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Vertical Barriers for Land Contamination Containment: A Review
Benyi Cao1,2, Jian Xu1, Fei Wang3
1State Environmental Protection Key Laboratory of Soil Environmental Management and Pollution Control, Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment of China, Nanjing 210042, China.
International Journal of Environmental Research and Public Health
|December 10, 2021
Summary
Vertical barriers like slurry trench walls effectively control groundwater and contaminants, crucial for soil pollution remediation. This review assesses barrier materials, durability, and future innovations for resilient environmental solutions.
Area of Science:
- Environmental Science
- Geotechnical Engineering
- Soil Remediation
Background:
- Soil pollution poses significant environmental threats, impacting vital soil ecosystem services.
- Vertical barriers are established methods for managing groundwater flow and subsurface contaminant transport.
- Key barrier types include soil-bentonite, cement-bentonite, and soil mix technologies.
Purpose of the Study:
- To comprehensively review and assess materials, properties, and performance of vertical barriers for soil pollution control.
- To compare the engineering properties and mix designs of different barrier types.
- To discuss barrier material durability under various stresses and document successful remediation projects.
Main Methods:
- Literature review and comparative assessment of soil-bentonite, cement-bentonite, and soil mix barrier properties.
- Analysis of material damage and durability under mechanical, chemical, and environmental stresses.
- Documentation and analysis of landmark remediation projects utilizing barrier systems.
Main Results:
- Summarized and compared typical materials, mechanical, and permeability properties of key vertical barrier types.
- Discussed the susceptibility of barrier materials to damage and assessed their long-term durability.
- Demonstrated the effectiveness of barrier systems through case studies of remediation projects.
Conclusions:
- Vertical barriers are effective in controlling soil pollution and contaminant transport.
- Further research is needed on crack-resistant, self-healing materials and non-destructive monitoring techniques.
- Optimizing resilient barrier materials and employing geophysical monitoring are key future directions for environmental remediation.
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