Volume 13, Issue 3 (12-2025)
J Environ Health Eng 2025, 13(3): 268-281 |
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Yari A R, Soheil Arezoomand H R, Nadali A, Ghafuri Y. Photocatalytic degradation of the 2,4-dichlorophenoxyacetic acid in aqueous media using Fe2O3/Mn3O4 nanoparticles combined with sodium persulfate activation under ultraviolet irradiation. J Environ Health Eng 2025; 13 (3) :268-281
URL: http://jehe.abzums.ac.ir/article-1-1131-en.html
URL: http://jehe.abzums.ac.ir/article-1-1131-en.html
1- Research Center for Environmental Pollutants, Qom University of Medical Science, Qom, Iran
2- Environmental Health Engineering, Hamadan University of Medical Science, Hamadan, Iran
2- Environmental Health Engineering, Hamadan University of Medical Science, Hamadan, Iran
Abstract: (10 Views)
Background: The toxicity and persistence of 2,4-dichlorophenoxyacetic acid (2,4-D) lead to its entry into water resources, raising health concerns. This study evaluated the efficiency of a photocatalytic process using Fe₂O₃/Mn3O4 and sodium persulfate (PS) activation under ultraviolet irradiation for removing this contaminant.
Materials and Methods: In this experimental study, Mn₃O₄ and Fe₂O₃ nanoparticles were synthesized via chemical precipitation and hydrothermal methods, respectively. The effects of initial pH (4–10), PS concentration (0–0.8 mg/L), and nanoparticle dosage (0.0–0.04 g/L) on the removal of 10 mg/L 2,4-D were investigated in a batch system. Experimental design and optimization were performed using the response surface methodology (RSM) with a central composite design (CCD).
Results: Under optimal conditions (neutral pH, PS: 0.4 mg/L, nanoparticle dosage: 0.02 g/L), the process achieved 67% removal after 120 minutes. Analysis of variance (ANOVA) indicated the quadratic model had excellent accuracy and fit (R2 = 0.99). pH and PS concentration had the greatest influence on efficiency, with reduced performance at extremely low or high values of these parameters.
Conclusion: The photocatalytic process effectively degrades 2,4-D in water. RSM proved valuable for modeling, optimization, and understanding interactions among operational parameters, aiding in process comprehension and improvement.
Materials and Methods: In this experimental study, Mn₃O₄ and Fe₂O₃ nanoparticles were synthesized via chemical precipitation and hydrothermal methods, respectively. The effects of initial pH (4–10), PS concentration (0–0.8 mg/L), and nanoparticle dosage (0.0–0.04 g/L) on the removal of 10 mg/L 2,4-D were investigated in a batch system. Experimental design and optimization were performed using the response surface methodology (RSM) with a central composite design (CCD).
Results: Under optimal conditions (neutral pH, PS: 0.4 mg/L, nanoparticle dosage: 0.02 g/L), the process achieved 67% removal after 120 minutes. Analysis of variance (ANOVA) indicated the quadratic model had excellent accuracy and fit (R2 = 0.99). pH and PS concentration had the greatest influence on efficiency, with reduced performance at extremely low or high values of these parameters.
Conclusion: The photocatalytic process effectively degrades 2,4-D in water. RSM proved valuable for modeling, optimization, and understanding interactions among operational parameters, aiding in process comprehension and improvement.
Keywords: Herbicide, Sodium Persulfate, Water treatment, Response surface, 2, 4-dichlorophenoxyacetic acid
Type of Study: Research |
Subject:
Special
Received: 2025/08/26 | Accepted: 2025/10/13 | Published: 2025/12/13
Received: 2025/08/26 | Accepted: 2025/10/13 | Published: 2025/12/13
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