Sources of silicon, aluminum, and strontium in seawater
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Currently, raw salt is used in various ways. Analysis of the secondary brine shows significant variations in silicon, aluminum, and strontium levels. Let’s discuss the sources of silicon, aluminum, and strontium as well as methods for sample control
The contents of various elements in the Earth’s crust, in descending order, are oxygen, silicon, aluminum, iron, calcium, sodium, potassium, and magnesium. The percentages are as follows: oxygen 48.06%, silicon 26.30%, aluminum 7.73%, iron 4.75%, calcium 3.45%, sodium 2.74%, potassium 2.47%, magnesium 2.00%, hydrogen 0.76%, and others 0.76%. Salts originate from the Earth’s crust
For normal crude salt, it is sufficient to control several indicators specified in national standards such as calcium, magnesium, sulfate, and salt content; without analyzing the other parameters, problems with the quality of the secondary brine generally do not arise. However, the processes used in each salt production facility, or the quality of the materials added during these processes, vary; as a result, some manufacturers experience excessive levels of elements such as silicon, aluminum, strontium, and nickel. In particular, soluble forms of silicon and aluminum are difficult to remove. . I would like to ask the moderator: are there specific requirements for the levels of zinc and aluminum in raw salt?