Effect of seepage conditions on the microstructural evolution of loess across north-west China.

ABSTRACT: Loess features metastable microstructure and is deemed susceptible to chemical contaminant permeation. However, studies on the loess permeability evolution under water and chemical environments are remarkably limited. In this study, the response of the loess to the water and sodium sulfate seepages was analyzed using the temporal relationship of cations concentration, X-ray diffraction and fluorescence (XRD and XRF), mercury intrusion porosimetry (MIP), and scanning electron microscope (SEM) tests. The permeability evolution characteristics were identified, and its underlying mechanisms were revealed from aspects of the diffuse double layer (DDL) theory and physiochemical actions. The discharge of Mg²⁺ and precipitation of calcium carbonate, referred also to as the dedolomitizat

SUBMITTER: Wang L 

PROVIDER: S-EPMC9287809 | biostudies-literature | 2022 Aug

REPOSITORIES: biostudies-literature