JP6961208B2 - Hazardous substance removal method - Google Patents

Description

The present invention relates to a method for removing harmful substances capable of effectively removing PM2.5 in the air and harmful substances generated from cigarettes when smoking, such as carbonyls, nicotine, active oxygen, and nitrogen compounds.

Conventionally, as a method for removing harmful substances, harmful microorganisms, etc. in the air that have contributed to environmental pollution, regenerated cellulose, wood pulp, waste, etc. supported on honeycomb, porous ceramics, glass fiber or metal fiber or carbon fiber, Granular, powdered or fibrous activated carbon materials made from raw materials such as coconut husks, coal, phenol and synthetic fibers and filters mainly composed of zeolite are used, and these materials are known to be effective to some extent. Further, as a tobacco-containing toxic substance removing agent, a mixture of menthol, ascorbic acid, glutimine, comfrey powder, bereloxyannaoxine, stearic acid, bertol, glove aniline, lecithin, benzoic acid, and vanillin is known. (See Patent Document 1). As another means for removing harmful substances and the like, Patent Document 2 describes a photocatalyst characterized in that a functional powder having a photocatalytic action (titanium oxide, zinc oxide, iron oxide, etc.) is supported on activated carbon fibers. It discloses an air cleaning filter which uses, the other hand, as a means of removing harmful substances generated from tobacco by smoking, Patent Document 3 is constituted by at least _{CaO, B 2 O 3, SiO} 2, and Al ₂ O ₃ A filter for tobacco smoke containing a porous glass is disclosed.

By the way, air pollution such as PM2.5, which has been increasing in recent years, and health hazards due to smoking have been attracting more attention, and a simple and safe method for removing air pollutants more effectively than ever before. There are many voices wishing for.
However, when the above-mentioned filter capable of removing harmful substances, harmful microorganisms, etc. in the air is used for various electric / electronic devices such as air conditioners, fan heaters, air purifiers, vacuum cleaners, and dryers, indoor dust Although it has the effect of removing dust and dirt, it is not easy to say because it requires maintenance such as clogging of the filter.

In addition, anti-pollution cosmetics that can prevent or suppress damage to the skin among health hazards caused by external stimuli such as air pollutants are also attracting attention. Conventionally, cosmetics that densely coat the skin by blending an oil-based film agent have been proposed, but although it is effective in terms of preventing irritating substances from adhering to the skin, the skin is covered with a tight film. Therefore, it was uncomfortable to use, and it was unclear whether it was effective against all irritating substances. As another anti-pollution cosmetic, Patent Document 4 is a composition for protecting skin or hair from heavy metals contained in air pollutants, which is characterized by blending a chelating agent for chelating heavy metals and sphingolipid. Cosmetics), and Patent Document 5 describes a skin / hair protective agent containing an extract of a plant belonging to the genus Orchidaceae, which is based on an irritant based on the antioxidant action of the extract. It is intended to mitigate the adverse effects.

Especially recently, active oxygen (free radicals) is generated in PM2.5, ultraviolet rays, and tobacco smoke, and the accumulation of intracellular reactions of active oxygen leads to aging. This oxidative stress causes the skin stratum corneum. It has been clarified that the keratin of the above is carbonylated (Non-Patent Document 1). Keratin originally takes up a lot of water molecules, but by carbonylation, it eliminates water molecules, and after carbonylation, keratin cannot take in water molecules, which further dries the skin. It is known that the appearance of the skin is impaired by causing the skin to lose its transparency, flexibility and elasticity (Non-Patent Document 2 and Patent Document 6). Therefore, as in Patent Document 7, skin care cosmetics containing magnesium aluminometasilicate and an ultraviolet protective agent for the purpose of effectively protecting the skin from various external stimuli including ultraviolet rays have been disclosed.

In recent years, a method for extracting a polysaccharide derived from the freshwater cyanobacteria Suizenji nori has been developed by Kaneko et al. Of Japan Advanced Institute of Science and Technology, and its application to cosmetics and pharmaceuticals is being studied (Patent Document 8). The reason is due to its moisturizing effect, film forming ability, and adsorption effect of rare metal ions by waiting for both positive and negative ions in the molecule. Furthermore, although the polysaccharide extracted from Suizenji nori has a super high molecular weight (measured by Kaneko et al., The weight average molecular weight is about 10,000,000 or more), it is water-soluble, and is used as a beauty essence. Since it can be blended in a lotion, it is an easy-to-handle material expected as an ingredient for basic cosmetics like a hyaluronic acid compound (Non-Patent Documents 3 and 4). In particular, recent research has revealed that the use of a sheet of Suizenji nori polysaccharide aqueous solution suppresses the evaporation of water to the outside of the sheet and the invasion of chemical substances into the sheet. The possibility that the application of the above can be realized is very high (Non-Patent Document 5). The applicant has already proposed a composition containing Suizenji nori polysaccharide (Patent Document 9).

Special Publication No. 62-44910 JP-A-2002-355299 Japanese Unexamined Patent Publication No. 2001-95552 Japanese Unexamined Patent Publication No. 2004-244423 Japanese Unexamined Patent Publication No. 2004-262894 Japanese Unexamined Patent Publication No. 2006-349372 WO2014 / 136993 Japanese Patent No. 4066443 Japanese Unexamined Patent Publication No. 2014-152170

Jens J. Thiele et al., THE JOURNAL OF INVESTIGATION DERMATOLOGY, Vol.113, No.3, 1999, p.335, 339 Ichiro Iwai et al., J. Soc. Cosmet. Chem. Jpn., Vol.42, No.1, 2008, p.16-21 M. K. Okajima, et. al, Macromolecules, 42, 3057 (2009) M. K. Okajima, et. al, Langmuir, 25 (15), 8528, (2009) Hitoshi Masaki "Functional Cosmetic Materials-Material Development and Safety-" pp. 112-117 (2016)

The present invention has been made in view of the above-mentioned problems and the like, and by using a composition containing Suizenji nori polysaccharide derived from Suizenji nori, which is a freshwater blue-green algae, harmful substances are not invaded. It provides a very simple method for removing harmful substances that can be captured.

As a result of diligent studies to achieve the above object, the Suizenji nori polysaccharide derived from Suizenji nori, a freshwater blue algae, is effective in suppressing water evaporation and chemical substance invasion (a). ) A composition containing Suizenji nori polysaccharide derived from Suizenji nori, a freshwater blue algae, (b) water, and (c) polyhydric alcohol, or a dried product of the composition, or a powder surface-treated with the composition. We have found that harmful substances can be captured by using Suizenji nori, and have completed the present invention.

That is, the method for removing harmful substances according to the first invention is
A toxic substance removing method that captures the toxic substance from gas / dust containing the toxic substance and protects the skin from the harmful substance, and is a composition containing the following components (a), (b) and (c). Is applied to a target skin portion where protection against harmful substances is desired, thereby capturing the harmful substances without invading the target skin portion.
(A) Suizenji nori polysaccharide derived from Suizenji nori, a freshwater blue-green algae (b) Water (c) Polyhydric alcohol

The method for removing harmful substances according to the second invention is
A toxic substance removing method that captures the toxic substance from gas / dust containing the toxic substance and protects the skin from the harmful substance, and is a composition containing the following components (a), (b) and (c). It is characterized in that a film formed into a film by drying is attached to a target skin portion where protection against harmful substances is desired, thereby capturing the harmful substances without invading the target skin portion.
(A) Suizenji nori polysaccharide derived from Suizenji nori, a freshwater blue-green algae (b) Water (c) Polyhydric alcohol

The method for removing harmful substances according to the third invention is
A method for removing a harmful substance that captures the harmful substance from gas or dust containing the harmful substance and protects the skin from the harmful substance, and is a composition containing the following components (a), (b) and (c). By applying the powder surface-treated in (1) to a target skin portion where protection against harmful substances is desired, the harmful substances are captured without invading the target skin portion.
(A) Suizenji nori polysaccharide derived from Suizenji nori, a freshwater blue-green algae (b) Water (c) Polyhydric alcohol

The method for removing harmful substances according to the fourth invention is
A film containing the following components (a), (b) and (c) is dried to form a film, which is used as a filter to capture the harmful substances from gas / dust containing the harmful substances. Is to be.
(A) Suizenji nori polysaccharide derived from Suizenji nori, a freshwater blue-green algae (b) Water (c) Polyhydric alcohol

The method for removing harmful substances according to the fifth invention is
A column filled with a powder surface-treated with a composition containing the following components (a), (b) and (c) is used as a filter to capture the harmful substances from gas / dust containing the harmful substances. It is characterized by doing.
(A) Suizenji nori polysaccharide derived from Suizenji nori, a freshwater blue-green algae (b) Water (c) Polyhydric alcohol

According to the method for removing harmful substances of the present invention, a composition containing Suizenji nori polysaccharide derived from Suizenji nori, which is a freshwater blue algae, water and / or polyhydric alcohol, a dried product thereof, or the composition thereof. By simply applying the surface-treated powder to the target skin area where protection against harmful substances is desired, it is possible to capture the harmful substances without invading them. Since it is a natural polysaccharide, it is not irritating and water is needed if necessary. It can be washed off immediately with, and it does not have the sticky feeling of using an oil agent, and has the effect of being extremely simple. Further, if the dried product of the above composition or the powder surface-treated with the above composition is used as a filter, the harmful substance can be captured from the gas / dust containing the harmful substance.

It is a graph which shows the measurement result of the carbonylated protein level when the composition which concerns on this invention is applied to the skin. It is a figure which shows the toxic substance removal apparatus. It is a graph which shows the measurement result of the toxic substance removal in the mainstream cigarette smoke by the toxic substance removal device of the filter using the composition which concerns on this invention. It is a graph which shows the measurement result of the toxic substance removal in the mainstream cigarette smoke by the toxic substance removal apparatus using the film which dried the composition which concerns on this invention. It is a graph which shows the measurement result of the toxic substance removal in the mainstream cigarette smoke by the toxic substance removal apparatus using the surface-treated powder film.

Next, a specific embodiment of the method for removing harmful substances according to the present invention will be described.

(A) The suizendinori polysaccharide derived from suizendinori, which is a freshwater pentose, used in the composition of the present invention is a sugar structure having a hexose structure, which is extracted by the method described in Patent Document 8. And a sugar structure having a pentose structure has a repeating structure of sugar chain units linked in a linear or branched chain by an α-glycoside bond or a β-glycoside bond, and the sugar chain unit is lacticated as a sugar structure. In the sugar chain unit, 2.7 or more hydroxyl groups are sulfated per 100 hydroxyl groups, or the sulfur element accounts for 1.5% by mass or more among all the elements. It is a feature.

The Suizenji nori polysaccharide is considered to have a rod-like (rod-like spiral) structure in an aqueous solution. This is because the liquid crystal structure is formed when the concentration of the Suizenji nori polysaccharide aqueous solution having a weight average molecular weight of about 16,000,000 is 0.2% by mass or more. In order to confirm the liquid crystal structure, an aqueous solution is prepared at a predetermined concentration, and the solution is irradiated with light by an orthogonally polarized light system and observed. At this time, it shines brightly when exposed to light by an orthogonally polarized light system, and when the rainbow-colored brilliance is confirmed, it can be said that it has a liquid crystal structure. This is a birefringent color due to the liquid crystal structure. Since the liquid crystal structure of Suizenji nori polysaccharide is expressed in an aqueous solution of 0.2% by mass or more, the molecule can be said to be rod-shaped (rod-shaped spiral).

The blending amount of Suizenji nori polysaccharide in the gel-like composition of the present invention is 0.01 to 10% by mass (hereinafter, simply referred to as "%") in the total amount of the gel-like composition.

Examples of the polyhydric alcohol used in the composition of the present invention include glycols such as polyethylene glycol, propylene glycol, dipropylene glycol, 1,3-butylene glycol and pentylene glycol, glycerin, diglycerin and decaglycerin. Examples thereof include glycerin monoethers such as polyglycerin, glycerin monopalmityl ether (chimil alcohol), glycerin monostearyl ether (bacyl alcohol), and glycerin monooleyl ether (ceracyl alcohol), and one or two of these. The above can be selected and used. Particularly preferably, 1,3-butylene glycol, pentylene glycol, and glycerin are used.

The blending amount of the polyhydric alcohol in the composition of the present invention is appropriately set depending on the shape of the composition, and is preferably 0.1% or more and 80% or less, and 2% or more and 50% or less, for example. ..

Various kinds of compositions of the present invention include preservatives, fragrances, moisturizers, ultraviolet absorbers, salts, solvents, resins, antioxidants, chelating agents, neutralizing agents, pH regulators, insect repellents, physiologically active ingredients, etc. The ingredients can be used as long as the object of the present invention is not impaired.

The method for coating the powder surface with Suizenji nori polysaccharide is as follows (see Japanese Patent Application Laid-Open No. 2013-82249). First, the Suizenji nori polysaccharide is dissolved in the solution using a disperser such as a homogenizer. Next, the Suizenji nori polysaccharide solution and the powder are uniformly stirred using a stirrer. The viscous solution is freeze-dried, crushed with an impact crusher (hammer mill), and then granulated using an automatic sieving machine or the like, or spray-dried while stirring by applying heat to the viscous slurry. It is sent into a machine tank, spray-dried, and then pulverized using an automatic sieving machine or the like to obtain the desired Suizenjinori polysaccharide-coated powder.

The amount of surface-treated Suizenji nori polysaccharide to powder is in the range of 0.1 to 0.5% by mass with respect to the mass of the powder, although it depends on the particle size and specific surface area of the powder to be surface-treated. It is preferable to have it. If it is less than 0.1% by mass, the effect of the present invention may not be obtained, and if it exceeds 0.5% by mass, handling in the manufacturing process becomes difficult, which is not preferable.

The powder coated with the composition in the present invention may be further subjected to various surface treatments, for example, conventionally known surface treatments. Examples of this surface treatment include fluorine compound treatment (perfluoroalkyl phosphate treatment, perfluoroalkylsilane treatment, perfluoropolyether treatment, fluorosilicone treatment, fluorinated silicone resin treatment, etc.), silicone treatment (methylhydrogen). Polysiloxane treatment, dimethylpolysiloxane treatment, vapor phase method tetramethyltetrahydrogencyclotetrasiloxane treatment, etc.), silicone resin treatment (trimethylsiloxysilicic acid treatment, etc.), pendant treatment (gas phase method silicone treatment followed by alkyl chains, etc.) Method), silane coupling agent treatment, titanium coupling agent treatment, aluminum coupling treatment, silane treatment (alkylated silane, alkylated silazane treatment, etc.), oil agent treatment, N-acylated lysine treatment, polyacrylic acid treatment, Examples include metal soap treatment (stearate treatment, myristate treatment, etc.), acrylic resin treatment, inorganic compound treatment, plasma treatment, mechanochemical treatment, and the like. Further, a plurality of these processes can be used in combination.

The powder coated with the composition in the present invention is usually an oil agent, a surfactant, a pigment, a preservative, a fragrance, a moisturizer, a salt, a solvent, a resin used in cosmetics, pharmaceuticals, pharmaceutical products, foods and the like. , Antioxidants, chelating agents, neutralizing agents, pH adjusters, insect repellents, physiologically active ingredients and the like can be used in combination within a range that does not impair the object of the present invention.

The composition of the present invention can be produced by heating, stirring and mixing, and can be applied to, for example, fields such as pharmaceuticals, medical supplies, cosmetics, and foods. Further, the film-like composition obtained by evaporating excess water of the composition obtained by the above method at room temperature or higher and 160 ° C. or lower can be applied to a filter and can be applied as a poultice itself if applied to the skin as it is. Is. Furthermore, the same effect can be obtained with the surface-treated powder obtained by treating the powder with the composition obtained by the above method, and the cosmetic that applies the surface-treated powder to the target skin portion. It can also be applied to pharmaceuticals and the like, or as a filler for filling a column and the like with powder.

Next, specific examples of the method for removing harmful substances according to the present invention will be described with reference to the drawings. The present invention is not limited to these examples.

(Example 1)
A composition containing the following ingredients (skin care composition) was produced according to the following production method.
<Composition component (unit:%)>
(1) Suizenji nori polysaccharide (Note) 0.05
(2) 1,3-butylene glycol 10.00
(3) Water 89.95
<Manufacturing method>
All the above components are mixed at room temperature, and then heated and stirred at 80 ° C. to dissolve and homogenize. The solution was returned to room temperature to obtain the desired composition.
(Note): A sugar derivative was extracted from Suizenji nori by the method described in Patent Document 8. When the molecular weight was measured by the light scattering method, the molecular weight was 16,000,000, and it was confirmed that they were the same (the same applies to the Suizenji nori polysaccharide in Examples 2 and 3).

<Confirmation test of protective effect against cigarette smoke on skin to which skin care composition is applied>
The composition of Example 1 was used by four male smokers for one month, and the carbonylated protein level of the stratum corneum was measured before and after use. In particular, it was applied to the "cheeks, fingers, back of hands, and lips" where cigarette smoke would hit, and collected by the tape stripping method. For comparison, non-smokers' cheeks, fingers, back of hands, and lips were also collected and measured by the tape stripping method. In addition, we asked them to answer a questionnaire about their skin condition before and after use.

<Evaluation method of carbonylated protein level>
The tape stripped tape was once transferred to the non-adhesive side of the kraft adhesive tape (paper gum tape), and the tape with a stratum corneum was cut off together with the gum tape. Only the tape with a stratum corneum cut out on a slide glass using tweezers was attached. Only the adhesive of cellophane tape was dissolved in xylene overnight, and then air-dried to transfer only the stratum corneum cells to the slide glass.

To a fluorescent hydrazide (fluorescein-5-thiosemii carbazide, manufactured by Fluka Analytical Co., Ltd.) adjusted to a concentration of 20 μmol / L with a 0.1 mol / L 2-morpholinoethane sulfonic acid-Na (pH 5.5) buffer solution. The tape was immersed to label the carbonyl group of the carbonylated stratum corneum protein. Fluorescence image data acquired with a fluorescence microscope (green light) was analyzed, and the fluorescence intensity per cell area was calculated and used as the carbonyl protein level. The result is shown in FIG.

As shown in the graph of FIG. 1, it was confirmed that smokers significantly increased the production of carbonyl protein as compared with non-smokers. It was confirmed that the carbonyl protein in the cheeks, fingers, back of hands, and lips of smokers who continuously used Sakuran moisturizer was significantly reduced before and after use, and that it was higher than that of non-smokers after 1 month of use. Also had reduced carbonyl protein levels. It was confirmed that the skin care composition of Example 1 effectively prevented the invasion of harmful substances such as active oxygen contained in cigarette smoke and improved the skin condition.

<Questionnaire before and after use>
The changes in the skin condition before and after the application of the skin care composition of Example 1 were evaluated for the degree of dryness and the amount of sebum by the following evaluation methods. The degree of dryness was evaluated as 1 for no change, 2 for slight improvement, 3 for improvement, and 4 for very improvement. The amount of sebum was evaluated as 1 for no change, 2 for a slight decrease, 3 for a decrease, and 4 for a very decrease. The results are shown in Table 1.

表１に示すように、実施例１のスキンケア組成物の使用後には乾燥状態の改善と乾燥によって引き起こされる皮脂の過剰分泌が抑制されたという結果が得られた。

As shown in Table 1, after the use of the skin care composition of Example 1, it was obtained that the dry state was improved and the excessive secretion of sebum caused by the dryness was suppressed.

<Confirmation of the effect of removing harmful substances containing tobacco smoke from the filter>
(Example 2)
_{A semi-dry film F 1 in} which 0.5 g of the composition of Example 1 was poured onto a membrane filter (Merck Millipore 0.45 μm JH) placed in a balance dish (44 × 44 × 15 mm), and lightly dried to remove water. Was prepared. Tobacco smoke passing through the film F ₁ was measured using a hazardous substance removing apparatus for measuring cigarette smoke as shown in FIG. 2 is bubbled through the water. As Comparative Example 1, a membrane filter simply wetted with water was used.
Here, the cigarette toxic substance removing device shown in FIG. 2 is provided with a container A having a bottomed cylindrical shape and two openings a at the top, ion-exchanged water is put inside the container A, and both openings a are filled. Connect the tubes, attach a lit cigarette to _{one side,} and install the film F1 in the middle. A blower pump is connected to the other side, and it is attached so that it is sucked toward the pump side.
The harmful tobacco was connected to the tube flow rate of the pump was adjusted to finish smoke in one / fifth of the speed, the mainstream tobacco smoke passing through the film F ₁ are included in the water in the bubbling containers A The material was analyzed by GCMS analysis. The result is shown in FIG.
As shown in the graph of FIG. 3, in Comparative Example 1, nicotine (detection time 14.01 minutes) and acetaldehyde (detection time 1.50 minutes), which are harmful substances contained in the cigarette smoke detected, were examples. When the filter F1 of _No. 2 was used, it was hardly detected, and it was found that harmful substances were effectively removed.

The analysis conditions for GCMS analysis are as follows.
GC-MS apparatus: Thermo Fisher Scientific GC analysis condition Carrier-gas: helium Flow rate: 1 mL / min
Column: TG-5 SILMS (0.25 mm ID x 30 m x Film 0.25 μm)
Column temperature: 40 ° C (1 min) -5 ° C / min-80 ° C-20 ° C / min-280 ° C (3 min) (injection port: 280 ° C)
Split ratio: 100 mL / min (100: 1)
Sample amount: 1.0 μL
GCMS analysis conditions Ionization method: EI (70eV)
Transfer line temperature: 300 ° C
Ion source temperature: 280 ° C
Target ion: Acetoaldehyde m / z: 29,43,44
Nicotine m / z: 84,133,162

(Example 3)
Defoaming the composition of Example 1, it poured 6g balance dish (44 × 44 × 15mm), a film obtained by drying at 40 ° C. 20 h and _{F 2.} It was measured using a hazardous substance removing apparatus for measuring cigarette smoke, such as tobacco smoke passing through the same way the film F ₂ Example 2 is shown in Figure 1, which is bubbled through the water. As Comparative Example 2, the test was conducted without installing any filter. Hazardous substances contained in the water in the container A in which the cigarette smoke that passed through the film was bubbled were analyzed by GCMS analysis. The result is shown in FIG.
As shown in the graph of FIG. 4, in Comparative Example 2, nicotine (detection time 14.01 minutes) and acetaldehyde (detection time 1.50 minutes), which are harmful substances contained in the cigarette smoke detected in Comparative Example 2, were used in Example 2. When the filter F2 of No. ₁ was used, it was hardly detected, and it was found that harmful substances were effectively removed.

(Example 4)
The surface treatment of the powder with the composition containing Suizenji nori polysaccharide derived from Suizenji nori, which is a freshwater blue-green algae of the present invention, is the same as the method described in Production Example 1 described in JP2013-82649A. It was done. The Suizenji nori polysaccharide solution contained 0.1% of Suizenji nori polysaccharide, 5% of 1,3-butylene glycol, and 44.9% of water, and was mixed with mica at a ratio of 1: 1 for treatment.
<Confirmation of the effect of surface-treated powder on removing harmful substances containing tobacco smoke>
It was prepared which was coated with a surface-treated powder of Example 4 at 0.002g puffs on the membrane filter (Merck Millipore 0.45μm JH) as a film _{F 3.} Was measured using a hazardous substance removing apparatus for measuring cigarette smoke as mainstream tobacco smoke passing through the film F ₃ in the same manner as in Examples 1 and 2 is shown in Figure 1, which is bubbled through the water. As Comparative Example 3, an untreated mica-coated membrane filter was used. Harmful substances mainstream tobacco smoke passing through the film F ₃ is included in the water bubbled vessel A was analyzed by GCMS analysis. The result is shown in FIG.
As shown in the graph of FIG. 5, in Comparative Example 3, nicotine (detection time 14.01 minutes) and acetaldehyde (detection time 1.50 minutes), which are harmful substances contained in the cigarette smoke detected in Comparative Example 3, were used in Example 4. in the case of the film F ₃ using the surface-treated powder of not substantially detected, it was found to effectively remove the harmful substances.

The method for removing harmful substances of the present invention is as simple as applying a skin care composition containing Suizenji nori polysaccharide derived from Suizenji nori, a freshwater cyanobacteria, to the skin to prevent the invasion of harmful substances into the application site. Has sex. Further, since the same effect is observed in the dried composition into a film or surface-treated powder, it is used not only for industrial applications such as filters used in electric and electronic devices but also for cosmetics. In addition to being suitably used, it can also be used, for example, in the fields of pharmaceuticals, medical supplies, and foods.

Claims (3)

A toxic substance removing method that captures the toxic substance from gas / dust containing the toxic substance and protects the skin from the harmful substance, and is a composition containing the following components (a), (b) and (c). A method for removing harmful substances, which comprises attaching a film formed into a film by drying to a target skin portion where protection against harmful substances is desired, thereby capturing the harmful substances without invading the target skin portion.
(A) Suizenji nori polysaccharide derived from Suizenji nori, a freshwater blue-green algae (b) Water (c) Polyhydric alcohol A film containing the following components (a), (b) and (c) is dried to form a film, which is used as a filter to capture the harmful substances from gas / dust containing the harmful substances. Hazardous substance removal method.
(A) Suizenji nori polysaccharide derived from Suizenji nori, a freshwater blue-green algae (b) Water (c) Polyhydric alcohol A column filled with a powder surface-treated with a composition containing the following components (a), (b) and (c) is used as a filter to capture the harmful substances from gas / dust containing the harmful substances. A method for removing harmful substances, which is characterized by doing so.
(A) Suizenji nori polysaccharide derived from Suizenji nori, a freshwater blue-green algae (b) Water (c) Polyhydric alcohol

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