Questions about dust?? How is dust generated?

Natural dust: Some are debris from mountain rocks, some are dry soil from fields, some are salt powder from the sea surface from the evaporation of waves, some are volcanic ash, and some are cosmic dust from interstellar space. These are natural dusts.

Man-made dust: mainly dust from chimneys, in addition to cement factories, metallurgical plants, chemical plants, ceramic factories, textile mills, flour mills, lime kilns, etc., these are all places where dust is manufactured. There are also some dust that comes from plant homes, such as pollen, cotton wool, catkins, seeds, etc.; Some come from animal homes, land sheds such as droppings, bird feathers, insect eggs, etc.

If there is no dust in the atmosphere, sunlight.

There is no absorption, reflection, scattering, and refraction, and the sky is either too bright or too dark. Since dust is a hygroscopic particle, without its core, the water vapor in the air cannot condense, and it is difficult for clouds in the sky to form, and the surface of the earth will become arid and barren without the cover of clouds, and the weather will either be too hot or too cold. Without dust, many harmful rays in the universe would break through or enter the Earth's surface unhindered, posing a deadly threat to humans and all living things.

In addition to these benefits, dust condenses water vapor. Let them become droplets, otherwise, everything will be so wet that although there is a lot of dust, it will also be immeasurable, it will enable the earth to gently obtain the sun's energy, and it will also make the atmosphere have enough condensation nuclei to increase the chance of clouds or rain formation; Regulate the temperature of the earth's surface to make it suitable for the survival and reproduction of life.

Dust is very harmful to the computer, too much dust may block the CPU fan, make the fan stop, cause the CPU to overheat and burn the consequences, but also affect the contact between the boards, and may also cause corrosion of the circuit board.

Dust is the enemy of human health, so people especially hate it, dust carries many bacteria, viruses and insect eggs everywhere and spreads diseases. Work.

Industrial dust and fine dust can make workers suffer from a variety of difficult occupational diseases, and excessive dust will also cause environmental pollution, affect people's normal life and work, and induce human respiratory diseases.

Dust is very harmful to computers. Excessive dust may clog the CPU fan, cause the fan to stop, cause the CPU to overheat and burn out, affect the contact between the boards, and may also cause corrosion of the circuit board.

Dust is an object that is finely dried into powdered soil or other substances, which is reduced to a fine part. Fine powders, dust particles are generally between one hundredth of a millimeter and a few hundredths of a millimeter in diameter, which is invisible to the human eye. What the human eye can see is a behemoth in the dust.

Hazards: Dust is the enemy of human health, so people especially hate it, dust carries many bacteria, viruses and insect eggs everywhere, spreading diseases. Industrial dust and fine dust can make workers suffer from a variety of difficult occupational diseases, and excessive dust will also cause environmental pollution, affect people's normal life and work, and induce human respiratory diseases.

Dust is very harmful to the computer, too much dust may block the CPU fan, make the fan stop, cause the CPU to overheat and burn the consequences, but also affect the contact between the boards, and may also cause corrosion of the circuit board.

Benefits: If there is no dust in the atmosphere, the sun's rays will not be absorbed, reflected, scattered and refracted, and the sky will be white, without wind, snow, rain, light, and rainbows. Since dust is a hygroscopic particle, without its core, the water vapor in the air will not be able to condense, and it will be difficult for clouds in the sky to form, and the surface will lose the cloud cover, and it will become arid and barren, and the weather will either be too hot or too cold.

Without dust, many harmful rays in the universe would break into the Earth's surface unhindered and pose a deadly threat to humans and various living beings. In addition to these benefits, dust condenses water vapor. Let them become droplets, or else everything will be wet and the creatures will not survive.

Although dust has many problems, its contribution is immeasurable, it can enable the earth to gently obtain the sun's energy, and it can also make the atmosphere have enough condensation nuclei to increase the chance of cloud and rain formation; Regulate the temperature of the earth's surface to make it suitable for the survival and reproduction of life.

Types of dust:

From the physical characteristics of dust, dust is a solid impurity, with many irregular shapes, mostly angular and gray, brown, black and other colors, and has water absorption. When there is a large amount of dust in the air and the relative humidity reaches a certain level, water vapor forms water droplets, so the dust is easy to be moistened by water and easy to absorb water.

Looking at its chemical properties, dust is more complex in its composition, and it can sometimes provide acid radicals and metal ions that cause degradation. Some dust is inherently acidic or alkaline, such as sulfuric acid fumes and photochemical smogs, and metal oxides and other particles are alkaline. In addition, due to the small particle size and large surface area, the dust in the dust has a strong adsorption capacity, which can adsorb harmful substances in the air on their surface, and is acidic or alkaline.

Dust often contains substances such as clay, which can absorb moisture in the air or in materials made of archives, causing it to undergo a hydrolysis reaction to decompose the adhesive aluminum hydroxide.

Its biological characteristics: due to the small size and weight of the spores of molds, they inevitably adhere to dust as they drift everywhere with the air, so dust is an ideal medium for microorganisms, breeding grounds and spreaders. During the growth process, microorganisms secrete mold that contains enzymes and organic acids.

Dust is the enemy of human health, so people especially hate it.