How To Make Drinking Water from Seawater?

Last Updated on March 31, 2015 by Malik Waqas


The desalination of the seawater is the removal of the salt called sodium chloride, numerous other ions and minerals to make this water drinkable for human beings and several other purposes as well.

Introduction of latest technique for desalination of seawater

The international groups of the chemists from the University of Texas at Austin (UT) and the University of Marburg in Germany have introduced a new technique for the desalination of the seawater that uses less energy. It is considerably simpler and easier than the traditional techniques. Once this process is done, the desalinated ocean water can be used for drinking or for the irrigation of the crops. While the other techniques of desalination include the membranes that are used as a filter. But the membranes could be expensive. That is why this approach has been adopted.

The Importance of new electronic Chip

The need of the drinking water is increasing day by day. This necessity cannot be denied. According to the research of the Yale University and the University of Notre Dame, due to the rising needs of the fresh drinking water, it would be limited in the near future so the desalination could play a very important role in this regard. The drinking and crop irrigation water is the very basic need for improving and maintaining the human health. Hence this new technique is necessary to be used. This technique uses the chip to make a small electrical field that helps in removing the salts from the seawater; it requires little energy and can run on a backup store battery. Therefore this technique is called electrochemically mediated seawater desalination, due to the utilization of electronic chip. The chip enclosed a micro channel that has two branches. At the joint of the channel there is an implanted electrode that neutralizes some chloride ions which are present in the seawater. This creates an “ion depletion zone”.

How the chip works?

The plastic chip separates the salt from the water and directs it into different path. A small amount of the voltage (3.0 volts) is required to separate water and salt. The salt water passes away through the chip, and then a little amount of the voltage is used that neutralizes the chloride ions present in the salt water. As a result it creates and ion depletion zone that enhances the pressure of the electricity in that particular area. When the water reaches in this depletion zone the Salt take apart from the water, this zone sends the salt towards one channel and the fresh water towards another.


Currently the micro channels of this water chip produce nearly 40 nano liters of the desalted water per minute. However the scientists are convinced that the process could really make it more practical to produce many liters of the water every day.

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