Volume 10, Issue 3 (Summer 2021)
Arch Hyg Sci 2021, 10(3): 201-214 |
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Mahanpoor K, Sharifnezhad Z. Photo-catalytic Ozonation for Degrading Terephthalic
Acid in Aqueous Environment. Arch Hyg Sci 2021; 10 (3) :201-214
URL: http://jhygiene.muq.ac.ir/article-1-479-en.html
URL: http://jhygiene.muq.ac.ir/article-1-479-en.html
1- Department of Chemistry, Arak Branch, Islamic Azad University, Arak, Iran.
Abstract: (1038 Views)
Background & Aims of the Study: Terfetalic Acid (TPA ) is produced in large quantities
and used in various industries. Besides, TPA is among the main sources of water pollution
in industrialized countries. TPA photo-degradation process was performed in a Circulating
Fluidized Bed Reactor (CFBR) by one Ultraviolet type A (UV-A) lamp and ozone generator
with MnFe2O4/Willemite photo-catalyst.
Materials and Methods: In this research, the nanoparticles of MnFe2O4 and Willemite were
synthesized by co-precipitation reactions and wet mixing method, respectively. Then MnFe2O4/
Willemite was synthesized by the immobilization of MnFe2O4 on Willemite by mechanical
method. Full factorial experimental design with 4 factors, including the pH, the initial
concentration of TPA, the amount of Catalyst (Cat.), and O3 dosage was used for modeling and
optimizing the process.
Results: In the optimal conditions, the amounts of pH, TPA, Cat., and O3 were obtained equal to
9, 20 ppm, 1.5 g/L, and 2.17 mg/h, respectively. In these conditions, degradation efficiency was
obtained to be 98.2695%, and decomposition kinetics was determined as pseudo-first-order with
Kapp=0.2707 min-1, kLH=3.729 ppm min-1, and kadd=0.051 ppm-1.
Conclusion: Comparing experiments results in different processes, such as UV, UV-Cat, O3, UVO
3, Cat-O3, and UV-Cat-O3 revealed that photo-catalytic ozonation (O3/MnFe2O4/Willemite) in the
presence of UV for degradation of TPA in an aqueous environment, present the higher efficiency
and used in various industries. Besides, TPA is among the main sources of water pollution
in industrialized countries. TPA photo-degradation process was performed in a Circulating
Fluidized Bed Reactor (CFBR) by one Ultraviolet type A (UV-A) lamp and ozone generator
with MnFe2O4/Willemite photo-catalyst.
Materials and Methods: In this research, the nanoparticles of MnFe2O4 and Willemite were
synthesized by co-precipitation reactions and wet mixing method, respectively. Then MnFe2O4/
Willemite was synthesized by the immobilization of MnFe2O4 on Willemite by mechanical
method. Full factorial experimental design with 4 factors, including the pH, the initial
concentration of TPA, the amount of Catalyst (Cat.), and O3 dosage was used for modeling and
optimizing the process.
Results: In the optimal conditions, the amounts of pH, TPA, Cat., and O3 were obtained equal to
9, 20 ppm, 1.5 g/L, and 2.17 mg/h, respectively. In these conditions, degradation efficiency was
obtained to be 98.2695%, and decomposition kinetics was determined as pseudo-first-order with
Kapp=0.2707 min-1, kLH=3.729 ppm min-1, and kadd=0.051 ppm-1.
Conclusion: Comparing experiments results in different processes, such as UV, UV-Cat, O3, UVO
3, Cat-O3, and UV-Cat-O3 revealed that photo-catalytic ozonation (O3/MnFe2O4/Willemite) in the
presence of UV for degradation of TPA in an aqueous environment, present the higher efficiency
Type of Study: Original Article |
Subject:
Special
Received: 2020/11/12 | Accepted: 2021/04/3 | Published: 2021/10/2
Received: 2020/11/12 | Accepted: 2021/04/3 | Published: 2021/10/2
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