| A lot of this is possible already but not economical as most of the process to extract minerals from sea water require a lot of energy/electricity where as it is extremely cheap comparable to mine them directly. But free energy electricity would change that. Metals that can be extracted from seawater include: Sodium (Na): One of the most common metals found in seawater, sodium can be extracted through solar evaporation or electrolysis. Magnesium (Mg): A metal that can be extracted from seawater. Calcium (Ca): A metal that can be extracted from seawater. Potassium (K): A metal that can be extracted from seawater. Lithium: A metal that may become more important in the future as demand for lithium batteries and fusion energy increases. Copper: A high-value metal that is often present in seawater. Nickel: A high-value metal that is often present in seawater. Cobalt: A high-value metal that is often present in seawater. |