KR102147711B1 - Composition for Preventing Dust Scattering and Method to Prevent Dust from Scattering Using the Same - Google Patents

Abstract

Provided is a dust suppressant composition which includes 98 to 99.9% by weight of magnesium chloride and 0.1 to 2% by weight of sodium hypochlorite as active ingredients and is an aqueous solution having a concentration of 20-40 wt%. The composition maintains soil moisture for a long time and stabilizes dust by mixing a divalent metal chloride and sodium hypochlorite in a certain ratio, preparing it at a certain concentration, and treating it.

Description

Composition for Preventing Dust Scattering and Method to Prevent Dust from Scattering Using the Same}

The present invention relates to a dust suppression composition capable of protecting a human body from dust inhaled through the respiratory tract by maintaining moisture in soil for a long period of time and stabilizing dust to suppress dust generated in various places, and a dust suppression method using the same.

Dust that is discharged to the atmosphere without a certain outlet is called fugitive dust, and although the amount of fugitive dust contains many uncertainties, it is estimated that the emission has a profound effect on the amount of fine dust in the atmosphere. For example, it is known that the amount of fugitive dust discharged from school grounds amounts to 50% of the amount of fugitive dust discharged from construction sites. Of course, since the school grounds and trees around the school grounds act as windbreaks, it is judged that the actual emissions may be higher than the estimated emissions from this test. In Table 1 below, the composition ratio (%) of scattered dust elements was compared and described.

element Residential area
Elementary School Elementary School in Industrial Area Residential industrial area
Elementary School Al (aluminum) 12.13 16.36 9.10 Ca (calcium) 17.82 12.84 9.18 Fe (iron) 54.60 56.84 66.72 Mg (magnesium) 1.41 0.46 0.58 K (potassium) 1.45 1.48 0.75 Na (sodium) 0.70 0.47 0.68 S (yellow) 0.23 0.44 0.14 Ti (thallium) 5.88 6.33 4.37 Cd (cadmium) 0.00 0.00 0.00 Cr (chrome) 0.33 0.25 0.87 Cu (copper) 0.38 0.20 1.20 Pb (lead) 0.09 0.22 0.37 Mn (manganese) 1.40 1.22 2.05 V (vanadium) 0.08 0.11 0.09 Zn (zinc) 1.89 0.88 3.04 Ba (barium) 1.26 1.33 0.63 Co (cobalt) 0.03 0.02 0.01 Mo (molybdenum) 0.03 0.06 0.05 Ni (nickel) 0.06 0.07 0.26 Sr (strontium) 0.24 0.22 0.14

Recently, the yellow dust flying from China to Korea is also on the rise, and the number of respiratory patients is on the rise. Yellow dust is a naturally occurring phenomenon. There is no way to fundamentally suppress this, but air pollutants discharged from the process of industrialization in China may be introduced along with yellow dust, so it must be dealt with in order to suppress this. Measures to reduce pollutants should be taken, the cause of the increase in yellow dust and the impact of damage should be investigated, and measures should be taken. Research is being conducted on the effects of yellow dust and long-distance air pollutants on Korea and reduction measures. In addition, it is planning to grasp the long-term trend through analysis of heavy metals and ionic components among yellow dust dust every year.

Throughout this specification, a number of patent documents are referenced and citations thereof are indicated. The disclosure contents of the cited patent documents are incorporated by reference in this specification as a whole, and the level of the technical field to which the present invention belongs and the contents of the present invention are more clearly described.

The present inventors have tried to develop a dust suppressant to protect the human body from dust inhaled through the respiratory tract by suppressing the generation of dust (or dust containing harmful substances) generated in school playgrounds, construction fields, or tennis courts. As a result, magnesium chloride and sodium hypochlorite were mixed at a certain ratio, prepared at a certain concentration, and treated to maintain moisture in the soil for a long period of time, stabilize dust, and at the same time confirm that the disinfecting effect is excellent, thereby completing the present invention. .

Accordingly, an object of the present invention is to provide a dust suppressant composition.

Another object of the present invention is to provide a dust suppression method using the dust suppression composition described above.

Other objects and advantages of the present invention will become more apparent by the following detailed description, claims and drawings.

According to an aspect of the present invention, the present invention is a dust suppressant composition comprising magnesium chloride 98 to 99.9% by weight and sodium hypochlorite 0.1 to 2% by weight as active ingredients, and an aqueous solution having a concentration of 20 to 40% by weight Provides.

The present inventors have tried to develop a dust suppressant to protect the human body from dust inhaled through the respiratory tract by suppressing the generation of dust (or dust containing harmful substances) generated in school playgrounds, construction fields, or tennis courts. As a result, it was confirmed that magnesium chloride and sodium hypochlorite were mixed at a certain ratio, prepared at a certain concentration, and treated to maintain moisture in the soil for a long time, stabilize dust, and at the same time have excellent disinfection effects.

As used herein, the term "dust suppressant" means stabilizing dust to prevent scattering of dust.

According to a preferred embodiment of the present invention, sodium hypochlorite used as an active ingredient of the present invention is a water-soluble substance having a formula of NaOCl, and is usually used as a sterilization and bleaching agent. When such sodium hypochlorite is used as a component of the dust suppression composition, it additionally provides a sterilization and disinfection function with respect to the dust suppression performance of the composition. In particular, when used in combination with magnesium chloride in a predetermined ratio, it absorbs moisture in the atmosphere to more efficiently control dust generation on the ground of a playground, while providing a sterilizing and disinfecting effect to provide a safer environment.

According to an embodiment of the present invention, the magnesium chloride used as an active ingredient of the present invention is used in an amount of 98 to 99.9% by weight, preferably 99.0% by weight, and it provides effective dust suppression ability in this range.

According to an embodiment of the present invention, the sodium hypochlorite used as an active ingredient of the present invention is used in an amount of 0.1 to 2% by weight, preferably 1% by weight, and has effective dust suppression and disinfection effect in this range. Will be provided.

The dust suppressant composition of the present invention has an excellent effect of strongly controlling dust generation by absorbing moisture in the atmosphere at the same time as spraying with a strong adsorption power when spraying on the ground of the playground that generates dust and maintaining adequate moisture. The deliquescent property absorbing water in the following Experimental Example 2, and the effect of controlling the generation of dust by maintaining the moisture is clearly demonstrated by the following Experimental Examples 3 to 6.

In addition, as can be seen in Experimental Example 1 below, the dust suppressant composition of the present invention can be stored even in winter because it has a freezing point of -22°C or less, and can be used on dry ground in winter, and can achieve additional effects as a snow removal agent. I can.

As the most preferred embodiment of the present invention, the composition of the present invention is an aqueous solution containing 98 to 99.9% by weight of magnesium chloride (MgCl ₂ ) and 0.1 to 2% by weight of sodium hypochlorite as active ingredients, and having a concentration of 20 to 40% by weight . When the content and concentration of the active ingredient are outside the above range, there is a problem that the effect of absorbing moisture and maintaining moisture in the atmosphere is weaker than the above range.

The dust suppressant composition of the present invention not only has the property of absorbing moisture in the atmosphere of the composition, but also has the property of forming oxycycloid cement by reacting with the soil, thereby strengthening the ground and stabilizing the ground. Achieve the effect.

In addition, since the chlorine ions contained in the composition of the present invention move more freely than calcium ions in the soil, the amount of chlorine ions contained in the playground soil dust and dust stabilizer is similar to the amount of chlorine ions contained in salt, but the same amount. If sprayed, the effect is less. In addition, calcium ions are effective in increasing drainage and air permeability by making fine clay particles aggregate and form a lump, thereby generating micropores.

According to another aspect of the present invention, the present invention provides a dust suppression method comprising the following steps: (a) 0.5- per 1 m ² of the dust suppressing composition of the present invention described above on the ground capable of generating dust. Evenly spraying in an amount of 5 L.

According to another aspect of the present invention, the present invention provides a dust suppression method comprising the following steps: (a) 0.5 per 1 m ² of the dust suppressing composition of the present invention described above on the ground capable of generating dust. Applying evenly in an amount of -5 L and then stabilizing the ground for 30-90 minutes so that the dust suppressant composition is absorbed into the ground; (b) stabilizing the stabilized ground in step (a) at a pressure of 50-150 kgf/m ² ; And (c) uniformly spraying the dust inhibitor composition of any one of claims 1 to 4 on the stabilized ground of step (b) in an amount of 0.3-1 L per 1 m ² .

The dust suppression method of the present invention uses the dust suppression composition of the present invention as described above, and descriptions in common between the two are omitted in order to avoid excessive complexity of the specification due to repeated description.

The method of the present invention for suppressing dust using the above-described dust suppression composition of the present invention will be described in detail step by step as follows:

(a) Spraying and stabilizing the ground with the above-described dust suppressant composition of the present invention on the ground capable of generating dust

First, in the method of the present invention, the dust suppressing composition of the present invention is uniformly sprayed in an amount of 0.5-5 L per 1 m ² on the ground capable of generating dust, and then the dust suppressing composition is absorbed into the ground. -Includes stabilizing the ground for 90 minutes.

According to a preferred embodiment of the present invention, the ground that can generate the dust is a playground, a tennis court, a construction site or a construction site passageway.

According to a more preferred embodiment of the present invention, the dust suppressant composition is sprayed in an amount of 1-2 L per 1 m ² on the ground capable of generating dust, and stabilizes the ground for 50-70 minutes.

The inclusion of the step of stabilizing the ground for 30-90 minutes in the method of the present invention is to give the dust suppressant composition of the present invention time to absorb moisture in the atmosphere and react with the soil to form an oxcycloid cement.

Spraying of the dust suppressant composition of the present invention may use various sprayers, sprayers or sprinkling vehicles known in the art, and preferably a sprinkling vehicle equipped with a spray nozzle is used.

(b) ground stabilization by physical pressure on the stabilized ground in step (a)

Then, the method of the present invention comprises the step of stabilizing the stabilized ground in step (a) with a pressure of 50-150 kgf/m ² .

Another feature of the present invention is that the ground is compacted and stabilized at a pressure of 50-150 kgf/m ² in order to improve the dust suppression effect of the dust suppressing composition of the present invention.

According to a preferred embodiment of the present invention, the pressure is 80-120 kgf/m ² .

As a device for applying physical pressure to the ground, various rollers or vibrating rollers known in the art may be used.

When the pressure applied physically is less than 50 kgf/m ^2, the effect of compacting the ground by applying the physical pressure is weak, and when the pressure exceeds 150 kgf/m ² , the ground becomes too firm.

(c) additional spraying of the dust inhibitor composition on the stabilized ground in step (b)

Finally, the method of the present invention includes the step of uniformly spraying the above-described dust suppressant composition of the present invention on the stabilized surface of step (b) in an amount of 0.3-1 L per 1 m2.

In the method of the present invention, the dust suppression effect is greatly increased through the first spraying step of the dust inhibitor composition of the present invention, the ground stabilization step by applying a constant physical pressure, and finally the second spraying step of the dust suppressant composition of the present invention. And another one of the features of the present invention is that there is a difference in the amount of the dust inhibitor composition sprayed during the first spray and the second spray of the dust inhibitor composition.

According to a preferred embodiment of the present invention, the dust suppressant composition is sprayed in an amount of 0.3-0.6 L per 1 m ² , more preferably in an amount of 0.45-0.55 L.

By stabilizing the ground that can generate dust through the method of the present invention described above, it is possible to achieve a dust suppression effect by preventing scattering of dust containing harmful substances such as yellow sand.

The features and advantages of the present invention are summarized as follows:

(I) The present invention relates to a dust suppressant composition comprising magnesium chloride 98 to 99.9% by weight and sodium hypochlorite 0.1 to 2% by weight as active ingredients, and an aqueous solution having a concentration of 20 to 40% by weight.

(Ii) The dust suppressant composition of the present invention has an excellent effect of strongly controlling dust generation by absorbing moisture in the atmosphere at the same time as spraying with a strong adsorption power when spraying on the ground of the playground that generates dust. have.

(Iii) In addition, the composition of the present invention has the property of not only absorbing moisture in the atmosphere of the composition, but also reacting with the soil to form an oxycycloid cement, which makes the ground hard and stabilizes the ground. Achieve an excellent effect on inhibition.

(Iv) On the other hand, the present invention provides a dust suppression method using the above-described dust suppression composition, the first spraying step of the dust suppressant composition of the present invention, the ground stabilization step by applying a constant physical pressure, and finally, the additional dust of the present invention. The dust suppression effect is greatly improved through the second spraying step of the inhibitor composition.

(V) The present invention has a characteristic that the effect lasts until about 6-8 months after construction, although there are slight differences depending on the weather conditions and other frequency of use.

Hereinafter, the present invention will be described in more detail through examples. These examples are only for describing the present invention in more detail, and that the scope of the present invention is not limited by these examples according to the gist of the present invention, for those of ordinary skill in the art to which the present invention belongs. It will be self-evident.

Example

Throughout the present specification, "%" used to indicate the concentration of a specific substance is (weight/weight)% for solids/solids, (weight/volume)% for solids/liquids, and Liquid/liquid is (vol/vol) %.

Preparation Example 1: Preparation of dust suppressant composition

The dust suppressant composition was mixed by weighing the contents of the components shown in Table 2 below with a scale, and then added to water in the composition of Table 3 and stirred until a uniform solution without residue was prepared to prepare a dust suppressant composition. : Sodium hypochlorite and magnesium chloride were purchased from TOKUYAMA (Japan) and used.

ingredient Example 1 (% by weight) Sodium hypochlorite One Magnesium chloride 99 Sum 100

ingredient Example 2 (% by weight) Example 3 (% by weight) Example 1 20 30 water 80 70 Sum 100 100

Experimental Example 1: Measurement of the freezing point of the dust suppressant composition

The freezing point of the dust inhibitor compositions of Examples 2 and 3 of Table 3 was measured according to ASTM D 1177 (Antifreeze freezing point test method). To summarize the measurement process, first, acetone or methanol was added to a cooling tank, and then dry ice was added to make a cooling solution, and then 75-100 ml of the compositions of Examples 2 and 3 were placed in a cooling tube, and a stirrer and thermometer were placed using a cork stopper. I did. The cooling tube was placed in the cooling liquid, and at the same time as starting cooling, the stirrer was stirred up and down at a rate of 60-80 times per minute until the measurement was completed. The freezing point measurement results are summarized in Table 4 below:

- Example 2 Example 3 Freezing point -22℃ -47℃

As can be seen in Table 4, it was confirmed that the freezing points of Examples 2 and 3 according to the present invention were very low.

Experimental Example 2: Measurement of the deliquescent property of Example 1

2 g of Example 1 was put on the bottom of a 30 ml transparent plastic container with an open top and left for 7 days in a space with a relative humidity of 82%. Then, the water absorbed in the container was poured into a measuring container marked in ml, and the amount of absorbed water was measured. As a result of measuring the amount of water absorbed in the air through a measuring container marked in ml, about 2 ml was measured.

Experimental Example 3: Moisture retention test

The dust suppressant composition of Example 3 and the dust suppressant of other companies listed in Table 5 below were sprayed with a sprayer in a space of about 5 m ² of the pavement where the vehicle was controlled, and it was observed whether moisture was maintained. The results are shown in Table 6.

DUS-CON Comparative Example 1
(MgCl ₂ % by weight) Comparative Example 2
(MgCl ₂ % by weight) Aqueous solution A 29-33 - Aqueous solution B - 20-28.99

division Example 3 Comparative Example 1 Comparative Example 2 Moisture on the pavement
Retention period 13th 9th 3 days

As can be seen in Table 6, it was confirmed that the dust suppressing composition of Example 3 according to the present invention had a better effect of maintaining moisture compared to Comparative Examples 1 and 2.

Experimental Example 4: Dust suppression experiment

2 days after spraying about 60 L of the dust suppressant composition of Examples 2 and 5 in Comparative Examples 1 and 2 on a school playground where a lot of dust blows using a spraying vehicle equipped with a spray nozzle Afterwards, in order to check the suppression effect of dust before and after spraying, moisture was measured according to the manufacturer's protocol using a soil moisture meter (GMK-770S, vendor: shipbuilding instrument), and the results are summarized in Table 7 below: Moisture measurement Was conducted by injecting a sensor into a soil depth of 20 mm, and the dry soil moisture exceeded 25%: moist, dry soil moisture 20-25%: slightly dry, dry soil moisture 12-20%: dry, dry soil moisture less than 12%: very dry Classified.

division Before spraying Example 2 Example 3 Comparative Example 1 Comparative Example 2 Dry soil moisture (%) 11 27 28 21 18 Dry or not Very dry Wet Wet Slightly dry dry

As can be seen in Table 7 above, it can be seen that the dust suppression composition of Examples 2 and 3 according to the present invention has superior moisture retention compared to Comparative Examples 1 and 2, thereby suppressing dust compared to Comparative Examples 1 and 2. We believe the effect is excellent.

Experimental Example 5: Difference in dust suppression effect according to construction method

(1) Construction method 1

A soil moisture meter after 2 hours after spraying the dust suppressant composition of Example 3 on the ground in an amount of 2 L per 1 m ² using a spraying vehicle equipped with a spray nozzle on a school playground where a lot of dust is blown ( GMK-770S, vendor: shipbuilding instrument) was used to measure moisture before and after spraying, and the results are summarized in Table 8 below: Moisture measurement was carried out by injecting a sensor into a soil depth of 20 mm, and the dry soil moisture exceeded 25%. : Moisture, dry soil moisture 20-25%: Slightly dry, dry soil moisture 12-20%: Dry, dry soil moisture less than 12%: Classified as very dry.

(2) Construction method 2

Example of the present invention for 1 hour by spraying the dust suppressant composition of Example 3 on the playground ground in an amount of 1 L per 1 m ² using a spraying vehicle equipped with a spray nozzle in the same school playground as in Construction Method 1 By using the property of forming an oxycycloid cement by the dust inhibitor composition of 3, the ground was hardened and made strong, and the ground was stabilized. Subsequently, in order to apply a physical force to the ground of the playground where the ground is hardened, the ground is physically stabilized at a pressure of 100 kgf/m ² using a roller, and additionally, the dust suppressant composition of Example 3 is applied to a spraying vehicle equipped with a spray nozzle. By spraying on the ground of the playground in an amount of 500 ml per 1 m ^{2, the} formation of oxycycloid cement was additionally performed on the stable ground. And after 2 hours, the moisture was measured in the same way as the method of measuring moisture in Construction Method 1, and the results are summarized in Table 8 below.

division Before spraying Construction method 1 Construction method 2 Dry soil moisture (%) 11 27 28 Dry or not Very dry Wet Wet

As can be seen from Table 8, when the dust suppressing composition of Example 3 of the present invention was applied by the construction method 2, it was found that the moisture retention was excellent and the dust suppressing effect was more excellent.

Experimental Example 6: Test results of soil sprayed with a dust inhibitor composition

The soil in which the dust suppressant composition of Example 3 was sprayed on the school playground was used as a sample, and the test was requested to the Korea Testing and Research Institute. The results are summarized in Table 9 below:

Test Items unit Result Test Methods CD mg/kg 0.039 Soil pollution process test group: 2008 Cu mg/kg 1.972 Soil pollution process test group: 2008 Pb mg/kg 1.68 Soil pollution process test group: 2008 Zn mg/kg 31.8 Soil pollution process test group: 2008 Ni mg/kg 6.58 Soil pollution process test group: 2008 Cr(VI) mg/kg Not detected Soil pollution process test group: 2008 CN ^- mg/kg Not detected Soil pollution process test group: 2008 Hg mg/kg 0.0061 Soil pollution process test group: 2008 As mg/kg 0.280 Soil pollution process test group: 2008 moisture weight% 13.4 Soil pollution process test group: 2008 pH (20℃) - 6.6 Soil pollution process test group: 2008

As can be seen in Table 9, the test results were confirmed to satisfy the standards for concerns about soil contamination and countermeasures based on the Soil Environment Conservation Act.

As described above, specific parts of the present invention have been described in detail, and it is obvious that these specific techniques are only preferred embodiments, and the scope of the present invention is not limited thereto for those of ordinary skill in the art. Therefore, it will be said that the substantial scope of the present invention is defined by the appended claims and their equivalents.

Claims (4)

A dust inhibitor composition comprising 99.0% by weight of magnesium chloride and 1.0% by weight of sodium hypochlorite as active ingredients, and an aqueous solution having a concentration of 20-40% by weight. delete delete Dust containment method comprising the following steps:
(a) Evenly spraying the dust suppressant composition of claim 1 in an amount of 0.5-5 L per 1 m ² on the ground that can generate dust, and then apply the dust suppression composition to the ground for 30 to 90 minutes. Stabilizing;
(b) stabilizing the stabilized ground in step (a) at a pressure of 50-150 kgf/m ² ; And
(c) uniformly spraying the dust inhibitor composition of claim 1 on the stabilized ground of step (b) in an amount of 0.3-1 L per 1 m ² .