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Efficient degradation of atrazine by magnetic porous copper ferrite catalyzed peroxymonosulfate oxidation via the formation of hydroxyl and sulfate radicals.
Water Res. 2013 Sep 15; 47(14):5431-8.WR

Abstract

Magnetic porous copper ferrite (CuFe2O4) showed a notable catalytic activity to peroxymonosulfate (PMS). More than 98% of atrazine was degraded within 15 min at 1 mM PMS and 0.1 g/L CuFe2O4. In contrast, CuFe2O4 exhibited no obvious catalytic activity to peroxodisulfate or H2O2. Several factors affecting the catalytic performance of PMS/CuFe2O4 were investigated. Results showed that the catalytic degradation efficiency of atrazine increased with PMS and CuFe2O4 doses, but decreased with the increase of natural organic matters concentration. The catalytic oxidation also showed a dependence on initial pH. The presence of bicarbonate stimulated atrazine degradation by PMS/CuFe2O4 at low concentrations but inhibited the degradation at high concentrations. Furthermore, the reactive species for atrazine degradation in PMS/CuFe2O4 system were identified as hydroxyl radical (HO) and sulfate radical (SO4(·-)) through competition reactions of atrazine and nitrobenzene, instead of commonly used alcohol scavenging, which was not a reliable method in metal oxide catalyzed oxidation. Surface hydroxyl groups of CuFe2O4 were a critical part in radical generation and the copper on CuFe2O4 surface was an active site to catalyze PMS. The catalytic degradation of atrazine by PMS/CuFe2O4 was also effective under the background of actual waters.

Authors+Show Affiliations

State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, People's Republic of China.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

23916710

Citation

Guan, Ying-Hong, et al. "Efficient Degradation of Atrazine By Magnetic Porous Copper Ferrite Catalyzed Peroxymonosulfate Oxidation Via the Formation of Hydroxyl and Sulfate Radicals." Water Research, vol. 47, no. 14, 2013, pp. 5431-8.
Guan YH, Ma J, Ren YM, et al. Efficient degradation of atrazine by magnetic porous copper ferrite catalyzed peroxymonosulfate oxidation via the formation of hydroxyl and sulfate radicals. Water Res. 2013;47(14):5431-8.
Guan, Y. H., Ma, J., Ren, Y. M., Liu, Y. L., Xiao, J. Y., Lin, L. Q., & Zhang, C. (2013). Efficient degradation of atrazine by magnetic porous copper ferrite catalyzed peroxymonosulfate oxidation via the formation of hydroxyl and sulfate radicals. Water Research, 47(14), 5431-8. https://doi.org/10.1016/j.watres.2013.06.023
Guan YH, et al. Efficient Degradation of Atrazine By Magnetic Porous Copper Ferrite Catalyzed Peroxymonosulfate Oxidation Via the Formation of Hydroxyl and Sulfate Radicals. Water Res. 2013 Sep 15;47(14):5431-8. PubMed PMID: 23916710.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Efficient degradation of atrazine by magnetic porous copper ferrite catalyzed peroxymonosulfate oxidation via the formation of hydroxyl and sulfate radicals. AU - Guan,Ying-Hong, AU - Ma,Jun, AU - Ren,Yue-Ming, AU - Liu,Yu-Lei, AU - Xiao,Jia-Yue, AU - Lin,Ling-qiang, AU - Zhang,Chen, Y1 - 2013/06/20/ PY - 2013/02/03/received PY - 2013/06/06/revised PY - 2013/06/12/accepted PY - 2013/8/7/entrez PY - 2013/8/7/pubmed PY - 2014/4/4/medline KW - Atrazine KW - Copper ferrite KW - Hydroxyl radical KW - Oxone KW - Peroxymonosulfate KW - Sulfate radical SP - 5431 EP - 8 JF - Water research JO - Water Res. VL - 47 IS - 14 N2 - Magnetic porous copper ferrite (CuFe2O4) showed a notable catalytic activity to peroxymonosulfate (PMS). More than 98% of atrazine was degraded within 15 min at 1 mM PMS and 0.1 g/L CuFe2O4. In contrast, CuFe2O4 exhibited no obvious catalytic activity to peroxodisulfate or H2O2. Several factors affecting the catalytic performance of PMS/CuFe2O4 were investigated. Results showed that the catalytic degradation efficiency of atrazine increased with PMS and CuFe2O4 doses, but decreased with the increase of natural organic matters concentration. The catalytic oxidation also showed a dependence on initial pH. The presence of bicarbonate stimulated atrazine degradation by PMS/CuFe2O4 at low concentrations but inhibited the degradation at high concentrations. Furthermore, the reactive species for atrazine degradation in PMS/CuFe2O4 system were identified as hydroxyl radical (HO) and sulfate radical (SO4(·-)) through competition reactions of atrazine and nitrobenzene, instead of commonly used alcohol scavenging, which was not a reliable method in metal oxide catalyzed oxidation. Surface hydroxyl groups of CuFe2O4 were a critical part in radical generation and the copper on CuFe2O4 surface was an active site to catalyze PMS. The catalytic degradation of atrazine by PMS/CuFe2O4 was also effective under the background of actual waters. SN - 1879-2448 UR - https://www.unboundmedicine.com/medline/citation/23916710/Efficient_degradation_of_atrazine_by_magnetic_porous_copper_ferrite_catalyzed_peroxymonosulfate_oxidation_via_the_formation_of_hydroxyl_and_sulfate_radicals_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0043-1354(13)00514-9 DB - PRIME DP - Unbound Medicine ER -