Preparation of biomass-based hydrogels and their efficient heavy metal removal from aqueous solution
In this work, a porous tobacco straw-based polyacrylic acid hydrogel STS-PAA with high adsorption performance was prepared by polymerizing pretreated waste tobacco straw (TS) with acrylic acid/potassium acrylate by UV radiation initiation. The adsorption performance of metal ions was investigated. T...
| Main Authors: | , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2022-12-01
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| Series: | Frontiers in Chemistry |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fchem.2022.1054286/full |
| _version_ | 1811188088297226240 |
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| author | Mingyue Zhang Yaru Zhou Fangling Wang Zeshao Chen Xu Zhao Weidong Duan Guangting Yin Xinling Yang Junfeng Li Quanyu Yin Mingqin Zhao |
| author_facet | Mingyue Zhang Yaru Zhou Fangling Wang Zeshao Chen Xu Zhao Weidong Duan Guangting Yin Xinling Yang Junfeng Li Quanyu Yin Mingqin Zhao |
| author_sort | Mingyue Zhang |
| collection | DOAJ |
| description | In this work, a porous tobacco straw-based polyacrylic acid hydrogel STS-PAA with high adsorption performance was prepared by polymerizing pretreated waste tobacco straw (TS) with acrylic acid/potassium acrylate by UV radiation initiation. The adsorption performance of metal ions was investigated. The effects of different temperatures (25°C, 35°C, and 45°C), adsorption times (1–420 min), pH values (2.0–6.0) and initial concentrations (0.25–4.0 mmol L−1) of metal ions on the adsorption amount of heavy metal ions were investigated. The results showed that the hydrogel had a high removal rate of Pb2+, Cd2+ and Hg2+ in aqueous solution. The adsorption of Pb2+ was particularly effective. When C0 = 4.0 mmol L−1, pH = 6, the equilibrium adsorption amount of Pb2+, Cd2+ and Hg2+ reached 1.49 mmol g−1, 1.02 mmol L−1 and 0.94 mmol g−1, respectively. The chemical structure and morphology of the hydrogels were characterized by FT-IR, EDS, SEM and XPS. The Langmuir model fits well with the adsorption system. The kinetic data suggest the adsorption of Pb2+, Cd2+ and Hg2+ follow the pseudo-first-order model. This indicates that STS-PAA adsorption of three heavy metal ions is monolayer physical adsorption. Thermodynamic analysis shows that the adsorption of Pb2+, Cd2+ and Hg2+ by STS-PAA is an endothermic (ΔH>0) entropy increase (ΔS>0) non-spontaneous reaction. |
| first_indexed | 2024-04-11T14:14:27Z |
| format | Article |
| id | doaj.art-47d48926ff9947fcb1e7b7ac854ffd9a |
| institution | Directory Open Access Journal |
| issn | 2296-2646 |
| language | English |
| last_indexed | 2024-04-11T14:14:27Z |
| publishDate | 2022-12-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Chemistry |
| spelling | doaj.art-47d48926ff9947fcb1e7b7ac854ffd9a2022-12-22T04:19:36ZengFrontiers Media S.A.Frontiers in Chemistry2296-26462022-12-011010.3389/fchem.2022.10542861054286Preparation of biomass-based hydrogels and their efficient heavy metal removal from aqueous solutionMingyue Zhang0Yaru Zhou1Fangling Wang2Zeshao Chen3Xu Zhao4Weidong Duan5Guangting Yin6Xinling Yang7Junfeng Li8Quanyu Yin9Mingqin Zhao10Coll Tobacco Sciences, Flavors and Fragrance Engineering and Technology Research Center Henan, Henan Agriculture University, Zhengzhou, ChinaColl Tobacco Sciences, Flavors and Fragrance Engineering and Technology Research Center Henan, Henan Agriculture University, Zhengzhou, ChinaShiyan Company, China Tobacco Hubei Industrial Ltd., Shiyan, ChinaChina Tobacco Henan Industrial Co Ltd., Zhengzhou, ChinaChina Tobacco Henan Industrial Co Ltd., Zhengzhou, ChinaChina Tobacco Henan Industrial Co Ltd., Zhengzhou, ChinaChina Tobacco Henan Industrial Co Ltd., Zhengzhou, ChinaChina Tobacco Henan Industrial Co Ltd., Zhengzhou, ChinaCollege of Chemistry, Jilin University, Changchun, ChinaColl Tobacco Sciences, Flavors and Fragrance Engineering and Technology Research Center Henan, Henan Agriculture University, Zhengzhou, ChinaColl Tobacco Sciences, Flavors and Fragrance Engineering and Technology Research Center Henan, Henan Agriculture University, Zhengzhou, ChinaIn this work, a porous tobacco straw-based polyacrylic acid hydrogel STS-PAA with high adsorption performance was prepared by polymerizing pretreated waste tobacco straw (TS) with acrylic acid/potassium acrylate by UV radiation initiation. The adsorption performance of metal ions was investigated. The effects of different temperatures (25°C, 35°C, and 45°C), adsorption times (1–420 min), pH values (2.0–6.0) and initial concentrations (0.25–4.0 mmol L−1) of metal ions on the adsorption amount of heavy metal ions were investigated. The results showed that the hydrogel had a high removal rate of Pb2+, Cd2+ and Hg2+ in aqueous solution. The adsorption of Pb2+ was particularly effective. When C0 = 4.0 mmol L−1, pH = 6, the equilibrium adsorption amount of Pb2+, Cd2+ and Hg2+ reached 1.49 mmol g−1, 1.02 mmol L−1 and 0.94 mmol g−1, respectively. The chemical structure and morphology of the hydrogels were characterized by FT-IR, EDS, SEM and XPS. The Langmuir model fits well with the adsorption system. The kinetic data suggest the adsorption of Pb2+, Cd2+ and Hg2+ follow the pseudo-first-order model. This indicates that STS-PAA adsorption of three heavy metal ions is monolayer physical adsorption. Thermodynamic analysis shows that the adsorption of Pb2+, Cd2+ and Hg2+ by STS-PAA is an endothermic (ΔH>0) entropy increase (ΔS>0) non-spontaneous reaction.https://www.frontiersin.org/articles/10.3389/fchem.2022.1054286/fullheavy metal ionshydrogeltobacco strawadsorptionsulfhydryl modified |
| spellingShingle | Mingyue Zhang Yaru Zhou Fangling Wang Zeshao Chen Xu Zhao Weidong Duan Guangting Yin Xinling Yang Junfeng Li Quanyu Yin Mingqin Zhao Preparation of biomass-based hydrogels and their efficient heavy metal removal from aqueous solution Frontiers in Chemistry heavy metal ions hydrogel tobacco straw adsorption sulfhydryl modified |
| title | Preparation of biomass-based hydrogels and their efficient heavy metal removal from aqueous solution |
| title_full | Preparation of biomass-based hydrogels and their efficient heavy metal removal from aqueous solution |
| title_fullStr | Preparation of biomass-based hydrogels and their efficient heavy metal removal from aqueous solution |
| title_full_unstemmed | Preparation of biomass-based hydrogels and their efficient heavy metal removal from aqueous solution |
| title_short | Preparation of biomass-based hydrogels and their efficient heavy metal removal from aqueous solution |
| title_sort | preparation of biomass based hydrogels and their efficient heavy metal removal from aqueous solution |
| topic | heavy metal ions hydrogel tobacco straw adsorption sulfhydryl modified |
| url | https://www.frontiersin.org/articles/10.3389/fchem.2022.1054286/full |
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