFLC, HAPFL and HAPWPFA respectively. Fluoride (F) sequential extraction results showed that it was extracted from the residual fraction (Fraction 4) after soil treatment, and was generally trapped on the hydroxyapatites (Ca5(PO4)3(OH)) by anion exchange with the hydroxides (OH–) to form the stable and insoluble fluorapatite ((Ca5(PO4)3F).http://www.sciencedirect.com/science/article/pii/S1878535223007232HydroxyapatiteStabilizationFluorideTrapping mechanismMineral wasteSoil |
| spellingShingle | Bader Bouzar Mahfoud Benzerzour Nor-Edine Abriak Fluorine soil stabilization using hydroxyapatite synthesized from minerals wastes Arabian Journal of Chemistry Hydroxyapatite Stabilization Fluoride Trapping mechanism Mineral waste Soil |
| title | Fluorine soil stabilization using hydroxyapatite synthesized from minerals wastes |
| title_full | Fluorine soil stabilization using hydroxyapatite synthesized from minerals wastes |
| title_fullStr | Fluorine soil stabilization using hydroxyapatite synthesized from minerals wastes |
| title_full_unstemmed | Fluorine soil stabilization using hydroxyapatite synthesized from minerals wastes |
| title_short | Fluorine soil stabilization using hydroxyapatite synthesized from minerals wastes |
| title_sort | fluorine soil stabilization using hydroxyapatite synthesized from minerals wastes |
| topic | Hydroxyapatite Stabilization Fluoride Trapping mechanism Mineral waste Soil |
| url | http://www.sciencedirect.com/science/article/pii/S1878535223007232 |
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