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Oxidative decomposition of atrazine in water in the presence of hydrogen peroxide using an innovative microwave photochemical reactor.
J Hazard Mater. 2011 Feb 28; 186(2-3):1808-15.JH

Abstract

The simultaneous application of microwave (MW) power and UV light leads to improved results in photochemical processes. This study investigates the oxidative decomposition of atrazine in water using an innovative MW and UV photochemical reactor, which activates a chemical reaction with MW and UV radiation using an immersed source without the need for a MW oven. We investigated the influence of reaction parameters such as initial H(2)O(2) concentrations, reaction temperatures and applied MW power and identified the optimal conditions for the oxidative decomposition of atrazine. Atrazine was completely degraded by MW/UV/H(2)O(2) in a very short time (i.e. t(1/2) = 1.1 min for 20.8 mg/L in optimal conditions). From the kinetic study, the disappearance rate of atrazine can be expressed as dX/dt = k(PH)[M](0)(b-X)(1-X), where b ≡ [H(2)O(2)](0)/[M](0)+k(OH)[·OH]/k(PH)[M](0), and X is the atrazine conversion, which correlates well with the experimental data. The kinetic analysis also showed that an indirect reaction of atrazine with an OH radical is dominant at low concentrations of H(2)O(2) and a direct reaction of atrazine with H(2)O(2) is dominant when the concentration of H(2)O(2) is more than 200 mg/L.

Authors+Show Affiliations

Department of Environmental Engineering, Civil & Environment Engineering School, University of Science and Technology Beijing, 30 Xueyuan Road, Haidian District, Beijing 100083, China.No 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

21232855

Citation

Chen, Huilun, et al. "Oxidative Decomposition of Atrazine in Water in the Presence of Hydrogen Peroxide Using an Innovative Microwave Photochemical Reactor." Journal of Hazardous Materials, vol. 186, no. 2-3, 2011, pp. 1808-15.
Chen H, Bramanti E, Longo I, et al. Oxidative decomposition of atrazine in water in the presence of hydrogen peroxide using an innovative microwave photochemical reactor. J Hazard Mater. 2011;186(2-3):1808-15.
Chen, H., Bramanti, E., Longo, I., Onor, M., & Ferrari, C. (2011). Oxidative decomposition of atrazine in water in the presence of hydrogen peroxide using an innovative microwave photochemical reactor. Journal of Hazardous Materials, 186(2-3), 1808-15. https://doi.org/10.1016/j.jhazmat.2010.12.065
Chen H, et al. Oxidative Decomposition of Atrazine in Water in the Presence of Hydrogen Peroxide Using an Innovative Microwave Photochemical Reactor. J Hazard Mater. 2011 Feb 28;186(2-3):1808-15. PubMed PMID: 21232855.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Oxidative decomposition of atrazine in water in the presence of hydrogen peroxide using an innovative microwave photochemical reactor. AU - Chen,Huilun, AU - Bramanti,Emilia, AU - Longo,Iginio, AU - Onor,Massimo, AU - Ferrari,Carlo, Y1 - 2010/12/22/ PY - 2010/08/03/received PY - 2010/10/28/revised PY - 2010/12/15/accepted PY - 2011/1/15/entrez PY - 2011/1/15/pubmed PY - 2011/6/7/medline SP - 1808 EP - 15 JF - Journal of hazardous materials JO - J Hazard Mater VL - 186 IS - 2-3 N2 - The simultaneous application of microwave (MW) power and UV light leads to improved results in photochemical processes. This study investigates the oxidative decomposition of atrazine in water using an innovative MW and UV photochemical reactor, which activates a chemical reaction with MW and UV radiation using an immersed source without the need for a MW oven. We investigated the influence of reaction parameters such as initial H(2)O(2) concentrations, reaction temperatures and applied MW power and identified the optimal conditions for the oxidative decomposition of atrazine. Atrazine was completely degraded by MW/UV/H(2)O(2) in a very short time (i.e. t(1/2) = 1.1 min for 20.8 mg/L in optimal conditions). From the kinetic study, the disappearance rate of atrazine can be expressed as dX/dt = k(PH)[M](0)(b-X)(1-X), where b ≡ [H(2)O(2)](0)/[M](0)+k(OH)[·OH]/k(PH)[M](0), and X is the atrazine conversion, which correlates well with the experimental data. The kinetic analysis also showed that an indirect reaction of atrazine with an OH radical is dominant at low concentrations of H(2)O(2) and a direct reaction of atrazine with H(2)O(2) is dominant when the concentration of H(2)O(2) is more than 200 mg/L. SN - 1873-3336 UR - https://www.unboundmedicine.com/medline/citation/21232855/Oxidative_decomposition_of_atrazine_in_water_in_the_presence_of_hydrogen_peroxide_using_an_innovative_microwave_photochemical_reactor_ DB - PRIME DP - Unbound Medicine ER -