JPH1085316A - Air cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an air cleaner without any mechanical equipment for cleaning air by accommodating a plant-supporting member into a vase that consists of a perforated burnt substance occupying the surface layer, by which plants are supported, demonstrating an excellent absorption/removal function against specific harmful gas and offensive odor. SOLUTION: This air cleaner/consists of a vase 2, a plant support member 3 burnt to be filled into the vase, and plants 4 held by this plant support member. The plants 4 are inoculated and infected with a VA-germ root bacterium, whose roots 5 and the VA-germ root bacterium are living under a symbiotic relationship. The harmful gases 7 running around by the indoor air current are all absorbed and removed out by them wherever they pass through and contact with the plants 4 and their support member 3, thus cleaning the air. The plant support member 3 is preferable to have an ability of absorbing the harmful gases and in addition, the plant support member 3, preferably, has sufficient moisture reguired for the growth of plants 4, perforation, rigidity and is also water, soluble with proper pH. The plants 4 are preferable to be eucommiales belonging to the eucommeales family.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pot-type air purifier for greening indoors and absorbing and removing low-concentration harmful gases, and more particularly, to indoor trichloroethylene, benzene, formaldehyde and the like. The present invention relates to an air purification device for absorbing and removing low-concentration harmful gas and acetaldehyde which is a component of tobacco odor.

[0002]

2. Description of the Related Art A conventional indoor air purifying apparatus is provided with a blower fan and a filter having an air purifying function in a box-shaped container. The method of passing through was performed. In this method, a filter contains a deodorant, and an odor substance or the like is physically or chemically adsorbed on the deodorant to perform purification. However, as described above, the air purifying apparatus using the blower fan requires its power source, and is relatively large and lacks interior characteristics, so that there is a problem that the installation place indoors is limited.

[0003] Recently, a compact air purifying device has been proposed in which the shape is a foliage pot from the viewpoint of indoor beauty and a plant-like object having a harmful gas absorbing function is provided in a pot container. However, the plant-like object of the air purifying device is almost an artificial plant made of plastic (simulated tree). Therefore, although this device has an interior property, the greening effect, which is the original purpose of the house pot, is exhibited. I haven't. On the other hand, when living plants are planted in this pot-shaped air purifying device, in addition to soil cultivation to maintain the plant healthy, an air purifying device is required. Required volume. For this reason, this pot-shaped air purifying device has to be larger in pot size, even if a plant of the same size is used, as compared to a general potted pot, and it is uncomfortable as a potted pot. Occurred.

Certain plants are very effective at absorbing and removing harmful gases. The use of plants is different from mechanical devices,
Since no power supply is required for air purification, there is an advantage that the installation place is not restricted. However, plants that can actively absorb and remove specific harmful gases indoors,
Not yet found. In addition, plants are creatures and have problems such as difficulty in exhibiting a stable air purification ability due to withering or withering due to environmental changes or diseases.

[0005]

SUMMARY OF THE INVENTION Under such circumstances,
Demonstrates excellent absorption and removal functions for specific harmful gases and odors in indoor spaces, does not use mechanical devices for air purification, can be greened, has no unpleasant feeling as a potted pot, and impairs aesthetics There is a long-felt need for a houseplant-type air purification device that can be easily installed anywhere in a room, can be viewed for a long time, and uses plants with improved air purification ability.

[0006] It is an object of the present invention to provide an air purifying apparatus that can meet such a demand.

[0007]

According to a first aspect of the present invention, there is provided a first air purifying apparatus, comprising: a container; a plant supporting material which is housed in the container and is made of a porous fired material occupying at least a surface layer; It consists of a plant that has been planted.

[0008] A second air purification apparatus according to the present invention is a container, a plant supporting material which is housed in the container and is made of a porous fired material occupying at least the surface layer, and supported by the supporting material, Vesicular-arbuscular mycorrhi
zal fungi) consists of artificially inoculated and infected plants.

[0009] In these air purifying devices, the plant supporting material may have an ability to absorb harmful gas, and may have appropriate water retention, pores, hardness, and aqueous solution pH necessary for plant growth. preferable.

[0010] Particularly preferred plant support materials are fine granular sludge of 2 to 12 parts by weight (dry amount) and fine granular slag of 2 to 1 part.
2 parts by weight (dry amount) and 0.1 to 11 parts by weight (dry amount) of the carbonaceous raw material are kneaded, and the obtained kneaded material is granulated into, for example, pellets. And a baked product prepared by calcination.

The plant is preferably Eucommiacea (Eucommiacea)
e) Eucommia ulmoides.

The specific harmful gases intended for absorption and removal in the present invention are trichloroethylene, benzene, formaldehyde and the like which are constantly released from many materials such as general building materials and interior decorations. Examples of major sources include ink, paint, lacquer and dry cleaning clothing for trichlorethylene, ink, paint, plastic and rubber for benzene, foam insulation for formaldehyde, veneer, food bags and papers such as wax paper and paper towels. No. In addition, a bad odor includes acetaldehyde which is one of the main components of the tobacco odor.

Hereinafter, the present invention will be described more specifically.

As a material having both a function of absorbing low-concentration harmful gases and a function of supporting a plant root, a plant supporting material satisfying the following points is preferable. That is, the form of the plant
It is preferable to use a plant support material that has water retention for maintaining activity, and has appropriate pores, particle size and hardness adjusted for rhizome formation, and the pH of the aqueous solution is appropriately adjusted from the viewpoint of nutrient absorption.

Particularly preferred plant support materials are, as described above,
2 to 12 parts by weight of fine granular sludge (dry amount), 2 to 12 parts by weight of fine granular slag (dry amount) and 0.1 to 1 carbonaceous raw material
It is prepared by kneading 1 part by weight (dry amount), granulating the obtained kneaded material into, for example, pellets, and firing the obtained granulated material under reducing conditions.

The above-mentioned sludge is fine particulate matter deposited on a water purification plant, lake, marsh, dam or river. Landfill is the mainstream of the conventional sludge treatment method, but this causes secondary pollution such as generation of offensive odor and sludge runoff.

The slag is preferably a fine granular material obtained by melting and extracting nickel from silica nickel ore, and particularly preferably a fine granular material in which particles having a particle size of 0.001 to 0.1 mm account for 90% by weight or more. In a nickel production plant, the nickel content of the raw ore is 4% by weight or less, and most of the input ore is generated as slag. The relatively coarse particles of the slag are used as recycled aggregate (sand), but clay and silt (fine sand) account for about 90% by weight,
Fine-grained slag having a 50% average diameter of about 45 μm is either landfilled or left in a pile. The main components of the fine granular slag are SiO ₂ (53% by weight), MgO
(29% by weight), FeO (8% by weight),
CaO (6% by weight), Al ₂ O ₃ (3% by weight) and the like are contained. The fine-grained slag contains a relatively large amount of a metal oxide having a deodorizing effect, such as MgO, FeO, and CaO.

Particularly preferred as the carbonaceous raw material is fine-grained activated carbon having the finest particles by-produced during the production or regeneration of activated carbon. In addition, waste carbon of activated carbon after being used in sake brewing or food / beverage manufacturing processes can also be suitably used. All of these have high harmful gas absorption performance.

The reduction firing temperature of the particulate matter is preferably 700
１1100 ° C. In order to fire the granules under reducing conditions, the granules are fired in a state where air is shut off.

The fired product thus obtained is excellent in water retention, pores and hardness, and its aqueous solution has a pH of 6.5 to 7.0.
Of slightly acidic or neutral.

The fired product having the above-mentioned characteristics is suitable for germination, seedling raising and growing of plants. Therefore, it can be used as a substitute for the cultivation soil used for conventional houseplants, and can be used for houseplants having a function of absorbing harmful gas.

Next, the characteristics of plants inoculated and infected with VA mycorrhizal fungi will be described.

In the VA mycorrhizal fungi, a part of the hypha enters the intercellular space of the root of the plant and develops dendrites in the cortical cells. On the other hand, this fungus also spreads mycelia to the soil environment around the root, takes in soil nutrients, and sends it to the host plant. That is, the mycorrhizal zone is further expanded by the intervention of the mycelium. As a result, it is known that the absorption amount of phosphoric acid or the like having a low diffusion rate in the soil reaches several times that of the case without bacterial infection.

As described above, VA mycorrhizal fungi are endomycorrhizal fungi and, unlike other soil microorganisms, cannot be propagated alone. In other words, VA mycorrhizal fungi alone cannot exert any of the effects that the microorganisms have in a medium in which other soil microorganisms such as soil can generally act. In other words, mycorrhizal formation is possible only by establishing a symbiotic relationship with the host plant, and the mycorrhiza develops on the soil in its active area.

When the above-mentioned plant is cultivated using the fired material as a plant support material instead of ordinary soil, mycorrhizas are formed and spread in the fired material under the symbiotic relationship with the plant. Since the fired product is sterilized by firing in advance in the manufacturing process, there is no contamination with various bacteria. Therefore, VA mycorrhiza is preferentially present in the baked ball, and the effect of suppressing host disease even when contaminants such as pathogenic bacteria are mixed by addition of water and nutrients during plant acclimation, seedling raising, and growth. There is.

In the present invention, two methods are exemplified as a method for artificially inoculating and infecting plants with VA mycorrhizal fungi. In other words, the plants are inoculated and infected with VA mycorrhizal fungi at the stage of raising the plants, and the plants are transplanted to the burned material, or the plants sowed, raised, and transplanted on the burned material are charged with VA.
Inoculate and infect mycorrhizal fungi. In any case, there is no difference in establishing a symbiotic relationship by inoculating and infecting a plant with a powdery or granular VA mycorrhizal fungal preparation. VA to be inoculated
Mycorrhizal fungi are Glomus, Gigaspora
) And any other VA mycorrhizal fungi.

Plants that are symbiotic with VA mycorrhizal fungi can absorb water and nutrients from a wide area by expanding the VA mycorrhizal area in the burned material. Furthermore, by supplying nutrients that are difficult to use in plant roots by VA mycorrhiza, the living activity of the host plant is enhanced.

Thus, in an indoor environment, it is resistant to drought,
Shows cold and disease resistance, sustains chlorophyll,
In addition, the effect of maintaining the vigor for a long time is exhibited. Therefore, plants inoculated and infected with VA mycorrhizal fungi are given a long-term stable air purification ability in indoor spaces by imparting resistance to environmental changes and constantly maintaining a high level of assimilation. it can.

In this way, the plant inoculated and infected with the VA mycorrhizal fungus is transplanted to a burned material having a harmful gas absorbing function.
By an extremely simple manufacturing method of acclimatizing, raising and raising seedlings, it is possible to provide an air purifying apparatus that has a long-term stable and excellent absorption and removal effect on trichlorethylene, benzene, formaldehyde, acetaldehyde, and the like.

Furthermore, as a plant, Eucommiaceae (Eucommiac)
By using eucommia (Eucommia ulmoides), trichlorethylene can be absorbed and removed particularly efficiently.

[0031]

BEST MODE FOR CARRYING OUT THE INVENTION Next, some embodiments of the present invention will be described in order to specifically explain the present invention, but the present invention is not limited to these embodiments.

Example 1 (as a reference example) <Composition of fired product> Sludge from a water purification plant, waste activated carbon, and fine powder slag from a nickel production plant were kneaded as raw materials at the ratio shown in Table 1, and the obtained kneaded material was used as a raw material. After granulation, the obtained granules were fired at a temperature of about 1000 ° C. under reducing conditions. Thus, two types of fired products (A) and (B) were prepared. Table 1 shows the ratio of the raw materials and the physical properties of the fired product.

[0033]

[Table 1]

Note 1) Activated carbon in the form of fine powder with the finest particles by-produced during the production or regeneration of activated carbon.

Note 2) Fine powder slag after coarse ferronickel grains are eluted from silica nickel ore.

The obtained fired product was made to have a large water retention capacity and pores by firing and foaming. This calcined product was added to a three-fold amount of distilled water by weight and stirred for 3 minutes. This solution was filtered through filter paper (Toyo Filter Paper No. 2), and the pH of the obtained filtrate was measured with a pH meter. Is pH 6.5-7.
0 was slightly acidic to neutral.

The fired product obtained was black because it contained activated carbon, slightly white in a dry state, and changed to glossy black when it contained moisture. This discoloration has the advantage that the moisture state can be visually determined and the moisture management can be facilitated.

Example 2 (as a reference example) <Sprouting and growth test of plant using fired material as cultivated soil> The burned material (A) obtained in Example 1 was used as cultivated soil, Using radish (cultivar name: cherry mate) and asparagus (cultivar name: Mary Washington), which is used as a foliage plant, to examine the effect of the burned material on germination and growth, and the effect of vermiculite used as a horticultural soil And compared.

First, two sections of a fired product and vermiculite were set as test sections. 65mm × 65mm ×
Autoclave sterilizable bracket cultivation pot with a height of 100 mm and calcined material or vermiculite 100 m
and 40 ml of distilled water were added, and the tube was covered and sterilized in an autoclave for 20 minutes. After seeding radish and asparagus in 15 grains each, the temperature was 25 ° C,
These were allowed to stand under the conditions of an illuminance of 3000 lux and a photoperiod of 16 hours. The germination rate (germination number / test number × 100), average plant height (total plant height / germination number), and average fresh weight (fresh polymerization meter / germination number) of three weeks after sowing were examined for each plant. Table 2 shows the results.

[Table 2] As is clear from the results in Table 2, radish showed 93.3% germination rate and 86.7% asparagus in the fired product, which was superior to that of vermiculite. The average plant height of the baked product tended to be higher than that of vermiculite. However, in terms of average fresh weight, vermiculite tended to be superior in radish, although there was not much difference in asparagus. For this reason, it is considered that root swelling was observed in vermiculite in radish, and conversely, root swelling was not so large in the baked product, so that it was considered that there was no difference in plant height and a difference in fresh weight.

However, in any case, the fired product did not show any inhibitory effect on germination and elongation of the plant as compared with vermiculite used as horticultural soil. In addition, asparagus, which is used as a foliage plant, showed better results in germination and growth of plant height than vermiculite.
These data support that the above-mentioned calcined product can be sufficiently used as plant soil.

Example 3 <Test of Absorption and Removal of Low-Concentration Hazardous Gas by Plant and Burned Product> Trichloroethylene, benzene, formaldehyde and acetaldehyde were used as low-concentration harmful gas.
A test of the gas absorption performance of the plant and the fired product was performed.

Using the fired product (A) obtained in Example 1 as a plant support, 250 ml of the fired product was filled into a pot-shaped container having a diameter of 8 cm and a height of 7 cm. Here plants as Potos (Epipremnum aureum), Pachira (Pachira aquatic)
a), Dracaena sanderiana, Plectranthus coleoides, Eucommia (Eucommia ulmo)
ides), Benjamin (Ficus benjamina), Ordullan (Chlorophytum comosum), Asparagus (Asparagus p
lumosus) and table palm (Chamaedorea elegans) were respectively transplanted and acclimated under a greenhouse mist for 2 weeks. 70 ml of distilled water was added into a pot-shaped container. In this manner, each pot-shaped container in which the plant was transplanted to the plant support made of the fired product was placed in a 48-liter transparent sealed case. Separately, in order to measure the hermeticity of the case, a calcined product and a pot-shaped container not using a plant were placed in a 48-liter transparent sealed case as a control.

On the other hand, a diluent obtained by adjusting the concentration of trichloroethylene and benzene with ethanol and the concentration of formaldehyde and acetaldehyde with distilled water was added to the transparent sealed case, and the container was sealed. After confirming the vaporization of these added substances, the temperature was 25 ° C. and the illuminance was 3000.
The concentration was measured over time (unit: hours) by the gas tech method under the condition of looks (16 hours day length). 24
Table 3 shows the removal rate of each gas after time.

Assuming that the concentration at the start of measurement is A and the residual concentration after 24 hours is B, the gas removal rate is given by the following equation.

Removal rate = [(AB) / A] × 100

[0046]

[Table 3]

As is evident from Table 3, a remarkable absorption effect of the test gas was recognized by the combination of the baked product and the plant. That is, the plants combined with the calcined material show an absorption rate of 90.6% for eucommia in trichlorethylene and 60.0% in oryzulane, while 75.0% of pothos in benzene and 70.0% in eucommia in benzene. Was shown. In addition, pothos, eucommia and table palm showed 90.7% absorption of formaldehyde. Therefore, depending on the plant, trichloroethylene,
Although differences in absorption for benzene and formaldehyde were observed, Eucommia proved to be extremely effective at absorbing each substance. As for acetaldehyde, all plants combined with the calcined product showed an absorption rate of 100%.

Regarding the airtightness, in the control, no leakage was observed in trichloroethylene, formaldehyde and acetaldehyde, and 11.0% in benzene. Significant increase was observed.

Example 4 <Test of Absorption and Removal of Low-Concentration Hazardous Gases by Plants Inoculated and Infected with VA Mycorrhizal Fungus and Burned Product> In the attached drawings, the air purification device (1) is composed of a container (2) and a container (2). It comprises a plant support material (3) made of a baked product to be filled and a plant (4) supported by the plant support material (3). The fired product is the fired product (A) obtained in Example 1. Plant (4) was inoculated and infected with VA mycorrhizal fungus, and its plant root (5) and VA mycorrhizal fungus (6)
Is developed under the symbiotic relationship. In the air purification device (1) with this configuration, harmful gas is
(7) is absorbed and removed when passing through the plant (4) and the calcined product (3) in a contact state, and the air is purified.

Using an air purification device (1), a gas absorption test was conducted on trichlorethylene and benzene as harmful gases (7).

First, two plots of a plant inoculated and infected with VA mycorrhizal fungi and a non-inoculated plant as a control were set as test plots. 250m in a 8cm diameter x 7cm height bowl
After the potatoes, Plectranthus, Eucommia, and Benjamin were transplanted as plants, respectively, the surface of the cultivated soil was inoculated with a commercially available mycorrhizal fungal preparation (adjusted to 3000 spores). . Next, each plant was acclimated for 2 months in a greenhouse (shade 30%). 70 ml of distilled water was added into a pot-shaped container. In this manner, each pot-shaped container in which the plant was transplanted to the plant support material made of the baked product was forty-eight.
1 liter in a transparent sealed case.

On the other hand, a diluent obtained by adjusting the concentration of trichloroethylene and benzene with ethanol was added to each of the transparent sealed cases, and then the container was sealed. After confirming the vaporization of these added substances, the temperature was 25 ° C. and the illuminance was 3000.
Under the condition of looks (16 hours day length), each gas concentration after 24 hours was measured by the gas tech method.

The same plant was repeated three times in succession for the above experiment. Table 4 shows the first and third removal rates of each plant.
The method of calculating the removal rate is the same as in the third embodiment.

[0054]

[Table 4]

The removal rate of each low-concentration gas in the target plants inoculated and infected with VA mycorrhizal fungi tended to decrease slightly as the number of repetitions increased, but this did not cause a problem in the absorption effect. . On the other hand, the removal rate of each low-concentration gas in the target plants not inoculated with the VA mycorrhizal fungi was clearly lower at the third repetition than at the first repetition.
For this reason, in the target plants not inoculated with the VA mycorrhizal fungi, defoliation was observed as the number of repetitions was increased, which seemed to reduce absorption of low concentration gas. In particular, the leaves of the geese fell sharply, and all leaves fell after the second repetition, and could not be used for the third test. In conclusion, it is presumed that contact / infection with VA mycorrhizal fungi imparts resistance to plants against shock under low concentration gas.

Example 5 <Test of Environmental Resistance of Plants by Contact and Infection of VA Mycorrhizal Fungi) VA mycorrhizal fungi in winter (3 months from December to February) using dracaena (Dracaena sanderiana) as a test plant Was compared with a non-contact control group. The operation was performed in the same manner as in Example 4 using the air purification device shown in the drawing.

First, two plots were set as a test plot: a plant inoculated and infected with VA mycorrhizal fungi and a non-inoculated plant as a control. 25 in a 8 cm diameter x 7.5 cm height bowl
After filling with 0 ml of the baked product and transplanting dracaena into it, a commercially available VA mycorrhizal fungal preparation was coated on the surface of the soil with a spore count of 3000.
Individually adjusted and inoculated. After acclimatizing the plants for 3 months in a greenhouse (30% shading), the chlorophylls of the leaves were analyzed using a chlorophyll meter (SPAD-501, manufactured by Minolta Camera Co., Ltd.).
The AD value was measured. The SPAD value shows a correlation with the chlorophyll content of the target plant. Average SPAD value (total SPAD value /
30 × 100) and the results of the statistical processing are shown in Table 5.

[0058]

[Table 5]

As is clear from Table 5, the contact of VA mycorrhizal fungi
A significant difference was found at the 0.1% risk level between the average SPAD value of the infected plot and the average SPAD value of the non-contact plot, with the former exceeding the latter. The SPAD value is a numerical value of the amount of chlorophyll, and a higher value indicates that the chlorophyll has more chlorophyll. However, when the dracaena leaves were visually compared, uninoculated leaves tended to yellow rather than increase in chlorophyll due to contact and infection with VA mycorrhizal fungi. In other words, the difference in the amount of chlorophyll was thought to be due to the yellowing of uninoculated leaves due to the low temperature injury. In conclusion,
VA mycorrhizal fungi have been found to have the effect of preventing cold injury to winter plants and preserving chlorophyll. In addition, spots of spot disease, that is, yellowish brown spots appeared on the leaves in some of the uninoculated dracaena, were not observed in dracaena inoculated and infected with VA mycorrhizal fungi. Similar results were obtained using other commercially available mycorrhizal fungi preparations.

[0060]

The air purifying apparatus according to the present invention has an excellent purifying function for a specific harmful gas in an indoor space, does not use a mechanical device for air purification, and can be greened. It can be easily installed anywhere in the room without discomfort and aesthetics, and can be viewed for a long time.

[Brief description of the drawings]

FIG. 1 is a vertical sectional view showing an air purification device.

[Explanation of symbols]

 1: air purification device 2: container 3: plant support material 4: plant 5: plant root 6: VA mycorrhizal fungus 7: harmful gas

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification symbol FI B01D 53/38 B01D 53/34 116A 53/81 (72) Inventor Tetsuya Hirata 949 Uegami, Shigeicho Miya, Innoshima-shi, Hiroshima, Japan Stock Company Inside Green Tech (72) Inventor Yoshitada Yamagishi Yoshi949, Miyagi-cho, Innoshima-shi, Hiroshima Inside Green Tech Co., Ltd. (72) Inventor Shigeyoshi Osawa 949, Shigei-cho, Miyajima, Inshima-shi, Hiroshima, Japan Green Tech Co., Ltd. (72) Inventor Tetsuya Ueda 4-1-2, Hirano-cho, Chuo-ku, Osaka City Inside Osaka Gas Co., Ltd. (72) Inventor Iwane 4-1-2, Hirano-cho, Chuo-ku, Osaka City Osaka Gas Co., Ltd. (72 ) Inventor Hiroki Kawaguchi 5-3-28 Nishikujo, Konohana-ku, Osaka-shi Inside Hitachi Zosen Corporation (72) Inventor Noboru Ikemoto 5-3-1 Nishikujo, Konohana-ku, Osaka-shi 28 Hitachi Zosen Corporation (72) Inventor Masakatsu Matsuishi 5-3-3 Nishikujo, Konohana-ku, Osaka-shi Hitachi Zosen Corporation (72) Takanobu Watanabe 5-3-1 Nishikujo, Konohana-ku, Osaka-shi No. 28 Inside Hitachi Zosen Corporation

Claims (5)

[Claims] 1. An air purifying apparatus comprising: a container; a plant support made of a porous fired material that is housed in the container and occupies at least the surface layer; and a plant supported by the support. 2. A container, a plant support made of a porous calcined material occupying at least the surface layer and contained in the container, supported by the support, and having a mycorrhizal VA (vesicular-arbus).
An air purification device consisting of plants that have been artificially inoculated and infected with cular mycorrhizal fungi). 3. The plant supporting material has an ability to absorb harmful gas, and has water retention, pores, hardness, and aqueous solution required for plant growth.
The air purification device according to claim 1 or 2, wherein the air purification device is provided with H appropriately. 4. The method according to claim 1, wherein the plant supporting material is a fine granular sludge of 2 to 12 times.
After kneading 2 to 12 parts by weight (dry amount) of fine granular slag and 0.1 to 11 parts by weight (dry amount) of a carbonaceous raw material, and granulating the obtained kneaded material, 3. The air purification device according to claim 1, comprising a calcined product prepared by calcining the obtained granular material under reducing conditions. 5. The plant according to claim 1, wherein the plant is Eucommia ulmoides of Eucommiaceae.
An air purification device as described in the above.