Tags

Type your tag names separated by a space and hit enter

Efficient removal of endosulfan from aqueous solution by UV-C/peroxides: a comparative study.
J Hazard Mater. 2013 Dec 15; 263 Pt 2:584-92.JH

Abstract

This study explored the efficiency of UV-C-based advanced oxidation processes (AOPs), i.e., UV/S2O8(2-), UV/HSO5(-), and UV/H2O2 for the degradation of endosulfan, an organochlorine insecticide and an emerging water pollutant. A significant removal, 91%, 86%, and 64%, of endosulfan, at an initial concentration of 2.45 μM and UV fluence of 480 mJ/cm(2), was achieved by UV/S2O8(2-), UV/HSO5(-), and UV/H2O2 processes, respectively, at a [peroxide]0/[endosulfan]0 molar ratio of 20. The efficiency of these processes was, however, inhibited in the presence of radical scavengers, such as alcohols (e.g., tertiary butyl alcohol and isopropyl alcohol) and natural organic matter (NOM). The inhibition was also influenced by common inorganic anions in the order of nitrite > bicarbonate > chloride > nitrate ≈ sulfate. The observed pseudo-first-order rate constant decreased while the degradation rate increased with increasing initial concentration of the target contaminant. The degradation mechanism of endosulfan by the AOPs was evaluated revealing the main by-product as endosulfan ether. Results of this study suggest that UV-C-based AOPs are potential methods for the removal of pesticides, such as endosulfan and its by-products, from contaminated water.

Authors+Show Affiliations

Radiation Chemistry Laboratory, National Centre of Excellence in Physical Chemistry, University of Peshawar, Peshawar 25120, Pakistan; Environmental Engineering and Science Program, University of Cincinnati, 705 Engineering Research Center, Cincinnati, OH 45221-0012, USA.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

24231332

Citation

Shah, Noor S., et al. "Efficient Removal of Endosulfan From Aqueous Solution By UV-C/peroxides: a Comparative Study." Journal of Hazardous Materials, vol. 263 Pt 2, 2013, pp. 584-92.
Shah NS, He X, Khan HM, et al. Efficient removal of endosulfan from aqueous solution by UV-C/peroxides: a comparative study. J Hazard Mater. 2013;263 Pt 2:584-92.
Shah, N. S., He, X., Khan, H. M., Khan, J. A., O'Shea, K. E., Boccelli, D. L., & Dionysiou, D. D. (2013). Efficient removal of endosulfan from aqueous solution by UV-C/peroxides: a comparative study. Journal of Hazardous Materials, 263 Pt 2, 584-92. https://doi.org/10.1016/j.jhazmat.2013.10.019
Shah NS, et al. Efficient Removal of Endosulfan From Aqueous Solution By UV-C/peroxides: a Comparative Study. J Hazard Mater. 2013 Dec 15;263 Pt 2:584-92. PubMed PMID: 24231332.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Efficient removal of endosulfan from aqueous solution by UV-C/peroxides: a comparative study. AU - Shah,Noor S, AU - He,Xuexiang, AU - Khan,Hasan M, AU - Khan,Javed Ali, AU - O'Shea,Kevin E, AU - Boccelli,Dominic L, AU - Dionysiou,Dionysios D, Y1 - 2013/10/18/ PY - 2013/04/17/received PY - 2013/10/08/revised PY - 2013/10/09/accepted PY - 2013/11/16/entrez PY - 2013/11/16/pubmed PY - 2014/8/15/medline KW - Advanced Oxidation Technologies (AOTs) KW - Advanced oxidation processes (AOPs) KW - Endosulfan KW - Peroxides KW - UV-C KW - Water treatment SP - 584 EP - 92 JF - Journal of hazardous materials JO - J Hazard Mater VL - 263 Pt 2 N2 - This study explored the efficiency of UV-C-based advanced oxidation processes (AOPs), i.e., UV/S2O8(2-), UV/HSO5(-), and UV/H2O2 for the degradation of endosulfan, an organochlorine insecticide and an emerging water pollutant. A significant removal, 91%, 86%, and 64%, of endosulfan, at an initial concentration of 2.45 μM and UV fluence of 480 mJ/cm(2), was achieved by UV/S2O8(2-), UV/HSO5(-), and UV/H2O2 processes, respectively, at a [peroxide]0/[endosulfan]0 molar ratio of 20. The efficiency of these processes was, however, inhibited in the presence of radical scavengers, such as alcohols (e.g., tertiary butyl alcohol and isopropyl alcohol) and natural organic matter (NOM). The inhibition was also influenced by common inorganic anions in the order of nitrite > bicarbonate > chloride > nitrate ≈ sulfate. The observed pseudo-first-order rate constant decreased while the degradation rate increased with increasing initial concentration of the target contaminant. The degradation mechanism of endosulfan by the AOPs was evaluated revealing the main by-product as endosulfan ether. Results of this study suggest that UV-C-based AOPs are potential methods for the removal of pesticides, such as endosulfan and its by-products, from contaminated water. SN - 1873-3336 UR - https://www.unboundmedicine.com/medline/citation/24231332/Efficient_removal_of_endosulfan_from_aqueous_solution_by_UV_C/peroxides:_a_comparative_study_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0304-3894(13)00747-4 DB - PRIME DP - Unbound Medicine ER -