کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
580637 | 1453154 | 2010 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Heterogeneous photodegradation of pentachlorophenol and iron cycling with goethite, hematite and oxalate under UVA illumination
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
بهداشت و امنیت شیمی
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چکیده انگلیسی
Heterogeneous photodegradation of pentachlorophenol (PCP) in the goethite (α-FeOOH) and hematite (α-Fe2O3) 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 (Cox0) for the PCP degradation with goethite and hematite under the experimental conditions was found to be 1.2 mM, since sufficient Fe(III) as Fe(C2O4)33â and Fe(II) as Fe(C2O4)22â can be formed at Cox0â¥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 H2O2 during photoreaction was studied to explore its relationship with the photodegradation efficiency and the iron cycling process.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Hazardous Materials - Volume 174, Issues 1â3, 15 February 2010, Pages 64-70
Journal: Journal of Hazardous Materials - Volume 174, Issues 1â3, 15 February 2010, Pages 64-70
نویسندگان
Qing Lan, Fang-bai Li, Cui-xiang Sun, Cheng-shuai Liu, Xiang-zhong Li,