Amino-Thiol Bifunctional Polysilsesquioxane/Carbon Nanotubes Magnetic Composites as Adsorbents for Hg(II) Removal
Amino-thiol bifunctional polysilsesquioxane/carbon nanotubes (PSQ/CNTs) magnetic composites were prepared by sol-gel method with two types of functional siloxanes coating on carboxyl CNTs simultaneously. The composites were served as efficient adsorbents for removing Hg(II) in aqueous solution and t...
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| Format: | Article |
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Frontiers Media S.A.
2021-11-01
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| Series: | Frontiers in Environmental Chemistry |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fenvc.2021.706254/full |
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| author | Ting Xu Rongjun Qu Ying Zhang Changmei Sun Ying Wang Xiangyu Kong Xue Geng Chunnuan Ji |
| author_facet | Ting Xu Rongjun Qu Ying Zhang Changmei Sun Ying Wang Xiangyu Kong Xue Geng Chunnuan Ji |
| author_sort | Ting Xu |
| collection | DOAJ |
| description | Amino-thiol bifunctional polysilsesquioxane/carbon nanotubes (PSQ/CNTs) magnetic composites were prepared by sol-gel method with two types of functional siloxanes coating on carboxyl CNTs simultaneously. The composites were served as efficient adsorbents for removing Hg(II) in aqueous solution and the adsorption properties were investigated systematically. The optimal pH of bifunctional composites for Hg(II) removal is at pH 4.5. The thermodynamic fitting curves are more consistent with the Langmuir model and the adsorption capacities of the bifunctional composites for Hg(II) varied from 1.63 to 1.94 mmol g−1 at 25°C according to the Langmuir model. The kinetics curves are more fitted to the pseudo-second-order model and the composites could selectively adsorb Hg(II) in a series of binary metal ions solution. The elution regeneration tests showed that the adsorption rate could still reach 78% after repeat cycle three times. It is expected that the bifunctional PSQ/CNTs magnetic composites can be potentially applied to remove low concentration Hg(II) from waste water. |
| first_indexed | 2024-04-11T03:38:34Z |
| format | Article |
| id | doaj.art-24a3c5ae70284ad1bf0e27809e1f1a6c |
| institution | Directory Open Access Journal |
| issn | 2673-4486 |
| language | English |
| last_indexed | 2024-04-11T03:38:34Z |
| publishDate | 2021-11-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Environmental Chemistry |
| spelling | doaj.art-24a3c5ae70284ad1bf0e27809e1f1a6c2023-01-02T04:25:55ZengFrontiers Media S.A.Frontiers in Environmental Chemistry2673-44862021-11-01210.3389/fenvc.2021.706254706254Amino-Thiol Bifunctional Polysilsesquioxane/Carbon Nanotubes Magnetic Composites as Adsorbents for Hg(II) RemovalTing XuRongjun QuYing ZhangChangmei SunYing WangXiangyu KongXue GengChunnuan JiAmino-thiol bifunctional polysilsesquioxane/carbon nanotubes (PSQ/CNTs) magnetic composites were prepared by sol-gel method with two types of functional siloxanes coating on carboxyl CNTs simultaneously. The composites were served as efficient adsorbents for removing Hg(II) in aqueous solution and the adsorption properties were investigated systematically. The optimal pH of bifunctional composites for Hg(II) removal is at pH 4.5. The thermodynamic fitting curves are more consistent with the Langmuir model and the adsorption capacities of the bifunctional composites for Hg(II) varied from 1.63 to 1.94 mmol g−1 at 25°C according to the Langmuir model. The kinetics curves are more fitted to the pseudo-second-order model and the composites could selectively adsorb Hg(II) in a series of binary metal ions solution. The elution regeneration tests showed that the adsorption rate could still reach 78% after repeat cycle three times. It is expected that the bifunctional PSQ/CNTs magnetic composites can be potentially applied to remove low concentration Hg(II) from waste water.https://www.frontiersin.org/articles/10.3389/fenvc.2021.706254/fullpolysilsesquioxaneCNTsadsorptionHg(II)wastewater |
| spellingShingle | Ting Xu Rongjun Qu Ying Zhang Changmei Sun Ying Wang Xiangyu Kong Xue Geng Chunnuan Ji Amino-Thiol Bifunctional Polysilsesquioxane/Carbon Nanotubes Magnetic Composites as Adsorbents for Hg(II) Removal Frontiers in Environmental Chemistry polysilsesquioxane CNTs adsorption Hg(II) wastewater |
| title | Amino-Thiol Bifunctional Polysilsesquioxane/Carbon Nanotubes Magnetic Composites as Adsorbents for Hg(II) Removal |
| title_full | Amino-Thiol Bifunctional Polysilsesquioxane/Carbon Nanotubes Magnetic Composites as Adsorbents for Hg(II) Removal |
| title_fullStr | Amino-Thiol Bifunctional Polysilsesquioxane/Carbon Nanotubes Magnetic Composites as Adsorbents for Hg(II) Removal |
| title_full_unstemmed | Amino-Thiol Bifunctional Polysilsesquioxane/Carbon Nanotubes Magnetic Composites as Adsorbents for Hg(II) Removal |
| title_short | Amino-Thiol Bifunctional Polysilsesquioxane/Carbon Nanotubes Magnetic Composites as Adsorbents for Hg(II) Removal |
| title_sort | amino thiol bifunctional polysilsesquioxane carbon nanotubes magnetic composites as adsorbents for hg ii removal |
| topic | polysilsesquioxane CNTs adsorption Hg(II) wastewater |
| url | https://www.frontiersin.org/articles/10.3389/fenvc.2021.706254/full |
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