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Distribution, Elimination, and Rearrangement of Cyclic Volatile Methylsiloxanes in Oil-Contaminated Soil of the Shengli Oilfield, China
Sho, Yali; Xu, Shihe; Xu, Lin; Cai, Yaqi
2015-10-06
Source PublicationENVIRONMENTAL SCIENCE & TECHNOLOGY
Volume49Issue:19Pages:11527-11535
AbstractCyclic methylsiloxane standards (D4, D5, and D6) and linear methylsiloxanes (L3 through L16) were detected with high total concentrations (from 5.20 x 10(4) to 1.07 X 10(6) ng/g dw) in 18 oil sludge samples collected from the Shengli oilfield during 2008-2013. In 306 soil samples from this oilfield, the mean concentrations (43.4-125 ng/g dw) and the detection frequencies (65-76%) of D4 D6 were 10.9-11.9 and 2.05-2.24 times higher than those in reference soil samples, respectively. The concentrations of total cyclic siloxanes (Sigma Cyclic) had positive correlations (R-2 = 0.79, p < 0.05) with the total petroleum hydrocarbons concentration (TPH) in soil, indicating that oil production could release cyclic siloxanes to the environment. During 2008-2013, an increasing tendency (mean of 13.4% per annum) of Sigma Cyclic was found in soil with high TPH (>5000 mg/kg) but was not found in soil with lower TPH. Elimination experiments showed that petroleum hydrocarbons could reduce the degradation and volatilization rates of D4, DS, and D6 in impacted oilfield soil. The half-lives of D4, DS, and D6 in the opened and capped soil systems with TPH = 400-40 000 mg/kg were 1.19-22.2 and 1.03-7.43 times larger than those in common soil (TPH = 80 mg/kg), respectively. Furthermore, the petroleum hydrocarbons could affect the rearrangement-reaction rates of DS and D6 in soil.
Department环境化学与生态毒理学国家重点实验室
WOS Research AreaEngineering, Environmental ; Environmental Sciences
WOS IDWOS:000362629100032
Citation statistics
Cited Times:21[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.rcees.ac.cn/handle/311016/32559
Collection环境化学与生态毒理学国家重点实验室
Recommended Citation
GB/T 7714
Sho, Yali,Xu, Shihe,Xu, Lin,et al. Distribution, Elimination, and Rearrangement of Cyclic Volatile Methylsiloxanes in Oil-Contaminated Soil of the Shengli Oilfield, China[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2015,49(19):11527-11535.
APA Sho, Yali,Xu, Shihe,Xu, Lin,&Cai, Yaqi.(2015).Distribution, Elimination, and Rearrangement of Cyclic Volatile Methylsiloxanes in Oil-Contaminated Soil of the Shengli Oilfield, China.ENVIRONMENTAL SCIENCE & TECHNOLOGY,49(19),11527-11535.
MLA Sho, Yali,et al."Distribution, Elimination, and Rearrangement of Cyclic Volatile Methylsiloxanes in Oil-Contaminated Soil of the Shengli Oilfield, China".ENVIRONMENTAL SCIENCE & TECHNOLOGY 49.19(2015):11527-11535.
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