Adsorption of Cu2+ and Ni2+ by oxalic acid-crosslinked chitosan-modified montmorillonite

Tomohito Kameda; Reina Honda; Shogo Kumagai; Yuko Saito; Toshiaki Yoshioka

doi:10.1080/1539445X.2019.1703744

Adsorption of Cu²⁺ and Ni²⁺ by oxalic acid-crosslinked chitosan-modified montmorillonite

Tomohito Kameda, Reina Honda, Shogo Kumagai, Yuko Saito, Toshiaki Yoshioka

Research output: Contribution to journal › Article › peer-review

Abstract

This study undertook the testing of Cu²⁺ and Ni²⁺ adsorption using synthesized oxalic acid-crosslinked chitosan (CTS)-modified montmorillonite (MMT), as well as a kinetic analysis and equilibrium analysis. We believe that our study makes a significant contribution to the literature because we showed that the interlayer distance of untreated MMT was increased from 1.23 to 2.05–2.21 nm, and thus verified the intercalation of CTS into the MMT interlayer. The maximum adsorption of Cu²⁺, as calculated using the Langmuir equation, was significantly higher for oxalic acid-crosslinked CTS-modified MMT, relative to untreated MMT or the non-crosslinked CTS-modified-MMT. The oxalic acid-crosslinked CTS-modified MMT could also take up more Cu²⁺ than Ni²⁺ from a solution containing a mixture of Cu²⁺-Ni²⁺. The selective adsorption of oxalic acid-crosslinked CTS-modified-MMT (i.e. Ni²⁺ < Cu²⁺) is governed by the selective adsorption of CTS and the oxalic acid. This reveals the effect of the complex formation with CTS and oxalic acid.

Original language	English
Pages (from-to)	411-420
Number of pages	10
Journal	Soft Materials
Volume	18
Issue number	4
DOIs	https://doi.org/10.1080/1539445X.2019.1703744
Publication status	Published - 2020 Oct 1

Keywords

Adsorption
chitosan
crosslinked
montmorillonite
oxalic acid

ASJC Scopus subject areas

Chemistry(all)
Materials Science(all)
Condensed Matter Physics

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10.1080/1539445X.2019.1703744

Cite this

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title = "Adsorption of Cu2+ and Ni2+ by oxalic acid-crosslinked chitosan-modified montmorillonite",

abstract = "This study undertook the testing of Cu2+ and Ni2+ adsorption using synthesized oxalic acid-crosslinked chitosan (CTS)-modified montmorillonite (MMT), as well as a kinetic analysis and equilibrium analysis. We believe that our study makes a significant contribution to the literature because we showed that the interlayer distance of untreated MMT was increased from 1.23 to 2.05–2.21 nm, and thus verified the intercalation of CTS into the MMT interlayer. The maximum adsorption of Cu2+, as calculated using the Langmuir equation, was significantly higher for oxalic acid-crosslinked CTS-modified MMT, relative to untreated MMT or the non-crosslinked CTS-modified-MMT. The oxalic acid-crosslinked CTS-modified MMT could also take up more Cu2+ than Ni2+ from a solution containing a mixture of Cu2+-Ni2+. The selective adsorption of oxalic acid-crosslinked CTS-modified-MMT (i.e. Ni2+ < Cu2+) is governed by the selective adsorption of CTS and the oxalic acid. This reveals the effect of the complex formation with CTS and oxalic acid.",

keywords = "Adsorption, chitosan, crosslinked, montmorillonite, oxalic acid",

author = "Tomohito Kameda and Reina Honda and Shogo Kumagai and Yuko Saito and Toshiaki Yoshioka",

note = "Funding Information: This work was supported by JSPS KAKENHI Grant Number 26281036. Publisher Copyright: {\textcopyright} 2019 Taylor & Francis Group, LLC.",

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AU - Kameda, Tomohito

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AU - Kumagai, Shogo

AU - Saito, Yuko

AU - Yoshioka, Toshiaki

PY - 2020/10/1

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N2 - This study undertook the testing of Cu2+ and Ni2+ adsorption using synthesized oxalic acid-crosslinked chitosan (CTS)-modified montmorillonite (MMT), as well as a kinetic analysis and equilibrium analysis. We believe that our study makes a significant contribution to the literature because we showed that the interlayer distance of untreated MMT was increased from 1.23 to 2.05–2.21 nm, and thus verified the intercalation of CTS into the MMT interlayer. The maximum adsorption of Cu2+, as calculated using the Langmuir equation, was significantly higher for oxalic acid-crosslinked CTS-modified MMT, relative to untreated MMT or the non-crosslinked CTS-modified-MMT. The oxalic acid-crosslinked CTS-modified MMT could also take up more Cu2+ than Ni2+ from a solution containing a mixture of Cu2+-Ni2+. The selective adsorption of oxalic acid-crosslinked CTS-modified-MMT (i.e. Ni2+ < Cu2+) is governed by the selective adsorption of CTS and the oxalic acid. This reveals the effect of the complex formation with CTS and oxalic acid.

AB - This study undertook the testing of Cu2+ and Ni2+ adsorption using synthesized oxalic acid-crosslinked chitosan (CTS)-modified montmorillonite (MMT), as well as a kinetic analysis and equilibrium analysis. We believe that our study makes a significant contribution to the literature because we showed that the interlayer distance of untreated MMT was increased from 1.23 to 2.05–2.21 nm, and thus verified the intercalation of CTS into the MMT interlayer. The maximum adsorption of Cu2+, as calculated using the Langmuir equation, was significantly higher for oxalic acid-crosslinked CTS-modified MMT, relative to untreated MMT or the non-crosslinked CTS-modified-MMT. The oxalic acid-crosslinked CTS-modified MMT could also take up more Cu2+ than Ni2+ from a solution containing a mixture of Cu2+-Ni2+. The selective adsorption of oxalic acid-crosslinked CTS-modified-MMT (i.e. Ni2+ < Cu2+) is governed by the selective adsorption of CTS and the oxalic acid. This reveals the effect of the complex formation with CTS and oxalic acid.

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