Sorption isotherms and kinetics of Crystal Violet dye uptake from aqueous solution by using polyaniline nanocomposite as adsorbent
The ZnFe₂O₄-PANI nanocomposite has been developed as an adsorbent for the removal of Crystal Violet (CV) dye from aqueous solutions in the present study. The structural and functional characteristics of this material were systematically evaluated through various characterization techniques such as B...
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2025-06-01
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| author | Piyush Gupta Amrita Kaushik Garima Nagpal Markus Diantoro Firdaus Mohamad Hamzah Faisal Islam Chowdhury Pramod K. Singh |
| author_facet | Piyush Gupta Amrita Kaushik Garima Nagpal Markus Diantoro Firdaus Mohamad Hamzah Faisal Islam Chowdhury Pramod K. Singh |
| author_sort | Piyush Gupta |
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| description | The ZnFe₂O₄-PANI nanocomposite has been developed as an adsorbent for the removal of Crystal Violet (CV) dye from aqueous solutions in the present study. The structural and functional characteristics of this material were systematically evaluated through various characterization techniques such as BET, FTIR and XRD. Fourier-transform infrared spectroscopy (FTIR) revealed significant vibrational bands associated with key functional groups that facilitate dye adsorption and confirmed the successful synthesis of the zinc-ferrite polyaniline nanocomposite, as evidenced by shifts in the peaks corresponding to ZnFe₂O₄ and PANi. The adsorption efficiency demonstrated a pH-dependent behaviour, increasing from 42 % at pH 3.0 to 88 % at pH 9.0, while a decline was observed above pH 9, attributed to electrostatic repulsion effects. The adsorption kinetics were effectively described by the pseudo-second-order model, with a maximum removal efficiency of 89 % achieved after a contact period of 60 mins. The analysis of the adsorption isotherm corroborated the applicability of the Langmuir model, indicative of a monolayer adsorption mechanism. Under optimal conditions (pH 9, 0.5 g of adsorbent in 50 ml of solution, and a 60-minute contact time), the ZnFe₂O₄-PANi nanocomposite exhibited endothermic and spontaneous adsorption characteristics. These findings suggest that this material possesses a high capacity and strong affinity for CV, thereby positioning it as a viable adsorbent for dye removal. |
| format | Article |
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| institution | Kabale University |
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| language | English |
| publishDate | 2025-06-01 |
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| spelling | doaj-art-6726cbcdf18f45c3bded4d087ef8e1832025-02-04T04:10:39ZengElsevierChemical Physics Impact2667-02242025-06-0110100834Sorption isotherms and kinetics of Crystal Violet dye uptake from aqueous solution by using polyaniline nanocomposite as adsorbentPiyush Gupta0Amrita Kaushik1Garima Nagpal2Markus Diantoro3Firdaus Mohamad Hamzah4Faisal Islam Chowdhury5Pramod K. Singh6Department of Chemistry, Faculty of Engineering and Technology, SRM Institute of Science and Technology, NCR Campus, Delhi−NCR Campus, Delhi−Meerut Road, Modinagar 201204, Ghaziabad, Uttar Pradesh, IndiaSchool of Environmental and Civil Engineering, Seneca College, CanadaDepartment of Environmental Sciences, School of Basic Science and Research, Sharda University, Greater Noida 201306, India; Corresponding author.Department of Physics, Faculty of Mathematics and Natural Science, Universitas Negeri Malang, Jl. Semarang 5, Malang, 65145, IndonesiaCentre for Defence Foundation Studies, Universiti Pertahanan Nasional Malaysia, Kem Sungai Besi, 57000 Kuala Lumpur, MalaysiaDepartment of Chemistry, University of Chittagong, Chattogram, BangladeshCenter for Solar Cells and Renewable Energy, Dept. of Physics, Sharda University, Greater Noida 201306, IndiaThe ZnFe₂O₄-PANI nanocomposite has been developed as an adsorbent for the removal of Crystal Violet (CV) dye from aqueous solutions in the present study. The structural and functional characteristics of this material were systematically evaluated through various characterization techniques such as BET, FTIR and XRD. Fourier-transform infrared spectroscopy (FTIR) revealed significant vibrational bands associated with key functional groups that facilitate dye adsorption and confirmed the successful synthesis of the zinc-ferrite polyaniline nanocomposite, as evidenced by shifts in the peaks corresponding to ZnFe₂O₄ and PANi. The adsorption efficiency demonstrated a pH-dependent behaviour, increasing from 42 % at pH 3.0 to 88 % at pH 9.0, while a decline was observed above pH 9, attributed to electrostatic repulsion effects. The adsorption kinetics were effectively described by the pseudo-second-order model, with a maximum removal efficiency of 89 % achieved after a contact period of 60 mins. The analysis of the adsorption isotherm corroborated the applicability of the Langmuir model, indicative of a monolayer adsorption mechanism. Under optimal conditions (pH 9, 0.5 g of adsorbent in 50 ml of solution, and a 60-minute contact time), the ZnFe₂O₄-PANi nanocomposite exhibited endothermic and spontaneous adsorption characteristics. These findings suggest that this material possesses a high capacity and strong affinity for CV, thereby positioning it as a viable adsorbent for dye removal.http://www.sciencedirect.com/science/article/pii/S2667022425000222NanocompositeAdsorptionCrystal violetAdsorption isothermKinetic |
| spellingShingle | Piyush Gupta Amrita Kaushik Garima Nagpal Markus Diantoro Firdaus Mohamad Hamzah Faisal Islam Chowdhury Pramod K. Singh Sorption isotherms and kinetics of Crystal Violet dye uptake from aqueous solution by using polyaniline nanocomposite as adsorbent Chemical Physics Impact Nanocomposite Adsorption Crystal violet Adsorption isotherm Kinetic |
| title | Sorption isotherms and kinetics of Crystal Violet dye uptake from aqueous solution by using polyaniline nanocomposite as adsorbent |
| title_full | Sorption isotherms and kinetics of Crystal Violet dye uptake from aqueous solution by using polyaniline nanocomposite as adsorbent |
| title_fullStr | Sorption isotherms and kinetics of Crystal Violet dye uptake from aqueous solution by using polyaniline nanocomposite as adsorbent |
| title_full_unstemmed | Sorption isotherms and kinetics of Crystal Violet dye uptake from aqueous solution by using polyaniline nanocomposite as adsorbent |
| title_short | Sorption isotherms and kinetics of Crystal Violet dye uptake from aqueous solution by using polyaniline nanocomposite as adsorbent |
| title_sort | sorption isotherms and kinetics of crystal violet dye uptake from aqueous solution by using polyaniline nanocomposite as adsorbent |
| topic | Nanocomposite Adsorption Crystal violet Adsorption isotherm Kinetic |
| url | http://www.sciencedirect.com/science/article/pii/S2667022425000222 |
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