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Activation of persulfate by homogeneous and heterogeneous iron catalyst to degrade chlortetracycline in aqueous solution.
Chemosphere. 2018 Sep; 207:543-551.C

Abstract

This study investigates the removal of chlortetracycline (CTC) antibiotic using sulfate radical-based oxidation process. Sodium persulfate (PS) was used as a source to generate sulfate radicals by homogeneous (Fe2+) and heterogeneous (zero valent iron, ZVI) iron as a catalyst. Increased EDTA concentration was used to break the CTC-Fe metal complexes during CTC estimation. The influence of various parameters, such as PS concentration, iron (Fe2+ and ZVI) concentration, PS/iron molar ratio, and pH were studied and optimum conditions were reported. CTC removal was increased with increasing concentration of PS and iron at an equal molar ratio of PS/Fe2+ and PS/ZVI processes. PS/Fe2+ and PS/ZVI oxidation processes at 1:2 (500 μM PS and 1000 μM) molar ratio showed 76% and 94% of 1 μM CTC removal in 2 h. Further increased molar ratio 1:2 onwards, PS/Fe2+ process showed a slight increase in CTC degradation whereas in PS/ZVI process showed similar degradation to 1:2 (PS/Fe) ratio at constant PS 500 μM concentration. Slower activation of persulfate which indirectly indicates the slower generation of sulfate radicals in PS/ZVI process showed higher degradation efficiency of CTC. The detected transformation products and their estrogenicity results stated that sulfate radicals seem to be efficient in forming stable and non-toxic end products.

Authors+Show Affiliations

INRS-ETE, Université du Québec, 490, Rue de la Couronne, Québec, Canada G1K 9A9.Service du traitement des eaux, 214, Avenue St-Sacrement, Suite 210, Québec, Canada G1N 3X6.INRS-ETE, Université du Québec, 490, Rue de la Couronne, Québec, Canada G1K 9A9. Electronic address: satinder.brar@ete.inrs.ca.INRS-ETE, Université du Québec, 490, Rue de la Couronne, Québec, Canada G1K 9A9.Service du traitement des eaux, 214, Avenue St-Sacrement, Suite 210, Québec, Canada G1N 3X6.CO2 Solutions Inc., 2300, Rue Jean-Perrin, Québec, Québec G2C 1T9 Canada.Department of Civil Engineering, University of Nebraska-Lincoln, N104 SEC PO Box 886105, Lincoln, NE 68588-6105, USA.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

29843031

Citation

Pulicharla, Rama, et al. "Activation of Persulfate By Homogeneous and Heterogeneous Iron Catalyst to Degrade Chlortetracycline in Aqueous Solution." Chemosphere, vol. 207, 2018, pp. 543-551.
Pulicharla R, Drouinaud R, Brar SK, et al. Activation of persulfate by homogeneous and heterogeneous iron catalyst to degrade chlortetracycline in aqueous solution. Chemosphere. 2018;207:543-551.
Pulicharla, R., Drouinaud, R., Brar, S. K., Drogui, P., Proulx, F., Verma, M., & Surampalli, R. Y. (2018). Activation of persulfate by homogeneous and heterogeneous iron catalyst to degrade chlortetracycline in aqueous solution. Chemosphere, 207, 543-551. https://doi.org/10.1016/j.chemosphere.2018.05.134
Pulicharla R, et al. Activation of Persulfate By Homogeneous and Heterogeneous Iron Catalyst to Degrade Chlortetracycline in Aqueous Solution. Chemosphere. 2018;207:543-551. PubMed PMID: 29843031.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Activation of persulfate by homogeneous and heterogeneous iron catalyst to degrade chlortetracycline in aqueous solution. AU - Pulicharla,Rama, AU - Drouinaud,Roggy, AU - Brar,Satinder Kaur, AU - Drogui,Patrick, AU - Proulx,Francois, AU - Verma,Mausam, AU - Surampalli,Rao Y, Y1 - 2018/05/24/ PY - 2017/11/29/received PY - 2018/04/03/revised PY - 2018/05/23/accepted PY - 2018/5/31/pubmed PY - 2018/8/23/medline PY - 2018/5/30/entrez KW - Chlortetracycline KW - Heterogeneous catalyst KW - Homogeneous catalyst KW - Iron KW - Metal complexation KW - Sulfate radicals SP - 543 EP - 551 JF - Chemosphere JO - Chemosphere VL - 207 N2 - This study investigates the removal of chlortetracycline (CTC) antibiotic using sulfate radical-based oxidation process. Sodium persulfate (PS) was used as a source to generate sulfate radicals by homogeneous (Fe2+) and heterogeneous (zero valent iron, ZVI) iron as a catalyst. Increased EDTA concentration was used to break the CTC-Fe metal complexes during CTC estimation. The influence of various parameters, such as PS concentration, iron (Fe2+ and ZVI) concentration, PS/iron molar ratio, and pH were studied and optimum conditions were reported. CTC removal was increased with increasing concentration of PS and iron at an equal molar ratio of PS/Fe2+ and PS/ZVI processes. PS/Fe2+ and PS/ZVI oxidation processes at 1:2 (500 μM PS and 1000 μM) molar ratio showed 76% and 94% of 1 μM CTC removal in 2 h. Further increased molar ratio 1:2 onwards, PS/Fe2+ process showed a slight increase in CTC degradation whereas in PS/ZVI process showed similar degradation to 1:2 (PS/Fe) ratio at constant PS 500 μM concentration. Slower activation of persulfate which indirectly indicates the slower generation of sulfate radicals in PS/ZVI process showed higher degradation efficiency of CTC. The detected transformation products and their estrogenicity results stated that sulfate radicals seem to be efficient in forming stable and non-toxic end products. SN - 1879-1298 UR - https://www.unboundmedicine.com/medline/citation/29843031/Activation_of_persulfate_by_homogeneous_and_heterogeneous_iron_catalyst_to_degrade_chlortetracycline_in_aqueous_solution_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0045-6535(18)30984-6 DB - PRIME DP - Unbound Medicine ER -