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Chemosphere

Title:		Characteristics in oxidative degradation by ozone for saturated hydrocarbons in soil contaminated with diesel fuel
Author(s):		Yu DY; Kang N; Bae W; Banks MK;
Address:		"School of Civil Engineering, Purdue University, 550 Stadium Mall Drive, West Lafayette, IN 47907-2051, United States. doyun_yu@yahoo.com"
Journal Title:		Chemosphere
Year:		2007
Volume:		20060726
Issue:		5
Page Number:		799 - 807
DOI:		10.1016/j.chemosphere.2006.06.053
ISSN/ISBN:		0045-6535 (Print) 0045-6535 (Linking)
Abstract:		"Although alkanes are relatively less reactive to chemical oxidation compared to alkenes, the chemical oxidation of alkanes has not been adequately explored in the context of environmental remediation efforts. Laboratory-scale column experiments were therefore conducted with soil artificially contaminated by diesel fuel as a surrogate for alkanes of environmental relevance. Particular attention was paid to saturated hydrocarbons refractory to volatilization. Reaction conditions involve 1485mgkg(-1) of the initial concentration of diesel range organics (DRO) and a constant ozone concentration of 119+/-6mgl(-1) at the flow rate of 50mlmin(-1). The observed removal of DRO reached 94% over 14h of continuous ozone injection. Ozone oxidation demonstrated effective removal of non-volatile DRO in the range of C(12)-C(24). Each alkane compound displayed comparable degradation kinetics, suggesting virtually no selectivity of ozone reactions with alkanes in soil. A pseudo-first order kinetic model closely simulated the removal kinetics, yielding a reaction rate constant of 0.213 (+/-0.021)h(-1) and a half-life of 3.3 (+/-0.3)h under the experimental conditions used in this study. An estimate of ozone demand was 32mg of O(3) (mgDRO)(-1)"
Keywords:		Alkanes/*chemistry *Gasoline Oxidation-Reduction Ozone/*chemistry Soil Pollutants/*chemistry Volatilization;
Notes:		"MedlineYu, Do-Yun Kang, Namgoo Bae, Wookeun Banks, M Katherine eng England 2006/07/29 Chemosphere. 2007 Jan; 66(5):799-807. doi: 10.1016/j.chemosphere.2006.06.053. Epub 2006 Jul 26"