Speciation of arsenic in wastewater samples based on pyributicarbamate /ionic liquids by dispersive liquid-liquid microextraction

Volume 3, Issue 01, Pages 41-48, Mar 2020 *** Field: Environmental Analytical Chemistry

  • Nafiseh Esmaeili Department of chemistry, Semnan University, Semnan, Iran
  • Nadia Kokabi Department of chemistry, Faculty of Science, Semnan University, Semnan, Iran
  • Eskandar Kolvari*© Corresponding Author: Department of chemistry, Faculty of Science, Semnan University, Semnan, Iran
Keywords: Arsenic, Speciation, Wastewater, Pyributicarbamate, Task specific Ionic liquid, Dispersive liquid-liquid microextraction

Abstract

A simple and applied method based on O-3-Tert-butylphenyl N-(6-methoxy-2-pyridyl)-N-methylthiocarbamate (Pyributicarbamate; TBMPMTC) was used for arsenic speciation (AsIII and AsV) in urine and water samples by dispersive liquid-liquid microextraction (DLLME) procedure. The concentrations of arsenic in the liquid phase were determined by hydride generation atomic absorption spectrometry in the presence of flame accessory (HG-AAS). By procedure, a mixture of ionic liquid (0.1 g, [APMIM][PF6]@[HMIM][PF6]), acetone (0.2 mL) and pyributicarbamate was injected into wastewater sample containing arsenic (AsIII and AsV) ions, which were already extracted by pyributicarbamate at the optimized pH. The task-specific ionic liquid (TSIL) of 1-3-aminopropyl)-3-methyl-imidazoliumhexafluorophosphate [APMIM][PF6] was chemically synthesized and used for increasing of As(V) extraction in the liquid phase. As(III) was extracted based on the sulfur bond of pyributicarbamate at pH=5.3. As (V) can be extracted by amine group of TBMPMTC and [APMIM][PF6] at pH=3.0 (As(V) --- : NH2). The influence of parameters was studied.

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Published
2020-03-28
How to Cite
Esmaeili, N., Kokabi, N., & Kolvari*©E. (2020). Speciation of arsenic in wastewater samples based on pyributicarbamate /ionic liquids by dispersive liquid-liquid microextraction. Analytical Methods in Environmental Chemistry Journal, 3(01), 41-48. https://doi.org/10.24200/amecj.v3.i01.93
Section
Original Article