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Rapid Communication

2-Mercaptobenzoic acid-based ionic liquids for metal extraction from water without additional chelating agent

Kashif Riaza Department of Chemistry, University of Karachi, Main University Road, Karachi, Pakistan;b Department of Applied Chemistry, University of Karachi, Main University Road, Karachi, PakistanORCID Iconhttps://orcid.org/0000-0002-4490-3186View further author information
ORCID Icon,
Komal Aziz Gilla Department of Chemistry, University of Karachi, Main University Road, Karachi, Pakistan;c Division of Geochronology and Environmental Isotopic Research, Silesian University of Technology, Gliwice, PolandView further author information
,
Shoaib Muhammada Department of Chemistry, University of Karachi, Main University Road, Karachi, PakistanORCID Iconhttps://orcid.org/0000-0003-1382-3084View further author information
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Firdous Imran Alia Department of Chemistry, University of Karachi, Main University Road, Karachi, PakistanORCID Iconhttps://orcid.org/0000-0001-6860-233XView further author information
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Muhammad Naveed Javeda Department of Chemistry, University of Karachi, Main University Road, Karachi, PakistanORCID Iconhttps://orcid.org/0000-0003-3475-0865View further author information
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Agha Arslan Wasima Department of Chemistry, University of Karachi, Main University Road, Karachi, PakistanView further author information
,
William Hendersond Chemistry, School of Science, University of Waikato, Hamilton, New ZealandView further author information
,
Ahmed Barie Department of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, Riyadh, Saudi ArabiaORCID Iconhttps://orcid.org/0000-0002-9447-2361View further author information
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Imran Ali Hashmia Department of Chemistry, University of Karachi, Main University Road, Karachi, PakistanCorrespondence[email protected]
ORCID Iconhttps://orcid.org/0000-0003-1348-7949View further author information
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Received 22 May 2023, Accepted 25 Mar 2024, Published online: 05 Apr 2024
 
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Abstract

Thiosalicylate anions are known for their complexing capacity towards a wide range of transition metals. We have used this important sulfur-containing anion to synthesize the task-specific ionic liquid dioctylimidazolium thiosalicylate [DOIM] [TS] via ion exchange method in two steps. For characterization of [DOIM] [TS] we have used, electron spray ionization mass spectroscopy (ESIMS), nuclear magnetic resonance (NMR), infrared spectroscopy (IR), and thermal gravimetric analysis (TGA). The sulfur-containing IL was investigated for the removal of heavy metals (Cr3+, Mn2+, Fe2+, Co2+, Ni2+, Cu2+) from their aqueous solutions. The extraction efficiencies were determined through atomic absorption spectroscopy.

GRAPHICAL ABSTRACT

Disclosure statement

No potential conflict of interest was reported by the author(s).

Notes

1 mMass – Open Source Mass Spectrometry Tool, www.mmass.org; M. Strohalm, M. Hassman, B. Košata, M. Kodíček, Rapid Commun. Mass Spectrom., 2008, 22, 905.

Additional information

Funding

This work was supported by the King Saud University [grant number RSP-2023-R346].

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