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Related Experiment Video

Updated: Feb 5, 2026

Resource Recycling of Red Soil to Synthesize Fe2O3/FAU-type Zeolite Composite Material for Heavy Metal Removal
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Stabilized red soil-an efficient liner system for landfills containing hazardous materials.

R Gopinath1, R Poopathi2, M Vasanthavigar3

  • 1Department of Civil Engineering, University College of Engineering, Tindivanam, Tamil Nadu, 604001, India. gopinathrudramurthy@gmail.com.

Environmental Monitoring and Assessment
|September 16, 2018
PubMed
Summary

Stabilized red soil with lime and Prosopis juliflora fibers offers an eco-friendly solution for landfill liners. This composite material effectively reduces permeability and enhances strength, preventing aquifer contamination.

Keywords:
CBRLimeProsopis julifloraRed soilUCC

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Area of Science:

  • Geotechnical Engineering
  • Environmental Engineering
  • Materials Science

Background:

  • Hazardous waste disposal in landfills poses risks of leachate contamination.
  • Efficient and economical landfill liner systems are crucial for environmental protection.
  • Locally available materials are sought for sustainable engineering solutions.

Purpose of the Study:

  • To evaluate the suitability of red soil stabilized with lime and Prosopis juliflora fibers as a landfill liner material.
  • To investigate the geotechnical properties of the stabilized soil composite.
  • To assess the performance of a landfill liner system incorporating the stabilized red soil.

Main Methods:

  • Red soil was stabilized with varying percentages of Prosopis juliflora fibers (0.0-1.0%) and a constant 4% lime content.
  • Geotechnical tests including plasticity, unconfined compressive strength (UCC), consolidation, permeability, and California Bearing Ratio (CBR) were conducted.
  • Scanning Electron Microscopy (SEM) was used to analyze the microstructure of the stabilized soil.
  • A landfill liner system was modeled using Visual MODFLOW to simulate performance.

Main Results:

  • Stabilization significantly decreased plasticity index, consolidation settlement, permeability, and shrinkage.
  • Unconfined compressive strength (UCC) and CBR resistance increased with fiber addition.
  • SEM images showed good bonding between lime hydration products and fibers, enhancing stress transfer.
  • Visual MODFLOW simulations indicated the stabilized red soil liner effectively prevented aquifer contamination.

Conclusions:

  • Red soil stabilized with lime and Prosopis juliflora fibers exhibits desirable geotechnical properties for landfill liner applications.
  • The stabilized soil composite offers an economical and sustainable alternative to traditional liner materials.
  • The proposed composite liner system demonstrates effective containment of leachate, protecting groundwater resources.