risen poisonous contaminants like metal ions, organic and inorganic ions such as nitrate in water and soil. The adsorption
which consists of multiwall carbon nanotubes (MWCNTs) functionalized with chitosan have been synthesized in a composite
to produce a magnetic adsorbent. Composites of MWCNT/nano-iron oxide were characterized by Transmission Electron
Micrograph, Vibrating Sample Magnetometry, Thermogravimetric analysis and Fourier transform infrared spectroscopy. To
investigate the adsorption efficiency for the adsorption of nitrate onto magnetic multiwalled carbon nanotubes functionalized
with chitosan, the effect of solution conditions on each adsorption process were studied. These conditions involve the
effect of contact time, pH value, temperature, adsorbent dose and the initial concentration of adsorbate. The best equilibrium
isotherm model for each adsorption process was studied and the results showed the data follows Langmuir adsorption model
with capacity (
qm) more than 322 (mg/g). The kinetics of adsorption was also investigated, and the data were best fitted to
pseudo-second order. In addition, Van’t Hoff plot was used to measure thermodynamics parameters to study the adsorption
process which showed the spontaneous process. The synthesized adsorbent was also regenerated, and the percentage removal
before and after adsorbent recovery was determined and showed high-efficiency removal. In conclusion, results showed that
the resulting product has high adsorption efficiency and it showed strong complexation properties with nitrate ions.

العنوان

africa chemistry

الناشر

springer

بلد الناشر

المملكة المتحدة

Indexing

Scopus

معامل التأثير

None

نوع المنشور

Both (Printed and Online)

المجلد

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السنة

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الصفحات

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