Fanghua Zhu, Zhifeng Zhang, W. Tao, Fanfan Li, Tianyu Wei
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引用次数: 0
Abstract
As one of the extensively used gasoline additives, MTBE can leak into the subsurface, which will not only deteriorate the ecological environment, but also affect the geotechnical characteristics of the soil. In this study, the geotechnical properties of MTBE-contaminated soil consisting of the basic physical properties, strength, compressibility, hydraulic conductivity, leachability, electrical resistivity and microstructural characteristics are comprehensively investigated. The results show that the Atterberg limits consistently decrease with increasing MTBE content in the soil. As the MTBE content increases from 0% to 10%, the specific surface area of the soil decreases by 28%, the sand content increases by 22%, the clay and silt contents decreases by 3% and 18%, respectively. The soil compression index, hydraulic conductivity, leached MTBE concentration and electrical resistivity increase, while the UCS decreases with increasing the MTBE content. Microstructural analysis shows that increasing MTBE content would result in mineralogical alterations that decrease the illite and kaolinite content in the soil. The aggregation and flocculated structures could be detected with an increase in the number and size of the inter-aggregate pores. Additionally, electrical resistivity of the contaminated soil is adopted to assess the geotechnical properties of MTBE-contaminated soil based on the well-established empirical relations.
期刊介绍:
Quarterly Journal of Engineering Geology and Hydrogeology is owned by the Geological Society of London and published by the Geological Society Publishing House.
Quarterly Journal of Engineering Geology & Hydrogeology (QJEGH) is an established peer reviewed international journal featuring papers on geology as applied to civil engineering mining practice and water resources. Papers are invited from, and about, all areas of the world on engineering geology and hydrogeology topics. This includes but is not limited to: applied geophysics, engineering geomorphology, environmental geology, hydrogeology, groundwater quality, ground source heat, contaminated land, waste management, land use planning, geotechnics, rock mechanics, geomaterials and geological hazards.
The journal publishes the prestigious Glossop and Ineson lectures, research papers, case studies, review articles, technical notes, photographic features, thematic sets, discussion papers, editorial opinion and book reviews.