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Fabrication of attapulgite-based dual responsive composite hydrogel and its efficient adsorption for methyl violet.

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Title: Fabrication of attapulgite-based dual responsive composite hydrogel and its efficient adsorption for methyl violet.
Authors: Liu, Yi-xin1,2 (AUTHOR), Zhong, Hui1,2 (AUTHOR) huizhong@hytc.edu.cn, Li, Xiao-rong2 (AUTHOR), Bao, Zhuan-li2 (AUTHOR), Cheng, Zhi-peng2 (AUTHOR), Zhang, Yu-jie2 (AUTHOR), Li, Chun-xiang1 (AUTHOR) lichunxiang76@126.com
Source: Environmental Technology. Apr2022, Vol. 43 Issue 10, p1480-1492. 13p.
Subject Terms: *Adsorption (Chemistry), Hydrogels, Gentian violet, Langmuir isotherms, Fourier transform infrared spectroscopy, Adsorption capacity
Abstract: In this work, attapulgite (ATP)-based dual sensitive poly (N-isopropylacrylamide-co-acrylic acid) composite hydrogel, P(NIPAM-co-AA)/ATP, was prepared by free radical polymerization. The prepared composite hydrogel was characterized via methods of scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR), zeta potential analysis and Brunauer, Emmett, and Teller (BET) etc. The composite hydrogel showed pH and temperature sensitive behaviour, with lower critical solution temperature (LCST) of 35°C and highest swelling occurred at pH 8.0. The adsorption of methyl violet (MV) can be controlled by the hydrogel responsiveness, and 95.78% of MV can be removed at pH 8.0 and 35°C. The addition of a small amount of ATP (3 Wt%) can improve the swelling ratio and adsorption capacity. Kinetic analysis demonstrated that the experimental data were best fitted to the pseudo-second order model. Isotherm analysis showed that the equilibrium data followed Langmuir model with the adsorption capacity of 168.35 mg g−1. In addition, the composite hydrogel has high adsorption selectivity for cationic dyes, and MV-loaded hydrogel is easy to regenerate, which can be used for successive adsorption cycles. These results demonstrate that the composite hydrogel has potential application in dye wastewater treatment. [ABSTRACT FROM AUTHOR]
Copyright of Environmental Technology is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Label: Title
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  Data: Fabrication of attapulgite-based dual responsive composite hydrogel and its efficient adsorption for methyl violet.
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  Data: <searchLink fieldCode="AR" term="%22Liu%2C+Yi-xin%22">Liu, Yi-xin</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhong%2C+Hui%22">Zhong, Hui</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> huizhong@hytc.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Li%2C+Xiao-rong%22">Li, Xiao-rong</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Bao%2C+Zhuan-li%22">Bao, Zhuan-li</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Cheng%2C+Zhi-peng%22">Cheng, Zhi-peng</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhang%2C+Yu-jie%22">Zhang, Yu-jie</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Li%2C+Chun-xiang%22">Li, Chun-xiang</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> lichunxiang76@126.com</i>
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  Data: <searchLink fieldCode="JN" term="%22Environmental+Technology%22">Environmental Technology</searchLink>. Apr2022, Vol. 43 Issue 10, p1480-1492. 13p.
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  Data: *<searchLink fieldCode="DE" term="%22Adsorption+%28Chemistry%29%22">Adsorption (Chemistry)</searchLink><br /><searchLink fieldCode="DE" term="%22Hydrogels%22">Hydrogels</searchLink><br /><searchLink fieldCode="DE" term="%22Gentian+violet%22">Gentian violet</searchLink><br /><searchLink fieldCode="DE" term="%22Langmuir+isotherms%22">Langmuir isotherms</searchLink><br /><searchLink fieldCode="DE" term="%22Fourier+transform+infrared+spectroscopy%22">Fourier transform infrared spectroscopy</searchLink><br /><searchLink fieldCode="DE" term="%22Adsorption+capacity%22">Adsorption capacity</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: In this work, attapulgite (ATP)-based dual sensitive poly (N-isopropylacrylamide-co-acrylic acid) composite hydrogel, P(NIPAM-co-AA)/ATP, was prepared by free radical polymerization. The prepared composite hydrogel was characterized via methods of scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR), zeta potential analysis and Brunauer, Emmett, and Teller (BET) etc. The composite hydrogel showed pH and temperature sensitive behaviour, with lower critical solution temperature (LCST) of 35°C and highest swelling occurred at pH 8.0. The adsorption of methyl violet (MV) can be controlled by the hydrogel responsiveness, and 95.78% of MV can be removed at pH 8.0 and 35°C. The addition of a small amount of ATP (3 Wt%) can improve the swelling ratio and adsorption capacity. Kinetic analysis demonstrated that the experimental data were best fitted to the pseudo-second order model. Isotherm analysis showed that the equilibrium data followed Langmuir model with the adsorption capacity of 168.35 mg g−1. In addition, the composite hydrogel has high adsorption selectivity for cationic dyes, and MV-loaded hydrogel is easy to regenerate, which can be used for successive adsorption cycles. These results demonstrate that the composite hydrogel has potential application in dye wastewater treatment. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Environmental Technology is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1080/09593330.2020.1838623
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      – Code: eng
        Text: English
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      – SubjectFull: Adsorption (Chemistry)
        Type: general
      – SubjectFull: Hydrogels
        Type: general
      – SubjectFull: Gentian violet
        Type: general
      – SubjectFull: Langmuir isotherms
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      – SubjectFull: Fourier transform infrared spectroscopy
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      – SubjectFull: Adsorption capacity
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      – TitleFull: Fabrication of attapulgite-based dual responsive composite hydrogel and its efficient adsorption for methyl violet.
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            NameFull: Liu, Yi-xin
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            NameFull: Zhong, Hui
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            NameFull: Li, Xiao-rong
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            NameFull: Bao, Zhuan-li
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            NameFull: Cheng, Zhi-peng
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            NameFull: Zhang, Yu-jie
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              M: 04
              Text: Apr2022
              Type: published
              Y: 2022
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            – TitleFull: Environmental Technology
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