Silica Scaling Inhibition in Water Treatment Process Using Fibrous Al<sub>2</sub>O<sub>3</sub>-Nylon 6 Adsorbents
This study describes a novel approach using fibrous Al<sub>2</sub>O<sub>3</sub>-Nylon 6 composites to induce inhibition behavior in silica scaling systems. The composite fibers were fabricated with a wet-spinning process using the coagulation of a methanolic Nylon-CaCl<sub...
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| Format: | Article |
| Language: | English |
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MDPI AG
2024-01-01
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| Series: | Fibers |
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| Online Access: | https://www.mdpi.com/2079-6439/12/1/11 |
| _version_ | 1797344072594096128 |
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| author | Ngan Thi Thu Phan Minehiko Sato Takaomi Kobayashi |
| author_facet | Ngan Thi Thu Phan Minehiko Sato Takaomi Kobayashi |
| author_sort | Ngan Thi Thu Phan |
| collection | DOAJ |
| description | This study describes a novel approach using fibrous Al<sub>2</sub>O<sub>3</sub>-Nylon 6 composites to induce inhibition behavior in silica scaling systems. The composite fibers were fabricated with a wet-spinning process using the coagulation of a methanolic Nylon-CaCl<sub>2</sub> solution with Al<sub>2</sub>O<sub>3</sub> powder after immersing the thread-like solution in water. The mesoporous nylon fibers composed of Al<sub>2</sub>O<sub>3</sub> powders ranging from 10 to 30 wt% loading demonstrated superior adsorption capabilities to silica in water, behaving with the Freundlich model and exhibiting effective multilayer adsorption onto the Al<sub>2</sub>O<sub>3</sub> sites embedded in the fiber. Furthermore, the composite fibers inhibited silica scaling, even at high concentrations, due to a substantially efficient reduction in soluble silica when the composite fiber was present in the system. The utilization of 15 g of composite fibers resulted in a rapid drop to approximately 30 mg/L within the initial 10 h, which is a considerable improvement compared to the 300 mg/L observed in the fiber-free control sample. Notably, the presence of an elevated fiber content exceeding 7.5 g demonstrated the complete inhibition of silica precipitation. An analysis of the pore volume using nitrogen adsorption experiments before and after silica adsorption showed that silica adsorption resulted in a significant decrease in mesoporous properties at the alumina sites. This indicated an efficient adsorption of silica onto the alumina site, effectively removing silica from the system. |
| first_indexed | 2024-03-08T10:57:03Z |
| format | Article |
| id | doaj.art-35fdfd38e2c6400a8a030945ac9e8ada |
| institution | Directory Open Access Journal |
| issn | 2079-6439 |
| language | English |
| last_indexed | 2024-03-08T10:57:03Z |
| publishDate | 2024-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Fibers |
| spelling | doaj.art-35fdfd38e2c6400a8a030945ac9e8ada2024-01-26T16:24:03ZengMDPI AGFibers2079-64392024-01-011211110.3390/fib12010011Silica Scaling Inhibition in Water Treatment Process Using Fibrous Al<sub>2</sub>O<sub>3</sub>-Nylon 6 AdsorbentsNgan Thi Thu Phan0Minehiko Sato1Takaomi Kobayashi2Department of Science of Technology Innovation, Nagaoka University of Technology, 1603-1 Kamitomioka, Nagaoka 940-2188, Niigata, JapanDepartment of Science of Technology Innovation, Nagaoka University of Technology, 1603-1 Kamitomioka, Nagaoka 940-2188, Niigata, JapanDepartment of Science of Technology Innovation, Nagaoka University of Technology, 1603-1 Kamitomioka, Nagaoka 940-2188, Niigata, JapanThis study describes a novel approach using fibrous Al<sub>2</sub>O<sub>3</sub>-Nylon 6 composites to induce inhibition behavior in silica scaling systems. The composite fibers were fabricated with a wet-spinning process using the coagulation of a methanolic Nylon-CaCl<sub>2</sub> solution with Al<sub>2</sub>O<sub>3</sub> powder after immersing the thread-like solution in water. The mesoporous nylon fibers composed of Al<sub>2</sub>O<sub>3</sub> powders ranging from 10 to 30 wt% loading demonstrated superior adsorption capabilities to silica in water, behaving with the Freundlich model and exhibiting effective multilayer adsorption onto the Al<sub>2</sub>O<sub>3</sub> sites embedded in the fiber. Furthermore, the composite fibers inhibited silica scaling, even at high concentrations, due to a substantially efficient reduction in soluble silica when the composite fiber was present in the system. The utilization of 15 g of composite fibers resulted in a rapid drop to approximately 30 mg/L within the initial 10 h, which is a considerable improvement compared to the 300 mg/L observed in the fiber-free control sample. Notably, the presence of an elevated fiber content exceeding 7.5 g demonstrated the complete inhibition of silica precipitation. An analysis of the pore volume using nitrogen adsorption experiments before and after silica adsorption showed that silica adsorption resulted in a significant decrease in mesoporous properties at the alumina sites. This indicated an efficient adsorption of silica onto the alumina site, effectively removing silica from the system.https://www.mdpi.com/2079-6439/12/1/11silica adsorptionsilica-scaling inhibitionwet-spinning processactivated aluminaNylon 6 |
| spellingShingle | Ngan Thi Thu Phan Minehiko Sato Takaomi Kobayashi Silica Scaling Inhibition in Water Treatment Process Using Fibrous Al<sub>2</sub>O<sub>3</sub>-Nylon 6 Adsorbents Fibers silica adsorption silica-scaling inhibition wet-spinning process activated alumina Nylon 6 |
| title | Silica Scaling Inhibition in Water Treatment Process Using Fibrous Al<sub>2</sub>O<sub>3</sub>-Nylon 6 Adsorbents |
| title_full | Silica Scaling Inhibition in Water Treatment Process Using Fibrous Al<sub>2</sub>O<sub>3</sub>-Nylon 6 Adsorbents |
| title_fullStr | Silica Scaling Inhibition in Water Treatment Process Using Fibrous Al<sub>2</sub>O<sub>3</sub>-Nylon 6 Adsorbents |
| title_full_unstemmed | Silica Scaling Inhibition in Water Treatment Process Using Fibrous Al<sub>2</sub>O<sub>3</sub>-Nylon 6 Adsorbents |
| title_short | Silica Scaling Inhibition in Water Treatment Process Using Fibrous Al<sub>2</sub>O<sub>3</sub>-Nylon 6 Adsorbents |
| title_sort | silica scaling inhibition in water treatment process using fibrous al sub 2 sub o sub 3 sub nylon 6 adsorbents |
| topic | silica adsorption silica-scaling inhibition wet-spinning process activated alumina Nylon 6 |
| url | https://www.mdpi.com/2079-6439/12/1/11 |
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