MECHANISMS OF INTERACTION BETWEEN BENTONITE AND ANIONIC POLYMERS IN ENHANCED GEOSYNTHETIC CLAY LINERS
Polymer enhanced bentonites (EBs) are a potential solution to the chemical incompatibility of natural bentonite in many containment applications. Relative to conventional (natural or un-enhanced) bentonites, EBs have shown improved (lower) hydraulic conductivity to high strength waste liquids, but the mechanisms underlying these improvements are not well understood. The EB geosynthetic clay liners (EB-GCLs) evaluated in this study were produced with linear anionic polymers poly(acrylic acid) (PA) and sodium carboxymethylcellulose (CMC), as well as a covalently crosslinked PA (PAx), using multiple ...
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