Characterization of dolomitic lime as based reagent for the precipitation Mg(OH)2 from seawater (CROSBI ID 225078)
Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Jakić, Jelena ; Labor, Miroslav ; Martinac, Vanja
engleski
Characterization of dolomitic lime as based reagent for the precipitation Mg(OH)2 from seawater
The process of obtaining magnesium hydroxide from seawater involves precipitation of magnesium ions with suitable basic reagents, such as calcined dolomite. The purity of the magnesium hydroxide precipitate depends on dolomite characteristics ; therefore, it is necessary to find high purity dolomite with good physical properties. The aim of this study was to characterize the specific dolomite from the location of Đipalo-Sinj (Croatia), its quality, and the favourable conditions for calcination. Certain physical and chemical characteristics were determined by pure chemical analysis, as well as by using TG/DTG-DTA, FTIR and SEM/EDS analysis. Good chemical quality of dolomitic lime (59.03 wt. % CaO, and 40.69 wt. % MgO) with low content of impurities was confirmed with the TG/DTG-DTA thermal analysis. In the atmosphere of air + CO2, dolomite decomposes to CaCO3 and MgO in a temperature area between 415 and 824 °C ; thereafter, another reaction begins – the decomposition reaction of calcium carbonate, completed at 897 °C. In air, the simultaneous decomposition of two carbonates occurs between 657 – 840 °C. The FTIR and EDS analyses confirmed the complete breakdown of carbonates at 950 °C. The main components (Mg, Ca, and O) confirmed the purity of the dolomite lime.
dolomitic lime ; Mg(OH)2 ; seawater ; TG/DTG-DTA ; FTIR ; SEM/EDS
Glavni autor: Jelena Jakić
nije evidentirano
nije evidentirano
nije evidentirano
nije evidentirano
nije evidentirano
Podaci o izdanju
30 (3)
2016.
373-379
objavljeno
0352-9568
10.15255/CABEQ.2015.2325