Solar-chemical treatment of groundwater contaminated with petroleum at gas station sites: Ex situ remediation using solar/TiO2 photocatalysis and solar Photo-Fenton

被引：0
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作者：
Cho, Il-Hyoung [1 ]
Kim, Young-Gyu [2 ]
Yang, Jae-Kyu [3 ]
Lee, Nae-Hyun [4 ]
Lee, Seung-Mok [3 ,5 ]
机构：
[1] New Town Development Division, Gyeonggi Innovation Corporation
[2] Department of Environmental Science, Yong-In University, Korea, Republic of
[3] Division of Civil and Environmental Engineering, Kwandong University
[4] Dept. of Environmental Eng., Hanjho Engineering Corporation
[5] Division of Civil and Environmental Engineering, Kwandong University, Korea, Republic of
来源：
Journal of Environmental Science and Health - Part A Toxic/Hazardous Substances and Environmental Engineering | 2006年 / 41卷 / 03期
关键词：
Groundwater samples contaminated by BTEX (benzene; toluene; ethylbenzene; xylene isomers and TPHs (total petroleum hydrocarbons) were treated with advanced oxidation processes (AOPs); such as TiO2 photocatalysis and Fe2+/H2O2 exposed to solar light (37°N and 128°E) with an average intensity of 1.7 mW/cm2 at 365 nm. These AOP processes showed feasibility in the treatment of groundwater contaminated with BTEX; TPH and TOC (Total Organic Carbon). Outdoor field tests showed that the degradation efficiency of each contaminant was higher in the Fe 2+/H2O2 system without solar light compared to the TiO2/solar light and H2O2/solar light systems. However; the TiO2/solar light and the Fe2+/H 2O2/solar light systems showed significantly enhanced efficiencies in the degradation of BTEX; TPH and TOC with the additional use of H2O2. Near complete degradation of BTEX and TPH was observed within 2 and 4 hrs; respectively; however; that of TOC was slower. Without pretreatment of the groundwater; fouling of the TiO2; due to the ionic species present; was observed within 1 hr of operation; which resulted in the inhibition of further BTEX; TPH and TOC destruction. The degradation rate of n-alkanes with carbon numbers ranging from C10 to C15 was relatively greater than that of n-alknaes with carbon numbers ranging from C16 to C20. From this work; the AOP process (Fe2+/H2O2/solar light and TiO2/H2O2/solar light) illuminated with solar light was identified as an effective ex situ technique in the remediation of groundwater contaminated with petroleum. Copyright © Taylor & Francis Group; LLC;
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页码：457 / 473
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