Extraction and determination of benzene from waters and wastewater samples based on functionalized carbon nanotubes by static head space gas chromatography mass spectrometry
سال انتشار: 1399
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 58
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شناسه ملی سند علمی:
JR_AMECJ-3-1_001
تاریخ نمایه سازی: 14 آذر 1402
چکیده مقاله:
Removal of benzene, as hazardous pollutants from waters and
wastewater is a main problem of environment contamination due to
high risk factor in human health. In this study, the phenyl sulfonic acid
(PhSA) modified carbon nanotubes (CNTs) were used for benzene
removal from waters by dispersive micro solid phase extraction method
(D- μSPE). Due to adsorption mechanism, the polar–π and π–π electron
donor–acceptor interactions was provided between the aromatic ring
of benzene with the surface sulfonic acid groups (SO۳H) and phenyl
ring (-C۶H۵) of CNTs, respectively. Therefore, ۲۰-۱۰۰ mg of sorbent,
concentration of benzene (۰.۱–۱۰ mg L-۱), pH (۱-۱۲) and contact time
(۵–۱۲۰ min) were investigated and optimized for benzene removal
from water samples in static system. The concentration of benzene
in water was determined by static head space gas chromatography
mass spectrometry (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
۱۵۷.۳۴ mg g-۱ and ۲۲.۸۶ mg g-۱ was achieved for benzene removal
from waters with CNTs@PhSA and CNTs, respectively. The method
was validated by certified reference material in waters.
کلیدواژه ها:
Benzene ، Water ، Dispersive micro solid phase extraction ، Phenyl sulfonic acid ، Carbon nanotubes ، Static head space gas chromatography mass spectrometry
نویسندگان
Shahnaz Teimoori
PhD student of environmental engineering, Faculty of Natural Resources and Environment, Science and Research Branch, Islamic Azad University, Tehran, Iran
Amir Hessam Hassani
Department of environmental engineering, Faculty of Natural Resources and Environment, Science and Research Branch, Islamic Azad University, Tehran, Iran
Mostafaa Panaahie
Department of environmental engineering, Faculty of Natural Resources and Environment, Science and Research Branch, Islamic Azad University, Tehran, Iran