Water osmosis is a natural process based on the movement of water molecules through a semipermeable membrane, from a solution with a lower concentration of solutes to one with a higher concentration. This phenomenon seeks to balance the concentrations of both solutions. This process is widely used in water purification and filtration systems, such as reverse osmosis, to improve the quality of drinking water in many homes. However, there are numerous other applications related to water osmosis and reverse osmosis filtration systems. Myths that generate confusion.
In this article, we are going to debunk some of these myths, explain the true characteristics of osmosis and its applications, as well as its advantages and disadvantages. Read on to learn more about this water purification technique!
What is the osmosis filter used for?
The use of reverse osmosis filtration devices has grown in popularity, especially in regions where tap water has an unpleasant taste due to hardness, or the amount of dissolved minerals such as calcium and magnesium, or chlorine treatment. These devices promise to remove these impurities and significantly improve the quality and taste of water.
However, it is crucial to note that Reverse osmosis equipment is not always as effective as advertised. In fact, in some cases they can even worsen water quality or generate water waste in the process.
Domestic reverse osmosis systems are typically used to filter tap water, removing dissolved solids, chlorine, salts and other particles. But they are not suitable for all water sources. A water quality analysis is vital before deciding to install such a system.
Osmosis process in the water filter
The principle of reverse osmosis can be simplified to the idea of allowing only water molecules to pass through a semipermeable membrane, while impurities such as salts and minerals are trapped. Although the process is more technical than simple filtration, this basic concept gives a general idea of how it works.
The osmosis filtration process is often divided into several stages or phases. In a typical five-stage system, which is very common, the first filters are responsible for removing larger particles before the water comes into contact with the osmosis membrane.
- The first stage consists of a sediment filter that removes particles such as sand and lime grains that could cause problems in later stages.
- In the second and third stages, activated carbon filters are used to remove chlorine and other compounds that affect the taste and odor of the water. Activated carbon is very effective at removing chlorine, which is a common component in tap water.
- The fourth stage is the osmosis membrane itself, which removes most of the dissolved solids, including salts and microscopic impurities.
- Finally, the processed water undergoes a final step through a small activated carbon filter to further improve its flavor.
On some models, a storage tank to retain the filtered water, making it available for immediate use. However, there are more advanced systems that eliminate the need for such a tank, saving space in the kitchen.
Myths of water osmosis
Many myths have arisen around the osmosis process and reverse osmosis systems. Below, we will review some of the most common ones and debunk them based on the scientific and technical evidence available.
Myth 1: Reverse osmosis water is completely pure
This is one of the most common myths. Although reverse osmosis systems remove a large amount of impurities, They fail to create “100% pure” water. Some elements and compounds, such as gases dissolved in water, may still be present in very small concentrations.
Myth 2: Drinking reverse osmosis water is bad for your health
Another popular myth is that drinking reverse osmosis water could be harmful due to the lack of minerals. However, this is not true. For healthy people, drinking water with low amounts of minerals does not pose any significant risk. In addition, the body obtains most of the necessary minerals through food.
Myth 3: Reverse osmosis water does not have enough calcium and magnesium
Some argue that reverse osmosis removes minerals such as calcium and magnesium, which are essential for the body. While it is true that the process reduces them, Water is not the only source of these minerals. A balanced daily diet provides sufficient amounts of calcium and magnesium.
Myth 4: Only a small amount of water is lost during reverse osmosis
One of the most significant problems with reverse osmosis systems is the waste of waterDepending on the model, for every litre of filtered water, between 3 and 10 litres can be discarded. Although some manufacturers claim a 1:4 ratio, in practice, this is very difficult to achieve without very advanced equipment.
Myth 5: Reverse osmosis water is healthier than bottled water
Although reverse osmosis filtered water may be of high quality, it is not necessarily healthier than good quality bottled water. Both types of water can meet potable standards., and the best option will largely depend on the available water source and the needs of the consumer.
Myth 6: All reverse osmosis systems are the same
Reverse osmosis systems vary considerably in quality, efficiency and level of filtration. Some equipment may be more advanced than others, offering features such as automatic cleaning systems or greater energy efficiency. It is essential to know the characteristics of the different models before making a purchase.
Is it advisable to use a reverse osmosis system?
The answer depends mainly on the quality of the water that reaches your home. In some places, reverse osmosis can be an excellent solution to improve the quality of tap water, especially if it contains a lot of mineral salts, chlorine or possible contaminants. However, in other areas where the water is already of good quality, a reverse osmosis system may not be necessary.
Advantages of using reverse osmosis
- Removes impurities such as nitrates, sulfates, heavy metals and pesticides from water.
- Improves the taste of water by removing chlorine and other undesirable compounds.
- You can save money in the long run by stopping buying bottled water.
Disadvantages of using reverse osmosis
- Water waste: For every litre of filtered water, between 3 and 10 litres can be discarded.
- The system requires periodic maintenance, such as changing filter cartridges.
- The water may be low in minerals, although this is not harmful to most people.
Although reverse osmosis systems can be useful in specific situations, they are not indispensable for all homes. Before installing one, it is advisable to analyze the quality of your water and evaluate whether this technology is really necessary in your case. In addition, you must take into account disadvantages such as water waste and the maintenance required.