Plants in the home can't do dust removal, sterilization, formaldehyde absorption.

Dust removal and sterilization of formaldehyde, plants in the home do not do.

Recently, a "the benefits of placing these plants in the home" news has been widely disseminated, which lists the special "functions" of a variety of plants: "dripping guanyin to remove dust, Junzilan release oxygen, rubber tree in addition to harmful objects, Wenzhu bacteria, Silver Queen purification Air, fern and ivy suck Formaldehyde, Hanging orchid suction of carbon monoxide and formaldehyde in the air, Aloe Vera air cleaner, brown bamboo in addition to heavy metal pollution and carbon dioxide, tortoise bamboo at night to absorb carbon dioxide, make a fortune of the exhaust gas, cactus to reduce electromagnetic radiation. "These plants are common plants grown indoors, do they really have these magical functions?"

Can plants dust out? 
In recent years, there have been frequent haze in cities such as Beijing and Shanghai, and the impact of haze on people's health has been paid more and more attention.  As a result, many businesses hit the name "Plant absorption PM2.5" "Plant dust Removal" and other names to attract customers to buy plants. In fact, "plants can remove dust" and derived "plants can absorb PM2.5", in fact, mainly because people often see plant leaves often covered with dust. However, contaminated dust is not the plant itself to snatch dust particles in the air, but a passive result. On the surface of plant blades, there are often some keratin or waxy layers. These keratin or waxes are secreted by epidermal cells and play a protective role in epidermal cells. The wax, cuticle surface is rough, which increases the surface area of the blades, and the rough surface is more likely to be stranded on the dust particles that fall on them. In addition, the PM2.5 particles that fall on the leaf surface can also enter the plant leaves through the stomata and stay in the plant leaves. Visible, plant blades can adsorb and remain on the dust particles that fall on them, but dust elsewhere in the room cannot be actively captured. The reason why some people think that dripping guanyin will dust, just because it leaves large, more easy to "fall ash".

In fact, the main dust removal of plants occurs in the outdoor environment. Plants planted in pieces can effectively reduce wind speed, and with the reduction of wind speed, the dust particles in the air will be more likely to settle to the ground or be adsorbed by the leaf surface, so as to reduce the dust flying purpose. For indoor generally only about 0.3m/s air flow rate, so the dust removal effect is not significant.

Can plants remove indoor gas contaminants? 
In the decoration of the new home to put plants to absorb formaldehyde, is often heard in daily life a word of advice. In practice, however, the absorption of formaldehyde by plants is actually quite low, mostly in the order of magnitude of 1mg/h/㎡, while the highly regarded hanging orchid is even 0.15 mg/h/㎡. For the frequent dozens of square meters of indoor space, hanging orchid, ivy and other absorption rate is too slow, no practical significance.

The mechanism by which plants absorb formaldehyde is that formaldehyde molecules can bind to proteins in plants. Therefore, formaldehyde has a certain toxicity to plants. Although plants can not absorb formaldehyde, but some formaldehyde sensitive plants, such as triangular plum and safflower oxalus pulp grass, in the presence of low concentrations of formaldehyde can produce toxic phenomena, can be used as an environmental indicator plant.

Similar to formaldehyde, other gas pollutants, such as sulfur dioxide, nitrogen dioxide, etc., although the plant can absorb, but the amount is small. For example, the most high absorption capacity of sulfur dioxide mahogany lotus, its absorption is generally about 10mg/h per kilogram of dry leaves, after conversion and formaldehyde difference is not much. For nitrogen oxides produced by smoking, such as nitrogen dioxide, their absorption is generally around 1-5mg/h per kilogram of dry leaves. Carbon monoxide, on the other hand, is more special because it is itself a gas signaling molecule in plants, with very little intake from the outside world. In the use of plants to absorb harmful gas pollutants is also to consider that in the absorption process, the indoor is still producing these gas molecules, and so that the slow absorption effect of a further discount. Therefore, to remove the gas contaminants in the home, in good weather in time to open the window ventilation, is the best and most economical choice.

Can plants remove bacteria? 
In plants, after tens of thousands of years, a defense system has evolved to fight microbial encroachment such as bacteria. Many of the chemical constituents contained in plants have a certain antibacterial effect. However, for plants to be able to remove indoor bacteria, they must be exposed to the bactericidal substances and bacteria contained in the plants. Under normal circumstances, microorganisms such as bacteria fall on plant leaves and even invade plants, where plants can use their chemical defenses to suppress and kill microorganisms. But this way, as mentioned above, the "dust removal" process, can only passively kill the bacteria in contact with the plant body, lack of "indoor sterilization" significance.

However, there is another way for plants to kill and suppress microorganisms in the surrounding environment. In the volatile components of plants, contains a lot of antimicrobial substances. For example, the common oleander, its volatile gas contains methyl salicylate, acrylic acid and other bactericidal antibacterial components, camphor volatile substances in camphor also has bacteriostatic effect. However, these plants produce volatile substances, mostly with unpleasant irritating odors, and are not suitable for indoor cultivation. Moreover, most of the emission of volatile substances needs to be heated by sunlight. There is a lack of light in the room, so the antibacterial effect of volatile substances is greatly reduced. As for Wenzhu, its own lack of volatile substances, and the plant type is slender, the residual effect on dust, bacteria is poor, and can not play the role of Bacteriostatic.

Can plants absorb carbon dioxide and release oxygen?
In fact, plants, as self-supporting organisms that depend on photosynthesis for their livelihood, are bound to absorb carbon dioxide and release oxygen. Therefore, it is a vernacular to say that a certain plant can absorb carbon dioxide to release oxygen. And some businesses claim that some plants are able to "absorb carbon dioxide and release oxygen at night", thus avoiding nocturnal plants and people vying for oxygen, which is actually a misreading of a plant group with a special metabolic process.

In arid desert areas, there is a class of plants, known as jingtian acid metabolic plants. These plants open their stomata when they are cool at night, absorb carbon dioxide and convert it into malic acid, stored in the cells ' vacuoles. When the day is hot the next day, the stomata are closed to reduce water loss, when the carbon dioxide stored in the vacuoles is released and the synthetic sugars are driven under light. However, such plants do not release oxygen at night. This is due to the energy that breaks down the water molecules into hydrogen ions and oxygen, from the light energy that shines into the pigment molecules in the center of the chloroplast, and the light energy cannot be stored. Therefore, the production of oxygen must rely on the presence of light. Without light, oxygen is not released. And the above said "at night to absorb carbon dioxide" tortoise bamboo, which itself belongs to the Tian Nan Xing, does not belong to the landscape acid metabolic plants, in the night will be due to respiration to release carbon dioxide. So sometimes you can't reach the imaginary effect, you can try the Air purifier product

Can plants reduce electromagnetic radiation? 
"Putting plants next to a computer can reduce radiation," is already an old rumor. First of all, radiation is divided into electromagnetic radiation and ionizing radiation two kinds. The former is an electromagnetic wave, while the latter is a stream of charged or uncharged particles. For the human body, only a special frequency of electromagnetic waves (ultraviolet, gamma-ray, etc.) and ionizing radiation, because it can cause human biological molecular dysfunction, and thus to a certain extent to the health risks. But the computer itself does not produce ionizing radiation, and the electromagnetic radiation it produces is not extreme electromagnetic waves such as ultraviolet rays and gamma rays. There is also no evidence that electromagnetic waves produced at the power of computer operation can have adverse effects on the human body. There is no need to worry too much about the problem at the moment.

Imagine that radiation, electromagnetic waves and things like that are scattered around, plants on one side, can not play a role at all.

For plants, it can only cover the visible light and its surrounding frequency of a section of electromagnetic waves, for the longer band and the shorter band of electromagnetic radiation has no shielding effect. And because of the propagation characteristics of electromagnetic waves, the plants placed on the sidelines are not of any use in blocking electromagnetic radiation. Cactus radiation-proof rumors are only derived from the misreading of the properties of the environment in which it can grow in extreme heat and hot sun.

In fact, the plants do not have as many special benefits as the merchants advertise. Those seemingly tempting "benefits", basically lack of a solid theoretical basis, more rely on exaggeration, sympathies, brain tonic. The greatest benefit of placing plants in the home is to embellish the family and make the home more stylish and interesting. At the same time, due to the transpiration of plants, indoor air humidity can be improved to a certain extent. When choosing a home plant, you should choose to match it with your preferences and styles, rather than expecting too much of the "special features" that these businesses claim. Plants are able to regulate indoor air quality, can do ornamental and so on. Sometimes you can adjust your mood.

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