the Extraction and determination of benzene from waters and wastewater samples based on functionalized carbon nanotubes by static head space gas chromatography mass spectrometry

Volume 3, Issue 01, Pages 5-16, Mar 2020 *** Field: Environmental Analytical Chemistry

  • Shahnaz Teimoori Department of Environment and Natural Resources, Islamic Azad University, Science and Research Branch, Tehran, Iran
  • Amir Hessam Hassani *© Corresponding Author: Department of environmental engineering, Faculty of Natural Resources and Environment, Science and Research Branch, Islamic Azad University
  • Mostafaa Panaahie Faculty of Natural Resources and Environment, Science and Research Branch, Islamic Azad University
Keywords: Benzene, Water, Dispersive micro solid phase extraction, Phenyl sulfonic acid, Carbon nanotubes, Static head space gas chromatography mass spectrometry

Abstract

In this study, the phenyl sulfonic acid (PhSA) modified carbon nanotubes (CNTs) were used for benzene removal from waters by  (D- μSPE). Due to adsorption mechanism, π–π interactions was provided between the aromatic ring of benzene with the surface (SO3H) and phenyl ring (-C6H5) of CNTs, respectively. Therefore, 20-100 mg of sorbent, concentration of benzene (0.1–10 mg L-1), pH (1-12) and contact time (5–120 min) were investigated and optimized for benzene removal from water samples in static system. The concentration of benzene in water was determined by (SHS-GC-MS). The results showed, the Langmuir-Freundlich (LF) isotherm provided the best fit for benzene sorption. By using the Langmuir model, the maximum adsorption capacity of 117.34 and 22.86 mg/g was achieved for benzene removal from waters with CNTs@PhSA and CNTs, respectively. Under optimal conditions, adsorption efficiency of CNTs@PhSA and CNTs was obtained 97.7% and 20.6 % for benzene removal from water samples, respectively. 

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Published
2020-03-26
How to Cite
Teimoori, S., Hassani *©A., & Panaahie, M. (2020). the Extraction and determination of benzene from waters and wastewater samples based on functionalized carbon nanotubes by static head space gas chromatography mass spectrometry. Analytical Methods in Environmental Chemistry Journal, 3(01), 17-26. https://doi.org/10.24200/amecj.v3.i01.91
Section
Original Article