Chitosan–Silica Composites for Adsorption Application in the Treatment of Water and Wastewater from Anionic Dyes
A series of new types of composites (biopolymer–silica materials) are proposed as selective and effective adsorbents. A new procedure for the synthesis of chitosan–nanosilica composites (ChNS) and chitosan–silica gel composites (ChSG) using geometrical modification of silica and mechanosorption of c...
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MDPI AG
2023-07-01
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| Series: | International Journal of Molecular Sciences |
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| Online Access: | https://www.mdpi.com/1422-0067/24/14/11818 |
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| author | Magdalena Blachnio Malgorzata Zienkiewicz-Strzalka Anna Derylo-Marczewska Liudmyla V. Nosach Eugeny F. Voronin |
| author_facet | Magdalena Blachnio Malgorzata Zienkiewicz-Strzalka Anna Derylo-Marczewska Liudmyla V. Nosach Eugeny F. Voronin |
| author_sort | Magdalena Blachnio |
| collection | DOAJ |
| description | A series of new types of composites (biopolymer–silica materials) are proposed as selective and effective adsorbents. A new procedure for the synthesis of chitosan–nanosilica composites (ChNS) and chitosan–silica gel composites (ChSG) using geometrical modification of silica and mechanosorption of chitosan is applied. The highest adsorption efficiency was achieved at pH = 2, hence the desirability of modifications aimed at stabilizing chitosan in such conditions. The amount of chitosan in the synthesis grew to 1.8 times the adsorption capacity for the nanosilica-supported materials and 1.6 times for the silica gel-based composites. The adsorption kinetics of anionic dyes (acid red AR88) was faster for ChNS than for ChSG, which results from a silica-type effect. The various structural, textural, and physicochemical aspects of the chitosan–silica adsorbents were analyzed via small-angle X-ray scattering, scanning electron microscopy, low-temperature gas (nitrogen) adsorption, and potentiometric titration, as well as their adsorption effectiveness towards selected dyes. This indicates the synergistic effect of the presence of dye-binding groups of the chitosan component, and the developed interfacial surface of the silica component in composites. |
| first_indexed | 2024-03-11T00:59:19Z |
| format | Article |
| id | doaj.art-08996b5c87ef4ee88012ba31acbcdcce |
| institution | Directory Open Access Journal |
| issn | 1661-6596 1422-0067 |
| language | English |
| last_indexed | 2024-03-11T00:59:19Z |
| publishDate | 2023-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | International Journal of Molecular Sciences |
| spelling | doaj.art-08996b5c87ef4ee88012ba31acbcdcce2023-11-18T19:45:30ZengMDPI AGInternational Journal of Molecular Sciences1661-65961422-00672023-07-0124141181810.3390/ijms241411818Chitosan–Silica Composites for Adsorption Application in the Treatment of Water and Wastewater from Anionic DyesMagdalena Blachnio0Malgorzata Zienkiewicz-Strzalka1Anna Derylo-Marczewska2Liudmyla V. Nosach3Eugeny F. Voronin4Faculty of Chemistry, Maria Curie-Sklodowska University, M. Curie-Sklodowska Sq. 3, 20-031 Lublin, PolandFaculty of Chemistry, Maria Curie-Sklodowska University, M. Curie-Sklodowska Sq. 3, 20-031 Lublin, PolandFaculty of Chemistry, Maria Curie-Sklodowska University, M. Curie-Sklodowska Sq. 3, 20-031 Lublin, PolandChuiko Institute of Surface Chemistry, National Academy of Sciences of Ukraine, 17 General Naumov Str., 03164 Kyiv, UkraineChuiko Institute of Surface Chemistry, National Academy of Sciences of Ukraine, 17 General Naumov Str., 03164 Kyiv, UkraineA series of new types of composites (biopolymer–silica materials) are proposed as selective and effective adsorbents. A new procedure for the synthesis of chitosan–nanosilica composites (ChNS) and chitosan–silica gel composites (ChSG) using geometrical modification of silica and mechanosorption of chitosan is applied. The highest adsorption efficiency was achieved at pH = 2, hence the desirability of modifications aimed at stabilizing chitosan in such conditions. The amount of chitosan in the synthesis grew to 1.8 times the adsorption capacity for the nanosilica-supported materials and 1.6 times for the silica gel-based composites. The adsorption kinetics of anionic dyes (acid red AR88) was faster for ChNS than for ChSG, which results from a silica-type effect. The various structural, textural, and physicochemical aspects of the chitosan–silica adsorbents were analyzed via small-angle X-ray scattering, scanning electron microscopy, low-temperature gas (nitrogen) adsorption, and potentiometric titration, as well as their adsorption effectiveness towards selected dyes. This indicates the synergistic effect of the presence of dye-binding groups of the chitosan component, and the developed interfacial surface of the silica component in composites.https://www.mdpi.com/1422-0067/24/14/11818adsorption kineticsadsorption equilibriumdye adsorptionchitosan–silica compositebiopolymerchitosan |
| spellingShingle | Magdalena Blachnio Malgorzata Zienkiewicz-Strzalka Anna Derylo-Marczewska Liudmyla V. Nosach Eugeny F. Voronin Chitosan–Silica Composites for Adsorption Application in the Treatment of Water and Wastewater from Anionic Dyes International Journal of Molecular Sciences adsorption kinetics adsorption equilibrium dye adsorption chitosan–silica composite biopolymer chitosan |
| title | Chitosan–Silica Composites for Adsorption Application in the Treatment of Water and Wastewater from Anionic Dyes |
| title_full | Chitosan–Silica Composites for Adsorption Application in the Treatment of Water and Wastewater from Anionic Dyes |
| title_fullStr | Chitosan–Silica Composites for Adsorption Application in the Treatment of Water and Wastewater from Anionic Dyes |
| title_full_unstemmed | Chitosan–Silica Composites for Adsorption Application in the Treatment of Water and Wastewater from Anionic Dyes |
| title_short | Chitosan–Silica Composites for Adsorption Application in the Treatment of Water and Wastewater from Anionic Dyes |
| title_sort | chitosan silica composites for adsorption application in the treatment of water and wastewater from anionic dyes |
| topic | adsorption kinetics adsorption equilibrium dye adsorption chitosan–silica composite biopolymer chitosan |
| url | https://www.mdpi.com/1422-0067/24/14/11818 |
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