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Study of nitric acid leachout characteristics from weak base anion exchanger to maintain a specified pH regime during Gd(NO 3 ) 3 removal from moderator system of 540 MWe PHWRs
Author(s) -
Tripathi V. S.,
Balaji V.,
Venkateswaran G.,
Dash S. C.
Publication year - 2009
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.20226
Subject(s) - nitric acid , chemistry , base (topology) , ion exchange , anion exchanger , weak base , ion , chromatography , inorganic chemistry , analytical chemistry (journal) , mathematics , organic chemistry , mathematical analysis
Nitric acid leachout characteristics from weak base anion exchanger (WBA) have been experimentally evaluated as a function of total nitric acid loading at a given flow velocity. An empirical first order model is used to explain the column outlet behaviour. Based on the experimental evaluation, a column configuration of a strong acid cation exchanger (SAC) topped mixed bed of SAC and WBA followed by a 5% nitric acid loaded WBA as the bottom layer of the column has been used to remove Gd(NO 3 ) 3 from water while maintaining the column outlet pH in the range of 5.0–5.5.