KR20230055300A - Composition for eliminating heavy metals comprising the micro-powder of stem bast of cannabis sativa l. - Google Patents

Abstract

The present invention relates to a composition for removing heavy metals containing ultrafine pulverized bast fibers of hemp stems (Cannabis sativa L.) as an active ingredient, and more particularly, to water-coating bast obtained from hemp stems. , It relates to a composition for removing heavy metals containing ultrafine pulverized material prepared by freezing and pulverizing. The ultrafine pulverized hemp stem bast as an active ingredient of the composition for removing heavy metals of the present invention, as demonstrated through the examples of the present specification, is a fiber composition and filtering agent for adsorbing and removing heavy metals from contaminated air and water, heavy metals It has excellent effects that can be used for various purposes such as detergents for removal, detergents and cleaning agents, and furthermore, the ultrafine pulverized product of hemp stem bast of the present invention has excellent thermal stability and has an average particle size of 20 μm, Since it can be manufactured more easily than nano-sized pulverized material, it can be used very usefully in the textile industry, food industry, livestock industry, health industry and cosmetics industry.

Description

Composition for removing heavy metals containing ultrafine pulverized material of hemp stem bast as an active ingredient

The present invention relates to a composition for removing heavy metals containing ultrafine pulverized bast fibers of hemp stems (Cannabis sativa L.) as an active ingredient, and more particularly, to water-coating bast obtained from hemp stems. , It relates to a composition for removing heavy metals containing ultrafine pulverized material prepared by freezing and pulverizing.

For humans, clean air is an indispensable factor for maintaining life. Yellow dust caused by recent desertification of dry regions in northern China and Mongolia has been identified as a serious health hazard because it contains harmful heavy metals such as cadmium, copper, and lead, as well as various harmful bacteria and fungi. In Korea, based on the concentration of yellow dust in the air, yellow dust crisis alerts are classified into 4 stages [attention, caution, vigilance, serious] and efforts are made to secure safety by announcing action guidelines for the public (2016 Ministry of Food and Drug Safety training materials: preparing for yellow dust) Food handling and safety tips). In addition, the use of fossil fuels is rapidly increasing due to the increase in economic activity of the population, and carbon compounds, sulfates, nitrates, and harmful heavy metal compounds generated by combustion are also rapidly increasing. These fine combustion products [fine dust, ultrafine dust (ultrafine dust)] are known to be more harmful than yellow dust because they have a higher heavy metal content than yellow dust and float in the air for a long time.

Particulate Matter (PM) refers to fine dust floating in the air for a long period of time. PM10 with a particle size of 10 μm or less, PM5 with a particle size of 5 μm or less, PM2.5 with a particle size of 2.5 μm or less, and PM2.5 with a particle size of 1 μm or less In this case, it is called PM1. Among these fine dusts, those with a particle size of 2.5 μm or less are called ultrafine dusts, and they can penetrate into the human body through the respiratory tract or through the skin. It is known to cause respiratory system-related diseases and increase the occurrence of cardiovascular-related diseases such as arrhythmia, heart attack, angina pectoris, and myocardial infarction (Kim Oh-shik et al., 2009, ReSEAT analysis report). In addition, fine dust and ultrafine dust have a problem in that they float in the air for a long time and move over long distances due to their fine size, and the effects occur on a large-scale regional basis beyond local effects, and appear for a long period of time. In particular, it is becoming more problematic in dense traffic areas, industrial areas, subways and underground shopping malls, large-scale living complexes, various construction sites, large amusement parks, and department stores (Lee Chang-heup, 2015. Ultrafine dust in Changwon, an industrial city (PM2.5)). A study on the composition and risk assessment of heavy metals, University of Ulsan doctoral dissertation; Lee Dae-woong, 2015. Comparative analysis of fine dust and heavy metal concentrations according to environmental characteristics in Ulsan, University of Ulsan master's thesis).

In Korea, according to the amount of fine dust in the air, it is divided into [good, normal, slightly bad, bad, and very bad], and the fine dust forecast system is implemented, concentrating on securing health and food safety (Ministry of Food and Drug Safety training in 2016. Source: Provision of safety management information by sector in preparation for fine dust and yellow dust).

The components of yellow dust, fine dust, and ultrafine dust vary depending on the cause and region of occurrence, but usually contain 100 to 200 μg/L of heavy metals, and the main heavy metals are copper (Cu), cadmium (Cd), and nickel ( Ni), lead (Pb), and zinc (Zn) have been identified as artificial pollutants (Kwon Woo-jin et al., 2015. Journal of the Korean Society of Earth Sciences, 36, 125-135). Considering that humans breathe an average of 28,800 times a day and represent an average respiratory volume of 0.5 liters per breath (14.400 liters of respiratory volume per day), it can be seen that humans are exposed to up to 1,440 mg of heavy metals per day from breathing. In particular, in the case of heavy metals in fine dust entering the respiratory tract, 74% of cadmium and 42% of lead are known to be absorbed, and the risk is higher than that of heavy metals transferred from food (2014. 2. 26. KBS report; JoongAng Ilbo “Heavy metals in fine dust, carcinogens increase the risk of lung cancer by 22%”).

Heavy metals refer to metals with a specific gravity of 4.0 or higher. Heavy metals harmful to the human body include cadmium, mercury, copper, lead, and nickel. Cadmium, which is detected in high concentrations in fine dust, is a silvery-white metal used in pigment, chemistry, and battery manufacturing. When absorbed into the human body, acute toxicity causes inflammation in the gastric mucosa and causes symptoms such as cough, dizziness, and abdominal pain. shows symptoms of Therefore, it is designated as a toxic substance in the Domestic Air Pollution Prevention Act and the Water Pollution Act, and is designated as a specific toxic substance in the Act on Prevention of Pollution of Soil for Farmland.

In particular, copper has high electrical and thermal conductivity, excellent ductility and malleability, is easy to process, and is inexpensive, so it is used in various industrial fields. Copper is also known to affect brain, liver, and kidney functions and cause mental illness when overexposed. In particular, it reacts with other substances to become a more toxic substance (eg, copper sulfate). Therefore, health problems can occur due to heavy metals exposed in fine dust and living environments, especially harmful heavy metals such as cadmium and copper, and chronic poisoning often occurs due to prolonged exposure to heavy metals including cadmium and copper in industrial settings. .

Recent research on safety measures for fine dust includes a study on identifying the properties, composition, and characteristics of fine dust (Kwon Woo-jin et al., 2015. Journal of the Korean Society of Earth Sciences, 36, 125-135; Lee Chang-heup, 2015. Industrial City Changwon's Elementary School) Research on heavy metal composition and risk assessment of fine dust (PM2.5), University of Ulsan doctoral dissertation; , Related patents include “Microbalance-based fine dust measuring device” in Korean Patent Registration No. 10-1646685 (2016-08-02) and “ultrafine dust” in Korean Patent Registration No. 10-1639265 (2016-07-07). multi-purpose mask”, registered patent No. 10-1655976 (2016-09-02), “air purifier with fine dust purifying function”, registered patent No. 10-1658425 (2016-09-12), “negative ion generator A “fine dust removal device” is disclosed in Registered Patent No. 10-1628076 (2016-06-01).

In addition, as patents related to food and cosmetics that mitigate and prevent fine dust toxicity, Republic of Korea Patent Registration No. 10-1629706 (2016-06-07) peel extract of citrus sunki, bracken ginseng (Sceptridium ternatum or Botrychium ternatum) ) extract and Korthalsella japonica extract, “Composition containing natural plant extracts that alleviate inflammation caused by yellow dust and fine dust”, Registered Patent No. 10-1659456 (2016-09-19) Sanhoe "Functional cream for blocking ultrafine dust" using titanium and seaweed hearing, Patent No. 10-1653189 (2016-08-26), "Cosmetic composition for blocking fine dust", Patent No. 10-1643696 (2016- 07-22) discloses a “cosmetic composition for removing heavy metals and fine dust containing liquorice”, and in Korean Patent Publication No. 10-2014-0124743 (2014-10-27), “continuously foamed organic bellflower ( Tea composition leached from 桔梗 or organic deodeok (沙蔘) and its manufacturing method”, Patent Publication No. 10-2016-0096967 “Health of bronchial disease, immune enhancement and anti-obesity prevention efficacy containing fermented bellflower seeds as an active ingredient” Tea Composition”, Patent Publication No. 10-2009-0011694, “Composition for preventing and treating cadmium poisoning-related diseases containing purified fractions of Jangsaeng Doraji as an active ingredient”, and Patent Publication No. 10-2007-0064211, “Respiratory Disease” Manufacturing method of preventive beverage” is disclosed.

On the other hand, hemp ( Cannabis sativa L. ) is an annual herbaceous plant belonging to the hemp family, and is a dioecious plant fertilized by wind and male and female due to incompleteness. Hemp is known to be native to Central Asia, but C. sativa subsp. sativa, C. sativa subsp. indica and C. sativa subsp. Three species of ruderalis are distributed worldwide. Hemp is one of the plants most closely related to human history, and has been used in various ways such as food, medicine, cosmetics, textiles, and household goods. are receiving

In the oriental medicine and natural medicine sector, seeds (hedgehog) and vegetable oil (hemp oil) have been used to treat intractable constipation, small thirst, menstrual irregularities, skin diseases and dysentery, and the stems are used to relieve bruises and blood clots and to remove stones. , The root (hemp root) is used to treat dystocia and remove blood clots, the leaf (cannabis) to relieve cough and pain as an anesthetic, analgesic and diuretic, and the flower (hemp) is used to relieve paralysis [20] and itching. , flower ears (hemp powder) have been used to treat constipation, gout, insomnia, and dystocia. In addition, hemp has been mainly used for the production of bast fiber from hemp stems due to its unique straight roots and straight stems that grow 2 to 3 m in one month. has been

Hemp stems are divided into outer hull and core, and the hemp core is mainly composed of xylan (19.9%) and klason lignin (23.9%) components, and most of them have been discarded without any specific use until now (Andre CM et al, 2016. Frontiers Plant Sci. V7. Article 19: doi: 10.3389/fpls.2016.00019). The outer skin of the hemp stem can be easily peeled off the stem before or after drying. It can be divided into bast fibers. Hemp bast, which is known to be the toughest of plant fibers, is used in the textile, textile industry, and manufacturing of household goods. In fact, when the outer hull of hemp from which the cobs are removed is pulverized with a normal power crusher (rice straw, thin branch, vine cutter, Georyu Farm, Korea), it is not pulverized, and a part that is wrapped around the grinder is made. It is the bast part of the hemp stem, and when used for textile and textile industries, bast fibers that are not cut as much as possible are required.

As for research related to hemp stems, research on producing yarn by pulling bast fibers from hemp stems has been in progress for a long time (Lee Su-hye, 2011, Silla University doctoral dissertation), and research on using hemp stem scraps as construction materials (Kim Seok-gyu, 2019, Korean Society of Plant Resources Autumn Conference 6), a study on growth conditions and hemp species for optimal production of hemp hemp fiber (Muslo et al., 2019, Frontiers in Plant Sci. doi: 10.3389/fpls.2018.01702) has been reported. . In addition, recently, verification of antioxidant activity for using hemp stem as a cosmetic raw material (Seok Da-young, 2021, Daegu Haany University master's thesis) and antithrombotic activity of hemp stem extract (Kang Deok-gyeong et al., 2021. J Life Sci. 31: 581 -586), research on the use of hemp stems other than fiber and construction is being conducted.

Recently, it has been reported that hemp felt made of hemp fiber and artificial fiber (artificial fiber content 14.68%, thickness 5mm, 665g/m ² ) is excellent in adsorption and removal of heavy metals such as Cu and Co (Mongiovi et al., 2021 Molecules 26: 4199: https://doi.org/10.3390/molecules26144199), a material for heavy metal removal using ultrafine pulverized hemp stems that can remove heavy metals from polluted air and water while being completely decomposed so far has been reported. It has never happened.

On the other hand, as patents related to hemp stems, Korean Patent Registration No. 10-0654968 [Building panel using hemp and lime], No. 10-1443672 [Building finishing material composition using hemp liquid and hemp stems and construction using the same] Method], No. 10-2196652 [Method of manufacturing fiber containing hemp particles], No. 10-0786717 [Method of refining hemp bast fiber using symbiotic microorganisms], and No. 10-0275137 [Method of manufacturing hemp yarn] ] is disclosed, and Patent Publication No. 10-2004-0012216 [Paper using hemp as raw material and method for manufacturing the same], and No. 10-2021-0073155 [Paper for arteriosclerosis containing hemp stem extract as an active ingredient] composition for prevention, improvement or treatment] and the like are disclosed.

Recently, a patent related to a three-dimensional mask (Korean Registered Patent No. 10-1920847, antibacterial, three-dimensional mask filter for filtering PM 2.5 particles that can remove PM2.5 particles from a mask mixed with bamboo fiber and cotton fiber, such as PET/PP, etc.) sheet) has been disclosed, but no material for heavy metal removal using ultrafine pulverized hemp stems capable of removing heavy metals from polluted air and water while being completely decomposed has not been reported.

KR 10-2196651 B KR 10-2181019 B KR 10-2181017 B KR 10-2181018 B KR 10-1920847 B

Mongiovi et al., 2021. Molecules 26: 4199: https://doi.org/10.3390/molecules26144199

The present invention has been made to solve the problems of the prior art as described above, and the problem to be solved in the present invention is to provide a composition for removing heavy metals containing ultrafine pulverized hemp stem bast as an active ingredient.

In order to solve the above problems, the present invention provides a composition for removing heavy metals containing pulverized hemp stem bast as an active ingredient.

The pulverized hemp stem bast is preferably pulverized after water-coating and freezing the hemp stem bast.

The heavy metal is preferably selected from the group consisting of cadmium (Cd), cobalt (Co), copper (Cu), nickel (Ni) and zinc (Zn).

The composition for removing heavy metals is preferably selected from the group consisting of adsorbents, filtering agents, detergents and cleaners.

The ultrafine pulverized hemp stem bast as an active ingredient of the composition for removing heavy metals of the present invention, as demonstrated through the examples of the present specification, is a fiber composition and filtering agent for adsorbing and removing heavy metals from contaminated air and water, heavy metals It has excellent effects that can be used for various purposes such as detergents for removal, detergents and cleaning agents, and furthermore, the ultrafine pulverized product of hemp stem bast of the present invention has excellent thermal stability and has an average particle size of 20 μm, Since it can be manufactured more easily than nano-sized pulverized material, it can be used very usefully in the textile industry, food industry, livestock industry, health industry and cosmetics industry.

1 is a photographic view of a whole hemp stem, a hemp stem cob, and a hemp stem bast used in an embodiment of the present invention before pulverization and a photograph of pulverized ultrafine particles after pulverization.
2 is a particle size distribution diagram of ultrafine pulverized products after pulverization of the whole hemp stem (top), the hemp stem cob (middle), and the hemp stem bast (bottom) used in Examples of the present invention.
3 is an optical micrograph of the ultrafine pulverized product after pulverizing the entire hemp stem, the hemp stem cob, and the hemp stem bast used in Examples of the present invention.
4 is an electron microscope photographic view of the ultra-fine pulverized product after pulverizing the entire hemp stem, the hemp stem cob, and the hemp stem bast used in Examples of the present invention.

Hereinafter, the present invention will be described in detail.

The inventors of the present invention prepared fine particle pulverized products from whole mature hemp stems, hemp stem cobs, and hemp stem bast, respectively, in order to test the ability to adsorb and remove heavy metals from cannabis stems, and their adsorption and removal activities for various heavy metals. was evaluated.

Specifically, first, mature hemp stems were recovered and dried, and then the outer husk was peeled off to separate the inner husk and the husk, and the outer hull of hemp was put into a general rotary shredder (power crusher) to recover bast fibers that were not crushed and tangled on the blade. did Thereafter, the entire prepared hemp stem, hemp stem core, and hemp stem bast are water-coated by spraying water, frozen at -20 ° C, and then first pulverized with a multi-purpose grinder (DSMP-370, Deoksan, Korea). Each ultra-fine pulverized product was prepared by pulverizing to an average particle size of 20 μm with a fine pulverizer (DSCH-550-S, Deoksan, Korea). After adding 0.1% of each of the prepared ultrafine pulverized materials to a solution containing various heavy metals at a concentration of 10 ppm, shaking for 30 minutes, and evaluating the residual heavy metal content of the experimental solution after removing the ultrafine pulverized material, hemp stem The ultrafine pulverized whole and hemp stem cobs showed good heavy metal removal ability, but the best removal activity was confirmed in the ultrafine pulverized cannabis stem bast. At this time, as a control, domestic commercially available activated carbon (Osung Envitec, KB-G, Norit-Active Carbon) was used at the same concentration, and the heavy metal adsorption and removal ability was lower than that of the entire hemp stem, hemp stem core, and ultrafine pulverized hemp stem bast. It became.

Accordingly, the present invention provides a composition for removing heavy metals containing pulverized hemp stem bast as an active ingredient.

The recovery method of the hemp stem bast is as follows. First, mature hemp stems are recovered and dried, then the outer hull is peeled off to separate the inner husk and the husk, and the outer hull of hemp is put in a general rotary crusher (power crusher) to recover the part that is not crushed and clumped on the blade as hemp stem bast. can

The pulverized hemp stem bast is preferably pulverized after water-coating and freezing the hemp stem bast.

The method for preparing the pulverized product of the hemp stem bast is as follows. First, water is sprayed on the prepared hemp stem bast to coat it with water, it is frozen at -20 ° C, and then it is first pulverized with a multi-purpose grinder (DSMP-370, Deoksan, Korea), and then ultra-fine grinder (DSCH-550-S, Deoksan, Korea) can be ground to an average particle size of 20 μm to prepare ultra-fine pulverized hemp stem bast.

The heavy metal is preferably selected from the group consisting of cadmium (Cd), cobalt (Co), copper (Cu), nickel (Ni), and zinc (Zn).

The ultra-fine pulverized hemp stem bast of the present invention maintains heavy metal adsorption and removal activity even at 100°C heat treatment.

The composition for removing heavy metals is preferably selected from the group consisting of adsorbents, filtering agents, detergents and cleaners.

As a preferred embodiment, the adsorbent and filtering agent of the present invention may be an adsorption membrane, an adsorption filter, a filtration membrane, a filtration filter, and the like.

As a preferred embodiment, the detergent of the present invention may be a detergent for clothes, dish detergent, food detergent, and home appliance detergent. Since the composition of the present invention is a natural component and is not harmful to the human body, more preferably, it can be used for cleaning or imparting antibacterial properties to various household products including kitchen utensils or food washing.

The detergent may further include appropriately selected additives depending on the purpose and purpose of use, and may be mixed with other active ingredients such as commonly used detergents or additives such as pigments, surfactants, and preservatives. The detergent may be prepared by powdering, granulating, tableting or liquefying depending on the purpose and purpose of use, and a conventional method may be used for packaging for commercialization.

In addition, the amount of the composition for removing heavy metals in the detergent may be appropriately used depending on the purpose of use, application form, application area, application target product, etc., for example, may include 0.01 part by weight to 50 parts by weight based on the total composition, The content of the composition for removing heavy metals is not limited thereto. Since the composition for removing heavy metals of the present invention is a natural component and is not harmful to the human body, it can be used in various amounts if the purpose of application can be achieved due to the nature of the product.

As a preferred embodiment, the cleanser of the present invention can be used as a hand, mouth, or feminine cleanser in a simple way in daily life. Since the composition is a natural component and is not harmful to the human body, it can be safely applied even when used as a hand, oral, and feminine cleaner.

The cleaner may further include other additives appropriately selected according to the purpose and purpose of use, and may be mixed with other active ingredients such as commonly used additives or additives such as pigments, surfactants, and preservatives. . The cleaner may be prepared by powdering, granulating, tableting or liquefying depending on the purpose and purpose of use, but in the case of a liquid type, convenient use will be possible.

In addition, the amount of the composition in the cleaner may be appropriately used depending on the purpose of use, application form, application area, etc., for example, may include 0.01 part by weight to 50 parts by weight based on the total composition, but the content of the composition is limited thereto. it is not going to be Since the composition of the present invention is a natural component and is not harmful to the human body, it can be used in various amounts if the purpose of application can be achieved due to the nature of the product.

Hereinafter, the present invention will be described in more detail through examples. The following examples are only one preferred embodiment of the present invention, and the scope of the present invention is not limited to the scope of the following examples.

[Example]

Example 1: Preparation of ultrafine pulverized products of whole hemp stems, hemp stem cobs and hemp stem bast

In 2021, hemp mature stems cultivated in Andong, Gyeongbuk were recovered, foreign substances were removed, and the entire hemp stem was dried in the shade. In addition, when the entire hemp stem was pulverized with a general rotary crusher (power crusher), the fiber portion that was not pulverized and tangled in the blade was recovered to make hemp stem bast. The entire dried hemp stem, hemp stem cob, and hemp stem bast were first pulverized with a multi-purpose grinder (DSMP-370, Deoksan, Korea) to produce particles of about 50 mesh, and then each recovered powder was sprayed with moisture After water coating and freezing at -20℃, it is pulverized with a stone-type ultra-fine grinder (DSCH-550-S, Deoksan, Korea) to an average particle size of about 20μm, and then dried to obtain the whole hemp stem, hemp stem cobs, and hemp Stem bast ultrafine pulverized material was recovered (FIG. 1). At this time, as a result of measuring the particle size distribution of the prepared ultrafine pulverized material using a particle size analyzer (Mastersize 3000, Malvern Co., UK), it was confirmed that the average size was 20 μm (FIG. 2).

Example 2: Forms of ultra-fine pulverized products of whole hemp stems, hemp stem cobs and hemp stem bast

An optical microscope (CH-2. Olympus Optical Co., Japan) photograph of the ultrafine pulverized product of the whole hemp stem, the hemp stem cob, and the hemp stem bast prepared in Example 1 is shown in FIG. 3 . Particles of various sizes and some fibers were identified in the whole hemp stem, and even particle powder was confirmed due to xylan and lignin components in the cob of hemp stem. In the case of hemp bast, long fibers were partially identified. In addition, in the scanning electron microscope (Scanning Electron Microscope, VEGA II LMU, TESCAN s.r.o, Czech Republic @ Raith, Germany) speculum, cellulose and pulverized cobs were distributed in the entire hemp stem, and some fibrous bundles were found in the bast of the hemp stem. It was found that it exists in a state that is not pulverized into fine particles (FIG. 4). In the case of activated carbon (Nirot Activated Carbon, KB-G, average particle size 20 μm, Osung Envitech, Korea) used as a control, it was confirmed that there was a difference from hemp stem bast by showing the appearance of a typical carbonized charcoal.

Example 3: Evaluation of heavy metal removal ability of ultrafine pulverized products of whole hemp stems, hemp stem cobs and hemp stem bast

The heavy metal removal ability of the ultrafine pulverized products of the whole cannabis stem, the cob of the cannabis stem and the bast of the cannabis stem prepared in Example 1 was evaluated, and the results are shown in Table 1. 0.1% of ultrafine pulverized whole hemp stems, hemp stem cobs, and hemp stem bast were added to the Cd, Co, Cu, Ni, and Zn solutions adjusted to 10 ppm in distilled water, respectively, and left for 30 minutes. The residual heavy metal content of the solution was measured by ICP-AES (inductively coupled plasma-emission spectrometer: Agilent 720 series, RF generator frequency: 40 MHz, Optical system: purged Echelle polychromator, Plasma viewing: Automatic plasma axial viewing, Wavelength range: 167- 785 nm).

As a result, as shown in Table 1, in the case of no treatment, the initially administered 10 ppm of heavy metals (Cd, Co, Cu, Ni, Zn) was not removed and confirmed in the solution, but the entire hemp stem, hemp stem cobs and When 0.1% of ultrafine pulverized hemp stem bast was added, it was confirmed that heavy metals were significantly removed from the solution to which 10 ppm was initially added. In particular, when the ultrafine pulverized hemp stem bast was added, the heavy metal removal ability was very excellent compared to the case where the whole hemp stem and the ultrafine pulverized hemp stem cobs were added. At this time, heavy metals with high removal efficiency appeared in the order of Cu > Cd > Zn > Co > Ni. On the other hand, in the case of activated carbon used as a control group, heavy metal removal was recognized, but insignificant heavy metal removal ability was shown compared to the untreated group. Therefore, it was confirmed that the ultrafine pulverized product of cannabis stem bast showed the best heavy metal removal ability.

[Table 1] Evaluation of heavy metal removal ability of ultrafine pulverized products of whole hemp stems, hemp stem cobs and hemp stem bast (remaining heavy metal concentration in solution: ppm)

Example 4: Thermal stability evaluation of ultrafine pulverized hemp stem bast

In the case of the ultrafine pulverized hemp stem bast in Example 1, excellent heavy metal removal ability was maintained even when heat treatment was performed at 100 ° C. for 1 hour and at 121 ° C. for 30 minutes. Therefore, the ultrafine pulverized product of hemp stem bast can be used directly for textiles and household goods manufacturing that require a high-temperature treatment process, and it is judged that it will be suitable for use in harmful heavy metals and water purifier filters contaminated with harmful heavy metals.

[R&D task]

- Name of department in charge: Andong City

- Research management institution: Andong City Agricultural Technology Center

- Research Project Name: 2021 Agricultural Industry Field Difficulty Technology Development Task

- Research project title: Evaluation of useful physiological activity of hemp stem bast

- Contribution rate: 100%

- Research period: 2021.04.15. - 2021.10.14.

- Supervisor: Hemp & R Bio, an agricultural corporation

- Research organization: Department of Food and Nutrition, Andong National University

Claims (4)

A composition for removing heavy metals containing pulverized hemp stem bast as an active ingredient. The composition for removing heavy metals according to claim 1, wherein the pulverized hemp stem bast is pulverized after water-coating and freezing the hemp stem bast. The heavy metal removal composition according to claim 1, wherein the heavy metal is selected from the group consisting of cadmium (Cd), cobalt (Co), copper (Cu), nickel (Ni) and zinc (Zn). The composition for removing heavy metals according to any one of claims 1 to 3, wherein the composition for removing heavy metals is selected from the group consisting of adsorbents, filtering agents, detergents and cleaners.

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