| Popis: |
The influence of incomplete precipitation on the rate of sedimentation of magnesium hydroxide obtained from seawater, with the use of the flocculants, was studied. The study showed that incomplete precipitation of magnesium ions from seawater considerably affects the rate of sedimentation of magnesium hydroxide. The rate of sedimentation increased considerably and thus the capacity of the thickener was also increased. At a precipitation of 80 %, the capacity of the thickener increased by 86.5 % in relation to complete precipitation. Calculations were made according to Kync's theory. The above procedure leads to a substantial reduction in the content of calcium salt in the product, which can be explained by the low of adsorption, as set out by Paneth, Fajans and Hahn. |
