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Assessment of the semipermeable membrane effect of illite and montmorillonite on dissolved thallium diffusionстатья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
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Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 15 апреля 2026 г.
- Авторы: Liu Yu, Simin Hu, Lezhang Wei, Dinggui Luo, Tangfu Xiao
- Журнал: Engineering Geology
- Том: 365
- Год издания: 2026
- Издательство: Elsevier BV
- Местоположение издательства: Netherlands
- Номер статьи: 108668
- DOI: 10.1016/j.enggeo.2026.108668
- Аннотация: The natural barrier properties of low-permeability clay layers have led to widespread interest in their applicationin the environmental field. Research on the protective and retardant effects of clay layers on low concentrationsof highly toxic thallium is limited. A comparison revealed that the proportion of the active fraction of thallium inillite and montmorillonite was relatively low, indicating that these clays play an important role in thalliumfixation. The focus of this work was an experimental investigation of the semipermeable membrane behaviour ofillite and montmorillonite. Chemical osmotic differential pressure tests were performed at five thallium concentrations(0.5 mg/L to 50 mg/L), and the chemico-osmotic efficiency coefficients (ω) were calculated. Montmorillonite(ω, 0.048–0.651) has greater chemico-osmotic efficiency coefficients than illite (ω, 0.045–0.437). ωincreased as the concentration of dissolved thallium decreased, indicating that the semipermeable membraneeffects of the illite and montmorillonite layers were stronger at low thallium concentrations. The effectivediffusion coefficients and retardation factors for thallium in illite and montmorillonite were calculated. Thefindings of this study must be considered in the context of ion competition effects within complex chemicalenvironments. Studying the semipermeable membrane effect of clays on low concentrations of dissolved Tl mayaid in clarifying the natural cleaning and barrier properties of clay, as well as support its potential use as anartificial remediation material.
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