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	Effect and mechanism of persulfate activated by different methods for PAHs removal in soil
	Zhao D. ; Liao X. Y. ; Yan X. L. ; Huling S. G. ; Chai T. Y. ; Tao H.
	2013
关键词	Persulfate Oxidation PAHs Activation Degradation radical generation chemical oxidation contaminated soil trichloroethylene degradation remediation sediments systems carbon mtbe
英文摘要	The influence of persulfate activation methods on polycyclic aromatic hydrocarbons (PAHs) degradation was investigated and included thermal, citrate chelated iron, and alkaline, and a hydrogen peroxide (H2O2)-persulfate binary mixture. Thermal activation (60 degrees C) resulted in the highest removal of PAHs (99.1%) and persulfate consumption during thermal activation varied (0.45-1.38g/kg soil). Persulfate consumption (0.91-1.22 g/kg soil) and PAHs removal (73.3-82.9%) varied using citrate chelated iron. No significant differences in oxidant consumption and PAH removal was measured in the H2O2-persulfate binary mixture and alkaline activated treatment systems, relative to the unactivated control. Greater removal of high molecular weight PAHs was measured with persulfate activation. Electron spin resonance spectra indicated the presence of hydroxyl radicals in thermally activated systems; weak hydroxyl radical activity in the H2O2 persulfate system; and superoxide radicals were predominant in alkaline activated systems. Differences in oxidative ability of the activated persulfate were related to different radicals generated during activation. (c) 2013 Elsevier B.V. All rights reserved.
出处	Journal of Hazardous Materials
卷	254
页	228-235
收录类别	SCI
语种	英语
ISSN号	0304-3894
内容类型	SCI/SSCI论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/30013]
专题	地理科学与资源研究所_历年回溯文献
推荐引用方式 GB/T 7714	Zhao D.,Liao X. Y.,Yan X. L.,et al. Effect and mechanism of persulfate activated by different methods for PAHs removal in soil. 2013.

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