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Crosslinking induced by irradiation raises selectivity of polymeric adsorbent
Author(s) -
Ma Hongjuan,
Hoshina Hiroyuki,
Seko Noriaki
Publication year - 2012
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.38428
Subject(s) - adsorption , selectivity , ethylenediamine , sorption , polymerization , scanning electron microscope , materials science , amine gas treating , nuclear chemistry , irradiation , chemical engineering , polymer chemistry , polymer , chemistry , inorganic chemistry , organic chemistry , composite material , catalysis , physics , nuclear physics , engineering
Amine‐type adsorbents were prepared by radiation‐induced graft polymerization. The sorption behaviors for an individual metal ion of Cu 2+ and Pb 2+ separately, as well as with mixed Cu 2+ /Pb 2+, were studied in both column and batch mode. Ethylenediamine‐type adsorbent exhibited a high capacity for Cu 2+ and Pb 2+ at a high flow rate of 1000 h −1 , but low selectivity in the mixed Cu 2+ /Pb 2+ solutions. Radiation‐induced crosslinking of the amine‐type adsorbent was performed in water to improve selectivity. Crosslinking of the material was demonstrated by gel fraction, water content, and scanning electron microscopy image. Compared with the results from the noncrosslinked adsorbents, the breakthrough curve of Cu 2+ right shifted, whereas the breakthrough curve of Pb 2+ left shifted, indicating the higher adsorption capacity of Cu 2+ and the lower adsorption capacity of Pb 2+ from the crosslinked adsorbent. After 300 kGy irradiation, the crosslinked adsorbent was found to selectively adsorb Cu 2+ from the mixed Cu 2+ /Pb 2+ solution. The results revealed that crosslinking raised the selectivity of the adsorbents. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013