2024 : 4 : 14
Javad Zolgharnein

Javad Zolgharnein

Academic rank: Professor
ORCID: http://orcid.org/0000-0003-3889-0128
Education: PhD.
ScopusId: 6602705315
Faculty: Science
Address: Arak University
Phone:

Research

Title
Iron terephthalate metal–organic framework (MOF‑235) as an efficient adsorbent for removal of toluidine blue dye from aqueous solution using Box–Behnken design as multivariate optimization approach
Type
JournalPaper
Keywords
Adsorption · Box–Behnken design · Iron terephthalate metal–organic framework · Toluidine blue dye
Year
2020
Journal Journal of the Iranian Chemical Society
DOI
Researchers Ameneh Ashegh Hossini ، Javad Zolgharnein

Abstract

In this work, iron terephthalate metal–organic framework (MOF-235) as an efficient adsorbent has been synthesized and employed for toluidine blue (TB) removal in a batch system. The adsorbent was characterized by Fourier-transform infrared, scanning electron microscopy, and powder X-ray diffraction. The effects of operational parameters including pH, initial dye concentration (Cd), and the adsorbent dosage (m) on the TB adsorption were studied. A Box–Behnken design (BBD) was applied to identify the effective factors on the removal efficiency (R%) of toluidine blue. The optimal conditions were as follows: m = 0.02 g, Cd = 100 mg L−1, and pH = 4.5. The equilibrium adsorption isotherms and kinetic models were also studied. Since the results of the Langmuir model fitted well to all the experimental data (R2 = 0.9972), the maximum monolayer adsorption of TB was 180.4 mg g−1. Furthermore, the pseudo-second-order model describes well the process. Iron terephthalate metal–organic framework (MOF-235) shows a great potential to remove TB from aqueous solution.