Why is there a white sediment after the tap water is boiled

The white float (or sediment) in the water is commonly known as scale, and its main component is calcium carbonate.

Magnesium carbonate. After the water is boiled, if there are white floaters, do not drink them immediately, you must wait until the white floats are precipitated and filtered before drinking, so that it will be better for the body, because these white floaters cannot be drunk into the body, otherwise it will cause too much calcium in the body, resulting in stones.

There are also symptoms that do not drink the water that has just been boiled, which will damage the intestines.

After the tap water is boiled, the white precipitate in the water bottle is calcium carbonate and magnesium carbonate, which are generated by the heating and decomposition of a small amount of water-soluble calcium bicarbonate and magnesium bicarbonate contained in tap water, which is harmless to the human body. In order to avoid scaling in the thermos, you can add a section of old loofah pulp to the kettle, and the scale will form on the loofah, and the loofah pulp can be used repeatedly after regular scrubbing.

The water quality is hard. Hard water.

The minerals are numerous.

After boiling, the minerals form polymeric deposits at high temperatures.

And so it was. White precipitate.

Most of the sediments are magnesium, calcium, iron and other substances, which are harmless. Don't worry. However, it is not recommended to drink it, after all, the particles are larger.

The stomach can't bear it.

The so-called "hard water" refers to the high content of calcium and magnesium in the water, and the precipitation after the hard water is boiled is mainly calcium carbonate and magnesium carbonate, which are harmless to the human body.

Scale.

These white precipitates are commonly known as water bases.

It is formed by the decomposition of bicarbonate in water when it is heated, mainly calcium carbonate.

and magnesium carbonate. In fact, these white sediments are a reaction of the hardness of the water quality, and the presence of sediment indicates that the water quality is hard, and from the safety aspect, the water on the sediment will not cause harm to the human body, and it can be drunk with confidence.

Tap water precautionsAccording to the "National Health Standards for Drinking Water", the zinc and iron content in 1 liter of tap water that meets the safety standards is generally less than milligrams, and adults need to supplement zinc 10 mg 15 mg and iron 12 mg and 18 mg per day. Even if we drink 5 liters of water a day, the trace elements we consume from tap water.

Most of them are less than 1 milligram, which is insignificant compared to the trace elements required by the human body.

In addition, tap water in some areas contains calcium and magnesium.

It is higher, but after boiling, a lot of precipitation will be lost, leaving a small amount of which is good for the human body. We advocate the protection of water resources, and we should pay attention to water conservation.

Water quality should also be kept an eye on.

The above content refers to Encyclopedia - Tap Water.

Scale. Scale, commonly known as "rust, water alkali", refers to the white lump or powder substance gradually formed by the mineral contained in hard water after boiling in the container (such as pot, pot, etc.), and the main components are calcium carbonate, magnesium hydroxide, magnesium carbonate, calcium sulfate, magnesium sulfate, calcium chloride, magnesium chloride, etc.

The thermal conductivity of scale is very poor, if the scale formed in the boiler is too thick, it will lead to the reduction of boiler efficiency, and in the worst case, it will cause boiler pipe burst and cause boiler accidents.

For example, the staff said that if the tap water is boiled, it is very likely that it is the precipitation of some calcium oxide and magnesium oxide.

But for the staff, Mr. Zhang also raised his own questions: "It turns out that there are no such things, from the property after brushing the water tank, there are these white things, floating objects, and the things in the water can't be eaten!" ”

In order to completely solve Mr. Zhang's troubles, the staff of Qiqihar Water Group took samples at Mr. Zhang's home and prepared to take the tap water for relevant water quality testing.

Liu He, deputy director of the water quality testing center of Qiqihar Water Group: We will take it back to test the water hardness and other aspects to see if there is any problem with the water quality.

This phenomenon is caused by too much calcium and magnesium ions in the water. Too much calcium and magnesium ions in water will lead to the formation of calcium carbonate, magnesium carbonate and other substances when heated. It appears as a loose white precipitate, which does not immediately form stubborn scaling, and this phenomenon itself is not harmful to the body, but it is unacceptable to the senses.

The composition of scale is mainly composed of calcium, magnesium, colloids and other substances, and the tap water with high hardness before purification is soluble in water before purification and filtration. For example, calcium and magnesium ions will adhere to the bottom of the pot to form scale; Purified tap water with high hardness.

After purification by the water purifier, the colloids in the water are filtered out, making calcium and magnesium ions insoluble in water. These are not visible in cold water. When boiled, it will float on the surface of the water.

Tap water has white precipitates of calcium carbonate and magnesium carbonate. It reflects the hardness of the water quality, which is often found in the northern part of our country. In the north, the precipitation is relatively small, and the groundwater is the main drinking water, the deeper the well, the higher the mineral content in the water, the more sediment in the water after boiling, this water can be drunk after a while of precipitation, and the boiling water boiled in the tap water has precipitation is also for this reason, and it can also be drunk.

It is inevitable that the water contains some organic pollutants, so when boiling water, when the water begins to steam and is about to boil, open the lid of the pot, which can volatilize some harmful substances and make the boiled water healthier. Some people boil water and turn off the heat as soon as the water is boiled, but it would be better if it could be boiled for another 2 minutes, because this can eliminate harmful substances more thoroughly. When boiling water, do not turn on the faucet and immediately connect the water, but should release some of the water first, because the first water will contain some rust pollutants in the pipes, and the stagnant water left in the original pipes, try not to drink.