Journal
DESALINATION AND WATER TREATMENT
Volume 51, Issue 4-6, Pages 924-929Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/19443994.2012.707375
Keywords
Desalinated water; Hardening; Magnesium; Magnesia dissolution; Kinetic model
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A simple easily controlled technique for adding Mg2+ ions to desalinated water is described. The Israeli Health Authority recommendation of adding of 20-30 mg/L of Mg2+ can be readily met by dissolution of magnesia pellets in a packed bed column. Experimental data are presented showing the effects of the specific flow velocity and CO2 acidification of the inlet desalinated water on the Mg2+ concentration in the product stream leaving the column. Acidification of the inlet feed water is shown to enhance considerably the dissolution process. A kinetic expression is presented enabling full design of a dissolution packed column with nonacidified water.
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