Developing a magnetic nanocomposite adsorbent based on carbon quantum dots prepared from Pomegranate peel for the removal of Pb(II) and Cd(II) ions from aqueous solution
سال انتشار: 1400
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 64
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شناسه ملی سند علمی:
JR_AMECJ-4-3_002
تاریخ نمایه سازی: 14 آذر 1402
چکیده مقاله:
Agriculture waste is a good choice for the production of carbon dots
owing to its abundance, wide availability, eco-friendly nature. In this
study a novel magnetic bioadsorbent based on carbon quantum dots
(Fe۳O۴-PPCQDs) from Pomegranate peel (PP) was used as adsorbent
to remove lead (Pb) and cadmium (Cd) from ۵۰ mL of water and
wastewater samples by magnetic solid phase extraction (MSPE). After
adsorption ions with Fe۳O۴-PPCQDs at pH=۶, the concentration of
Pb(II) and Cd (II) ions were determined by flame atomic absorption
spectrometry (F-AAS). The manufactured of Fe۳O۴-PPCQDs and GO
nanostructures were structurally characterized by scanning electron
microscopy (SEM), transmission electron microscopy (TEM), X-ray
diffraction (XRD) and Fourier transform infrared spectroscopy (FT-IR).
The quantum dots were optically characterized by UV–Vis spectroscopy.
Batch adsorption experiment was conducted to examine the effects of
pH, contact time, temperature and initial concentration of Pb(II) and
Cd(II) from the water. The preconcentration factor and LOD for Cd
and Pb were obtained ۵۰ and (۱.۳ μg L-۱; ۱۵.۵ μg L-۱), respectively. The
equilibrium data of ions sorption were well described by Langmuir and
Freundlich model. The R۲ values obtained by Langmuir model were
higher. The absorption capacity of Fe۳O۴-PPCQDs for cadmium and
lead were obtained ۱۷.۹۲ and ۲۳.۷۵ mg g-۱, respectively.
کلیدواژه ها:
Carbon quantum dots ، Iron oxide nanoparticles ، Adsorption ، Lead and Cadmium ، Isotherms ، Flame atomic absorption spectrometry
نویسندگان
Hamideh Asadollahzadeh
Department of Chemistry, Faculty of Science, Kerman branch, Islamic Azad University, Kerman, Iran, P. O. Box ۷۶۳۵۱۳۱۱۶۷, Kerman, Iran
Mahdiyeh Ghazizadeh
Department of Chemistry, Faculty of Science, Kerman branch, Islamic Azad University, Kerman, Iran, P. O. Box ۷۶۳۵۱۳۱۱۶۷, Kerman, Iran
Mohammad Manzari
Department of Chemistry, Faculty of Science, Kerman branch, Islamic Azad University, Kerman, Iran, P. O. Box ۷۶۳۵۱۳۱۱۶۷, Kerman, Iran