Impact of ultrasonication time on elution of super heavy oil and its biomarkers from aging soils using a Triton X-100 micellar solution.
Impact of ultrasonication time on elution of super heavy oil and its biomarkers from aging soils using a Triton X-100 micellar solution.
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DOI：
10.1016/j.jhazmat.2010.02.090
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发表时间：
2010-07
影响因子：
13.6
通讯作者：
G. Ji;Guohui Zhou
中科院分区：
文献类型：
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作者：
G. Ji;Guohui Zhou
采用Triton X-100超声波强化淋洗系统修复超稠油污染的老化土壤。采用GC/MS、SEM和X射线衍射（XRD）分析了超声波作用时间（0- 1800 s）对超稠油及其3种特征生物标志物（C26-3417α 25-降藿烷、C26- 28三芳甾体[TAS]和C27- 29甲基三芳甾体[MTAS]）的洗脱效果。石油和生物标志物残留在处理过的土壤遵循类似的二阶函数与超声波处理时间的增加。生物标记物洗脱与标记物中的碳数密切相关。对于C26-3417α 25-降藿烷，较小的分子在0- 360 s超声期间更容易洗脱。在1080- 1800 s期间应用超声后，这种趋势发生逆转，较大分子的洗脱得到改善，洗脱遵循类似的二阶函数。对于C26- 28 TAS，较小的分子更容易洗脱，但较大分子的洗脱遵循类似的二阶函数。对于C27- 29 MTAS，较大分子的洗脱接近于C26-3417α 25-降藿烷的洗脱。扫描电镜和X射线衍射分析结果表明，超声处理时间为1080- 1800 s的土壤，其矿物组成和化学组成与清洁土壤相近。
An ultrasound-enhanced elution system with Triton X-100 solution was used to remediate aging soils contaminated with super heavy oil. We used GC/MS, SEM, and X-ray diffraction (XRD) to analyze the effect of ultrasonic time (0–1800s) on the elution of super heavy oil and its three characteristic biomarkers (C26–3417α 25-norhopanes, C26–28triaromatic steroid [TAS], and C27–29methyl triaromatic steroid [MTAS]). The oil and biomarkers remaining in the treated soils followed similar second-order functions with increasing ultrasonication times. Biomarker elution was closely related to carbon numbers in the marker. For C26–3417α 25-norhopanes, the smaller molecules were more readily eluted during 0–360s ultrasound. This trend was reversed upon application of ultrasound during 1080–1800s, with improved elution of larger molecules and elution followed a similar second-order function. For C26–28TAS, smaller molecules were more readily eluted but the elution of larger molecules followed a similar second-order function. For C27–29MTAS, elution of larger molecules was close to that of C26–3417α 25-norhopanes. Results of SEM and XRD indicated that the mineral and chemical compositions of soils eluted at ultrasonication times of 1080–1800s closely resembled clean soils.