Clay/polymer blend as high pH or ionic liquid barrier

摘要

A composition capable of increased impermeability against the passage of ionic liquids therethrough can include a clay mixed with an anionic and cationic polymer. Such compositions can be provided in geosynthetic liners to provide a hydraulic barrier in aggressive leachate environments.

主权项

1. A composition capable of increased impermeability against the passage of ionic liquids therethrough comprising clay mixed with a polymer component,
the polymer component being
a combination of about 0.2 to 20 wt. % anionic polymer and about 0.2 to 20 wt. % cationic polymer;orone or more charged polymer(s), each charged polymer comprising a combination of anionic and cationic charge sites, where the charged polymer(s) are present at an amount such that the constituent monomer(s) comprising charge sites comprises 0.2 to 20 wt. % of the composition;ora combination of
at least one cationic polymer, at least one anionic polymer, or at least one cationic polymer and at least one anionic polymer,andone or more charged polymer(s), each charged polymer comprising a combination of anionic and cationic charge sites, where the charged polymer(s) are present at an amount such that the constituent monomer(s) comprising charge sites comprises 0.2 to 20 wt. % of the composition; wherein a negative to positive charge balance of the polymer component is about 2:4 to about 1:1.