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Visible light photodegradation of phenanthrene catalyzed by Fe(III)-smectite: Role of soil organic matter
Jia, HZ (Jia, Hanzhong); Li, L (Li, Li)]; Fan, XY (Fan, Xiaoyun); Liu, MD (Liu, Mingdeng); Deng, WY (Deng, Wenye); Wang, CY (Wang, Chuanyi); Wang,CY
2013
发表期刊Journal of Hazardous Materials  
ISSN0304-3894
卷号256期号:7页码:16-23
摘要In the present study, phenanthrene is employed as a model to explore the roles played by three soil organic matter (SUM) fractions, i.e., dissolved organic matter (DOM), humic acid (HA), and fulvic acid (FA), in its photodegradation with assistance of Fe(III)-smectite under visible-light. Slight decrease in phenanthrene photodegradation rate was observed in the presence of DOM, which is explained in terms of oxidative-radical competition between DOM and target phenanthrene molecules due to the high electron-donor capacity of phenolic moieties in DOM. On the other hand, a critic content is observed with FA (0.70 mg/g) and HA (0.65 mg/g). Before reaching the critic content, the removal of phenanthrene is accelerated; while after that, the photodegradation rate is suppressed. The acceleration of phenanthrene degradation can be attributed to the photosensitization of FA and HA. Due to the strong interaction between phenanthrene and the phenyl rings, however, the retention of phenanthrene on SOM-Fe(III)-smectite in the presence of high content of HA or FA is enhanced, thus slowing down its photodegradation. Those observations provide valuable insights into the transformation and fate of PAHs in the natural soil environment and open a window for using clay-humic substances complexes for remediation of contaminated soil. (C) 2013 Elsevier B.V. All rights reserved.
关键词Soil Organic Matter (Som) Phenanthrene Smectite Visible Light Photodegradation Fenton-like Reaction
DOI10.1016/j.jhazmat.2013.04.014
收录类别SCI
WOS记录号WOS:000321171700003
引用统计
被引频次:11[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.xjipc.cas.cn/handle/365002/2554
专题环境科学与技术研究室
通讯作者Wang,CY
作者单位Chinese Acad Sci, Xinjiang Tech Inst Phys & Chem, LEMST, Urumqi 830011, Xinjiang, Peoples R China;Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China
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Jia, HZ ,Li, L ,Fan, XY ,et al. Visible light photodegradation of phenanthrene catalyzed by Fe(III)-smectite: Role of soil organic matter[J]. Journal of Hazardous Materials  ,2013,256(7):16-23.
APA Jia, HZ .,Li, L .,Fan, XY .,Liu, MD .,Deng, WY .,...&Wang,CY.(2013).Visible light photodegradation of phenanthrene catalyzed by Fe(III)-smectite: Role of soil organic matter.Journal of Hazardous Materials  ,256(7),16-23.
MLA Jia, HZ ,et al."Visible light photodegradation of phenanthrene catalyzed by Fe(III)-smectite: Role of soil organic matter".Journal of Hazardous Materials   256.7(2013):16-23.
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