| Fulltext PDF | Citation RIS |
Removal of nitrate/nitrite ions by modified with metal-containing compounds strongly basic exchanger using response surface methodology
Authors: V. Gutsanu and V. Bulicanu
| Affiliation: | Moldova State University. Department of inorganic and physical chemistry. 60 Mateevici str. Chisinau, MD 2009, Moldova |
Published in:
Ion Exch. Lett. 2013,
7(1-2), 1-5
Permanent link to this page: http://iel.vscht.cz/abstracts/1803-4039-07-0001.htm
License:
Keywords: strongly basic anion exchanger; nitrate/nitrite ions removal; response surface methodology; Cr(III)-containing polymer
Abstract: The article demonstrates that strongly basic anion exchanger modified with Cr(III)-containing compounds are able to selective removal of nitrate/nitrite ions from liquids. The influencing of NaNO3, KCl, Na2SO4 and NaHCO3 concentration, pH and filtration speed on the parameters of nitrate /nitrite removal process was investigated using response surface methodology. Removal of nitrate ions from solution was carried out under dynamic conditions after reduction with metallic Cd. Carboxylic exchanger was used for the selective sorption of Cd2+ (and Cr3+ ions that could possibly come out of the polymer phase) cations. Were obtained regression equations for sorption capacity until the appearance of nitrites/nitrates ions in the filtrate and total sorption capacity of the sorbent. As a result of optimization, using the method of moving on the gradient , parameters of nitrate ions removing process were improved considerably.