Why does tap water foam Why does tap water emit a lot of bubbles?

Tap water can foam for the following reasons:

1.Aging of water pipes: The inner wall of water pipes is prone to scale layers or dirt, which can cause the water to flow poorly and form bubbles, resulting in white foam.

2.Gas dissolution in water: Tap water contains gases such as oxygen, nitrogen, etc.

When tap water flows, the gases in the water form bubbles from the surface of the water, resulting in white foam. This phenomenon is more common when the water is flowing slowly, when there is a change in pressure, or when the water passes through the tap.

3.Chlorine added to tap water: Chlorine added to tap water is a measure to ensure water quality, but too much chlorine will cause white foam in tap water, which may contain higher concentrations of chlorine, which has certain hidden dangers in drinking water safety.

4.Climatic environment: Temperature changes can also have an impact on foam in tap water. When the temperature is low, the gas in the water will be easier to dissolve, and when the temperature is high, the gas in the water will escape more easily, forming more bubbles, resulting in white foam in the water.

5.Impurities in water: There may be some impurities in tap water, such as metal ions, organic substances, etc., which will cause the solubility of the gas in the water to change, produce bubbles, and form white foam.

Please note that these reasons are only one of the possible factors and need to be analyzed on a case-by-case basis. If you are concerned about the quality of tap water, please contact your local water company or relevant agencies for testing and treatment.

The foaming is due to the fact that chlorine is added to the tap water during treatment.

Sterilization, so when you turn on the faucet, when it is just released, especially when the faucet is turned on larger, there will be a lot of foam, which is the gas emitted. It's okay, you can drink it directly!

There are five reasons for this:

1. These bubbles are actually air, and they have no effect on water quality.

2. The boiler ** is because the air enters the water tank, and the pressure in the bucket changes when the lead is heated. However, domestic water heaters are equipped with pressure relief valves, and when the pressure reaches a certain height, the pressure relief valve will automatically open - when a small amount of air enters, although the water will blister, it is not a threat to the bucket, and the pressure does not reach the size of the starting pressure relief valve, so we can use it with confidence.

3. The air entering the bucket is caused by the fact that there is no outlet valve at the same time when the water is poured into the bucket for the first time.

4. Scale. If you let the cloudy hot water sit for a while, most of the water will become clear, and the bottom of the container will settle down, which is caused by limescale. The limescale itself is milky white and insoluble in water, so such limescale particles mixed with water will cause the water to turn white.

5. Hard water. The cloudy hot water will become clear and there will be no sedimentation at the bottom when it is left to sit for a while. If you go around the water and touch the inner wall of the container filled with water, you will feel slippery.

Strictly speaking, this is also a type of scale, but the scale at this time is not detached from metals such as heating rods, but scale that has just formed or has not yet formed in the water.

This is due to the harder water quality. In some places, the tap water quality is hard, and the content of calcium carbonate, magnesium carbonate or other salts is too high, reaching or approaching a saturated solution state, and the solubility of these waters decreases after boiling, forming a supersaturated solution, thereby precipitating and forming scale.

The solution is as follows: there are two main methods of water softening, one is chemical softening, which is to add some chemicals to the water, so as to convert the calcium and magnesium ions in the water into insoluble compounds and precipitate them. Soften with lime but to control the pH well, it is best between 9-10.

In addition, adding some vinegar to the water can also achieve the softening effect, which is to turn calcium into calcium acetate and dissolve it in water.

1. There are trace or even measured hydrophilic agents in the filtrate.

In order to ensure the permeability of water, the surface of the filter membrane must show hydrophilic properties, but the general membrane matrix is hydrophobic, so it is necessary to adopt a hydrophilic modifier for modification. General hydrophilic agents (protective solutions) have certain amphiphilic properties, and amphiphilic properties are conducive to the generation and stability of foam.

2. Purely physical phenomena.

When tap water is transported remotely under pressure through the tap water pipe network, the solubility of the gases in the pipe network and the gases in the atmosphere in the water increases under the action of pressure, and a large amount of it is dissolved in the tap water; When the tap water enters the pure water equipment, it must also be pressurized by the water pump to increase the power, and the water pump increases the pressure on the dissolved gas in the water body while pressurizing the water body, so that the gas molecules become smaller and the solubility is further increased.

3. The "whitening phenomenon" of tap water

Due to the pumping process of the water pump and the local water pipe maintenance process inhaled a certain amount of air, dissolved in the water under the action of pressure to form very fine bubbles, when the water pipe transports water, the water pressure and flow rate change greatly, resulting in a large number of tiny bubbles on the surface of the tap water flowing out of the faucet, the surface looks like a milky white turbidity, to stand for a few seconds after the bell is shouted, the bubbles disappear naturally, and the water becomes clear. This is a physical phenomenon that does not affect the water wheel wild. <>

The main reason is that the air dissolved in the water supply network is decomposed into tiny bubbles (invisible to the naked eye) by the action of pressure, and the tight arrangement of the bubbles will feel that the water flowing out is milky white, and when it is still in the container for a few minutes, the water will become clear as the bubbles disappear. This phenomenon does not affect the quality of tap water. Another reason is that the microorganisms of some secondary water supply tanks (boxes) exceed the standard, and bleaching powder is added to produce a slight white-gray color.

When the water is discharged, the color of the effluent is a slight whitish-gray color, and a slight pungent chlorine odor can be smelled, and after a few minutes of standing, there is a small amount of fine particle precipitation (usually not present). This phenomenon does not endanger human health.

However, if the chlorine smell is too large, but the chlorine in the water cannot be removed by heating, it is easy to produce carcinogens such as chloroform, and if the raw water is contaminated with organic matter, more organic carcinogens will be produced, in that case, it is generally recommended to purify it.

The tap water is definitely not clean, has impurities, or has added too much stuff, and the heating has reacted.

It is normal for water to bubble white, generally because the pressure of the water pound is too high, and it is recommended that the tap water should be boiled before eating.