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http://dx.doi.org/10.12925/jkocs.2016.33.4.795

A Study on the Nitrate Removal in Water by Chelating Bond of Calcium Alginate  

Kim, Tae Kyeong (Division of Civil, Environmental and Chemical Engineering, Changwon National University)
Song, Ju Young (Division of Civil, Environmental and Chemical Engineering, Changwon National University)
Kim, Jong Hwa (Division of Civil, Environmental and Chemical Engineering, Changwon National University)
Publication Information
Journal of the Korean Applied Science and Technology / v.33, no.4, 2016 , pp. 795-801 More about this Journal
Abstract
This study is on the denitrification process using the sodium alginate and $CaCl_2$ as a flocculant. Removal techniques of nitrate nitrogen from waste water are reverse osmosis, ion exchange, electro dialysis and biological method etc. We tried to remove nitrate nitrogen with flocculation and sedimentation method in the present study. Calcium alginate is expected to form a chelate bond with nitrate nitrogen in the solution. So the effects of flocculantt component, flocculation reaction time, molar ratio of the flocculant, flocculant injection rate are studied to determine the best removal rate of nitrate nitrogen. In addition, we tried to determine the nitrate nitrogen removal mechanism by analyzing the structure and component ratio of the configuration after the agglutination precipitate by FE-SEM and EDS. As a result, the nitrate nitrogen removal mechanism is turned out to form calcium-nitro-alginate, and the best mole ratio of flocculating agent is 1 : 1, the injection rate of the flocculant was up to 2%, the removal rate of the nitrate nitrogen to be 56.7% in the synthetic wastewater.
Keywords
Calcium alginate; Nitrate nitrogen; Chelate bond; Flocculation and sedimention;
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Times Cited By KSCI : 10  (Citation Analysis)
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