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Production of sulfate radical from peroxymonosulfate induced by a magnetically separable CuFe2O4 spinel in water: efficiency, stability, and mechanism.
Environ Sci Technol. 2013 Mar 19; 47(6):2784-91.ES

Abstract

A simple, nonhazardous, efficient and low energy-consuming process is desirable to generate powerful radicals from peroxymonosulfate (PMS) for recalcitrant pollutant removal. In this work, the production of radical species from PMS induced by a magnetic CuFe(2)O(4) spinel was studied. Iopromide, a recalcitrant model pollutant, was used to investigate the efficiency of this process. CuFe(2)O(4) showed higher activity and 30 times lower Cu(2+) leaching (1.5 μg L(-1) per 100 mg L(-1)) than a well-crystallized CuO at the same dosage. CuFe(2)O(4) maintained its activity and crystallinity during repeated batch experiments. In comparison, the activity of CuO declined significantly, which was ascribed to the deterioration in its degree of crystallinity. The efficiency of the PMS/CuFe(2)O(4) was highest at neutral pH and decreased at acidic and alkaline pHs. Sulfate radical was the primary radical species responsible for the iopromide degradation. On the basis of the stoichiometry of oxalate degradation in the PMS/CuFe(2)O(4), the radical production yield from PMS was determined to be near 1 mol/mol. The PMS decomposition involved an inner-sphere complexation with the oxide's surface Cu(II) sites. In situ characterization of the oxide surface with ATR-FTIR and Raman during the PMS decomposition suggested that surface Cu(II)-Cu(III)-Cu(II) redox cycle was responsible for the efficient sulfate radical generation from PMS.

Authors+Show Affiliations

Water Desalination and Reuse Center, King Abdullah University of Science and Technology, Thuwal 4700, Kingdom of Saudi Arabia.No affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

23439015

Citation

Zhang, Tao, et al. "Production of Sulfate Radical From Peroxymonosulfate Induced By a Magnetically Separable CuFe2O4 Spinel in Water: Efficiency, Stability, and Mechanism." Environmental Science & Technology, vol. 47, no. 6, 2013, pp. 2784-91.
Zhang T, Zhu H, Croué JP. Production of sulfate radical from peroxymonosulfate induced by a magnetically separable CuFe2O4 spinel in water: efficiency, stability, and mechanism. Environ Sci Technol. 2013;47(6):2784-91.
Zhang, T., Zhu, H., & Croué, J. P. (2013). Production of sulfate radical from peroxymonosulfate induced by a magnetically separable CuFe2O4 spinel in water: efficiency, stability, and mechanism. Environmental Science & Technology, 47(6), 2784-91. https://doi.org/10.1021/es304721g
Zhang T, Zhu H, Croué JP. Production of Sulfate Radical From Peroxymonosulfate Induced By a Magnetically Separable CuFe2O4 Spinel in Water: Efficiency, Stability, and Mechanism. Environ Sci Technol. 2013 Mar 19;47(6):2784-91. PubMed PMID: 23439015.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Production of sulfate radical from peroxymonosulfate induced by a magnetically separable CuFe2O4 spinel in water: efficiency, stability, and mechanism. AU - Zhang,Tao, AU - Zhu,Haibo, AU - Croué,Jean-Philippe, Y1 - 2013/03/07/ PY - 2013/2/27/entrez PY - 2013/2/27/pubmed PY - 2014/3/22/medline SP - 2784 EP - 91 JF - Environmental science & technology JO - Environ. Sci. Technol. VL - 47 IS - 6 N2 - A simple, nonhazardous, efficient and low energy-consuming process is desirable to generate powerful radicals from peroxymonosulfate (PMS) for recalcitrant pollutant removal. In this work, the production of radical species from PMS induced by a magnetic CuFe(2)O(4) spinel was studied. Iopromide, a recalcitrant model pollutant, was used to investigate the efficiency of this process. CuFe(2)O(4) showed higher activity and 30 times lower Cu(2+) leaching (1.5 μg L(-1) per 100 mg L(-1)) than a well-crystallized CuO at the same dosage. CuFe(2)O(4) maintained its activity and crystallinity during repeated batch experiments. In comparison, the activity of CuO declined significantly, which was ascribed to the deterioration in its degree of crystallinity. The efficiency of the PMS/CuFe(2)O(4) was highest at neutral pH and decreased at acidic and alkaline pHs. Sulfate radical was the primary radical species responsible for the iopromide degradation. On the basis of the stoichiometry of oxalate degradation in the PMS/CuFe(2)O(4), the radical production yield from PMS was determined to be near 1 mol/mol. The PMS decomposition involved an inner-sphere complexation with the oxide's surface Cu(II) sites. In situ characterization of the oxide surface with ATR-FTIR and Raman during the PMS decomposition suggested that surface Cu(II)-Cu(III)-Cu(II) redox cycle was responsible for the efficient sulfate radical generation from PMS. SN - 1520-5851 UR - https://www.unboundmedicine.com/medline/citation/23439015/Production_of_sulfate_radical_from_peroxymonosulfate_induced_by_a_magnetically_separable_CuFe2O4_spinel_in_water:_efficiency_stability_and_mechanism_ L2 - https://dx.doi.org/10.1021/es304721g DB - PRIME DP - Unbound Medicine ER -