KR20200079955A - Neutralizing Treatment and vegetation method of Acid Drainage Slope - Google Patents

Abstract

The present invention relates to an acid drainage slope greening method capable of ensuring economic efficiency, and more particularly, to a neutralizing treatment and greening method for an acid drainage slope, including: mixing a predetermined amount of a sulfurized material coating agent with a predetermined amount a neutralizing agent and thus performing spray coating and neutralizing treatment on an acid drainage slope, in order to reduce generation of acid drainage and neutralize acidity by coating a sulfurized material included in the acid drainage slope; forming a neutralization layer with a predetermined thickness on a top surface of the acid drainage slope which is coated and neutralized to prevent the acid drainage from ascending to a surface by a capillary phenomenon; and covering a cotton net on a top surface of the neutralization layer and then forming a vegetation layer with a predetermined thickness, wherein dipotassium hydrogen phosphate (K_2HPO_4) is used as the coating agent, sodium hydrogen carbonate (NaHCO_3) is used as the neutralizing agent, and the neutralization layer is formed by mixing cement or dolomitic limestone [(Ca·Mg)CO_3] with a vegetation base material.

Description

Neutralizing Treatment and vegetation method of Acid Drainage Slope}

The technical field of the present invention relates to acid drainage slope recording, which inhibits and neutralizes the acid drainage generated on the slope when recording the slope containing sulfide material to prevent the growth and sluggishness of greening plants due to the acid drainage. It relates to the neutralization treatment method and the greening method of the acid drainage slope.

In general, specific acid soils containing pyrite are subject to acid drainage containing high concentrations of various ions such as Fe, As, heavy metal, SO4, Al, and Mn, depending on the oxidation of pyrite, and acid drainage causes soil, surface water, and groundwater. There are various problems such as acidification and heavy metal pollution, structure corrosion, plant death, and landscape damage caused by sediment.

Particularly, acid drainage inhibits nutrients and kidney growth of plants due to Al, Mn, etc., which are harmful to plants, thereby inhibiting nutrient absorption of plants, and acid drainage is discharged into water systems or soils, resulting in high concentrations of heavy metals (Fe, Cd, Cr, As, Pb, etc.) and SO4 ^2- and have a low pH, which hinders plant growth.

In addition, the high concentration of iron contained in acid drainage generated by oxidation of pyrite is precipitated as iron oxide minerals on the plant roots or the soil surface as the acid drainage neutralizes by reacting with the surrounding substances, and the precipitated iron oxide is the permeability of soil and plant roots. It inhibits growth, and heavy metals and aluminum contained in acid drainage are toxic to plants, causing serious damage to plant rooting and growth.

And even in the slope slopes consisting of rocks containing peculiar acid soil or pyrite, where acid drainage occurs, the soil is acidified as the acid drainage flows along the slope, causing obstacles to germination and growth of plants, including road construction. In the vegetation greening of slopes, which are normally performed in construction projects, measures to treat acid drainage are emerging as an important social issue.

As a conventional technique for solving this problem, a method of preventing oxidation of pyrite and suppressing the generation of acidic drainage has been generally performed, which is a technique of coating the surface of pyrite.

The pyrite surface coating method chemically coats the surface of pyrite and blocks contact with oxygen, thereby preventing the generation of acidic drainage and smoothing the vegetation, so that the concentration of 0.01 mol of potassium phosphate monobasic on the surface of pyrite (KH ₂ A solution of PO ₄ ) and a concentration of 0.02 mol hydrogen peroxide (H ₂ O ₂ ) was sprayed to block the reaction of oxidizing agents O ₂ and Fe ^{3 +} with pyrite to suppress the occurrence of acidic drainage.

As for the surface coating method, a conventional patent technology is known, which is a coating technology for inhibiting the generation of acid drainage and promoting vegetation coating, as disclosed in Korean Patent Publication No. 10-0868776, with a concentration of 0.01 mol in special acid soil containing pyrite By coating with a coating agent of a mixture of potassium phosphate (KH ₂ PO ₄ ) and a concentration of 0.02 mol of hydrogen peroxide (H ₂ O ₂ ) and a concentration of 0.01 mol of sodium carbonate (Na ₂ CO ₃ ), the specific acid contained in the soil It oxidizes the surface of pyrite and precipitates and coats iron ions eluted during the oxidation process with iron phosphate, iron hydroxide or iron oxide minerals on the surface of pyrite, blocking the contact between oxidizing material and pyrite in the medium to suppress acid drainage and inhibit vegetation coating. It is a facilitating technique.

However, in the surface coating technique of the above-mentioned prior arts, it is common that there are many gaps (notches) on the slopes of the rock, and in general, rainwater, condensation, etc. are impregnated with moisture. It is difficult to remove, and the dissolved oxygen contained in rainwater on the slope side remains, so it is impossible to completely block the contact between pyrite and oxygen, and it is also difficult to neutralize the acid drainage to prevent the occurrence of acid drainage completely. have.

In addition, it is important to create a vegetation base for vegetation to grow on the slope of the acid drainage slope, but in the case of the acid drainage slope, there is a case in which plant growth is not smooth and death occurs even when the soil over 1 m is generally covered.

Therefore, for the greening of the slope of acid drainage, the coating layer of acid drainage-generating cancer, neutralizing agent treatment, and the neutralization layer composition for blocking the capillary phenomenon of acid drainage and the vegetation layer for plant growth are important. If excessively formed, there is a problem that the construction cost rises, and an appropriate thickness of the neutralized layer is required. In addition, a neutralized layer in a range that does not impede the greening of the acid drainage slope must be created. There is a need for a method of forming the type and thickness of the material.

The present invention is to solve the above-mentioned problems, while reducing the occurrence of acid drainage on the slope of a specific acid soil containing a sulfide material, the acid drainage rises to vegetation soil by capillary action to prevent the phenomenon of plant death, acid It is an object of the present invention to provide a neutralization treatment and a greening method of an acid drainage slope that forms a neutralization layer of an appropriate type and thickness on a drainage slope.

In order to solve the above-mentioned problems, the present invention is a method for neutralization treatment and greening of acid drainage slope surface, coating the sulfide material contained in acid drainage slope 1 to reduce the occurrence of acid drainage and neutralize acidity. Each of the coating agent (2) and the neutralizing agent (3) is mixed in a certain amount to spray coating and neutralize the acid drainage slope, and the acid drainage on the top surface of the coated and neutralized acid drainage slope is raised to the surface by capillary action. The neutralization layer 4 is formed to have a certain thickness to prevent it, and the top surface of the neutralization layer is covered with a cotton net 5, and then the vegetation layer 9 is formed to a certain thickness, wherein the coating agent is potassium dihydrogen phosphate ( K ₂ HPO ₄ ) is used, and neutralizing agent is sodium hydrogen carbonate (NaHCO ₃ ), and the neutralization layer is cement or lime clay [(Ca·Mg)CO ₃ ](10) and vegetation base material (7). It is to provide a neutralization treatment and greening method of the acid drainage slope to be mixed and composed.

The acidic drainage slope (1) is coated and neutralized by diluting 1 g of dipotassium phosphate (K ₂ HPO ₄ ) coating agent (2) and 1 g of sodium hydrogen carbonate (NaHCO ₃ ) neutralizing agent (3) based on 1 l of water. 30 liters (30ℓ/㎡) per area of the drain slope surface is sprayed evenly on the slope surface to penetrate into the slope surface.

The neutralization layer 4 is composed of 3% cement (8) or 10% lime lime [(Ca·Mg)CO ₃ ](10) mixed with a vegetation base material (7), but the vegetation base material (7) The composition is composed by mixing 15,000g/m2 of growth aid (11), 150g/m2 of greening adhesive (12), and 24l/m2 of water (13), which is a mixture of beet soil, loess, wood chip, chip, and sludge. And a thickness of 1-2 cm on the neutralized slope.

The vegetation layer (9) is mixed with plant seeds (6) and vegetation base material (7) so that the composition is provided with a thickness of 2-3 cm on the upper surface of the neutralization layer (4) on which the cotton net (5) is installed.

In the test section of the neutralization treatment and greening method of the acid drainage slope, the test zone is a slope 1 containing a large amount of pyrite 1: 1 to 1.2 slope 3 test 1 (100), 3 test 2 (200) 3 and Each of the three test spheres 300 is composed of an area of 1 m 2 (1 m wide x 1 m long), but the test 1 sphere 100 is divided into three test spheres consisting of a control, treatment 1 and treatment 2 spheres. The control is composed of 1 cm thick vegetation-based material (7) and 2 cm thick vegetation layer (9), and the treatment section 1 consists of 2 cm thick vegetation-based material (7) and 3 cm thick vegetation-based material (9), and the treatment section 2 is vegetation-based. Ash (7) 3cm thick, vegetation layer (9) is composed of 4cm thick, the test section 2 (200) is divided into 3 sections, 4 sections, and 5 sections, and the coating agent (2) phosphoric acid based on 1 liter of water Mixing and dilution of 1 g of dipotassium hydrogen (K ₂ HPO ₄ ) and 10 g of neutralizing agent (3) sodium hydrogen carbonate (NaHCO ₃ ) to form a mixed aqueous solution of 30 l/㎡, and uniformly spraying it on the acid drain slope (1) The sulfiding material is coated and neutralized, and the vegetation base material 7 with 3% cement (8) mixed on the upper surface of the acid drainage slope (1) coated and neutralized is attached to a certain thickness to neutralize the layer (4). To create, and then install a cotton net (5) on top of the neutralization layer, plant seeds (6) on the top of the vegetation base material (7) to each of a certain thickness to form a vegetation layer (9), , The thickness of the neutralizing layer (4) and vegetation layer (9) is composed of 3 treatment layers with a neutralization layer (4) thickness of 1 cm, a vegetation layer thickness of 2 cm, and treatment 4 spheres with a neutralization layer thickness of 2 cm and a vegetation layer thickness of 3 m. The treatment 5 spheres are composed of a neutralization layer (4) 3 cm thick and a vegetation layer thickness 4 cm, and the test 3 spheres (300) are divided into 3 test spheres consisting of 6 treatment zones, 7 treatment zones, and 8 treatment zones. Based on 1ℓ, the coating agent (2) dipotassium hydrogen phosphate (K ₂ HPO ₄ ) 1g and neutralizing agent (3) sodium hydrogen carbonate (NaHCO ₃ ) 10g are mixed and diluted to form a 30ℓ/㎡ mixed aqueous solution, and the acid drainage Evenly on the slope (1) A vegetation base material (10) mixed with 10% lime lime [(Ca·Mg)CO ₃ ](10) on the upper surface of the acid drainage slope (1) by spraying and neutralizing the sulfide material by spraying. ) To form a neutralized layer (4) by laying each to a certain thickness, and after installing a cotton net (5) on the upper portion of the neutralized layer, vegetation base material (7) in which plant seeds (6) are mixed thereon Each to a certain thickness to form a vegetation layer 9, wherein the treatment 6 spheres are composed of a neutralizing layer 4 thickness of 1 cm and a vegetation layer thickness of 2 cm, and the treatment 7 spheres are composed of a neutralization layer thickness of 2 cm and a vegetation layer thickness of 3 m. In order to provide a method for the neutralization treatment and greening test method composition of acid drainage slope, characterized in that the treatment section 8 has a neutralization layer (4) thickness of 3 cm and a vegetation layer thickness of 4 cm.

The plant seeds (6) mixed in the vegetation layer (9) are mixed with the seeds of wood (Natura, cypress), herbaceous (bee yellow, dianthus, Daegeumgye), Korean paper grass (Tolfescu) seeds, and the amount of plant seeds mixed A total of 25 g/m2 of each 2.5 to 5.0 g per plant is mixed with around 30% of silver wood, 60% of herbaceous plants, and 10% of Korean paper grass.

In accordance with the present invention, the sulfidation material of the specific acid soil is coated with a coating agent containing a neutralizing agent, and by forming a neutralizing layer and vegetation layer having an optimum thickness on the coated upper side, the generation and suppression of acid drainage is suppressed and the capillary phenomenon is lowered at the same time. By neutralizing the acid drainage that rises to the vegetation base material, greening of the acid drainage slope is smoothly performed, and the effect of securing economic efficiency is generated.

In addition, by suppressing and neutralizing the generation of acidic drainage generated on the slope of the specific acid soil, when the acidic drainage is discharged to the water system or soil, it contains high concentrations of heavy metals (Fe, Cd, Cr, As, Pb, etc.) and SO4 ^2- It has a low pH, pollutes the soil with heavy metals, and prevents ecological adverse effects that interfere with plant growth.

In addition, acid drainage generated on the slope of the specific acid soil flows along the slope and reacts with the surrounding rocks or soil to neutralize part and precipitate iron oxide minerals during the neutralization process, and the precipitated iron oxide minerals precipitate on the surrounding plant roots and surfaces. The effect of preventing the adverse effects that interfere with the growth of various plants by interfering with the breathing of roots and absorption of nutrients and water penetration.

1(a) to 1(e) are photographs of the acid drainage slope subjected to coating and neutralization according to the present invention.
2 is a view showing the composition of the test sphere 1 according to the present invention.
3 is a view showing the composition of the test 2 sphere according to the present invention.
4 is a view showing the composition of the three test spheres according to the present invention.
FIG. 5 is a photograph of a state of recording cloth after 6 months of each test section according to the present invention.

A preferred embodiment of the present invention will be described. The above embodiments are described as one of the preferred embodiments of the present invention, and do not represent all of the technical spirit of the present invention, and are not limited thereto, and it should be understood that various equivalents that can replace them are included. do.

An embodiment of the neutralization treatment and greening method of the acid drainage slope of the present invention, as shown in FIG. 1(a), contains a sulfide material and coats the sulfide material on the acid drainage slope 1 where acid drainage occurs. As shown in Fig. 1(b) so that the generation of acid drainage is reduced and the acidity is neutralized, the coating agent (2) and the neutralizing agent (3) are mixed for spray coating and neutralization treatment, and the coated and neutralized acid drainage slope is treated. As shown in Fig. 1(c) on the upper surface of (1), a neutralizing layer 4 is formed to a certain thickness to prevent acid drainage from rising to the surface by capillary action, and in Fig. 1(d) As shown in the figure, the cotton net 5 is covered on the upper surface of the neutralization layer 4, and then, as shown in FIG. 1(e), the plant seeds 6 and the vegetation base material 7 are mixed. The vegetation layer 9 is formed to a certain thickness.

The coating agent (2) uses dipotassium hydrogen phosphate (K ₂ HPO ₄ ), the neutralizing agent (3) uses sodium hydrogen carbonate (NaHCO ₃ ), and the neutralizing layer (4) is lime gourmet [(Ca·Mg) CO ₃ ](10) and vegetation-based material (7) are used in combination, and vegetation-based material (7) included in the vegetation layer (9) is grown by combining side soil, loess, wood chipping chip, masato, and sludge. The auxiliary material 11 is blended to form the composition.

The coating and neutralization treatment method is a mixture of dilution of 1 g of dipotassium hydrogen phosphate (K ₂ HPO ₄ ) coating agent (2) and 1 g of sodium hydrogen carbonate (NaHCO ₃ ) neutralizing agent (3) based on 1 liter of water. 30 liters per area (30ℓ/㎡) is sprayed evenly on the acid drainage slope (1) to penetrate into the slope.

The neutralization layer 4 is composed by mixing 10% of lime clay [(Ca·Mg)CO ₃ ](10) with a vegetation-based material (7), but the vegetation-based material (7) is decayed soil, loess, and woody crushing Chip, masato, sludge, growth aid (11) 15,000g/m2, greening adhesive (12) 150g/m2, water (13) 24ℓ/m2 are mixed and composed, and the coated and neutralized upper surface 1~2cm thick.

The vegetation layer 9 is a cotton net by mixing the plant seeds 6 with the vegetation base material 7 containing the growth auxiliary material 11 blended with beetroot soil, ocher, wood shredding chips, masato, and sludge as described above. (5) It is laid on the upper part with a thickness of 2-3 cm.

In order to confirm the greening effect according to the thickness of the neutralizing layer of the acid drainage slope of the present invention, a test zone was formed and the greening state was performed in the following manner.

1. Test area composition and management

First, the test area is arranged in the south-facing slopes of 1:1 to 1.2, which contain a large amount of pyrite, and then the area is divided into 3 test areas (100), 3 test areas (200), and 3 test areas (300). Were each composed of an area of 1 m 2 (1 m horizontal × 1 m vertical). Hereinafter, the composition of the test sphere will be described in detail.

<Test 1 ball>

The test sphere 1 100, as shown in Figure 2, by attaching a vegetation base material to the acid drainage slope 1, divided into three test spheres consisting of control, treatment 1, treatment 2, A vegetation layer (9) is installed on the slope of the acid drainage, and a vegetation layer (9) is mixed with plant seeds (6) and vegetation base (7) on the top of the cotton net. ) To a certain thickness.

The thickness of the vegetation base material and the vegetation layer is composed of a control with a vegetation base material (7) thickness of 1 cm, a vegetation layer (9) thickness of 2 cm, and the treatment zone 1 vegetation base material (7) thickness of 2 cm, vegetation layer (9) thickness It was composed of 3 cm, and the treatment 2 spheres were composed of vegetation base material (7) 3 cm thick and vegetation layer (9) 4 cm thick.

<Test 2 ball>

The test 2 zone 200 is composed of three test zones consisting of three treatment zones, four treatment zones, and five treatment zones, and as shown in FIG. 3, the coating agent (2) potassium dihydrogen phosphate (1) based on 1 liter of water ( K ₂ HPO ₄ ) 1g and neutralizing agent (3) sodium hydrogen carbonate (NaHCO ₃ ) 10g were mixed and diluted to form a mixed aqueous solution of 30ℓ/㎡, and sprayed uniformly on the acid drainage slope (1) to disperse the sulfide material. It was coated and neutralized.

Then, the vegetation base material 7 with 3% cement (8) mixed on the upper surface of the acid drainage slope (1) coated with the treatment 3, treatment 4, treatment 5, and neutralized is neutralized. (4) After the composition, the cotton net (5) is installed on the upper portion of the neutralization layer, plant seeds (6) on the upper portion of the vegetation base material (7), each of a certain thickness is laid vegetation layer (9) Was created.

The thickness of the neutralization layer 4 and the vegetation layer 9 is composed of 3 treatment layers with a neutralization layer 4 thickness of 1 cm and a vegetation layer thickness of 2 cm, and the treatment 4 spheres have a neutralization layer thickness of 2 cm and a vegetation layer thickness of 3 m. , Treatment 5 spheres were composed of a neutralizing layer (4) thickness 3cm, vegetation layer thickness 4cm.

<Test 3 ball>

The test 3 zone 300 is composed of three test zones consisting of six treatment zones, seven treatment zones, and eight treatment zones. As shown in FIG. 4, the coating agent (2) potassium dihydrogen phosphate (1) based on 1 liter of water ( K ₂ HPO ₄ ) 1g and neutralizing agent (3) sodium hydrogen carbonate (NaHCO ₃ ) 10g were mixed and diluted to form a mixed aqueous solution of 30ℓ/㎡, and sprayed uniformly on the acid drainage slope (1) to disperse the sulfide material. It was coated and neutralized.

And the vegetation base material with 10% mixed lime lime [(Ca·Mg)CO ₃ ](10) on the upper surface of the acidic drainage slope (1) coated with the treatment 6, treatment 7, treatment 8, and neutralized ( 7) each to a certain thickness to form a neutralization layer (4), and after installing a cotton net (5) on the upper portion of the neutralization layer, vegetation base material (7) is mixed with plant seeds (6) on the top (7 ) To a vegetation layer (9) by laying each with a certain thickness.

The treatment 6 spheres are composed of a neutralizing layer (4) thickness of 1 cm, a vegetation layer thickness of 2 cm, the treatment 7 spheres are neutralizing layer thickness of 2 cm, a vegetation layer thickness of 3 m, the treatment 8 spheres of neutralization layer (4) thickness of 3 cm, vegetation layer thickness Composition was 4 cm.

<Public plants>

Disclosed plants mixed in the vegetation layer (9) of Test 1, Test 2 and Test 3 are fast growing and resistant to drying and are widely used for greening slopes (legumes, cypresses), native plants. Plant seeds (6), such as herbaceous species (bee yellow, dianthus, Daegeumgye), and Hanji-type grass (Tol Fesque), were selected and mixed.

The mixed amount of plant seeds (6) is 7.5 g/m2 (30%) of woody roots, 15.0 g/m2 (60%) of herbaceous plants, Korean paper type grass 2.5 in accordance with the Ministry of Land, Transport and Maritime Affairs (2009)'Design and Construction Guidelines for Road Slope Greening' A total of 25 g/m 2 (100%) was planted for each plant with g/m 2 (10%) inside and outside, and the germination rate for each plant seed was a growth phase capable of controlling the growth environment such as light, temperature, and humidity for one month in spring ( Growth Chamber: DS-54GLP) maintains a temperature of 70% humidity, 25℃ for 8 hours in light condition, and 15℃ for 16 hours in dark condition. As a result, it was confirmed that 53.4% ~ 88.9% germination as shown in the table below.

<Vegetation base material>

The vegetation-based material (7) included in the test sphere is composed of growth auxiliary material (15,000 g/m2), water (24 l/m2), greening adhesive (150 g/m2), and the growth auxiliary material (11) is by-product soil, Ocher, wood chips, masato, sludge, etc. were mixed.

<Test Area Management>

In order to increase the initial germination rate, the test sphere was subjected to irrigation twice (20 mm/1 level) depending on the surface dry state for a month, and then maintained a natural state without artificial irrigation and fertilization.

2. Test subject and analysis

For each test zone, the analysis was conducted once a month for 6 months, and the soil acidity (pH), surface hardness, acidity (pH), and plant growth characteristics were investigated and analyzed, but the physical and chemical properties and plant growth characteristics measurement results of the test system were SAS systems. For window V9.1 (SAS instiute Inc, 2013) was used for statistical processing, and the difference in evaluation for each measurement was analyzed by least significant difference (LSD).

3. Test results

<Public Soil Acidity (pH)>

Soil acidity of the disclosed soil was very high (pH 3.2), which was not suitable for plant growth, and the growth aid showed a water content of about 45.93%, an acidity (pH) of 7.2, and an organic content of about 27%. Therefore, the growth supplement meets all evaluation criteria of the Ministry of Land, Transport and Maritime Affairs, and is good for plant germination and growth.

<Surface hardness>

Plant growth according to slope surface hardness is suitable for root growth of plants when it is 23 mm or less. As shown in the table below, the treatment surface of the 3 treatment groups, 4 treatment groups, and 5 treatment groups of cement are high in initial surface hardness. There was a negative effect on the test results, and the control 6, treatment 7, and treatment 8 of test 3, which is a mixture of control and treatment 1, treatment 2, and lime gourmet of test 1, all have an appropriate surface hardness value of 23 mm or less. appear.

<Experimental acidity (pH)>

As a result of measuring the soil acidity (pH) according to the neutralization layer type and thickness of the acid drainage slope of each test zone over six times, the soil acidity in the control, treatment, and treatment groups of Test 1 was higher than pH 5.0. PH 3 to treatment 4, treatment 5, minimum pH 7.6 to maximum pH 7.9, test 3 treatment 6, treatment 7, treatment 8, minimum pH 7.4 to maximum pH 7.5 The soil neutralization effect was found to be great. The detailed measurement results are shown in the table below.

As a result of the test, the treatment of 6, 7, and 8 treatments in Test 3 showed excellent acid neutralization effect during the experiment period. When lime lime [(Ca, Mg)CO3] mixed in the neutralization layer was added to acid, soil Since the effect of reducing the phytotoxicity from Al and Mn is caused by Ca and Mg that is neutralized and leached from limestone, the pH of the acidified acid rises, and all of them appear to be a range of soil acidity suitable for plant growth.

In addition, the acid drainage slope is affected by rainwater containing dissolved oxygen in the rainy season, and the acid drainage generated therein is a passage that rises to the surface due to the capillary phenomenon in the dry season. In the case of sphere, treatment 4, treatment 5, treatment 6, treatment 7 and treatment 8, neutralization layers containing organic matter and neutralizing agents (lime clay and cement) are formed on the slopes to produce acidic drainage that is transferred by capillary action. As it was analyzed to be neutralized, it was investigated that the soil neutralizing effect on acid drainage was excellent, the persistence was large, and the difference according to the thickness was not great in the test group treated with cement and lime according to the type of neutralization layer.

In addition, the water content according to the type and thickness of the neutralized layer of the acid drainage slope is measured for 5 months, and as a result, the plant death rate is high when the water content is less than 2%, and plant death caused by moisture occurs when the water content is more than 3%. It is known that it does not, but detailed test results are omitted because there is a large difference in water content depending on the presence of rainfall.

<Plant Growth Characteristics>

Of the plant growth characteristics, the ground cover rate was the highest in the treatment group 8 measured 6 times and the lowest in the control group, treatment group 7, treatment group 6, treatment group 5, treatment group 4, treatment group 3 , Treatment 2, and treatment 1, respectively. The specific surface coverage (%) is shown in the table below.

As a result of measurement (6th measurement), especially when 6 months have elapsed from the above ground cover rate, the control group 15%, treatment group 1 16%, treatment group 2 35% showed lower grade, and treatment group 2 of test group 3 Intermediate level was 74%, treatment 4 ball 75%, treatment 5 ball 77%, and the treatment coverage of test section 3 was 6% 88%, treatment 7 ball 95%, treatment 8 ball 95%, etc. . In the evaluation of the greening method of the Ministry of Land, Transport and Maritime Affairs''Design and Construction Guidelines for Road Slopes', the criteria for vegetation cover rate in the case of herbal-type, herbal-tree mixed type are 3 grades (bottom: less than 60%, medium: 60-79%) , Phase: 80% or more), it is confirmed that the surface coverage in treatment 6, treatment 7, and treatment 8 was better than this.

In the sixth measurement, the ground covering state is the six processing zones of FIG. 5(g), the seven processing zones of FIG. 5(h) from the photographs of the ground covering states of FIGS. 5(a) to 5(i). It is confirmed that the ground cover rate of the treatment 8 balls of 5(i) is high.

Among the plant growth characteristics, the number of germinations of woody roots was measured six times, and both woody agaric and cypresses were the most common in treatment 8 and the lowest in control. More specifically, when 5 or 6 months passed, the lowest level was found in 0.3 cases of control, 0.7 of 1 treatment, and 0.7 of 2 treatments. , 3.6 treatments, 3.6 treatments, 4.3 treatments, 4.5 treatments, 4.5 treatments, and 4.7 treatment treatments, were high in the treatment group containing lime clay according to the type of neutralization layer. It was found to be the lowest in the test group that did not process the neutralization layer, with 0.6 and 0.7 treatments, and 3.0 treatments, 3.0 treatments, 3.1 treatments, 3.1 treatments, and 3.1 treatment treatments. It was the highest in the test group.

As a result of measuring six times among plant growth characteristics, both jaw and mulberry were the largest in the treatment and the smallest in the control. More specifically, when measured after 6 months, the control 2.7cm, treatment 1 ball 5.7cm, treatment 2 ball 8.7cm, treatment 3 ball 31.3cm, treatment 4 ball 33.0cm, treatment 5 ball 34.0cm, treatment 6 ball It was 36.7cm, 41.7cm in 7 treatments, and 45.3cm in 8 treatments. And in the case of cyst, control 5.3cm, treatment 1, 6.0cm, treatment 2, 11.3cm, treatment 3, 45.7cm, treatment 4, 45.7cm, treatment 5, 45.8cm, treatment 6, 75.0cm, treatment 7, 78.3cm, The result was 81.0cm in 8 treatments, and the same result as that of the peach tree was found, and it was confirmed that the mixing of lime and clay was superior to that of cement, and there was no difference in thickness.

Among the characteristics of plant growth, as a result of measuring the root condition of the plant 6 months after the composition of the test sphere, as shown in the table below, the root length (peripheral, entourage) of tree roots, cypresses and herbaceous bee yellow, dianthus, and geumgye The weight was the longest and the highest in the treatment group 8 of the test group 3, and the root length was the shortest and the weight was low in the control group of the test group 1 with high soil acidity (pH).

According to the type and thickness of the neutralization layer, the root length was long and the weight was high in the 3 sections (6 sections, 7 sections, 8 sections) treated with lime clay on the neutral layer, and then the cement was treated with the neutral layer. It is high in 2 groups (Treatment 3, Treatment 4, Treatment 5) and low in Test 1 (Treatment, Treatment 1, Treatment 2) without neutralization layer, thickness (neutralization layer thickness + vegetation layer thickness) The root condition according to) is 3 cm <5 cm <7 cm, the root length (periphery, lateral root) is long and the weight is high. Poorly, 7cm had the longest root length, but it was confirmed that the growth difference from 5cm thick was not large.

The physicochemical properties of the soils summarized from the above test results showed that there was no significant difference in the surface hardness according to the type and thickness of the neutralized layer for effective greening of acid drainage slopes. In the treatment 3, treatment 4, treatment 5, the results affecting the root system of plants initially, but over time, there was no difficulty in the root growth of vegetation.

The soil acidity was strongly acidic as the pH of the control group in the final test group 1, pH3.7 of the treatment group 1 and pH4.1 of the treatment group 2, and the pH of the thickening layer and vegetation layer decreased as the thickness increased. Treatment of 3 sections with cement, pH 3 of treatment 3, pH7.6 of treatment 4, pH7.6 of treatment 5, pH7.6, Treatment of test 3 with lime lime, pH 6 of treatment, pH7.4 of treatment, pH7.4 of treatment 7 It was found that the neutralization effect was excellent with a pH of 8, and there was no difference according to the thickness.

In plant growth characteristics, the vegetation ground cover rate was highest at 88-95% in the treatment 6, treatment 7, and treatment 8 groups of test 3 with lime lime, and treatment with 3 of treatment 2 with cement It showed 74-77% in the 4 and 5 treatment groups, and the lowest coverage was 15-35% in the 1 treatment group. According to the thickness of the neutralization layer and vegetation layer, 3cm <5cm <7cm in order, but the difference according to the thickness was not large. Therefore, it was confirmed that for the greening of the acid drainage slope, it is effective to mix cement and lime clay in the neutralized layer, and the thickness is appropriate when considering economic feasibility.

In addition, the number of germinated individuals in woody wood was the highest in treatment 6, treatment 7, and treatment 8 of test 3 in which both lime trees and cypresses were mixed with lime, and was the lowest in control, and the number of germination according to the thickness of neutralization layer and vegetation layer There was no difference.

The labor was higher in treatment group 6, treatment group 7, treatment group 8 in test group 3 with lime lime than treatment group 3, treatment group 4 and treatment group 5 in cement 2, both cement and cypress. , There was no difference in labor according to thickness.

Plant roots were found to have the lowest root lengths (peripheral and lateral roots) and weight of tree roots, cypresses and herbaceous bee yellows, dianthus, and geumgye-guk. It was found to be the most excellent in the sphere and the treatment 8 spheres, and it was higher in the order of 7 cm, 5 cm, and 3 cm depending on the thickness. Would be appropriate.

According to the above test results, for effective greening of the acid drainage slope, the acid drainage generated inside the slope must be neutralized to move to the surface due to the capillary phenomenon, and the thickness of the neutralization layer and vegetation layer is appropriately considered in consideration of the construction amount. In order to satisfy this, it is most appropriate to make the total thickness of 3~5cm with 1~2cm of neutralized layer and 2~3cm of vegetation layer mixed with lime clay in the state of coating and neutralization in the case of soil rock slope. something to do.

That is, the acid drainage slope is mixed with a certain amount of the coating agent (2) dipotassium hydrogen phosphate (K ₂ HPO ₄ ) and the neutralizing agent (3) sodium hydrogen carbonate (NaHCO ₃ ) according to the acid drainage slope recording method of the present invention. Is coated and neutralized, and on the upper surface, 1~2cm of the neutralization layer that mixes a certain amount of lime goth [(Ca·Mg)CO ₃ ] with vegetation base material, and 2~ the vegetation layer that mixes seed and vegetation base material. By making it 3 cm, the effect of maximizing the greening of the acid drainage slope is generated.

1: Acid drainage slope 2: Coating agent
3: neutralizing agent 4: neutralizing layer
5: cotton net 6: plant seeds
7: Vegetation base material 8: Cement
9 Vegetation 10: Lime Goto
11: Growth aid 12: Greening adhesive
13: water 100: test 1 ball
200: Test 2 ball 300: Test 3 ball

Claims (6)

In the neutralization treatment and greening method of the acid drainage slope,
Coating the sulfide contained in the acid drainage slope (1) to reduce the occurrence of acid drainage and neutralize the acid,
A certain amount of each of the sulfide coating agent (2) and the neutralizing agent (3) is mixed and spray-coated and neutralized on the acid drainage slope.
The neutralized layer 4 is formed to a certain thickness to prevent the acidic drainage from being raised to the surface by capillary action on the upper surface of the coated and neutralized acid drainage slope.
After covering the cotton net 5 on the upper surface of the neutralization layer, the vegetation layer 9 is formed to a certain thickness,
The coating agent uses dipotassium hydrogen phosphate (K ₂ HPO ₄ ), the neutralizing agent uses sodium hydrogen carbonate (NaHCO ₃ ), and the neutralization layer is cement or lime clay [(Ca·Mg)CO ₃ ](10). Neutralization treatment and greening method of acid drainage slope characterized by mixing vegetation base material (7). According to claim 1,
The acidic drainage slope (1) is coated and neutralized by diluting 1 g of dipotassium phosphate (K ₂ HPO ₄ ) coating agent (2) and 1 g of sodium hydrogen carbonate (NaHCO ₃ ) neutralizing agent (3) based on 1 l of water. Neutralization treatment and greening method of acid drainage slopes, characterized in that 30 liters (30ℓ/㎡) per area of drain slopes are uniformly sprayed on the slopes to penetrate into the slopes. According to claim 1,
The neutralization layer 4 is composed of 3% cement (8) or 10% lime lime [(Ca·Mg)CO ₃ ](10) mixed with a vegetation base material (7), but the vegetation base material (7) The composition is composed by mixing 15,000g/m2 of growth aid (11), 150g/m2 of greening adhesive (12), and 24l/m2 of water (13), which is a mixture of beet soil, loess, wood chip, chip, and sludge. And neutralization treatment and greening method of acid drainage slope characterized in that it is formed by laying it in a thickness of 1 to 2 cm on the upper side of the neutralized slope. According to claim 1,
The vegetation layer 9 is mixed with the plant seeds 6 and the vegetation base material 7 to form a composition by laying a thickness of 2-3 cm on the upper surface of the neutralization layer 4 on which the cotton net 5 is installed. Neutralization and greening method of acid drainage slope. In the test section of the neutralization treatment and greening method of the acid drainage slope,
The test sphere is a slope containing a lot of pyrite: 1: 1 to 1.2 on the slope of 1 test area (100), 3 test area 2 (200) and 3 test area (300) 3 each area 1㎡ (horizontal 1m × 1m)
The test sphere 1 is divided into three test spheres consisting of a control sphere, a treatment sphere, and a treatment sphere, and the control sphere is composed of a vegetation base material 7 having a thickness of 1 cm and a vegetation layer 9 having a thickness of 2 cm, and treatment 1 The sphere is composed of vegetation base material (7) 2 cm thick, vegetation layer (9) 3 cm thick, and treatment 2 sphere is composed of vegetation base material (7) 3 cm thick, vegetation layer (9) 4 cm thick,
The test 2 sphere 200 is divided into 3 treatment zones, 4 treatment zones, and 5 treatment zones, based on 1 liter of water, 1 g of coating agent (2) potassium dihydrogen phosphate (K ₂ HPO ₄ ) and neutralizing agent (3) sodium hydrogen carbonate ( NaHCO ₃ ) 10 g of mixed and diluted to form a mixed aqueous solution of 30ℓ/㎡, and uniformly sprayed on the acid drainage slope 1 to coat and neutralize the sulfide material,
The vegetation base material 7 with 3% cement (8) mixed on the top surface of the acid drainage slope (1) coated and neutralized is formed to a certain thickness to form a neutralization layer (4), and the upper part of the neutralization layer After installing the cotton net 5, plant seeds 6 are formed on top of each of the vegetation base materials 7 to a certain thickness to form a vegetation layer 9, the neutralization layer 4 and vegetation The thickness of the layer (9) is composed of 3 treatment layers with a neutralization layer (4) thickness of 1 cm, and a vegetation layer thickness of 2 cm, treatment 4 spheres have a neutralization layer thickness of 2 cm, and a vegetation layer thickness of 3 m, and treatment 5 spheres have a neutralization layer (4 ) 3cm thick, 4cm thick vegetation layer,
The three test spheres 300 are divided into three test spheres consisting of 6 treatment zones, 7 treatment zones, and 8 treatment zones. The coating agent (2) potassium dihydrogen phosphate (K ₂ HPO ₄ ) 1 g and neutralizing agent ( 3) Mixing and diluting 10 g of sodium hydrogen carbonate (NaHCO ₃ ) to form a mixed aqueous solution of 30 l/m 2, spraying it evenly on the acid drainage slope (1) to coat and neutralize the sulfide material,
The coated and neutralized acid drainage slope (1) was placed on a top surface of lime vegetation [(Ca·Mg)CO ₃ ](10) mixed with 10% of vegetation base material (7) to a certain thickness, and neutralized layer ( 4) After the composition, the cotton net 5 is installed on the upper portion of the neutralization layer, and the vegetation base material 7, in which the plant seeds 6 are mixed, is installed at a certain thickness, and the vegetation layer 9 ),
The six treatment zones are composed of a neutralizing layer (4) thickness of 1 cm, a vegetation layer thickness of 2 cm, a treatment seven spheres of neutralization layer thickness of 2 cm, a vegetation layer thickness of 3 m, and a treatment eight sphere of neutralization layer (4) thickness of 3 cm, vegetation layer thickness. Neutralization treatment of the acid drainage slope characterized in that it is composed of 4cm and greening method test composition method. The method of claim 5
The plant seeds (6) mixed in the vegetation layer (9) are mixed with the seeds of wood (Natura, cypress), herbaceous (bee yellow, dianthus, Daegeumgye), Korean paper grass (Tolfescu) seeds, and the amount of plant seeds mixed A method for neutralizing and draining acidic drainage slopes, characterized by mixing 25 g/m2 of each 2.5 to 5.0 g for each plant, with about 30% of silver wood, 60% of herbaceous plants, and 10% of Korean paper grass.

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