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Model applications and mechanism study on the degradation of atrazine by Fenton's system.
J Hazard Mater. 2005 Feb 14; 118(1-3):227-37.JH

Abstract

Atrazine (ATZ), 2-chloro-4-(ethylamino)-6-(isopropylamino)-s-triazine, was effectively degraded by hydroxyl radicals that were generated by FeII/H2O2 in the Fenton's process. Up to 98% ATZ removal can be achieved in the process if the doses of FeII and H2O2 are selected appropriately. Oxidation capacity of the process was successfully predicted through a kinetic approach with three simple and measurable parameters (i.e., two rate constants and a break point time), which makes the model useful in predicting, controlling and optimizing the degradation of ATZ. In addition, the transformation pathways of ATZ decay was successfully investigated by using a novel technology, liquid chromatography electrospray tandem mass spectrometry (LC/ESI-MS/MS). Ten intermediates were identified in the process. The alkylic-oxidation followed by dealkylation and/or dechlorination-hydroxylation were found to be the major pathways of the decay of ATZ in Fenton's process. All the detected intermediates were found to be dealkylated in different levels or positions. The dealkylated species may be further dechlorinated but generally at a lower fraction (<10%) due to the depletion of oxidants.

Authors+Show Affiliations

Department of Civil and Structural Engineering, Research Centre for Environmental Technology and Management, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong.No affiliation info available

Pub Type(s)

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

Language

eng

PubMed ID

15721548

Citation

Chan, K H., and W Chu. "Model Applications and Mechanism Study On the Degradation of Atrazine By Fenton's System." Journal of Hazardous Materials, vol. 118, no. 1-3, 2005, pp. 227-37.
Chan KH, Chu W. Model applications and mechanism study on the degradation of atrazine by Fenton's system. J Hazard Mater. 2005;118(1-3):227-37.
Chan, K. H., & Chu, W. (2005). Model applications and mechanism study on the degradation of atrazine by Fenton's system. Journal of Hazardous Materials, 118(1-3), 227-37.
Chan KH, Chu W. Model Applications and Mechanism Study On the Degradation of Atrazine By Fenton's System. J Hazard Mater. 2005 Feb 14;118(1-3):227-37. PubMed PMID: 15721548.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Model applications and mechanism study on the degradation of atrazine by Fenton's system. AU - Chan,K H, AU - Chu,W, PY - 2004/09/15/received PY - 2004/11/11/revised PY - 2004/11/13/accepted PY - 2005/2/22/pubmed PY - 2005/6/15/medline PY - 2005/2/22/entrez SP - 227 EP - 37 JF - Journal of hazardous materials JO - J Hazard Mater VL - 118 IS - 1-3 N2 - Atrazine (ATZ), 2-chloro-4-(ethylamino)-6-(isopropylamino)-s-triazine, was effectively degraded by hydroxyl radicals that were generated by FeII/H2O2 in the Fenton's process. Up to 98% ATZ removal can be achieved in the process if the doses of FeII and H2O2 are selected appropriately. Oxidation capacity of the process was successfully predicted through a kinetic approach with three simple and measurable parameters (i.e., two rate constants and a break point time), which makes the model useful in predicting, controlling and optimizing the degradation of ATZ. In addition, the transformation pathways of ATZ decay was successfully investigated by using a novel technology, liquid chromatography electrospray tandem mass spectrometry (LC/ESI-MS/MS). Ten intermediates were identified in the process. The alkylic-oxidation followed by dealkylation and/or dechlorination-hydroxylation were found to be the major pathways of the decay of ATZ in Fenton's process. All the detected intermediates were found to be dealkylated in different levels or positions. The dealkylated species may be further dechlorinated but generally at a lower fraction (<10%) due to the depletion of oxidants. SN - 0304-3894 UR - https://www.unboundmedicine.com/medline/citation/15721548/Model_applications_and_mechanism_study_on_the_degradation_of_atrazine_by_Fenton's_system_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0304-3894(04)00568-0 DB - PRIME DP - Unbound Medicine ER -