Effect of low-molecular-weight organic acids on photo-degradation of phenanthrene catalyzed by Fe(III)-smectite under visible light

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	Effect of low-molecular-weight organic acids on photo-degradation of phenanthrene catalyzed by Fe(III)-smectite under visible light
	Jia, HZ (Jia, Hanzhong); Chen, HX (Chen, Hongxia); Nulaji, G (Nulaji, Gulimire); Li, XY (Li, Xiyou); Wang, CY (Wang, Chuanyi)
刊名	CHEMOSPHERE
	2015
卷号	138 期号:11 页码:266-271
关键词	Low-molecular-weight organic acids (LMWOAs) Phenanthrene Smectite Visible light photodegradation
ISSN号	0045-6535
通讯作者	Wang, CY
英文摘要	The photolysis of polycyclic aromatic hydrocarbons (PAHs) is potentially an important process for its transformation and fate on contaminated soil surfaces. In this study, phenanthrene is employed as a model to explore PAH photodegradation with the assistance of Fe(III)-smectite under visible-light while focusing on roles played by five low-molecular-weight organic acids (LMWOAs), i.e., malic acid, oxalic acid, citric acid, ethylenediaminetetraacetic acid (EDTA), and nitrilotriacetic acid. Our results show that oxalic acid is most effective in promoting the photodegradation of phenanthrene, while only a slight increase in the rate of phenanthrene photodegradation is observed in the presence of malic acid. Electron paramagnetic resonance experiments confirm the formation of (CO2-)-C-center dot radicals in the presence of malic and oxalic acid, which provides strong evidence for generating (OH)-O-center dot and subsequent photoreaction pathways. The presence of EDTA or nitrilotriacetic acid significantly inhibits both Fe(II) formation and phenanthrene photodegradation because these organic anions tend to chelate with Fe(III), leading to decreases in the electron-accepting potential of Fe(III)-smectite and a weakened interaction between phenanthrene and Fe(III)-smectite. These observations provide valuable insights into the transformation and fate of PAHs in the natural soil environment and demonstrate the potential for using some LMWOAs as additives for the remediation of contaminated soil.
收录类别	SCI
WOS记录号	WOS:000361772800037
公开日期	2015-10-23
内容类型	期刊论文
源URL	[http://ir.xjipc.cas.cn/handle/365002/4327]
专题	新疆理化技术研究所_环境科学与技术研究室
作者单位	Chinese Acad Sci, Xinjiang Tech Inst Phys & Chem, Lab Environm Sci & Technol, Key Lab Funct Mat & Devices Special Environm, Urumqi 830011, Xinjiang, Peoples R China;Xinjiang Univ, Sch Geol & Min Engn, Urumqi 830046, Peoples R China
推荐引用方式 GB/T 7714	Jia, HZ ,Chen, HX ,Nulaji, G ,et al. Effect of low-molecular-weight organic acids on photo-degradation of phenanthrene catalyzed by Fe(III)-smectite under visible light[J]. CHEMOSPHERE,2015,138(11):266-271.
APA	Jia, HZ ,Chen, HX ,Nulaji, G ,Li, XY ,&Wang, CY .(2015).Effect of low-molecular-weight organic acids on photo-degradation of phenanthrene catalyzed by Fe(III)-smectite under visible light.CHEMOSPHERE,138(11),266-271.
MLA	Jia, HZ ,et al."Effect of low-molecular-weight organic acids on photo-degradation of phenanthrene catalyzed by Fe(III)-smectite under visible light".CHEMOSPHERE 138.11(2015):266-271.