Bentonite Liner
nounPronunciation: /bɛnˈtoʊnaɪt ˈlaɪnər/
A compacted clay layer composed primarily of montmorillonite minerals, installed beneath or within waste containment structures to minimize water percolation and contaminant migration. Bentonite's low hydraulic conductivity makes it an effective barrier in tailings facilities and waste rock piles.
Plain English
A clay barrier layer that prevents water and contaminants from seeping through mine waste.
Etymology & History
Usage
"The reclaimed tailings pond was sealed with a two-foot bentonite liner to prevent acid mine drainage from contaminating groundwater."
Style guide notes: Use 'bentonite liner' or 'bentonite layer' consistently; specify clay type if relevant to discussion.
Also known as
Contrasted with
Related Terms
Frequently Asked Questions
Why use bentonite liners in mine reclamation?
Bentonite's low hydraulic conductivity effectively blocks water and contaminant movement through waste structures.
How thick should a bentonite liner be?
Typical bentonite liners range from 1-3 feet thick, depending on site-specific contamination risk and regulatory requirements.
Why Test Candidates on This?
Important for site design and engineering specifications in mine closure and remediation projects.
Required skill level: Mid