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Heterogeneous photodegradation of pentachlorophenol and iron cycling with goethite, hematite and oxalate under UVA illumination.
J Hazard Mater. 2010 Feb 15; 174(1-3):64-70.JH

Abstract

Heterogeneous photodegradation of pentachlorophenol (PCP) in the goethite (alpha-FeOOH) and hematite (alpha-Fe(2)O(3)) systems with oxalate under UVA illumination was investigated. The PCP degradation, dechlorination and detoxification, in terms of Microtox acute toxicity, were all achieved to the higher efficiency in the hematite suspension than in the goethite suspension. The optimal initial concentration of oxalic acid (C(ox)(0)) for the PCP degradation with goethite and hematite under the experimental conditions was found to be 1.2mM, since sufficient Fe(III) as Fe(C(2)O(4))(3)(3-) and Fe(II) as Fe(C(2)O(4))(2)(2-) can be formed at C(ox)(0)>or=1.2mM. The main intermediates of PCP degradation were identified by GC-MS, HPLC and IC analyses. It was found that the cycling process between Fe(III) and Fe(II) in both the goethite and hematite systems occurred more vigorously at the initial stage and gradually became gentle, while the rate of PCP photodegradation varied from fast to slow during the reaction time. Furthermore, the formation of H(2)O(2) during photoreaction was studied to explore its relationship with the photodegradation efficiency and the iron cycling process.

Authors+Show Affiliations

Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, PR 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

19800730

Citation

Lan, Qing, et al. "Heterogeneous Photodegradation of Pentachlorophenol and Iron Cycling With Goethite, Hematite and Oxalate Under UVA Illumination." Journal of Hazardous Materials, vol. 174, no. 1-3, 2010, pp. 64-70.
Lan Q, Li FB, Sun CX, et al. Heterogeneous photodegradation of pentachlorophenol and iron cycling with goethite, hematite and oxalate under UVA illumination. J Hazard Mater. 2010;174(1-3):64-70.
Lan, Q., Li, F. B., Sun, C. X., Liu, C. S., & Li, X. Z. (2010). Heterogeneous photodegradation of pentachlorophenol and iron cycling with goethite, hematite and oxalate under UVA illumination. Journal of Hazardous Materials, 174(1-3), 64-70. https://doi.org/10.1016/j.jhazmat.2009.09.017
Lan Q, et al. Heterogeneous Photodegradation of Pentachlorophenol and Iron Cycling With Goethite, Hematite and Oxalate Under UVA Illumination. J Hazard Mater. 2010 Feb 15;174(1-3):64-70. PubMed PMID: 19800730.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Heterogeneous photodegradation of pentachlorophenol and iron cycling with goethite, hematite and oxalate under UVA illumination. AU - Lan,Qing, AU - Li,Fang-bai, AU - Sun,Cui-xiang, AU - Liu,Cheng-shuai, AU - Li,Xiang-zhong, Y1 - 2009/09/11/ PY - 2008/12/06/received PY - 2009/09/03/revised PY - 2009/09/06/accepted PY - 2009/10/6/entrez PY - 2009/10/6/pubmed PY - 2010/2/23/medline SP - 64 EP - 70 JF - Journal of hazardous materials JO - J Hazard Mater VL - 174 IS - 1-3 N2 - Heterogeneous photodegradation of pentachlorophenol (PCP) in the goethite (alpha-FeOOH) and hematite (alpha-Fe(2)O(3)) systems with oxalate under UVA illumination was investigated. The PCP degradation, dechlorination and detoxification, in terms of Microtox acute toxicity, were all achieved to the higher efficiency in the hematite suspension than in the goethite suspension. The optimal initial concentration of oxalic acid (C(ox)(0)) for the PCP degradation with goethite and hematite under the experimental conditions was found to be 1.2mM, since sufficient Fe(III) as Fe(C(2)O(4))(3)(3-) and Fe(II) as Fe(C(2)O(4))(2)(2-) can be formed at C(ox)(0)>or=1.2mM. The main intermediates of PCP degradation were identified by GC-MS, HPLC and IC analyses. It was found that the cycling process between Fe(III) and Fe(II) in both the goethite and hematite systems occurred more vigorously at the initial stage and gradually became gentle, while the rate of PCP photodegradation varied from fast to slow during the reaction time. Furthermore, the formation of H(2)O(2) during photoreaction was studied to explore its relationship with the photodegradation efficiency and the iron cycling process. SN - 1873-3336 UR - https://www.unboundmedicine.com/medline/citation/19800730/Heterogeneous_photodegradation_of_pentachlorophenol_and_iron_cycling_with_goethite_hematite_and_oxalate_under_UVA_illumination_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0304-3894(09)01463-0 DB - PRIME DP - Unbound Medicine ER -