Microwave thermal remediation of soil contaminated with crude oil enhanced by granular activated carbon

The advantage of rapid, selective and simultaneous heating of microwave heating technology was taken to remediate the crude oil-contaminated soil rapidly and to recover the oil contaminant efficiently. The contaminated soil was processed in the microwave field with addition of granular activated car...

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Bibliographic Details
Published inHuanjing kexue Vol. 30; no. 2; p. 557
Main Authors Li, Da-Wei, Zhang, Yao-Bin, Quan, Xie, Zhao, Ya-Zhi
Format Journal Article
LanguageChinese
Published China 15.02.2009
Subjects
Charcoal - chemistry
Environmental Restoration and Remediation - methods
Microwaves
Petroleum - radiation effects
Soil Pollutants - chemistry
Soil Pollutants - radiation effects
Thermal Diffusion
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Summary:The advantage of rapid, selective and simultaneous heating of microwave heating technology was taken to remediate the crude oil-contaminated soil rapidly and to recover the oil contaminant efficiently. The contaminated soil was processed in the microwave field with addition of granular activated carbon (GAC), which was used as strong microwave absorber to enhance microwave heating of the soil mixture to remove the oil contaminant and recover it by a condensation system. The influences of some process parameters on the removal of the oil contaminant and the oil recovery in the remediation process were investigated. The results revealed that, under the condition of 10.0% GAC, 800 W microwave power, 0.08 MPa absolute pressure and 150 mL x min(-1) carrier gas (N2) flow-rate, more than 99% oil removal could be obtained within 15 min using this microwave thermal remediation enhanced by GAC; at the same time, about 91% of the oil contaminant could be recovered without significant changes in chemical composition. In
ISSN:0250-3301