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Separation of Chromium(III) and Chromium(VI) by Carboxymethylated Polyamine-Polyurea Resin Column
Analytical Science and Technology / Analytical Science and Technology, (P)1225-0163; (E)2288-8985
1994, v.7 no.2, pp.205-211
Chung,
Y. S., Lee,
K. W., Hwang,
J. Y., &
Lee,
Y.
M.
(1994). Separation of Chromium(III) and Chromium(VI) by Carboxymethylated Polyamine-Polyurea Resin Column. Analytical Science and Technology, 7(2), 205-211.
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Abstract
Acetic acid and succinic acid bonded polyamine-polyurea(CPPI and SAPPI) resins were synthesized from the reaction of polyethylenimine-polymethylenepolyphenylene isocyanate(PPI) resin as matrix polymer and chloroacetic acid and chlorosuccinic acid respectively. These resins were confirmed with infrared spectrometry and elemental analysis. The adsorption characteristics of the chromium(III) and dichromate(or chromate) ions on the resins were studied by measuring distribution coefficients(<TEX>$K_d$</TEX>) with changing pH of the solution. It was thought that these ions were adsorbed by ion exchange mechanism. Chromium(III) and dichromate ion could be separated with stepwise elution method by changing pH of the eluent using SAPPI resin packed column(<TEX>$0.6cm(i.\;d.){\times}10cm(L.)$</TEX>). Also, dichromate ion could be preconecntrated with CPPI resin column by a concentration factor of 50.
- keywords
- Succinic acid, carboxymethylated polyamine-polyurea resin, chelating resin, separation of chromium(III) and chromium(VI)
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