Premium
Immobilization of spent ion‐exchange resins in the urea‐formaldehyde matrix
Author(s) -
Rao S. V. S,
Kothandaraman H.,
Sudhakar M.,
Lal K. B.,
Amalraj R. V.
Publication year - 1994
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1994.070520911
Subject(s) - boric acid , urea formaldehyde , formaldehyde , matrix (chemical analysis) , urea , ion exchange , ion exchange resin , chemistry , nuclear chemistry , compressive strength , catalysis , materials science , polymer chemistry , chemical engineering , ion , composite material , inorganic chemistry , organic chemistry , adhesive , layer (electronics) , engineering
Studies have been carried out on the immobilization of spent ion‐exchange resins produced in nuclear power plants in urea‐formaldehyde matrix. The matrices were prepared by incorporating different types of ion‐exchange resins in the pH range of 4.5 to 5.0, using boric acid as a catalyst. Characterization of the matrices was carried out with respect to dimensional changes, compressive strength, and leach resistance. The cumulative percentage weight loss and volume change were observed to decrease with the increase in boric acid concentration before attaining a plateau. The diffusion coefficients were in the order of 10 −16 M/s, and the compressive strengths were in the range of 0.83 to 12 MPa. Infrared spectral studies on the urea‐formaldehyde matrices revealed that the rate and the extent of cure depended on the type of resin. © 1994 John Wiley & Sons, Inc.