CN113647222A - Method for restoring red mud yard in-situ greening - Google Patents
Method for restoring red mud yard in-situ greening Download PDFInfo
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
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- A01B79/00—Methods for working soil
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- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
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Abstract
The invention discloses a red mud yard in-situ greening restoration method, which comprises the following steps of preparing an auxiliary modifier; adding materials and mixing; standing, maintaining and repairing; modifying, repairing and inspecting; the invention relates to a plant test planting method, which is characterized in that on the basis of measuring the pH value, alkali concentration restoration rate, and the amount of microorganisms and organic matters of a red mud soil mixture, the restored red mud soil mixture can be put into the test planting for use by a test planting method before the red mud soil mixture is actually put into the planting, on the basis of measuring modified restoration parameters, the planting effect of the restored red mud soil mixture on plants is further accurately judged by the actual test planting method, and the germination rate of the plants planted in the test is calculated, so that whether the restored red mud soil mixture can be formally put into the planting use of the plants or not is conveniently judged by the germination rate, and the actual planting effect of the red mud soil mixture on the plants is further conveniently determined in a small-view manner.
Description
Technical Field
The invention relates to the technical field of red mud restoration treatment, in particular to a method for restoring in-situ greening of a red mud disposal site.
Background
Red mud is waste generated in the alumina industry, 1-2 tons of red mud waste residues are generated when 1 ton of alumina is produced, the main treatment mode is landfill and stacking, along with the continuous development of the alumina industry, the generated red mud occupies a large amount of land resources and brings great harm to the ecological environment, the soil of the red mud yard is high-salt and high-alkalinity, the nutrients are poor, the structural property of the soil is poor, the normal growth of plants is seriously inhibited, and the ecological restoration of the red mud yard is difficult to realize autonomously, so that the red mud is subjected to alkali reduction and modification to become the soil capable of planting the plants, and the method is the most effective method for large-scale red mud treatment;
however, in the existing method for repairing the red mud yard, because a means for modifying, repairing and inspecting the repaired red mud-soil mixture is lacked in the repairing process, the actual repairing effect of the red mud yard cannot be accurately known by the existing repairing technology after the red mud yard is repaired, the repaired red mud yard is put into planting and used, the environment is easily affected, and the difficulty of subsequent repairing and maintenance is further increased.
Disclosure of Invention
The invention provides a red mud yard in-situ greening restoration method, which can effectively solve the problems that in the existing red mud yard restoration method provided by the background technology, the actual restoration effect cannot be accurately known after the red mud yard is restored by the existing restoration technology due to the lack of a means for modifying, restoring and inspecting the restored red mud soil mixture in the restoration process, the restored red mud yard is put into planting and is easy to cause larger influence on the environment, and the difficulty of subsequent restoration and maintenance is further increased.
In order to achieve the purpose, the invention provides the following technical scheme: a red mud yard in-situ greening restoration method comprises the following restoration steps:
s1, preparing an auxiliary modifier;
s2, feeding and mixing;
s3, standing, maintaining and repairing;
s4, modifying, repairing and inspecting;
s5, and carrying out plant test planting.
According to the technical scheme, in the step S1, the preparation of the auxiliary modifier is that the modifier is mixed through mixing equipment, in the process of treatment, a certain amount of phosphogypsum and a certain amount of auxiliary modifier are selected, and the selected phosphogypsum and the selected auxiliary modifier are added into the mixing equipment to be uniformly mixed to prepare the auxiliary modifier.
According to the technical scheme, the auxiliary modifier is peat soil, biomass sawdust and humic acid;
wherein the usage amount of the phosphogypsum accounts for 10 wt% of the total amount, the usage amount of the peat soil in the auxiliary modifier accounts for 11 wt%, the usage amount of the biomass sawdust in the auxiliary modifier accounts for 3 wt%, and the usage amount of the humic acid in the auxiliary modifier accounts for 6 wt%.
According to the technical scheme, in the S2, the charging and mixing treatment refers to that the red clay and the mixed auxiliary modifier are mixed through the same mixing equipment to prepare a red clay mixture, the original alkali concentration of the red clay needs to be measured and recorded in the charging process of the red clay, and the original alkali concentration of the red clay is recorded as N1;
the method comprises the steps of fully mixing an auxiliary modifier with red mud by mixing equipment, feeding a red mud mixture in the mixing equipment into a curing pool, wherein the specification of the curing pool is 1.5m, filling two thirds of the red mud mixture into the curing pool when the red mud mixture is filled into the curing pool, filling the red mud mixture into the curing pool, enabling the volume of the filled red mud mixture to be 1m, scraping and flattening the surface of the red mud mixture after the red mud mixture is filled into the curing pool, uniformly irrigating the red mud mixture into the curing pool by a water distribution spraying mechanism after the red mud mixture is flattened, watering the red mud mixture in the curing pool for 3min, and performing film coating, film pressing and sealing treatment on the top of the curing pool after the red mud mixture is watered.
According to the technical scheme, in the step S3, the standing maintenance and repair refers to that the red mud mixture is maintained, modified and repaired after being filled into a maintenance pool;
in the process of curing modification treatment, the volume of the red mud-soil mixture needs to be calculated, the volume change of the red mud-soil mixture is calculated mainly according to the changed depth of the red mud-soil mixture in the curing pool in the calculation process, and when the depth of the cured red mud-soil mixture is changed to Hm, the volume of the cured red mud-soil mixture is 1m Hm;
during the process of maintaining and modifying the red mud-soil mixture in the maintaining tank, leachate can seep out from the maintaining tank in the first day, the second day and the third day of maintaining the red mud-soil mixture, after the leachate seeps out, the leachate seeped out from the maintaining tank in the first day, the second day and the third day is respectively collected and treated, the collected leachate is respectively conveyed to a leachate sprayer in the first day, the second day and the third day, the leachate respectively collected in the first day, the second day and the third day is subjected to leachate distribution treatment by the leachate sprayer, and the seeped leachate returns to the maintaining tank after the leachate distribution.
According to the technical scheme, in the S4, the modification repair inspection means that when the red mud-soil mixture is cured to the fifth day, the modification repair parameters of the red mud-soil mixture in the curing pond are measured;
the measurement treatment specifically comprises the measurement of the pH value of the red mud-soil mixture, the measurement of the alkali concentration remediation rate of the red mud-soil mixture and the measurement of microorganisms and organic matters in the red mud-soil mixture.
According to the technical scheme, the pH value measurement of the red mud-soil mixture specifically means that the pH value of the red mud-soil mixture after being maintained for five days is measured, the pH value measurement value is recorded, the standard pH value is set to be 8 after the pH value measurement, when the pH value of the red mud-soil mixture is greater than 8, the alkali concentration of the red mud-soil mixture is high, and when the pH value of the red mud-soil mixture is less than or equal to 8, the alkali concentration of the red mud-soil mixture meets the requirement of soil cultivation;
when the pH value of the red mud-soil mixture is less than or equal to 8, the red mud-soil mixture needs to be repeatedly detected for three times at three different positions respectively, and when the three detection results are less than or equal to 8, the red mud-soil mixture can be normally used as plowing soil for tillage;
when the pH value of the red mud-soil mixture is more than 8, the red mud-soil mixture needs to be subjected to pH value balanced neutralization treatment, the amount of the auxiliary modifier in the red mud-soil mixture is increased, the added auxiliary modifier and the original red mud-soil mixture need to be subjected to mixing and stirring treatment, the added auxiliary modifier and the original red mud-soil mixture are uniformly mixed, after the added auxiliary modifier and the original red mud-soil mixture are uniformly mixed, the red mud-soil mixture subjected to balanced neutralization treatment needs to be subjected to maintenance treatment again, and the maintenance time is three days again.
According to the technical scheme, the measurement of the alkali concentration restoration rate of the red mud-soil mixture specifically means that the alkali concentration treatment effect of the red mud-soil mixture after five days of maintenance is detected, in the measurement process, the alkali concentration of the red mud-soil mixture after five days of maintenance treatment is firstly measured, the alkali concentration of the red mud-soil mixture after maintenance treatment is recorded as N2, and then the alkali concentration restoration rate is obtained
In the above formula: n: alkali concentration repair rate, N1: original alkali concentration of gibberellic, N2: and (5) the alkali concentration of the red mud soil mixture after the curing treatment.
According to the technical scheme, the measurement of the microorganisms and the organic matters in the red mud-soil mixture specifically refers to the detection of the types and the quantity of the microorganisms and the content of the organic matters in the red mud-soil mixture after five days of maintenance.
According to the technical scheme, in the S5, the plant test planting means that after the red mud-soil mixture is maintained in the maintenance pool for five days, and the modification repair parameters of the red mud-soil mixture are measured, part of the red mud-soil mixture is selected in the maintenance pool to test and plant the plants, wherein the test and plant plants are ryegrass;
selecting plant seeds of ryegrass in the test planting process, then carrying out test planting on 100 plant seeds of ryegrass, carrying out watering maintenance regularly after planting, observing the germination rate and growth state of the ryegrass 28 days after planting, and recording the germination rate as (K/100) × 100% when the number of the germinated ryegrass is K;
after the germination rate of the test planted plants is measured, when the germination rate is more than 60%, the red mud soil mixture subjected to maintenance treatment can be normally put into the planting of the plants for use, and when the germination rate is less than 60%, the red mud soil mixture is not beneficial to the normal planting of the plants, so that when the germination rate is less than 60%, the red mud soil mixture needs to be maintained and repaired again.
Compared with the prior art, the invention has the beneficial effects that:
1. in the process of preparing the auxiliary modifier and the red mud soil mixture, the added phosphogypsum, the auxiliary modifier and the red mud soil are fully stirred and mixed, so that the auxiliary modifier can more effectively act on the maintenance and repair of the red mud soil, the actual modification and repair effect of the auxiliary modifier on the red mud soil is improved, the treated red mud soil mixture can more effectively act on the planting operation of plants, the alkalinity of the red mud soil is quickly reduced, the character of the red mud soil is improved, and the red mud soil can quickly become suitable for the growth of the plants;
and the selected modifier is mainly common waste materials which are low in price and can be continuously supplied, and meanwhile, a large amount of organic matters can be provided for the red mud soil through the test of the modifier, so that nutrients are provided for subsequently planted plants, and the planting capability of the repaired red mud soil is further improved.
2. In the process of maintaining and modifying the red mud-soil mixture, the precipitation liquid leaked out of the maintenance tank is subjected to liquid distribution treatment through the precipitation liquid spraying machine, so that the precipitation liquid leaked out of the maintenance tank can be returned back to the maintenance tank again in a liquid distribution mode, the precipitation liquid can be fully and uniformly combined with the red mud-soil mixture in the maintenance tank again, and the effect of modifying and repairing the subsequent red mud-soil mixture in the maintenance tank is further ensured.
3. After the red mud-soil mixture in the curing pond is cured and modified, the modified repair parameters of the red mud-soil mixture in the curing pond are measured, so that the workers can conveniently know the pH value of the red mud-soil mixture, the alkali concentration repair rate of the red mud-soil mixture and the quantity of microorganisms and organic matters, and the pH value of the red mud-soil mixture, the alkali concentration repair rate of the red mud-soil mixture and the quantity of the microorganisms and organic matters are measured, so that people can clearly and clearly know the pH value, the alkali concentration treatment effect and the action of the microorganisms and the organic matters of the cured and repaired red mud-soil mixture, and can conveniently judge the modified repair effect of the red mud-soil mixture in time, and further the repaired red mud-soil mixture can be conveniently and subsequently put into planting for use.
4. On the basis of measuring the pH value, the alkali concentration remediation rate and the quantity of microorganisms and organic matters of the red mud soil mixture, the invention can put the remediated red mud soil mixture into test planting for use by a test planting method before the red mud soil mixture is actually put into planting, further, the planting effect of the repaired red mud soil mixture on plants can be further accurately judged through an actual test planting method on the basis of the measurement of the modified repairing parameters, and whether the red mud soil mixture after the restoration can be formally put into the planting and use of the plants or not can be conveniently judged according to the germination percentage by calculating the germination percentage of the plants planted in the test, and the actual planting effect of the red mud soil mixture on plants can be conveniently determined in a small-scale manner, and the direct use without judgment can be prevented, so that the environmental pollution and the loss of plant resources are prevented.
In the process of repairing the red mud soil, the pH value, the alkali concentration repair rate, the amount of microorganisms and organic matters of the red mud soil mixture are measured and tested to plant, so that the red mud soil mixture is prevented from being undetected and treated, the red mud soil mixture causes deeper pollution to the environment, secondary pollution caused by the red mud soil is prevented, and the subsequent treatment difficulty of secondary repair of the repaired red mud soil by people is reduced.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a flow chart of the steps of the repair method of the present invention.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
Example 1: as shown in fig. 1, the present invention provides a technical solution, a method for repairing red mud disposal site by in-situ greening, comprising the following repairing steps:
s1, preparing an auxiliary modifier;
s2, feeding and mixing;
s3, standing, maintaining and repairing;
s4, modifying, repairing and inspecting;
s5, and carrying out plant test planting.
Based on the technical scheme, in the step S1, the preparation of the auxiliary modifier is that the modifier is mixed by mixing equipment, in the process of treatment, a certain amount of phosphogypsum and a certain amount of auxiliary modifier are firstly selected, and the selected phosphogypsum and the selected auxiliary modifier are added into the mixing equipment to be uniformly mixed to prepare the auxiliary modifier.
Based on the technical scheme, the auxiliary modifier is peat soil, biomass sawdust and humic acid;
wherein the usage amount of the phosphogypsum accounts for 10 wt% of the total amount, the usage amount of the peat soil in the auxiliary modifier accounts for 11 wt%, the usage amount of the biomass sawdust in the auxiliary modifier accounts for 3 wt%, and the usage amount of the humic acid in the auxiliary modifier accounts for 6 wt%.
Based on the technical scheme, in S2, the charging and mixing treatment refers to that red clay and an auxiliary modifier prepared after mixing are mixed through the same mixing equipment to prepare a red clay mixture, in the charging process of the red clay, the original alkali concentration of the red clay needs to be measured and recorded, and the original alkali concentration of the red clay is recorded as N1;
the method comprises the steps of fully mixing an auxiliary modifier with red mud by mixing equipment, feeding a red mud mixture in the mixing equipment into a curing pool, wherein the specification of the curing pool is 1.5m, filling two thirds of the red mud mixture into the curing pool when the red mud mixture is filled into the curing pool, filling the red mud mixture into the curing pool, enabling the volume of the filled red mud mixture to be 1m, scraping and flattening the surface of the red mud mixture after the red mud mixture is filled into the curing pool, uniformly irrigating the red mud mixture into the curing pool by a water distribution spraying mechanism after the red mud mixture is flattened, watering the red mud mixture in the curing pool for 2min, and performing film covering, film pressing and sealing treatment on the top of the curing pool after the red mud mixture is watered.
Based on the technical scheme, in S3, standing maintenance and repair refers to performing maintenance, modification and repair treatment on the red mud mixture after the red mud mixture is filled into a maintenance pool;
in the process of curing modification treatment, the volume of the red mud-soil mixture needs to be calculated, the volume change of the red mud-soil mixture is calculated mainly according to the changed depth of the red mud-soil mixture in the curing pool in the calculation process, and when the depth of the cured red mud-soil mixture is changed to Hm, the volume of the cured red mud-soil mixture is 1m Hm;
during the process of maintaining and modifying the red mud-soil mixture in the maintaining tank, leachate can seep out from the maintaining tank in the first day, the second day and the third day of maintaining the red mud-soil mixture, after the leachate seeps out, the leachate seeped out from the maintaining tank in the first day, the second day and the third day is respectively collected and treated, the collected leachate is respectively conveyed to a leachate sprayer in the first day, the second day and the third day, the leachate respectively collected in the first day, the second day and the third day is subjected to leachate distribution treatment by the leachate sprayer, and the seeped leachate returns to the maintaining tank after the leachate distribution.
Based on the technical scheme, in the S4, the modification repair inspection means that when the red mud-soil mixture is cured to the fifth day, the modification repair parameters of the red mud-soil mixture in the curing pond are measured;
the measurement treatment specifically comprises the measurement of the pH value of the red mud-soil mixture, the measurement of the alkali concentration remediation rate of the red mud-soil mixture and the measurement of microorganisms and organic matters in the red mud-soil mixture.
Based on the technical scheme, the pH value measurement of the red mud-soil mixture specifically means that the pH value of the red mud-soil mixture after being maintained for five days is measured, the pH value measurement value is recorded, the standard pH value is set to be 8 after the pH value measurement, and when the pH value of the red mud-soil mixture is less than or equal to 8, the alkali concentration of the red mud-soil mixture meets the requirement of soil cultivation;
and when the pH value of the red mud soil mixture is less than or equal to 8, the red mud soil mixture needs to be repeatedly detected for three times at three different positions respectively, and when the three detection results are less than or equal to 8, the red mud soil mixture can be normally used as plowing soil to be put into cultivation.
Based on the technical scheme, the measurement of the alkali concentration restoration rate of the red mud-soil mixture specifically means that the alkali concentration treatment effect of the red mud-soil mixture after five days of maintenance is detected, in the measurement process, the alkali concentration of the red mud-soil mixture after five days of maintenance treatment is firstly measured, the alkali concentration of the red mud-soil mixture after maintenance treatment is recorded as N2, and then the alkali concentration restoration rate is obtained
In the above formula: n: alkali concentration repair rate, N1: original alkali concentration of gibberellic, N2: and (5) the alkali concentration of the red mud soil mixture after the curing treatment.
Based on the technical scheme, the measurement of the microorganisms and the organic matters in the red mud-soil mixture specifically refers to the detection of the types and the quantity of the microorganisms and the content of the organic matters in the red mud-soil mixture after five days of maintenance.
Based on the technical scheme, in S5, the plant test planting means that after the red mud-soil mixture is maintained in the maintenance pool for five days, and the modification repair parameters of the red mud-soil mixture are measured, part of the red mud-soil mixture is selected in the maintenance pool to test and plant the plants, wherein the plants to be tested and planted are ryegrass;
selecting plant seeds of ryegrass in the test planting process, then carrying out test planting on 100 plant seeds of ryegrass, carrying out watering maintenance regularly after planting, observing the germination rate and growth state of the ryegrass 28 days later, and recording the number of the germinated ryegrass as K, wherein the survival rate is (K/100) × 100%;
after the germination rate of the test planted plants is measured, when the germination rate is more than 60%, the red mud soil mixture subjected to maintenance treatment can be normally put into the planting of the plants for use, and when the germination rate is less than 60%, the red mud soil mixture is not beneficial to the normal planting of the plants, so that when the germination rate is less than 60%, the red mud soil mixture needs to be maintained and repaired again.
Example 2: as shown in fig. 1, the present invention provides a technical solution, a method for repairing red mud disposal site by in-situ greening, comprising the following repairing steps:
s1, preparing an auxiliary modifier;
s2, feeding and mixing;
s3, standing, maintaining and repairing;
s4, modifying, repairing and inspecting;
s5, and carrying out plant test planting.
Based on the technical scheme, in the step S1, the preparation of the auxiliary modifier is that the modifier is mixed by mixing equipment, in the process of treatment, a certain amount of phosphogypsum and a certain amount of auxiliary modifier are firstly selected, and the selected phosphogypsum and the selected auxiliary modifier are added into the mixing equipment to be uniformly mixed to prepare the auxiliary modifier.
Based on the technical scheme, the auxiliary modifier is peat soil, biomass sawdust and humic acid;
wherein the usage amount of the phosphogypsum accounts for 10 wt% of the total amount, the usage amount of the peat soil in the auxiliary modifier accounts for 11 wt%, the usage amount of the biomass sawdust in the auxiliary modifier accounts for 3 wt%, and the usage amount of the humic acid in the auxiliary modifier accounts for 6 wt%.
Based on the technical scheme, in S2, the charging and mixing treatment refers to that red clay and an auxiliary modifier prepared after mixing are mixed through the same mixing equipment to prepare a red clay mixture, in the charging process of the red clay, the original alkali concentration of the red clay needs to be measured and recorded, and the original alkali concentration of the red clay is recorded as N1;
the method comprises the steps of fully mixing an auxiliary modifier with red mud by mixing equipment, feeding a red mud mixture in the mixing equipment into a curing pool, wherein the specification of the curing pool is 1.5m, filling two thirds of the red mud mixture into the curing pool when the red mud mixture is filled into the curing pool, filling the red mud mixture into the curing pool, enabling the volume of the filled red mud mixture to be 1m, scraping and flattening the surface of the red mud mixture after the red mud mixture is filled into the curing pool, uniformly irrigating the red mud mixture into the curing pool by a water distribution spraying mechanism after the red mud mixture is flattened, watering the red mud mixture in the curing pool for 2min, and performing film covering, film pressing and sealing treatment on the top of the curing pool after the red mud mixture is watered.
Based on the technical scheme, in S3, standing maintenance and repair refers to performing maintenance, modification and repair treatment on the red mud mixture after the red mud mixture is filled into a maintenance pool;
in the process of curing modification treatment, the volume of the red mud-soil mixture needs to be calculated, the volume change of the red mud-soil mixture is calculated mainly according to the changed depth of the red mud-soil mixture in the curing pool in the calculation process, and when the depth of the cured red mud-soil mixture is changed to Hm, the volume of the cured red mud-soil mixture is 1m Hm;
during the process of maintaining and modifying the red mud-soil mixture in the maintaining tank, leachate can seep out from the maintaining tank in the first day, the second day and the third day of maintaining the red mud-soil mixture, after the leachate seeps out, the leachate seeped out from the maintaining tank in the first day, the second day and the third day is respectively collected and treated, the collected leachate is respectively conveyed to a leachate sprayer in the first day, the second day and the third day, the leachate respectively collected in the first day, the second day and the third day is subjected to leachate distribution treatment by the leachate sprayer, and the seeped leachate returns to the maintaining tank after the leachate distribution.
Based on the technical scheme, in the S4, the modification repair inspection means that when the red mud-soil mixture is cured to the fifth day, the modification repair parameters of the red mud-soil mixture in the curing pond are measured;
the measurement treatment specifically comprises the measurement of the pH value of the red mud-soil mixture, the measurement of the alkali concentration remediation rate of the red mud-soil mixture and the measurement of microorganisms and organic matters in the red mud-soil mixture.
Based on the technical scheme, the pH value measurement of the red mud-soil mixture specifically means that the pH value of the red mud-soil mixture after being maintained for five days is measured, the pH value measurement value is recorded, the standard pH value is set to be 8 after the pH value measurement, and when the pH value of the red mud-soil mixture is greater than 8, the alkali concentration of the red mud-soil mixture is high;
when the pH value of the red mud-soil mixture is more than 8, the pH value balancing neutralization treatment needs to be carried out on the red mud-soil mixture, when the pH value is more than 8, the amount of the auxiliary modifier in the red mud-soil mixture needs to be increased, when the pH value balancing treatment is carried out on the red mud-soil mixture by adding the amount of the auxiliary modifier, the added auxiliary modifier and the original red mud-soil mixture need to be mixed and stirred, so that the added auxiliary modifier and the original red mud-soil mixture are uniformly mixed, after the added auxiliary modifier and the original red mud-soil mixture are uniformly mixed, the red mud-soil mixture after the balancing neutralization treatment needs to be maintained again, and the maintenance time is three days again.
Based on the technical scheme, the measurement of the alkali concentration restoration rate of the red mud-soil mixture specifically means that the alkali concentration treatment effect of the red mud-soil mixture after five days of maintenance is detected, in the measurement process, the alkali concentration of the red mud-soil mixture after five days of maintenance treatment is firstly measured, the alkali concentration of the red mud-soil mixture after maintenance treatment is recorded as N2, and then the alkali concentration restoration rate is obtained
In the above formula: n: alkali concentration repair rate, N1: original alkali concentration of gibberellic, N2: and (5) the alkali concentration of the red mud soil mixture after the curing treatment.
Based on the technical scheme, the measurement of the microorganisms and the organic matters in the red mud-soil mixture specifically refers to the detection of the types and the quantity of the microorganisms and the content of the organic matters in the red mud-soil mixture after five days of maintenance.
Based on the technical scheme, in S5, the plant test planting means that after the red mud-soil mixture is maintained in the maintenance pool for five days, and the modification repair parameters of the red mud-soil mixture are measured, part of the red mud-soil mixture is selected in the maintenance pool to test and plant the plants, wherein the plants to be tested and planted are ryegrass;
selecting plant seeds of ryegrass in the test planting process, then carrying out test planting on 100 plant seeds of ryegrass, carrying out watering maintenance regularly after planting, observing the germination rate and growth state of the ryegrass 28 days after planting, and recording the germination rate as (K/100) × 100% when the number of the germinated ryegrass is K;
after the germination rate of the test planted plants is measured, when the germination rate is more than 60%, the red mud soil mixture subjected to maintenance treatment can be normally put into the planting of the plants for use, and when the germination rate is less than 60%, the red mud soil mixture is not beneficial to the normal planting of the plants, so that when the germination rate is less than 60%, the red mud soil mixture needs to be maintained and repaired again.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A red mud yard in-situ greening restoration method is characterized by comprising the following steps: the method comprises the following repairing steps:
s1, preparing an auxiliary modifier;
s2, feeding and mixing;
s3, standing, maintaining and repairing;
s4, modifying, repairing and inspecting;
s5, and carrying out plant test planting.
2. The red mud disposal site in-situ greening restoration method according to claim 1, which is characterized by comprising the following steps: in the S1, the preparation of the auxiliary modifier refers to mixing the modifiers through mixing equipment, in the process of treatment, a certain amount of phosphogypsum and a certain amount of auxiliary modifier are firstly selected, and the selected phosphogypsum and the selected auxiliary modifier are added into the mixing equipment to be uniformly mixed to prepare the auxiliary modifier.
3. The red mud disposal site in-situ greening restoration method according to claim 2, characterized by comprising the following steps: the auxiliary modifier is one or more of peat soil, biomass sawdust, straw, peanut shells, rice hulls, humic acid, vermiculite and perlite;
wherein the usage amount of the phosphogypsum accounts for 4-15 wt% of the total amount, the usage amount of the peat soil in the auxiliary modifier accounts for 5-15 wt% of the total amount, the usage amount of the biomass sawdust in the auxiliary modifier accounts for 1-4 wt% of the total amount, and the usage amount of the humic acid in the auxiliary modifier accounts for 3-7 wt% of the total amount.
4. The red mud disposal site in-situ greening restoration method according to claim 2, characterized by comprising the following steps: in the S2, the charging and mixing treatment refers to that the red clay and the auxiliary modifier prepared after mixing are mixed through the same mixing equipment to prepare a red clay mixture, the original alkali concentration of the red clay needs to be measured and recorded in the charging process of the red clay, and the original alkali concentration of the red clay is recorded as N1;
the method comprises the steps of fully mixing an auxiliary modifier with red mud by mixing equipment, feeding a red mud mixture in the mixing equipment into a curing pool, wherein the specification of the curing pool is 1.5m, filling two thirds of the red mud mixture into the curing pool when the red mud mixture is filled into the curing pool, filling the red mud mixture into the curing pool, enabling the volume of the filled red mud mixture to be 1m, scraping and flattening the surface of the red mud mixture after the red mud mixture is filled into the curing pool, uniformly irrigating the red mud mixture into the curing pool by a water distribution spraying machine after the red mud mixture is flattened, watering the red mud mixture in the curing pool for controlled watering time to be 1-3min, and performing film covering, film pressing and sealing treatment on the top of the curing pool after the red mud mixture is watered.
5. The red mud disposal site in-situ greening restoration method according to claim 4, characterized by comprising the following steps: in the step S3, the standing maintenance and repair means that the red mud mixture is maintained, modified and repaired after being filled into the maintenance tank;
in the process of curing modification treatment, the volume of the red mud-soil mixture needs to be calculated, the volume change of the red mud-soil mixture is calculated mainly according to the changed depth of the red mud-soil mixture in the curing pool in the calculation process, and when the depth of the cured red mud-soil mixture is changed to Hm, the volume of the cured red mud-soil mixture is 1m Hm;
during the process of maintaining and modifying the red mud-soil mixture in the maintaining tank, leachate can seep out from the maintaining tank in the first day, the second day and the third day of maintaining the red mud-soil mixture, after the leachate seeps out, the leachate seeped out from the maintaining tank in the first day, the second day and the third day is respectively collected and treated, the collected leachate is respectively conveyed to a leachate sprayer in the first day, the second day and the third day, the leachate respectively collected in the first day, the second day and the third day is subjected to leachate distribution treatment by the leachate sprayer, and the seeped leachate returns to the maintaining tank after the leachate distribution.
6. The red mud disposal site in-situ greening restoration method according to claim 5, characterized by comprising the following steps: in the step S4, the modification repair inspection means that the modification repair parameters of the red mud mixture in the curing pond are measured when the red mud mixture is cured to the fifth day;
the measurement treatment specifically comprises the measurement of the pH value of the red mud-soil mixture, the measurement of the alkali concentration remediation rate of the red mud-soil mixture and the measurement of microorganisms and organic matters in the red mud-soil mixture.
7. The red mud disposal site in-situ greening restoration method according to claim 6, which is characterized by comprising the following steps: the measurement of the pH value of the red mud-soil mixture specifically means that the pH value of the red mud-soil mixture after five days of maintenance is measured, the measured value of the pH value is recorded, a standard pH value is set to be 8 after the measurement of the pH value, when the pH value of the red mud-soil mixture is greater than 8, the alkali concentration of the red mud-soil mixture is high, and when the pH value of the red mud-soil mixture is less than or equal to 8, the alkali concentration of the red mud-soil mixture meets the requirement of soil cultivation;
when the pH value of the red mud-soil mixture is less than or equal to 8, the red mud-soil mixture needs to be repeatedly detected for three times at three different positions respectively, and when the three detection results are less than or equal to 8, the red mud-soil mixture can be normally used as plowing soil for tillage;
when the pH value of the red mud-soil mixture is more than 8, the red mud-soil mixture needs to be subjected to pH value balanced neutralization treatment, the amount of the auxiliary modifier in the red mud-soil mixture is increased, the added auxiliary modifier and the original red mud-soil mixture need to be subjected to mixing and stirring treatment, the added auxiliary modifier and the original red mud-soil mixture are uniformly mixed, after the added auxiliary modifier and the original red mud-soil mixture are uniformly mixed, the red mud-soil mixture subjected to balanced neutralization treatment needs to be subjected to maintenance treatment again, and the maintenance time is three days again.
8. The red mud disposal site in-situ greening restoration method according to claim 6, which is characterized by comprising the following steps: the measurement of the alkali concentration restoration rate of the red mud-soil mixture specifically refers to the detection of the alkali concentration treatment effect of the red mud-soil mixture after five days of maintenance, in the measurement process, the alkali concentration of the red mud-soil mixture after five days of maintenance treatment is firstly measured, and the alkali concentration of the red mud-soil mixture after maintenance treatment is recorded as N2, so that the alkali concentration restoration rate is obtained
In the above formula: n: alkali concentration repair rate, N1: original alkali concentration of gibberellic, N2: and (5) the alkali concentration of the red mud soil mixture after the curing treatment.
9. The red mud disposal site in-situ greening restoration method according to claim 6, which is characterized by comprising the following steps: the measurement of the microorganisms and the organic matters in the red mud-soil mixture specifically refers to the detection of the types and the quantity of the microorganisms and the content of the organic matters in the red mud-soil mixture after five days of maintenance.
10. The red mud disposal site in-situ greening restoration method according to claim 6, which is characterized by comprising the following steps: in the S5, the plant test planting means that after the red mud-soil mixture is maintained in the maintenance pool for five days, and the modified repair parameters of the red mud-soil mixture are measured, part of the red mud-soil mixture is selected in the maintenance pool to test and plant the plant, wherein the plant to be tested and planted comprises one of ryegrass, festuca arundinacea, alfalfa, elymus and awnless brome;
selecting a test planting plant seed in the test planting process, then sowing 100 test planting plant seeds, after planting, carrying out watering maintenance regularly, and after planting for 28 days, observing the germination rate and the growth state of the test planting plant, and recording that the number of the test planting plant to sprout is K, and the germination rate is (K/100) × 100%;
after the germination rate of the test planted plants is measured, when the germination rate is more than 60%, the red mud soil mixture subjected to maintenance treatment can be normally put into the planting of the plants for use, and when the germination rate is less than 60%, the red mud soil mixture is not beneficial to the normal planting of the plants, so that when the germination rate is less than 60%, the red mud soil mixture needs to be maintained and repaired again.
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