Enhanced adsorptive removal of diclofenac sodium from aqueous solution by bentonite-supported nanoscale zero-valent iron
Joint Authors
al-Jabari, Muhammad H.
Sulayman, Salih M.
Source
Arab Journal of Basic and Applied Sciences
Issue
Vol. 28, Issue 1 (31 Dec. 2021), pp.51-63, 13 p.
Publisher
University of Bahrain College of Science
Publication Date
2021-12-31
Country of Publication
Bahrain
No. of Pages
13
Main Subjects
Abstract EN
Nano zero-valent iron-bentonite (B-nZVI) is an excellent composite for treating recalcitrant organic pollutants.
In this study, B-nZVI was prepared via NaBH4 reduction method and characterized using different instruments including X-ray diffractometer (XRD), Fourier-transform infrared spectrometry (FTIR), Field emission scanning electron microscope (SEM), Transmission electron microscope (TEM), and UV–Vis spectroscopy.
Also, the efficiency of B-nZVI as an adsorbent to remove diclofenac sodium (DCF) from aqueous solution was investigated, and compared with activated carbon (AC) under different experimental conditions such as pH, adsorbent dose, DCF initial concentration, temperature, and contact time.
The B-nZVI has successfully removed a high percentage of DCF from aqueous solution (∼80%) within 50 min, 25 °C, and pH = 3.
The maximum adsorption capacity of B-nZVI at equilibrium was 140.8 mg g−1 compared to 107.5 mg g−1 via AC.
Furthermore, it was found that the DCF adsorption best fitted the Langmuir isotherm and pseudo-second-order kinetic models (R2 > 0.987).
Also, the thermodynamic parameters of adsorption were estimated and the average values showed that the adsorption of DCF via B-nZVI is an endothermic process(ΔH∘=29.8±5.2kJ mol−1), and spontaneous with a positive value of entropy (ΔS∘=175.4±11.3J mol−1 K−1) at 25 °C.
The point of zero charge (PZC) was determined (7.0 ± 0.1) using a salt addition method.
Finally, column filtration was demonstrated using a mixture of sand and B-nZVI composite, which showed a significant advantage in comparison with that activated carbon/sand mixture.
American Psychological Association (APA)
Sulayman, Salih M.& al-Jabari, Muhammad H.. 2021. Enhanced adsorptive removal of diclofenac sodium from aqueous solution by bentonite-supported nanoscale zero-valent iron. Arab Journal of Basic and Applied Sciences،Vol. 28, no. 1, pp.51-63.
https://search.emarefa.net/detail/BIM-1340610
Modern Language Association (MLA)
Sulayman, Salih M.& al-Jabari, Muhammad H.. Enhanced adsorptive removal of diclofenac sodium from aqueous solution by bentonite-supported nanoscale zero-valent iron. Arab Journal of Basic and Applied Sciences Vol. 28, no. 1 (2021), pp.51-63.
https://search.emarefa.net/detail/BIM-1340610
American Medical Association (AMA)
Sulayman, Salih M.& al-Jabari, Muhammad H.. Enhanced adsorptive removal of diclofenac sodium from aqueous solution by bentonite-supported nanoscale zero-valent iron. Arab Journal of Basic and Applied Sciences. 2021. Vol. 28, no. 1, pp.51-63.
https://search.emarefa.net/detail/BIM-1340610
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references : p. 61-63
Record ID
BIM-1340610