Phenylphosphonic acid was imbedded into the matrix of the polyurethane
foam during the fabrication process of the polymer. The extraction of
uranium by phosphonic acid-imbedded polyurethane foam and blank polyu
rethane (i.e., foam without phosphonic acid functional groups) was inv
estigated. Phosphonic acid-imbedded foam showed superior extractabilit
y of uranium from solutions with pH = 7.0 +/- 1.5 over a wide range of
temperature. (C) 1997 Elsevier Science B.V.