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Removal of trace quantities of nickel from solution
Author(s) -
Randall J. M.,
Randall V. G.,
McDonald G. M.,
Young R. N.,
Masri M. S.
Publication year - 1979
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.1979.070230307
Subject(s) - nickel , chitosan , sorption , substrate (aquarium) , scavenger , nuclear chemistry , ion exchange , atomic absorption spectroscopy , chemistry , materials science , ion , adsorption , organic chemistry , radical , oceanography , physics , quantum mechanics , geology
Chitosan, which is produced from the natural polymer chitin, is a much more efficient scavenger of nickel ion than other natural ion exchange materials tested. An industrial waste containing about 7 ppm Ni 2+ and 10,000 ppm Na + was reduced to less than 0.1 ppm Ni 2+ by contact in a packed column of chitosan. Capacity of the chitosan substrate under these conditions was a little more than 1 meq/g. The substrate can be regenerated by contact with buffered NH 4 Cl at pH 10. The high sodium content of the nickel waste did not prevent sorption of Ni 2+ , but it apparently produced an interference with atomic absorption spectrophotometer analyses, giving a spurious reading of 0.8 ppm Ni 2+ when the major nickel line at 232 nm was used for analysis.