Radon transport carried by geogas: prediction model.

Autor: Chen X; School of Resource Environment and Safety Engineering, University of South China, Hengyang, 421001, Hunan, China.; Safety Technology Center, University of South China, Hengyang, 421001, Hunan, China., Liu Y; College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen, 518060, China., Jiang Y; School of Resource Environment and Safety Engineering, University of South China, Hengyang, 421001, Hunan, China., Feng S; School of Resource Environment and Safety Engineering, University of South China, Hengyang, 421001, Hunan, China. fengshengyang@usc.edu.cn.
Jazyk: angličtina
Zdroj: Environmental science and pollution research international [Environ Sci Pollut Res Int] 2023 Aug; Vol. 30 (37), pp. 86656-86675. Date of Electronic Publication: 2023 Jul 12.
DOI: 10.1007/s11356-023-28616-4
Abstrakt: This paper provides an overview and information on radon migration in the crust. In the past several decades, numerous studies on radon migration have been published. However, there is no there is no comprehensive review of large-scale radon transport in the earth crust. A literature review was conducted to present the research on the mechanism of radon migration, geogas theory, investigation of multiphase flow, and modeling method of fractures. Molecular diffusion was long considered the primary mechanism for radon migration in the crust. However, a molecular diffusion mechanism cannot explain the understanding of anomalous radon concentrations. In contrast with early views, the process of radon migration and redistribution within the Earth may be determined by geogas (mainly CO 2 and CH 4 ). Microbubbles rising in fractured rocks may be a rapid and efficient way of radon migration, as reported by recent studies. All these hypotheses on the mechanisms of geogas migration are summarized into a theoretical framework, defined as "geogas theory." According to geogas theory, fractures are the principal channel of gas migration. The development of the discrete fracture network (DFN) method is expected to supply a new tool for fracture modeling. It is hoped that this paper will contribute to a deeper understanding of radon migration and fracture modeling.
(© 2023. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.)
Databáze: MEDLINE
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