In recent years, concerns have been raised about the occurrence of active raw materials and
pharmaceutical ingredients that may be present in water, including wastewater, in the pharmaceutical
industry. Wastewater treatment methods are not enough to completely remove active pharmaceuticals
and other waste; thus, this study aims to assess the use of a multiwall carbon nanotube after
derivatization and magnetization as a new and renewable absorbent for removing ibuprofen
from an aqueous medium. The adsorbents were prepared by first oxidizing a multiwall carbon
nanotube and then deriving the oxidized product with hydroxyl amine (m-MWCNT–HA), hydrazine
(m-MWCNT–HYD), and amino acid (m-MWCNT–CYS). Adsorbents were characterized by Raman
spectroscopy, Fourier Transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM
and TEM), Brunauer–Emmett–Teller surface area analysis (BET), thermogravimetric analysis (TGA),
and vibrating sample magnetometer (VSM). Batch adsorption studies were conducted to study the eects of pH, temperature, time, and initial concentration of the adsorbate. Adsorption isotherm, kinetics, and thermodynamics studies were also conducted. The results show that the optimal pH for nearly complete removal of Ibu in a short time at room temperature was 4 for three adsorbents. The adsorption followed the Langmuir isotherm model with pseudo-second-order kinetics.
The percentage of removal of ibuprofen reached up to 98.4%, 93%, and 61.5% for m-MWCNT–CYS,m-MWCNT–HYD, and m-MWCNT–HA respectively. To the best of our knowledge, the grafted MWCNTs presented in this work comprise the first example in the literature of oxidized MWCNT
modified with such functionalities and applied for ibuprofen removal

Title

materials

Publisher

mdpi

Publisher Country

Switzerland

Publication Type

Prtinted only

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Year

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Pages

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