JP2002119850A - Environment purifying material and its manufacturing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an environment purifying material of low price made from natural plants present in the natural world and its manufacturing method. SOLUTION: Kenaf charcoal, which is obtained by carbonizing kenaf and is consisting essentially of carbon, is used as the environment purifying material as it is or after cutting to prescribed size. Further the method for manufacturing the environment purifying material is distinguished by that the kenaf is carbonized in a constructed kiln (a charcoal kiln) in the same way as a common charcoal making method in the constructed kiln to obtain a solid product (kenaf charcoal) and then the solid product is cut to specific size.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to an environmental purification material,
In particular, the present invention relates to an environment-purifying material that is effective for purifying water and removing harmful substances in the atmosphere using kenaf charcoal as an active ingredient and a method for producing the same.

[0002]

2. Description of the Related Art Conventionally, a method using a physical adsorbent such as activated carbon and zeolite as an environmental purifying agent for removing various odors and harmful substances generated from a living environment and purifying wastewater, an alkaline solution and the like. Known chemical cleaning and deodorizing methods using chemicals, methods using ion-exchange resins and other chemical adsorbents, biological deodorizing methods such as soil deodorizing methods and activated sludge, and methods using ozone are known. Various methods are adopted accordingly.

However, since various odors are often compounded in daily life, it is difficult to make a deodorizing device that effectively acts on these odors inexpensive and free from secondary pollution. . When the above-described physical adsorbent or chemical cleaning agent is used, it is difficult to treat the waste material after removing the offensive odor, and depending on the treatment method, secondary pollution may be caused. In particular, considering the living environment problem in the future, it is desirable to use a natural material existing in nature as a raw material used for the deodorant from the viewpoint of pollution prevention.

Among them, activated carbon is a charcoal mainly composed of carbon obtained by carbonizing wood as a natural material.
Furthermore, it is activated by steam activation, chemical activation, or other activation means, and is particularly widely used as a catalyst, a purification material, various other environmental purification materials, etc. because of its particularly high adsorptivity. However, such activated carbon is disadvantageous in that it is costly in terms of both wood resources and activation processing.
There is a need for the development of a less expensive and better alternative to this.

[0005]

SUMMARY OF THE INVENTION In view of the above, the present invention solves the problems of various conventional deodorizers, and provides an inexpensive and excellent method using natural plants existing in nature as raw materials. It is intended to provide an environmental purification agent.

[0006]

The present inventors have conducted various studies to solve the above-mentioned problems, and as a result, have found that kenaf charcoal is an excellent environmental purification material, and have completed the present invention. That is, the environmental purification material of the present invention is characterized in that a solid product obtained by carbonizing kenaf (kenaf charcoal) is cut as it is or to a predetermined size.

The environmental purification material of the present invention exhibits excellent effects when used for water quality purification or for deodorizing or removing harmful substances in the air. Further, the method for producing an environmental purification material of the present invention is characterized in that kenaf is carbonized in a kiln (charcoal kiln) in the same manner as a general charcoal making method of charcoal to form a solid product (kenaf charcoal). It is characterized by being cut to the size of.

[0008]

Embodiments of the present invention will be described below in detail. The kenaf used in the present invention is an annual plant of the family Malvaceae, which is the same family as hibiscus, etc., and grows fast. It grows about 10cm a day. As such, kenaf has a high photosynthetic rate and can absorb a large amount of carbon dioxide.Therefore, kenaf has attracted attention as one of the means to simultaneously solve global environmental problems such as global warming and deforestation caused by carbon dioxide, and is cultivated in various fields. Is coming. Kenaf grows fast and is rich in fiber,
In the 1960s, it was selected and used in the United States as a raw material for pulp and paper replacing wood.

In the present invention, the kenaf is carbonized in the same manner as in a general charcoal making method using a charcoal kiln to form a solid product (kenaf charcoal), which is then cut into a specific size and used as an environmental purification material. It is. First, an example of a method for producing kenaf charcoal will be described. -Remove the branches, roots, etc. from the cut kenaf and cut it to an appropriate length to adjust.・ The adjusted kenaf is packed in a kiln and carbonized in the same manner as in the general kiln charcoal making method. In this case, kenaf alone may be packed and carbonized in the construction kiln, but if kenaf is packed and carbonized with other trees (Mokumau), from the confirmation of the carbonization degree of other trees,
It is particularly preferable in that it serves as a scale for determining the degree of carbonization of kenaf.

[0010] In this case, usually, the kiln opening is closed and carbonization is performed while leaving ventilation holes. The carbonization temperature is about 300-500 ° C,
The final stage of carbonization is 700-800 ° C. (at the time of nap), and the carbonization time is 1 to 2 days for short and 2 weeks for long. -At the end of carbonization, the kiln is closed and the fire is extinguished. After cooling, the kiln opening is opened to remove the carbonized solid product (kenaf charcoal).・ Kenaf charcoal obtained as above is cut to a specific size as it is, crushed or crushed into powder,
It can be used as an environmental purification material. After finely pulverizing kenaf charcoal, the charcoal can be formed into a certain particle size by using a suitable binder such as tar or pitch, and then dried and used.

According to the analysis of the present inventors, the following facts have been confirmed. Kenaf charcoal is lighter, has a larger specific surface area, and has better transportability than charcoal. The water purification ability (chlorine, iron) of kenaf charcoal has a higher ability than that of charcoal, and is considered to be particularly useful for purifying drinking water and the like. The ability of kenaf charcoal to adsorb harmful substances (acetaldehyde, etc.) in the atmosphere is considered to exert an excellent effect as well as the ability to purify water.

Therefore, the environmental purification material of the present invention can be obtained at a low cost as an environmental purification material equivalent to or somewhat superior to charcoal. Especially for water purification (dewatering of tap water, tap water, groundwater,
Deodorization, debasing, deironing, decontamination, etc.), wastewater treatment (phenol removal, etc.), air odor deodorization (refrigerator deodorization, deodorization of volatile gas emitted from indoor wall material paint etc.) , Air purification, etc.), and other various fields such as decolorization, deodorization, and purification of industrial products.

[0013]

Hereinafter, the present invention will be described with reference to examples.
The present invention is not limited by these examples. The kenaf charcoal used in the following examples was kenaf charcoal separated from other charcoal after carbonizing kenaf together with other wood in a kiln (charcoal kiln) in the same manner as a general charcoal making method. The analysis results are shown in Table 1 below together with the kenaf wood and charcoal (Bincho charcoal).

[0014]

[Table 1]

From the results in Table 1, a) the water content is about three times that of charcoal. B) The ash content is about four times that of charcoal. C)
Carbon is about 10% lower than charcoal. D) Hydrogen is about four times that of charcoal. Further, as a result of comparison with micrographs, a) airtightness is lower than that of charcoal and specific surface area is large. B) It was found that the hardness was lower and lighter than charcoal.

Example 1 An experiment was conducted on the water purification ability of the above kenaf coal with respect to the Cl (chlorine) concentration in the following manner.・ Water volume: 500 ml ・ Cl concentration: 10 mg / L ・ Test material: Kenaf charcoal, Bincho charcoal and charcoal charcoal
Table 2 shows the results of measuring the water purification ability of each test material by measuring the Cl concentration at each 2.5 g elapsed time, and the graph is shown in FIG. (However, BL indicates the case where the test material was not added. The same applies hereinafter.) From this result, in the case of kenaf charcoal, the initial Cl concentration was 10 mg.
/ L is 0.1 mg / L or less after 24 hours, whereas that of Bincho charcoal is 7.5 mg / L, indicating that the water purification ability of kenaf charcoal is extremely excellent.

[0017]

[Table 2]

Example 2 The same conditions as in Example 1 were used except that the initial Cl concentration of 10 mg / L in Example 1 was changed to 500 mg / L.
Table 3 shows the results of measuring the water purification ability of each test material by measuring the Cl concentration for each elapsed time, and FIG. 2 shows a graph thereof. From the results in Table 3, the kenaf charcoal has the initial Cl
The concentration of 500 mg / L was 0.1 mg / L or less after 120 hours, whereas the concentrations of Bincho charcoal and driftwood charcoal were 150 mg / L, respectively, indicating that the water purification ability of kenaf charcoal was extremely excellent.

[0019]

[Table 3]

Example 3 The following investigation was conducted on the water purification ability of the above kenaf charcoal for Fe-containing water.・ Water volume: 500 ml ・ Fe content concentration: 5 mg / L ・ Test material: Kenaf charcoal, Bincho charcoal, driftwood charcoal 2.5 g each The Fe content concentration was measured at each elapsed time, and the water purification ability of each test material was measured. Table 4 shows the results. In the purification test of Fe-containing water, the initial Fe concentration of 5 mg / L was 1 mg / L or less after 48 hours for both kenaf charcoal and Bincho charcoal, whereas that of driftwood charcoal was 3 mg / L.
It can be seen that kenaf charcoal has excellent water purification ability.

[0021]

[Table 4]

Example 4 An experiment was conducted on the deodorizing and purifying ability of the above kenaf charcoal with respect to the aldehyde concentration in the air in the following manner. Acetaldehyde was re-injected on the way.・ Capacity: 5 L of air ・ Substance concentration: 20 ppm of acedaldehyde ・ Test material: Kenaf chip, kenaf charcoal 10 g each For each elapsed time, the concentration of acedaldehyde in the air was measured, and the deodorizing and purifying ability of each test material was measured. Table 5 shows the results
FIG. 2 shows the graph. From these results, it was found that in the case of kenaf charcoal, the initial 20 ppm of acedaldehyde immediately after the re-injection of acedaldehyde was 1 ppm or less, whereas in the case of kenaf chips and Bincho charcoal, the acedaldehyde concentration was completely maintained even after being left for a long time. Cannot be reduced to This shows that kenaf charcoal has extremely excellent deodorizing and purifying ability for acedaldehyde.

[0023]

[Table 5]

Example 5 An experiment was conducted on the deodorizing and purifying ability of the above kenaf charcoal with respect to the concentration of acetaldehyde in the air in the following manner.・ Capacity: 5L of air ・ Substance concentration: 20ppm of acetaldehyde ・ Test material: Kenaf chips, kenaf charcoal, Bincho charcoal 10 each
g The acetaldehyde concentration was measured at each elapsed time, and the deodorizing and purifying ability of each test material was measured. The results are shown in Table 5, and the graph is shown in FIG. These results show that kenaf charcoal immediately adsorbs acetaldehyde immediately after injection. The adsorption speed and the adsorption amount were: kenaf charcoal> bincho charcoal> kenaf chip.

[0025]

[Table 6]

[0026]

According to the present invention described above, kenaf, which grows quickly as an annual plant and is harvested in large quantities every year, is carbonized in a construction kiln (charcoal kiln) in the same manner as in the general charcoal making method of ordinary charcoal. To obtain cheaper and safer environmental purification material than other charcoal by just cutting the product (kenaf charcoal) without any activation means such as activated carbon or by cutting it appropriately Can be. Such an environmental purification material of the present invention,
In particular, it can be effectively used in various fields such as water purification, deodorization in the atmosphere, and removal of harmful substances.

[Brief description of the drawings]

FIG. 1 is a graph showing the results of water purification performance of each test material in Example 1.

FIG. 2 is a graph showing the results of water purification performance of each test material in Example 2.

FIG. 3 is a graph showing the deodorizing and purifying ability in air of each test material in Example 4.

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Koichiro Maeda 4-5-2 Kudankita, Chiyoda-ku, Tokyo F-term in the Electric Power Plant Environmental Greening Center Co., Ltd. 4C080 AA05 BB02 BB04 CC01 CC12 HH05 JJ01 KK08 LL02 MM05 QQ03 4D024 AA01 AA04 AB11 AB16 BA03 BB01 BC01 4G066 AA04B CA02 CA10 CA31 CA46 CA52 DA03 DA07 DA08 FA23 FA25

Claims (4)

[Claims] 1. An environment-purifying material obtained by cutting a solid product obtained by carbonizing kenaf (kenaf charcoal) as it is or by cutting it into a predetermined size. 2. The environmental purification material according to claim 1, which is used for water purification. 3. The environmental purification material according to claim 1, which is used for deodorizing an odor in the atmosphere or removing harmful substances. 4. A method in which kenaf is carbonized in a kiln (charcoal kiln) in the same manner as in a general charcoal making method for charcoal, to produce a solid product (kenaf charcoal), and then cut to a specific size. Manufacturing method of environmental purification material.