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Environmental Science and Pollution Research

, Volume 25, Issue 36, pp 36173–36183 | Cite as

Modeling fully coupled hydraulic-mechanical-chemical processes in a natural clay liner under mechanical and chemico-osmotic consolidation

  • Zhihong Zhang
  • Shakil A. Masum
  • Hywel R. Thomas
  • Lin Han
Research Article
  • 41 Downloads

Abstract

Clayey material that possesses semipermeable membrane property may experience osmotic consolidation in presence of an osmotic gradient. In this paper, a fully coupled H-M-C model has been presented to study solute transport under the combined influence of mechanical and osmotic consolidations and vice versa. The model has been tested against the results of relevant importance and good agreements have been achieved. The model has been applied to investigate long-term solute transport behavior and consequent deformations/settlements in a natural clay liner. The results suggest, at early stages, solute transport is dominated by mechanical consolidation; however, physicochemical interaction associated with osmotic processes and osmotic consolidation dominates in the long term. Osmotic settlement shows decreasing trend past the maximum deformation of the clay liner indicating reduction of osmotic gradient across the semipermeable membrane. It is also evident that overall soil consolidation and transport of solute are affected by the concentration of the solute at the source or the injection boundary.

Keywords

Coupled Solute Transport Chemico-osmotic Mechanical consolidation Modeling 

Notes

Funding information

Zhihong Zhang is funded by the National Basic Research Program of China (No. 2014CB744702) and the National Natural Science Foundation of China (No. 51678012). Shakil A. Masum is supported by the Welsh Government and HEFCW through Ser Cymru National Research Network for Low Carbon, Energy and the Environment (NRN-LCEE) via Geo-Carb-Cymru Cluster. The financial supports are gratefully recognized.

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • Zhihong Zhang
    • 1
  • Shakil A. Masum
    • 2
  • Hywel R. Thomas
    • 2
  • Lin Han
    • 1
  1. 1.Key Laboratory of Urban Security & Disaster Engineering, Ministry of EducationBeijing University of TechnologyBeijingPeople’s Republic of China
  2. 2.Geoenvironmental Research CentreCardiff UniversityCardiffUK

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