Why is there so much dust in tap water?

A layer of things on the surface should be rich in metasilicic acid in the water to form magnesium silicate and calcium silicate when boiling, this mineral is not soluble in water even after boiling, but becomes a hollow tiny particle floating on the water surface, forming a white float on the surface of the water, which is harmless to the human body. The sand-like thing inside the pot is limescale, and the main ingredients are calcium carbonate and magnesium carbonate; After the water is boiled, the original dissolved calcium bicarbonate and magnesium bicarbonate decompose in the boiling water, release carbon dioxide, and become insoluble calcium carbonate and magnesium carbonate (they are the main components of limestone and dolomite) also precipitate, which is the origin of scale. Additional Information:

Scale is harmful to the human body, scale is mixed in the water of heavy metals, calcium salts, dust, germs, insect eggs and corpses and other precipitation, not only unhygienic, but also seriously affect the health of the human body. According to chemical analysis, there are a large number of heavy metals in scale, and it has been proved that scale can not only cause a variety of stone diseases, but also cause diseases of digestive, nervous, urinary, hematopoietic, circulatory and other systems and cause aging. Long-term ingestion can cause heavy metal poisoning in the human body, and many heavy metals can cause cancer in human organs.

Something like dust in tap water generally does not appear, and in such a situation, it may be that the turbidity of tap water is a problem with groundwater, and there is a problem with the water pipe, which should be checked by a professional as soon as possible.

When the tap water comes out of the water plant, there is no dust, because the turbidity of the tap water is a national standard, and the water that can see the dust is definitely unqualified water.

So, why are there sometimes visible impurities or floating debris in tap water? This condition is called secondary pollution.

That is to say, the water that was originally very clean, when it came out of the waterworks, was not bad, and it has reached the national standard, but due to:

First, the transmission and distribution pipelines are old, with residues and bacteria;

Second, the secondary pollution of the intermediate water tank is generally serious.

According to Shanghai's statistics, there are 70,000 intermediate water tanks in the city, which have been exposed to the air for a long time, with poor sealing and poor management, and many of them contain microorganisms, rust and even insects.

There are so many dust-like things in the tap water, which means that the groundwater in this place is polluted. Wish.

There may be a leak in the water pipe, which causes the sediment to mix in, and you can call ** to report to the water company.

Because the tap water is filled with disinfectant, such as bleaching powder, and that, that's why there is that kind of ash-like dong.

In this case, there are some impurities and floating objects after the tap water is boiled, this is a normal situation, don't worry, you can let the water stand for a while before drinking, if you are really not at ease, install a filter, drink the filtered water, and usually develop the habit of drinking more water.

Because the tap water has passed through the sewage treatment equipment, it has been purified enough to reach thousands of households, but it has not yet reached the standard of drinking water, so it cannot be drunk directly!

There are also impurities in tap water.

There are five categories of impurities in tap water.

1. Particulate matter: inorganic and organic impurities that are insoluble more than 10 m in water (of which more than 40 m are visible to the naked eye), such as sediment, metal oxides or hydroxides that are often found in tap water.

2. Ionic substances: refers to substances that dissociate into anion and cation after being dissolved in water, and the sum of anion and cation in water is called the salt content of water. If the content of iron and manganese (Fe2+, Mn2+) in the water exceeds the standard (>, the iron and manganese ions should be removed through a manganese sand filter or aeration device, otherwise an irremovable sedimentary fouling will be formed on the RO film.

3. Colloid: According to the size, colloidal is a substance between ions and particulate matter, and its size is in, usually negatively charged, and it is easy to combine with organic substances.

4. Gas: some gases such as O2, CO2, NH3, N2 are soluble in water, and some acid ions are formed after reaction in water, which affects the quality of the finished water. If ultrapure water is left in the air, the quality of the water will deteriorate rapidly.

5. Disinfectant: After the raw water is treated by the water company, there will be disinfectants such as sodium hypochlorite left in the water, and the residual chlorine is a strong oxidizing substance that has a considerable destructive effect on the RO membrane, so the residual chlorine should be filtered out by the activated carbon unit. It can increase the water yield of the RO membrane and reduce the desalination rate.

That layer of white stuff is limescale. The water is still drinkable, but it is better not to drink such water for a long time.

Extended Information:1The main components of limescale are calcium carbonate and magnesium carbonate. The boiler that boils water should be regularly removed from the scale, because the scale affects the heat transfer, the scale is too much, and the boiler may be caused by uneven local heating.

The scale in the water bottle gut also affects the thermal insulation performance of the water bottle. Since acetic acid is more acidic than carbonic acid, in the home, limescale can be removed with vinegar.

2.Most of the water in nature will produce this kind of substance after heating, strictly speaking, scale is harmful to the human body, but it is definitely acceptable to the human body, and will not cause any specific harm. However, the scale that has been formed for a long time contains a lot of sediment, and is accompanied by trace metal elements produced in the boiling water container, including heavy metals such as lead, zinc, arsenic, etc., which is harmful to the human body, but it will not be as alarmist as some water purifier advertisements say!

It is harmful to use the kettle for a long time without cleaning it for a long time, and it is not a big problem to clean the kettle frequently, just use vinegar!

What is the white "floater" in the water after boiling the water, and can you drink it? Tell you the trick to remove.

You can drink it.

After the tap water is boiled, the white floating matter is the crystallization of calcium and magnesium ions.

Tap water and well water contain calcium and magnesium ions to varying degrees. At room temperature, these ions are dissolved in water, and when the water is boiled, calcium and magnesium ions precipitate, and crystalline white floats on top of the water. These calcium and magnesium ions dissolved in water cannot be filtered out at room temperature, and the white floating matter formed is not harmful to the human body.

It is calcification, which means that the water quality is hard, generally speaking, it doesn't matter if you drink a little, just blow off a layer and drink it again.

Judging from the floating objects on the **, it should not be the water itself, it may be something on the pot where the water is boiled or something that falls elsewhere, re-burn it again to see if there is anything left.