JP2000246277A - Water purifying material using waste containing magnetic component and water purifying method using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a novel water purifying material capable of inexpensively and effectively purifying sewage, sludge or the like of rivers or lakes and marshes and a water purifying method using the same. SOLUTION: Waste containing a magnetic component such as a magnetic card or a magnetic film discharged from a production process or discarded after use is dried by distillation to form carbide which is, in turn, used as a water purifying material. If the water purifying material is immersed in water so as to be partially exposed to the atmosphere, oxygen is efficiently adsorbed from the portion exposed to the atmosphere to increase the amt. of dissolved oxygen in water.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water purification material and a water purification method using a discarded magnetic card, a magnetic film or the like.

[0002]

2. Description of the Related Art Generally, industrial wastewater and domestic wastewater are firstly used.
After undergoing a primary treatment step to easily remove sand and suspended matter contained in the wastewater, it is then subjected to physicochemical and biological treatment and stored in the final sedimentation tank. After advanced treatment by reverse osmosis, etc., it is released to rivers, lakes and marshes. Wastewater and sludge from rivers, lakes, and marshes may be partially subjected to purification treatment such as coagulation sedimentation and coagulation filtration similar to factory wastewater.
The main purification methods are the algae / aqueous plant recovery method, the gravel contact oxidation method, the soil infiltration method and the furnace material filling purification method. However, in rivers, lakes, and marshes, the causes of pollution are wide and diverse, and even if sewerage treatment facilities are widespread, non-point pollution such as pollution derived from chemical fertilizers and pesticides in agricultural crops, At present, treatment technology is not as established as factory wastewater whose pollution cause and mass have been identified because of the large number of variable factors.

[0003] On the other hand, technically established purification methods still have various problems. For example, the activated sludge method, which is a typical biological treatment, involves disposal of surplus sludge that is destined to be destined, the disposal treatment of alternately collected sludge in the dredging method, and the disposal of collected plants in the plant recovery method. In the coagulation sedimentation method, the method of treating and discarding the sediment is a problem, and further, there are problems such as measures against clogging of a filler and an adsorbent such as activated carbon and regeneration treatment. These problems are directly linked to the methods of collection and disposal that can be adopted and the costs involved, and are a decisive factor in the treatment of sewage and sludge from rivers and lakes that are not originally intended for profit.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional circumstances, and an object thereof is to provide a novel method capable of performing water quality purification at low cost and effectively. An object of the present invention is to provide a water purification material and a water purification method.

[0005]

In order to achieve the above object,
The present inventors have conducted intensive studies and have conducted tests and evaluations on the ability of various types of wastes such as industrial wastes and wastes from general households to purify dry carbonized carbides. As a result, magnetic paint products containing magnetic components (magnetic cards, magnetic cards, Film, etc.), the conventional filler
The present invention has been found to exhibit a remarkable water purification ability which cannot be obtained by an adsorbent or a water purification method, and to meet the above-mentioned problem of being able to perform at a low cost.

[0006] If the organic raw material to be carbonized is carbonized by shutting off or restricting the amount of air, carbon having adsorption performance can be obtained. In this case, the carbonization itself becomes porous and active, especially in a state where no activator such as various oxidizing gases (water vapor, carbon dioxide gas) is used. A variety of activated carbons can be obtained depending on the starting materials, and a typical activated carbon is coconut husk charcoal. Pulp waste liquid, synthetic resin waste, organic waste,
In recent years, attention has also been paid to the use of carbonization as a disposal method of waste tires and other so-called industrial wastes, and the utilization of the obtained carbides for various purposes (for example, Japanese Patent Application Laid-Open No. 102480,
JP-A-6-154728, etc.).

[0007] Wastes containing magnetic components, such as used magnetic card products and magnetic paint products, such as used magnetic cards and magnetic films, or magnetic paint products such as magnetic cards and magnetic films discharged in the production process. Is an increasing number of industrial wastes, and their disposal is just beginning to be considered a social problem. However, useful treatment technologies have not yet been established.

[0008] Generally, when carbonizing organic matter, 300 to 1
When the temperature is increased to 000 ° C., the ratio of oxygen and hydrogen decreases, the surface changes from an acidic surface to a basic surface, and the surface has a hydrophilic surface.However, waste containing a magnetic component targeted by the present invention, for example, Magnetic cards (telephone cards, so-called prepaid cards such as automatic ticket gates for transportation, so-called prepaid cards such as cards) and magnetic films (audio tapes, video tapes, etc.) tend to have the same tendency. According to the comparison with the above, it generally has properties as shown in Table 1 below.

[0009]

[Table 1]

From the above results, it can be seen that the waste carbide containing the magnetic component, which is the subject of the present invention, has the same level of adsorption performance and purification performance as or more than coconut shell activated carbon.

That is, according to the present invention,
The gist of the present invention is that waste containing a magnetic component, for example, waste such as a magnetic card and a magnetic film discharged in a production process or discarded after use is carbonized by carbonization and used as a water purification material.

[0012] As described in claim 2, the carbide of claim 1 is selected from the group consisting of zeolite, activated carbon, silica gel, red iron oxide, magnetite, various far-infrared ceramic materials, soil, humus, and carbonized organic waste. One or more selected materials may be combined. Here, the carbonized organic waste is, for example, waste paper, cloth, coffee or juice, tea, liquor, shochu, beer, sugarcane pulp, rice bran, rice husk, or other organic waste.

In a third aspect, the material of the first or second aspect is
It is characterized in that it is hardened with a binder such as Kibushi clay, bentonite, magnesite, lightly burned magnesium, magnesium hydroxide or brown sugar solution and formed into a desired shape. In claim 4, the water purification material according to any one of claims 1 to 3,
A part thereof is exposed to the air and immersed in water, and oxygen is efficiently adsorbed from the part exposed to the air to increase the amount of dissolved oxygen in the water. In claim 5, the water purification material according to claim 1 or 2 is solidified with a binder and formed into an elongated shape, or is filled in a porous elongated case, and the elongated molded product or elongated shape is formed. The case is characterized in that the lower part in the length direction of the case is located at the bottom of a water body to be purified, such as a river or a lake, and the upper part is exposed to the atmosphere and immersed in water.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail.
Pollutants introduced into environmental waters such as rivers and lakes are usually
It gradually precipitates and is adsorbed on the bottom mud, and organic substances are decomposed and mineralized by the action of microorganisms. However, when the mass of the pollutant that is input exceeds the self-purifying action of nature,
For example, the amount of oxygen consumed for decomposition is greater than the amount of oxygen taken in and dissolved by contact with air on the water surface, and the dissolved oxygen in the water becomes deficient, resulting in an anoxic state. Microorganisms cannot be inhabited, and the direction in which contamination proceeds is dominant. Furthermore, nutrients such as nitrogen and phosphorus compounds (ammonium salts, nitrites, nitrates, phosphates, etc.) are indispensable for the growth of animal and phytoplankton, microorganisms, and algae. , Which cause eutrophication phenomena, such as the occurrence of large quantities of blue-green algae and the generation of foul odors.

The present invention has been made to solve these problems.
The purpose is to support and restore the natural purification action of microorganisms, and to biologically purify sewage and sludge in the target water area. The technical elements to achieve the above-mentioned object are:-take in oxygen in the air and always keep the amount of dissolved oxygen low;-fix nitrogen and phosphoric acid and do not make them excessive;・ Provide a place to support the metabolic activity of microorganisms ・ Promote solid-liquid separation (separation of suspended solids and water),
Immediately impart transparency, ・ Recovery of secondary precipitates, etc. due to the treatment itself, and no new substances to be disposed of. ・ Initial investment and maintenance costs are low, and the structure is simple. , Etc. Based on various tests and evaluations by the inventors of the present invention, these technical elements indicate that, in the carbides of industrial waste or general waste containing organic matter, the carbides of wastes containing magnetic components, especially the dry-distilled carbides of magnetic cards containing magnetic components It has been found that this can be achieved by using.

For example, activated carbon adsorbs oxygen at room temperature. Part of the adsorbed oxygen is irreversible adsorption, and is desorbed as carbon oxide only when heated to a high temperature. Activated carbon, when it contains moisture, adsorbs oxygen in the air well. The carbide of the magnetic card according to the present invention, that is, the magnetic card discarded after use is carbonized by carbonization (hereinafter, referred to as “magnetic carbide”) also adsorbs oxygen.

FIG. 4 shows a change in the oxidation-reduction potential (ORP) of test water (sewage) when a normal carbide and a magnetic carbide are used, and when each is submerged in water and a part thereof is exposed to the water surface. It is the result of having measured. Oxidation-reduction potential of test water (OR
P) is about 250 mV, and when a normal carbide is immersed in the test water, the oxidation-reduction potential decreases by 30 to 70 mV. However, when a part of the carbide is exposed to the air above the water surface, the oxidation-reduction potential further decreases. . Similarly, when the magnetic carbide is immersed in the test water, the reduction of the oxidation-reduction potential is 100 to 1
50 mV, much higher than other carbides. Further, it can be seen that the oxidation-reduction potential is further reduced by exposing a part of the magnetic carbide to the atmosphere above the water surface. From this, a kind of air battery is formed by using a magnetic carbide and partially exposing it to the atmosphere above the water surface, and a large potential difference between the magnetic carbide and the sewage (see FIG. 4). In this case, a potential difference of 0.1 to 0.5 V) is assumed to occur. Further, when a metal such as iron is put into the test water, the potential difference between the magnetic carbide and the metal becomes about 1.5 V. The magnetic carbide serves as an anode, absorbs oxygen in the air in an anti-abdominal manner, induces the following reaction in water, and shifts and maintains the hydrogen ion concentration of the sewage to the alkali side.

[0018]

(Equation 1)

This reaction extends to the nitrification process and the denitrification process of ammonia as shown in the following [Equation 2].

[0020]

(Equation 2)

When the magnetic carbide is exposed to the air, the above-described reaction occurs throughout the deep magnetic carbide immersed in water, and the periphery of the magnetic carbide has a low oxidation-reduction potential and is alkaline (pH 8 to 9). It becomes water area. In other words, by immersing a part of the magnetic carbide in water while exposing it to the air above the water surface, the magnetic carbide becomes a supply route of oxygen from the air into the water, and oxidative decomposition of organic substances by aerobic microorganisms Is maintained and promoted. This suppresses a decrease in pH, so that rot of the lower sediment and re-elution of nitrogen and phosphorus are also suppressed. When the oxidation-reduction potential is used as an index, it depends on the electrolyte component of the sewage.
It is presumed that it is preferable to add 炭化 7 wt% or more of magnetic carbide.

In order to supply oxygen to the water, aeration is performed in the activated sludge method, and in other methods, a plastic disk on which a biofilm is attached is rotated (biofilm-attached rotary disk hearth method). In the present invention, as described above, oxygen can be supplied to a deep part of the water only by exposing a part of the magnetic carbide to the atmosphere. In addition, since the raw material is waste, it is inexpensive, and the amount of use is not a constraint. In addition, since the potential is applied, breakthrough phenomena such as clogging in the activated carbon filling tank are suppressed, and the oxygen replenishment function is maintained for a long period of time.

The following can be considered as a mechanism for removing phosphorus by the magnetic carbide. By immersing the magnetic carbide partially exposed to the atmosphere in sewage, the pH becomes 8-9.
, The oxidation-reduction potential decreases by 100 to 150 mV,
Maintaining the dissolved oxygen concentration at 6 to 10 mg / g facilitates the elution of metal ions (eg, iron) from the magnetic carbide. As a result, after a certain period of time after the introduction of the magnetic carbide, the water around the magnetic carbide becomes an aerobic environment, and in an anaerobic environment, phosphate ions released into the sewage are taken into the magnetic carbide and sludge and fixed. Is removed. In addition, the formation of a low redox potential water area creates a concentration gradient of protons and electrons, making phosphate ions more susceptible to oxidative phosphorylation in microbial metabolism and unilaterally accumulating phosphate ions in sludge It does not cause breakthrough.

In addition to this biological removal mechanism, a coagulation-precipitation reaction occurs with metal ions (for example, iron) eluted from magnetic carbides and metal ions dissolved in sewage as shown in the following [Equation 3] to remove phosphorus. It is estimated that.

[0025]

(Equation 3)

At this time, since the pH is maintained at 8 to 9 by immersion of the magnetic carbide, the following equation (4) occurs with suspended particles as nuclei of Ca 2+ ions in the wastewater.

[0027]

(Equation 4)

Thus, the hydroxyapatite is crystallized to remove phosphorus. This reaction is highly pH dependent,
Eight or more are considered optimal. That is, in the present invention, phosphorus can be removed by crystallization precipitation without adding a coagulant such as aluminum sulfate, polyaluminum chloride, ferric chloride, and ferric sulfate. Of course, it is also effective to use it together with ceramics that elute calcium ions.

Further, since the introduction of the magnetic carbide enhances the physiological activity of the microorganism and forms a water region having a low oxidation-reduction potential, the iron ion eluted from the magnetic carbide as shown in the following [Formula 5] Is insoluble Fe (OH) 3
In addition, it is thought that it produces soluble iron ions that are easy for microorganisms to ingest and supports microbial metabolic activities.

[0030]

(Equation 5)

Further, the microorganisms combine with the humic substances contained in the wastewater to become, for example, iron fulvices, and the microorganisms ingest these,
It is considered that nitrate is easily taken up into the body and the microorganism is activated.

The following can be considered as a mechanism for removing nitrogen by the magnetic carbide. By immersing the magnetic carbide partially exposed to the atmosphere in sewage, a high dissolved oxygen concentration can be stably maintained and the nitrification reaction is promoted, but since the pH is high, the following [Equation 6] Reaction occurs.

[0033]

(Equation 6)

Thus, nitrite-type nitrification, which is a biological oxidation of nitrite, becomes dominant, which is extremely advantageous for denitrification. That is, in nitrite respiration, the following reaction (Expression 7) occurs.

[0035]

(Equation 7)

On the other hand, in nitric acid respiration, the following reaction (Equation 8) occurs.

[0037]

(Equation 8)

That is, in nitrite respiration, only a small amount of substrate (hydrogen donor) is required, and an organic substance, which is a BOD component existing in sewage, works effectively as a substrate. Therefore,
The denitrification proceeds without re-inputting a substrate such as alcohol or glucose. Generally, in the nitrification step, acidification proceeds, so ammonium hydroxide or ammonium carbonate is added for neutralization.
According to the present invention, the immersion of the magnetic carbide exposed to the atmosphere alone
H is constantly maintained at 8 to 9, and an extremely favorable environment can be provided for the denitrification reaction.

As described above, according to the present invention, an aerobic environment having a pH of 8 to 9 and a low oxidation-reduction potential is formed in the water around the magnetic carbide, thereby supporting a natural purification mechanism and removing phosphorus and nitrogen.

When applied to rivers and lakes, the location where magnetic carbides are immersed and charged and the density of the magnetic carbides may be set in consideration of the direction of water flow and the level of pollution in the target water area. For example, in the upstream, the immersion density of the magnetic carbide may be increased, and the density may be increased in the downstream. It is also possible to form a movable magnetic carbide unit and change the immersion location according to the situation. Hereinafter, several more detailed embodiments of the present invention will be described with reference to FIGS.

In the example shown in FIG. 1, the above-mentioned magnetic carbide is solidified with a brown sugar solution, sintered and formed into a long shape such as a column or a cylinder. By immersing it in water by locating it at the bottom of a water body to be purified, such as a lake or marsh, and exposing the upper part 3 to the atmosphere, it is possible to easily take in oxygen in the air and supply oxygen to the water.

As shown in FIGS. 2 (a) and 2 (c), a porous long case 4 composed of a wire mesh, a punching plate or the like is filled with a granular magnetic carbide 5 or a massive magnetic carbide 6. (B), the elongated molded article 1 is disposed at the center thereof, or as shown in (d), the elongated molded article 4 is partitioned by a partition 7 inside the elongated case 4. Inner and outer spaces communicating with each other by the holes 8 are formed, and the inner and outer spaces are filled with the magnetic carbides 5 and 6, respectively, and the lower portion of the long case 4 in the longitudinal direction is located at the bottom of the water to be purified such as a river or a lake. ,
And when the upper part is exposed to the atmosphere and immersed in water,
Similar effects can be obtained.

Further, as shown in FIG. 3, a granular magnetic carbide 5 and a massive magnetic carbide 6 are placed in a bag-shaped case 9 made of a netting material, a porous covering material, a water-permeable base material, and the like. Floating body 10 such as a floating ring or buoy
The same effect can be obtained when the lower surface of the bag-shaped case 9 is immersed in the water to be purified, such as a river or a lake, and the upper surface is exposed to the atmosphere. it can.

In the embodiments shown in FIGS. 1 to 3, each of the embodiments shown in FIGS. 1 and 2 has an advantage that oxygen can be supplied up to the depth of the water area to be purified. In addition, the example shown in FIG. 3 has an advantage that the cost can be reduced when deployed in rivers, lakes and marshes. In each of the examples shown in FIGS. 1 to 3, in addition to the magnetic carbides 5 and 6, zeolite, activated carbon, silica gel, red iron oxide, magnetite, various far-infrared ceramic materials, soil, mulch, and organic waste carbide are used. When one or more selected materials are filled, the same or more effects can be obtained. Further, in each of the examples shown in FIGS. 1 to 3, as shown in FIG. 1, a granular or lump-shaped material is placed in a bag-shaped case 11 made of a netting material, a porous covering material, a water-permeable base material, and the like. Even when the bag-like case 11 is filled with the magnetic carbide 12 and immersed in the bottom of a water body to be purified, such as a river or a lake, the same or better effects can be obtained. The addition of these materials depends on the degree of pollution, water quality, geology,
It is arbitrarily selected according to the climate and other various conditions. Although the size of the above-mentioned granular or massive magnetic carbide is not particularly limited, for example, those having a diameter of about 1 to 10 mm and those having a square of 3 to 10 mm can be used.

On the surface of the magnetic carbide of the present invention thus used, a biofilm to which microorganisms are attached is formed,
In addition, countless voids of the magnetic carbide serve as a place where microorganisms live. That is, if nutrients and oxygen are present, aerobic purified microorganisms grow on the surface of the carbide in a gelatinous manner, and soluble organic matter is adsorbed to the aerobic zone biofilm and decomposed and removed by the microorganisms. When oxygen is low, the biofilm in the anaerobic zone becomes dominant, the purification power is lost, and the biofilm also falls off. Since the function of decomposing and purifying microorganisms is an enzymatic action, environmental conditions that enhance biological activity (enzyme activity) may be added to restore and support the natural purifying action.

The evaluation results of the enzyme activity of the magnetic carbide according to the present invention are shown in FIGS. FIG. 5 shows a change in the amount of carbon dioxide gas generated when the magnetic carbide according to the present invention is added to wastewater containing yeast and sucrose. When magnetic carbide is added to ultrapure water, the point of generation of carbon dioxide gas is advanced and the amount of carbon dioxide gas generated is increased. The amount of carbon dioxide generated in sewage is considerably suppressed, but when magnetic carbide is added to the sewage, the degree of carbon dioxide generated becomes as high as that of ultrapure water. This indicates that the magnetic carbide has enzymatic activity. It should be noted that, even when magnetic carbide is not directly added to wastewater but is indirectly contacted with a magnetic carbide spread on the outside of a reaction vessel (beaker), almost the same effect as in the case of direct addition can be obtained. Do you get it.

FIG. 6 shows the changes in the amount of carbon dioxide gas generated and the COD (chemical oxygen demand) when the magnetic carbide according to the present invention is added to the sewage containing sludge and sucrose. From this figure, it can be seen that when the magnetic carbide is added to the sewage, the generation point of the carbon dioxide gas is advanced and the generation amount is increased. It was also found that COD of sewage was reduced from about 8 to 6 mg / l to about 4 to 2 mg / l.

From the measurement results shown in FIGS. 5 and 6, it can be seen that the magnetic carbide according to the present invention shows remarkable enzyme activity.
Furthermore, the magnetic carbide is not directly added to the test system,
The same degree of enzyme activity was also observed when the cells were spread under the beaker and indirectly contacted via the beaker. In other words, it is presumed that a place for supporting the metabolic activity of microorganisms can be provided even if the sewage and the magnetic carbide are not in direct contact.

Sewage and sludge contain substances that inhibit this enzyme activity. These inhibitors generate so-called active enzymes and affect the metabolic activity of the microorganism. The change in the amount of luminescence in the luminol system was measured to determine how much the magnetic carbide suppresses the generation of the active enzyme. FIG. 7 shows the result. It emits light when the chemiluminescent substrate luminol is placed under an enzyme reaction. The amount of light emission is proportional to the amount of free radicals (oxide ions). The amount of light emitted when magnetic carbide is added to ultrapure water and treated is three times greater than the amount of light emitted from ultrapure water alone.
Less than 5%. This has similar effects when treated with silica gel, red iron oxide, or magnetite. This antioxidant power is a catalytic action not found in coconut shell activated carbon. From the measurement results, it is apparent that the magnetic carbide according to the present invention clearly suppresses the generation of active oxygen.

The water of the river in which the blue-green algae is generated is put into a polybucket, and the above-mentioned magnetic carbide is added thereto in an amount of 5 to 7% by weight. Almost no algae appeared and was clear. In some cases, this anti-algal effect was more effective when used in combination with silica gel, magnetite, red iron oxide, soil, and mulch, while it was confirmed that algae were generated with coconut shell activated carbon.

In the separation of sewage sludge, it was confirmed that when the above-mentioned magnetic carbide was added, solid-liquid separation was at least twice as fast as that of coconut husk activated carbon, resulting in a clearer and clearer supernatant liquid. This effect was sometimes enhanced by the combined use with magnetite, red iron oxide, silica gel, soil and humus. Further, in the brown solution in which chicken dung was dissolved, the above-mentioned magnetic carbide showed a remarkable decolorizing effect. It was confirmed that the bamboo vinegar solution and the wood vinegar solution, which are organic acids, exhibit the same decolorizing power as coconut shell activated carbon.

Hereinafter, more detailed embodiments will be described.

Example 1 50 liters of sewage from a certain lake was put into a polybucket, and 5 wt% of a magnetic carbide according to the present invention was added. Purification ability was checked indoors after 10 days and 30 days. Table 2 shows the results.

[0053]

[Table 2]

[0054]

Example 2 1000 ml of phosphate ions in an aqueous solution of poultry manure were evaluated. Phosphate ion in the target liquid is initially 15
When treated with magnetic carbide, the phosphate ion after 10 days was 0 mg / l, and when treated with coconut shell activated carbon, the phosphate ion after 10 days was 10 mg / l. It was 5 mg / l.

[0055]

Example 3 1000 mL of solution containing an anionic surfactant
Was evaluated for adsorption. 0.1 g of dodecylbenzenesulfonic acid and 10 liters of distilled water were dissolved in a polybucket to prepare a 10 ppm anionic surfactant solution, and the effect of adsorbing the activator on the carbide was evaluated. The concentrations in the supernatant of the solution treated with the addition of the coconut shell activated carbon and the solution treated with the addition of the magnetic carbide were both 0.2 ppm or less.

[0056]

Since the present invention is configured as described above, it has the following effects. (Claim 1) A water purification material that carbonizes waste containing a magnetic component to form carbonized material, and can effectively purify rivers, lakes and marshes due to its remarkable adsorptive power and purification ability by magnetic carbides. it can. In addition, since waste containing a magnetic component such as a magnetic card and a magnetic film discharged in the production process or discarded after use is used, a remarkable effect that the purification function can be achieved at a low cost is achieved. (Claim 2) One or two or more materials selected from zeolite, activated carbon, silica gel, red iron oxide, magnetite, various far-infrared ceramic materials, soil, mulch, and carbonized organic waste are optionally added. By combining
It will be possible to respond to the degree of pollution, water quality, geology, climate and other various conditions of the target water area. (Claim 3) The water purification material according to claim 1 or 2 is solidified with a binder and formed into a desired shape, so that the size, depth, water storage amount, and flow volume of the water to be purified, such as rivers and lakes. It can be manufactured and used in an appropriate shape in accordance with various conditions such as water flow rate, degree of pollution, and water quality. (Claim 4) By exposing the magnetic carbide having enzymatic activity to the air, an enzyme supply route to water is formed, the oxidation-reduction potential is reduced, a water area of pH 8-9 is formed, and the surface of the magnetic carbide and An aerobic purification microbial membrane is always maintained inside, and conditions for restoring and supporting the natural purification action can be provided. Therefore, purification of water in rivers and lakes can be performed more effectively. (Claim 5) Since the magnetic carbide can be disposed at the bottom of a target water area such as a river or a lake, purification of sewage and purification of sludge can be performed more effectively.

[Brief description of the drawings]

FIG. 1 is a simplified perspective view showing an example of an embodiment of the present invention, which is partially shown in section.

FIG. 2 is a simplified perspective view showing another example of the embodiment of the present invention, which is partially shown in section.

FIG. 3 is a simplified perspective view showing still another example of the embodiment of the present invention, which is partially shown in section.

FIG. 4 is a graph showing a measurement result of an oxidation-reduction potential when the water purification material of the present invention is used.

FIG. 5 is a graph showing a measurement result of a gas generation amount when the water purification material of the present invention is used.

FIG. 6 is a graph showing measurement results of gas generation amount and COD when the water purification material of the present invention is used.

FIG. 7 is a graph showing a measurement result of a light emission amount ratio when the water purification material of the present invention is used.

[Explanation of symbols]

 1: a long molded product obtained by solidifying a magnetic carbide with a brown sugar solution 4: a long case 5: a granular magnetic carbide 6: a massive magnetic carbide 9, 11: a bag-like case 10: a floating body 12: a granular or massive shape Magnetic carbide

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Takayuki Maruyama 4-6-7 Higashiueno, Taito-ku, Tokyo F-term 4D003 AA01 AA06 AB08 BA07 EA01 EA07 EA14 EA22 EA23 EA24 EA25 4D004 AA07 BA10 CA26 4D024 AA05 AB04 BA02 BA03 BA05 BA06 BA07 BA12 BB01 BB05 BC01 DB15

Claims (5)

[Claims] 1. A water purification material obtained by carbonizing waste containing a magnetic component such as a magnetic card, a magnetic film and the like discharged in a production process or discarded after use as a carbide. 2. Zeolite, activated carbon, silica gel, red iron oxide, magnetite, various far-infrared ceramic materials, soil,
A water purification material obtained by combining one or more materials selected from humus and carbides of organic waste with the carbides according to claim 1. 3. The method according to claim 1, wherein the material is hardened with a binder such as Kibushi clay, bentonite, magnesite, lightly burned magnesium, magnesium hydroxide, or a brown sugar solution and formed into a desired shape.
Or the water purification material according to 2. 4. The water purification material according to claim 1, a part of which is exposed to the air and immersed in water, and oxygen is efficiently adsorbed from the part exposed to the air. A water purification method characterized by increasing the amount of dissolved oxygen in water. 5. The water-purifying material according to claim 1 or 2, wherein the water-purifying material is solidified with a binder and formed into a long shape, or is filled in a porous long case. A method for purifying water, characterized in that a lower part in a length direction of a case is located at a bottom of a water body to be purified such as a river or a lake, and an upper part is exposed to the atmosphere and immersed in water.