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Catalytic degradation of 2,4-dichlorophenoxyacetic acid (2,4-D) by nano-Fe2O3 activated peroxymonosulfate: Influential factors and mechanism determination.
Chemosphere. 2017 Feb; 169:568-576.C

Abstract

2,4-Dichlorophenoxyacetic acid (2,4-D) is one of the most applicable herbicides in the world. Therefore, its residue in aquatic environment threatens the human health and ecosystems. In this study, Fe2O3 (hematite) nanoparticles (HNPs) were synthesized, and the characteristics of the obtained HNPs were determined using X-ray powder diffraction (XRD), field emission scanning electron microscopy (FESEM), Fourier transform infrared spectroscopy (FTIR), Brunauer-Emmett-Teller (BET) technique, and particle size analyzer (PSA). The catalytic activity of HNPs was evaluated for the activation of peroxymonosulfate (PMS) for the degradation of 2,4-D. The effects of the operating parameters were studied for the PMS/HNPs system. The results showed that the acidic condition provided higher efficiency, while overdosing of PMS had a scavenging effect. The PMS/HNPs showed high efficiency in comparison with the homogeneous forms of iron (Fe2+ and Fe3+). Reusability of HNPs was studied in five consequent usages. The presence of the anions (chloride, nitrate, and hydrogen phosphate) reduced the 2,4-D degradation. Moreover, the catalytic activity of HNPs was also investigated in the presence of other oxidants. UV irradiation increased the function of PMS/HNPs and its mechanism was described. The order of 2,4-D removal for the oxidants was PMS > persulfate > H2O2 > percarbonate. A total of 29.7% of 2,4-D chlorine content was released during the destruction of 2,4-D. The quenching study showed that sulfate radical was the major agent in the degradation of 2,4-D.

Authors+Show Affiliations

Environmental Technologies Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran; Department of Environmental Health Engineering, School of Public Health, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.Environmental Technologies Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran; Department of Environmental Health Engineering, School of Public Health, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran. Electronic address: Ghanbari.env@gmail.com.Environmental Technologies Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran; Department of Environmental Health Engineering, School of Public Health, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

27898330

Citation

Jaafarzadeh, Nematollah, et al. "Catalytic Degradation of 2,4-dichlorophenoxyacetic Acid (2,4-D) By nano-Fe2O3 Activated Peroxymonosulfate: Influential Factors and Mechanism Determination." Chemosphere, vol. 169, 2017, pp. 568-576.
Jaafarzadeh N, Ghanbari F, Ahmadi M. Catalytic degradation of 2,4-dichlorophenoxyacetic acid (2,4-D) by nano-Fe2O3 activated peroxymonosulfate: Influential factors and mechanism determination. Chemosphere. 2017;169:568-576.
Jaafarzadeh, N., Ghanbari, F., & Ahmadi, M. (2017). Catalytic degradation of 2,4-dichlorophenoxyacetic acid (2,4-D) by nano-Fe2O3 activated peroxymonosulfate: Influential factors and mechanism determination. Chemosphere, 169, 568-576. https://doi.org/10.1016/j.chemosphere.2016.11.038
Jaafarzadeh N, Ghanbari F, Ahmadi M. Catalytic Degradation of 2,4-dichlorophenoxyacetic Acid (2,4-D) By nano-Fe2O3 Activated Peroxymonosulfate: Influential Factors and Mechanism Determination. Chemosphere. 2017;169:568-576. PubMed PMID: 27898330.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Catalytic degradation of 2,4-dichlorophenoxyacetic acid (2,4-D) by nano-Fe2O3 activated peroxymonosulfate: Influential factors and mechanism determination. AU - Jaafarzadeh,Nematollah, AU - Ghanbari,Farshid, AU - Ahmadi,Mehdi, Y1 - 2016/11/27/ PY - 2016/07/24/received PY - 2016/11/05/revised PY - 2016/11/07/accepted PY - 2016/11/30/pubmed PY - 2017/1/24/medline PY - 2016/11/30/entrez KW - 2,4-Dichlorophenoxyacetic acid KW - Hematite KW - Peroxymonosulfate KW - Photocatalysis KW - Sulfate radical SP - 568 EP - 576 JF - Chemosphere JO - Chemosphere VL - 169 N2 - 2,4-Dichlorophenoxyacetic acid (2,4-D) is one of the most applicable herbicides in the world. Therefore, its residue in aquatic environment threatens the human health and ecosystems. In this study, Fe2O3 (hematite) nanoparticles (HNPs) were synthesized, and the characteristics of the obtained HNPs were determined using X-ray powder diffraction (XRD), field emission scanning electron microscopy (FESEM), Fourier transform infrared spectroscopy (FTIR), Brunauer-Emmett-Teller (BET) technique, and particle size analyzer (PSA). The catalytic activity of HNPs was evaluated for the activation of peroxymonosulfate (PMS) for the degradation of 2,4-D. The effects of the operating parameters were studied for the PMS/HNPs system. The results showed that the acidic condition provided higher efficiency, while overdosing of PMS had a scavenging effect. The PMS/HNPs showed high efficiency in comparison with the homogeneous forms of iron (Fe2+ and Fe3+). Reusability of HNPs was studied in five consequent usages. The presence of the anions (chloride, nitrate, and hydrogen phosphate) reduced the 2,4-D degradation. Moreover, the catalytic activity of HNPs was also investigated in the presence of other oxidants. UV irradiation increased the function of PMS/HNPs and its mechanism was described. The order of 2,4-D removal for the oxidants was PMS > persulfate > H2O2 > percarbonate. A total of 29.7% of 2,4-D chlorine content was released during the destruction of 2,4-D. The quenching study showed that sulfate radical was the major agent in the degradation of 2,4-D. SN - 1879-1298 UR - https://www.unboundmedicine.com/medline/citation/27898330/Catalytic_degradation_of_24_dichlorophenoxyacetic_acid__24_D__by_nano_Fe2O3_activated_peroxymonosulfate:_Influential_factors_and_mechanism_determination_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0045-6535(16)31572-7 DB - PRIME DP - Unbound Medicine ER -