Quartz Fine Particle Processing: Hydrophobic Aggregation by Shear Flocculation
This study investigates the hydrophobic aggregation of fine quartz particles through shear flocculation induced by dodecylamine in aqueous solutions. The effect of stirring speed, collector concentration, flocculation time, and pH were investigated. The results showed that the impact of stirring spe...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-09-01
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| Series: | Minerals |
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| Online Access: | https://www.mdpi.com/2075-163X/13/9/1208 |
| _version_ | 1797578698009870336 |
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| author | Francielle Nogueira Karine Rodrigues Carlos Pereira André Carlos Silva Elenice M. Schons Silva Asghar Azizi Ahmad Hassanzadeh |
| author_facet | Francielle Nogueira Karine Rodrigues Carlos Pereira André Carlos Silva Elenice M. Schons Silva Asghar Azizi Ahmad Hassanzadeh |
| author_sort | Francielle Nogueira |
| collection | DOAJ |
| description | This study investigates the hydrophobic aggregation of fine quartz particles through shear flocculation induced by dodecylamine in aqueous solutions. The effect of stirring speed, collector concentration, flocculation time, and pH were investigated. The results showed that the impact of stirring speed on particle aggregation in the absence of a collector is very limited. Quantitative analyses demonstrated that the variation of collector concentration intensified the flocculation process more than the stirring rate. Numerical optimization showed that the large volume occupied by the flocs was 12.3 mL, achieved with a stirring speed of 2135 rpm and dodecylamine concentration of 1.39 × 10<sup>−2</sup> mol·L<sup>−1</sup>. The highest quartz particle aggregation was observed at pH 10.5, corroborating the importance of the non-dissociated amine molecules for particle hydrophobization. High zeta potential values did not result in reducing aggregation, indicating that hydrophobicity was the governing factor in the shear flocculation process. |
| first_indexed | 2024-03-10T22:26:29Z |
| format | Article |
| id | doaj.art-c351110f53144ded9dc2114253f469f3 |
| institution | Directory Open Access Journal |
| issn | 2075-163X |
| language | English |
| last_indexed | 2024-03-10T22:26:29Z |
| publishDate | 2023-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Minerals |
| spelling | doaj.art-c351110f53144ded9dc2114253f469f32023-11-19T12:05:49ZengMDPI AGMinerals2075-163X2023-09-01139120810.3390/min13091208Quartz Fine Particle Processing: Hydrophobic Aggregation by Shear FlocculationFrancielle Nogueira0Karine Rodrigues1Carlos Pereira2André Carlos Silva3Elenice M. Schons Silva4Asghar Azizi5Ahmad Hassanzadeh6School of Mines, Federal University of Ouro Preto, Ouro Preto 35400-000, BrazilSchool of Mines, Federal University of Ouro Preto, Ouro Preto 35400-000, BrazilSchool of Mines, Federal University of Ouro Preto, Ouro Preto 35400-000, BrazilModelling and Mineral Processing Research Lab (LaMPPMin), Federal University of Catalão, Catalão 75705-321, BrazilModelling and Mineral Processing Research Lab (LaMPPMin), Federal University of Catalão, Catalão 75705-321, BrazilFaculty of Mining, Petroleum & Geophysics Engineering, Shahrood University of Technology, Shahrood 3619995161, IranDepartment of Geoscience and Petroleum, Faculty of Engineering, Norwegian University of Science and Technology, 7031 Trondheim, NorwayThis study investigates the hydrophobic aggregation of fine quartz particles through shear flocculation induced by dodecylamine in aqueous solutions. The effect of stirring speed, collector concentration, flocculation time, and pH were investigated. The results showed that the impact of stirring speed on particle aggregation in the absence of a collector is very limited. Quantitative analyses demonstrated that the variation of collector concentration intensified the flocculation process more than the stirring rate. Numerical optimization showed that the large volume occupied by the flocs was 12.3 mL, achieved with a stirring speed of 2135 rpm and dodecylamine concentration of 1.39 × 10<sup>−2</sup> mol·L<sup>−1</sup>. The highest quartz particle aggregation was observed at pH 10.5, corroborating the importance of the non-dissociated amine molecules for particle hydrophobization. High zeta potential values did not result in reducing aggregation, indicating that hydrophobicity was the governing factor in the shear flocculation process.https://www.mdpi.com/2075-163X/13/9/1208shear flocculationfine quartz particleshydrophobic aggregationdodecylamine |
| spellingShingle | Francielle Nogueira Karine Rodrigues Carlos Pereira André Carlos Silva Elenice M. Schons Silva Asghar Azizi Ahmad Hassanzadeh Quartz Fine Particle Processing: Hydrophobic Aggregation by Shear Flocculation Minerals shear flocculation fine quartz particles hydrophobic aggregation dodecylamine |
| title | Quartz Fine Particle Processing: Hydrophobic Aggregation by Shear Flocculation |
| title_full | Quartz Fine Particle Processing: Hydrophobic Aggregation by Shear Flocculation |
| title_fullStr | Quartz Fine Particle Processing: Hydrophobic Aggregation by Shear Flocculation |
| title_full_unstemmed | Quartz Fine Particle Processing: Hydrophobic Aggregation by Shear Flocculation |
| title_short | Quartz Fine Particle Processing: Hydrophobic Aggregation by Shear Flocculation |
| title_sort | quartz fine particle processing hydrophobic aggregation by shear flocculation |
| topic | shear flocculation fine quartz particles hydrophobic aggregation dodecylamine |
| url | https://www.mdpi.com/2075-163X/13/9/1208 |
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