Preparation of Magnesium Sulfate salt MgSO4 from Seawater
Abstract
In this research, magnesium sulphate salt was prepared from seawater in a new, economically feasible method. The method relied on direct precipitation of magnesium hydroxide using sodium hydroxide and subsequent treatment with concentrated sulfuric acid only to obtain magnesium sulphate, in addition to the traditional method based on precipitation with ethanol.
Marine water samples were collected from several areas along the coast of Latakia city ( estuary of the Northern Kabir River, Higher Institute for Marine Research, Sports City) during the summer of 2023.
The results showed that the average amount of magnesium sulphate salt produced according to the traditional method (precipitation with ethanol) was: 3.82 g/L, 3.27, and 2.13 in the research areas, the sports city, and the mouth, respectively, while the average amounts of salt produced according to the new method were as follows: 7.91 g\L, 6.65, 4.56 in the previous regions, respectively. Several tests were also carried out to study some of the physical properties of the resulting magnesium sulphate salt (solubility, melting point) and compare them with reference values. The results showed that these properties were identical.
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