Extraction of Co(II), Ni(II), Cu(II) and Mn(II) with Deep Eutectic Solvents Dissolved in Heptane as Extractants

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  • OLA Pius Dore
    Department of Chemistry, Faculty of Science and Engineering, Nusa Cendana University
  • KUROBE Yusuke
    Department of Chemical Engineering and Materials Science, Doshisha University
  • MATSUMOTO Michiaki
    Department of Chemical Engineering and Materials Science, Doshisha University

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<p>Recovering, removing, or concentrating metal ions from wastewater containing metal ions is critical because a negative impact can be generated on living organisms by metal-contained wastewater, which contains high concentration of metals, when it is discarded into the environment without pretreatment. In this work we used deep eutectic solvents (DESs) dissolved in heptane as extractants to separate the metal ions from aqueous media with solvent extraction technique and found that DES composed of lidocaine and decanoic acid was a great extractant with extractability that reached 100% for interested metal ions. All the metal ions in the experiment were completely stripped out using 1.0 M of hydrochloric acid. DES can be employed as an extractant of metal ions for three extraction cycles with extractability exceeding 90%. </p>

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