Affiliation:
1. College of Civil and Architectural Engineering, Taizhou University, Taizhou 318000, China
2. State Key Laboratory for Geomechanics & Deep Underground Engineering, School of Mechanics & Civil Engineering, China University of Mining and Technology, Xuzhou 221116, China
3. College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, China
Abstract
Volatile organic compounds (VOCs), as a primary pollutant in industrial-contaminated sites or polluted soils, cause severe damage to the soil. Therefore, a comprehensive understanding of the transport of VOCs in soil is imperative to develop effective detection means and removal methods. Among them, biochar possesses potential advantages in the adsorption of VOCs, serving as an effective method for removing VOCs from soil. This review provides an overview of the VOCs within soil, their transport mechanisms, monitoring technology, and removal approach. Firstly, the historical development of the VOC migration mechanism within the capping layer is described in detail. Secondly, the in situ monitoring techniques for VOCs are systematically summarized. Subsequently, one of the effective removal technologies, a capping layer for polluted sites, is simply introduced. Following this, the potential application of a biochar-modified capping layer for the removal of VOCs is comprehensively discussed. Finally, the major challenges in the field and present prospects are outlined. The objective of this study is to furnish researchers with a foundational understanding of VOCs, their relevant information, and their removal approach, inspiring environmental protection and soil pollution control.
Funder
“Pioneer” and “Leading Goose” R&D Program of Zhejiang
Natural Science Foundation of Zhejiang Province
Science and technology project of the Ministry of Housing and Urban-Rural Development
Taizhou science and technology project
Science and technology project of Department of housing and urban–rural development of Zhejiang Province