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题名: Visible light photodegradation of phenanthrene catalyzed by Fe(III)-smectite: Role of soil organic matter
作者: Jia, HZ (Jia, Hanzhong); Li, L (Li, Li)]; Fan, XY (Fan, Xiaoyun); Liu, MD (Liu, Mingdeng); Deng, WY (Deng, Wenye); Wang, CY (Wang, Chuanyi)
通讯作者: Wang,CY
关键词: Soil organic matter (SOM) ; Phenanthrene ; Smectite ; Visible light photodegradation ; Fenton-like reaction
刊名: Journal of Hazardous Materials  
发表日期: 2013
DOI: 10.1016/j.jhazmat.2013.04.014
卷: 256, 期:7, 页:16-23
收录类别: SCI
资助者: National Natural Science Foundation of China;Western Light" Program of Chinese Academy of Sciences
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.
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内容类型: 期刊论文
URI标识: http://ir.xjipc.cas.cn/handle/365002/2554
Appears in Collections:环境科学与技术研究室_期刊论文

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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

Recommended Citation:
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.
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