CN114029334A - Method for rapidly measuring mixing uniformity of medicament in contaminated soil remediation construction site - Google Patents
Method for rapidly measuring mixing uniformity of medicament in contaminated soil remediation construction site Download PDFInfo
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- CN114029334A CN114029334A CN202111463989.6A CN202111463989A CN114029334A CN 114029334 A CN114029334 A CN 114029334A CN 202111463989 A CN202111463989 A CN 202111463989A CN 114029334 A CN114029334 A CN 114029334A
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- 239000002689 soil Substances 0.000 title claims abstract description 70
- 238000005067 remediation Methods 0.000 title claims abstract description 50
- 238000002156 mixing Methods 0.000 title claims abstract description 45
- 238000000034 method Methods 0.000 title claims abstract description 43
- 238000010276 construction Methods 0.000 title claims abstract description 13
- 239000003814 drug Substances 0.000 title claims abstract description 11
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 39
- 239000000700 radioactive tracer Substances 0.000 claims abstract description 28
- 239000000126 substance Substances 0.000 claims abstract description 25
- 239000000696 magnetic material Substances 0.000 claims abstract description 7
- 238000005070 sampling Methods 0.000 claims abstract description 6
- 238000007885 magnetic separation Methods 0.000 claims abstract description 5
- 238000007599 discharging Methods 0.000 claims abstract description 3
- 239000007787 solid Substances 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 3
- 239000003153 chemical reaction reagent Substances 0.000 claims 3
- 238000005516 engineering process Methods 0.000 description 6
- 238000003756 stirring Methods 0.000 description 5
- 229910001385 heavy metal Inorganic materials 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000003647 oxidation Effects 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 238000007711 solidification Methods 0.000 description 3
- 230000008023 solidification Effects 0.000 description 3
- 230000006641 stabilisation Effects 0.000 description 3
- 238000011105 stabilization Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 241000209140 Triticum Species 0.000 description 1
- 235000021307 Triticum Nutrition 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 1
- 235000013339 cereals Nutrition 0.000 description 1
- ZXJXZNDDNMQXFV-UHFFFAOYSA-M crystal violet Chemical compound [Cl-].C1=CC(N(C)C)=CC=C1[C+](C=1C=CC(=CC=1)N(C)C)C1=CC=C(N(C)C)C=C1 ZXJXZNDDNMQXFV-UHFFFAOYSA-M 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011545 laboratory measurement Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000010561 standard procedure Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/08—Reclamation of contaminated soil chemically
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/24—Earth materials
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- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Geology (AREA)
- Soil Sciences (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Physics & Mathematics (AREA)
- Remote Sensing (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention relates to a method for rapidly measuring the mixing uniformity of a medicament on a contaminated soil remediation construction site, which comprises the following steps: step 1, before the contaminated soil is mixed with the remediation agent, the magnetic tracer substance and the remediation agent are simultaneously put into the contaminated soil through a feeding port of the equipment, and the contaminated soil and the agent are uniformly mixed in a mixing section; step 2, randomly and quantitatively sampling at the discharging section to be used as an original sample; and making a test sample from the original sample; step 3, separating the magnetic material in the test sample by using magnetic separation equipment; and 4, comparing the quantity of the magnetic materials in different samples to be used as a basis for judging the mixing uniformity of the polluted soil and the remediation agent. The method can provide data support for rapidly judging the uniform mixing degree of the polluted soil and the remediation agent on site, and improves the site construction efficiency.
Description
Technical Field
The invention belongs to the field of environmental protection, and particularly relates to a method for rapidly measuring the mixing uniformity of a medicament in a contaminated soil remediation construction site.
Background
At present, the remediation technologies related to the process of mixing the contaminated soil and remediation agent in the remediation process of the contaminated soil in China comprise a solidification and stabilization technology for the heavy metal contaminated soil, a chemical oxidation technology for the organic contaminated soil, a normal-temperature thermal desorption technology and the like. The technology relates to a working section for mixing the crushed polluted soil with the powdery repairing agent in the application process, and the repairing effect is directly influenced by the uniform mixing degree of the polluted soil and the powdery repairing agent. The patent of the invention with the publication number of CN102921713B and the name of 'a heavy metal polluted soil solidification and stabilization treatment process' specifically proposes that the uniform mixing between the curing agent and the soil is realized by strong stirring. The invention patent with the publication number of CN101648207B and the name of 'a chemical oxidation remediation method and remediation equipment for organic matter contaminated soil' specifically provides 'stirring the three preparations in a reactor by a stirrer so as to fully mix the three preparations with the contaminated soil'. The invention patent with the patent application number of CN201711486858.3 and the name of 'a medicament for restoring cadmium contaminated soil in farmland in northern wheat planting area and a use method' specifically provides a use method of the medicament, which comprises the step of mixing and reacting contaminated soil with an activating agent and a passivating agent. The above patent contents show that the mixing process of the contaminated soil and the remediation agent is an essential process in the above-mentioned remediation technology or the use process of the remediation agent, but the above patent does not suggest how to determine whether the curing agent and the soil are uniformly mixed by stirring.
At present, no standard method is provided for measuring the mixing uniformity of the polluted soil and the remediation agent in the soil remediation industry in China. In probability theory and statistics, the coefficient of variation is a measure of the degree of variation of each observation. The use of coefficient of variation eliminates the effect of unit and mean numbers on the comparison of the degree of variation of two or more materials.
At present, two laboratory measurement methods are used for judging the mixing uniformity degree of the polluted soil and the remediation agent, namely a chloride ion selective electrode method and a methyl violet method, but the methods only can sample on site firstly and then obtain a result through laboratory detection and analysis, so that the time consumption is long, and the site construction is seriously influenced. Therefore, the invention provides a method for rapidly judging the mixing degree of the polluted soil and the remediation agent on site, and the construction efficiency can be greatly improved by using the method on the remediation site of the polluted site.
Disclosure of Invention
The invention aims to provide a rapid detection method for measuring the mixing uniformity of polluted soil and remediation agent in a polluted soil remediation construction site, so that the remediation efficiency is greatly improved.
The specific technical scheme of the invention is as follows:
a method for rapidly measuring the mixing uniformity of a medicament in a contaminated soil remediation construction site comprises the following steps:
step 1, before the contaminated soil is mixed with the remediation agent, the magnetic tracer substance and the remediation agent are simultaneously put into the contaminated soil through a feeding port of the equipment, and the contaminated soil and the agent are uniformly mixed in a mixing section;
step 2, randomly and quantitatively sampling at the discharging section to be used as an original sample; and making a test sample from the original sample;
step 3, separating the magnetic material in the test sample by using magnetic separation equipment;
and 4, comparing the quantity of the magnetic materials in different samples to be used as a basis for judging the mixing uniformity of the polluted soil and the remediation agent.
In the step 1, the magnetic tracer substance is a powdery solid, and the repairing medicament is also a powdery solid;
in the step 2, 10 parts of original samples are randomly and equally measured at the discharge port of the mixing equipment according to each repair batch, and the weight of each part of original sample is preferably 2000 g.
In the step 3, the magnetic separation equipment is preferably a handheld portable magnetic rod, and the handheld portable magnetic rod is continuously stirred in the test sample for multiple times.
In the step 4, the quantity of all the magnetic tracer substances selected by the handheld portable magnetic bar in each sample is recorded.
Further, in the step 1, the magnetic tracer substance is solid powder, and the particle size is preferably 20-80 meshes.
Furthermore, in the step 2, the soil restoration amount of each batch is preferably less than or equal to 500, the depth and batch representativeness of each direction are considered for determining the sampling point position of the sample, one sample is collected in one point position in a centralized manner, and no turning or mixing is allowed during sampling. Then, each of the original samples was mixed well, and 500g of the original samples were randomly and equally divided one by a quartering method as test samples.
Further, in the step 3, any end of the hand-held portable magnetic rod is held, and the magnetic force absorption section is continuously stirred in the test sample for the same number of times.
Further, in the step 4, after the magnetic tracer is absorbed on the surface of the handheld portable magnetic rod, the sleeve pipe matched with the magnetic rod is taken down to remove the magnetic tracer, and the number X of the collected magnetic tracer is recorded. The numbers of the tracer in all the test samples were determined in the same manner and are respectively designated as X1, X2 and X3. cndot. X10.
Calculating the average value X and the standard deviation S, and calculating the coefficient of variation CV according to the X and S values.
Average value:
standard deviation:
coefficient of variation:
the value of the mixing uniformity is represented by the coefficient of variation CV of the amount of the magnetic tracer in 10 test samples of the same batch, and the larger the CV value, the worse the mixing uniformity.
Drawings
FIG. 1 is a schematic diagram showing the steps of the measurement method of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to field embodiments.
The device with the patent publication number of CN204074695U is commonly used for curing and stabilizing remediation of heavy metal contaminated soil and chemical oxidation remediation of organic contaminated soil. In actual construction operation, the degree of uniform mixing of the contaminated soil and the remediation agent is difficult to rapidly judge, and the contaminated soil and the remediation agent are sent to a laboratory for detection by field sampling, so that the construction efficiency is greatly influenced. In order to solve the problem, technical personnel adopt the method provided by the invention, adopt a magnetic material with the grain diameter passing through a 40-mesh sieve as a tracer agent on site, add the tracer agent and a repairing agent into the polluted soil together, mix and stir the polluted soil on site through a device with the publication number of CN204074695U, randomly take 10 original samples from the polluted soil treated in batches, and prepare 10 test samples one by adopting a quartering method. The hand-held portable magnetic rod provided by the invention is used for absorbing the magnetic tracer materials in the test sample, the number X1-X10 of the magnetic tracer materials in each sample is recorded, the variation coefficient CV of the mixing uniformity of the polluted soil and the repairing agent in different projects is calculated, and the detailed results are shown in Table 1.
Table 1 in different items, the variation coefficient CV of the mixing uniformity of the contaminated soil and the remediation agent
The implementation steps are as follows:
(1) the method comprises the steps of uniformly feeding 500-square polluted soil on site from a feed inlet of the KH200 soil remediation all-in-one machine by using an excavator, and simultaneously feeding a polluted soil remediation agent and a magnetic tracer substance with the particle size of 40 meshes into a chemical bin. Setting operation parameters of the KH200 restoration all-in-one machine, wherein the feeding speed of the polluted soil is 250 square/hour, the adding speed of the medicament is 9.75 tons/hour (the adding amount of the medicament is 3 percent of the weight of the polluted soil, and the soil density is calculated according to 1.3 tons/square), and the adding speed of the magnetic tracer substance is 2 kilograms/hour.
(2) After the three materials (contaminated soil, remediation agent and magnetic tracer substance) pass through the uniform mixing system of the KH200 remediation all-in-one machine, 10 original samples are taken at different positions and depths of the discharge end by adopting a system point distribution method. Respectively and fully mixing the original samples, randomly separating 500g by adopting a quartering method to serve as a test sample, putting the test sample into a No. 10 self-sealing bag, and numbering samples 1-10.
(3) And (3) holding the magnetic rod by a field operator, inserting the magnetic absorption section into the sample 1 self-sealing bag filled with the test sample, fully stirring for 10 times, and taking out.
(4) And (4) removing the sleeve outside the magnetic rod, collecting the attracted magnetic tracer substances into a No. 5 self-sealing bag, and recording the quantity X1 of the collected magnetic tracer substances. The sequence is carried out to obtain the quantity of the magnetic tracer substances X1, X2. cndot. X10 in 10 test samples. Calculating the average value X and the standard deviation S, and calculating the coefficient of variation CV according to the X and S values.
And (3) field measurement results:
the method provided by the patent is respectively implemented on the fields of a heavy metal polluted soil solidification and stabilization repair project of Anhui born by the applicant and a chemical oxidation repair project of Taiyuan organic polluted soil, and the variation coefficient of the mixing degree of the polluted soil and the repair agent in the former field is 11.18 and is higher than 8.96 in the latter field, so that the polluted soil and the repair agent in the latter field are mixed more uniformly. The method is implemented in the two sites for about 3 hours, and saves more than 48 hours compared with the traditional method. The method provides data support for rapidly judging the uniform mixing degree of the polluted soil and the remediation agent on site, and improves the site construction efficiency.
Claims (9)
1. A method for rapidly measuring the mixing uniformity of a medicament on a contaminated soil remediation construction site is characterized by comprising the following steps:
step 1, before the contaminated soil is mixed with the remediation agent, the magnetic tracer substance and the remediation agent are simultaneously put into the contaminated soil through a feeding port of the equipment, and the contaminated soil and the agent are uniformly mixed in a mixing section;
step 2, randomly and quantitatively sampling at the discharging section to be used as an original sample; and making a test sample from the original sample;
step 3, separating the magnetic material in the test sample by using magnetic separation equipment;
and 4, comparing the quantity of the magnetic materials in different samples to be used as a basis for judging the mixing uniformity of the polluted soil and the remediation agent.
2. The method for rapidly determining the mixing uniformity of the chemicals for the contaminated soil remediation site of claim 1,
in the step 1, the magnetic tracer substance is a powdery solid, and the repair agent is also a powdery solid.
3. The method for rapidly determining the mixing uniformity of the reagents used in the contaminated soil remediation job site of claim 2,
the particle size of the magnetic tracer substance is 20-80 meshes.
4. The method for rapidly determining the mixing uniformity of the chemicals for the contaminated soil remediation site of claim 1,
in the step 2, 10 parts of original samples are randomly and equally measured at a discharge port of the mixing equipment according to each repair batch, and the weight of each part of original sample is less than or equal to 2000 g.
5. The method for rapidly determining the mixing uniformity of the reagents used in the contaminated soil remediation job site of claim 4,
the soil restoration amount of each batch is less than or equal to 500 squares, and 500g of original samples are randomly and equally divided one by adopting a quartering method to serve as test samples.
6. The method for rapidly determining the mixing uniformity of the chemicals for the contaminated soil remediation site of claim 1,
in the step 3, the magnetic separation equipment is a handheld portable magnetic rod.
7. The method for rapidly determining the mixing uniformity of the reagents used in the contaminated soil remediation job site of claim 6,
the magnetically attracted segment of the hand-held portable magnetic rod was continuously stirred in the test sample the same number of times.
8. The method for rapidly determining the mixing uniformity of the chemicals for the contaminated soil remediation site of claim 1,
in the step 4, the quantity of all the magnetic tracer substances selected by the handheld portable magnetic bar in each sample is recorded.
9. The method for rapidly determining the mixing uniformity of the chemicals for the contaminated soil remediation site of claim 8,
after the surface of the handheld portable magnetic rod adsorbs the magnetic tracer, the sleeve matched with the magnetic rod is taken down to remove the magnetic tracer, and the number X of the collected magnetic tracer is recorded; sequentially measuring the number of the tracers in all the test samples by the same method, and respectively recording the numbers as X1, X2 and X3. cndot. X10;
calculating an average value X and a standard deviation S, and calculating a coefficient of variation CV according to the values of X and S;
average value:
standard deviation:
coefficient of variation:
the value of the mixing uniformity is represented by the coefficient of variation CV of the amount of the magnetic tracer in 10 test samples of the same batch, and the larger the CV value, the worse the mixing uniformity.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111463989.6A CN114029334A (en) | 2021-12-03 | 2021-12-03 | Method for rapidly measuring mixing uniformity of medicament in contaminated soil remediation construction site |
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| CN202111463989.6A CN114029334A (en) | 2021-12-03 | 2021-12-03 | Method for rapidly measuring mixing uniformity of medicament in contaminated soil remediation construction site |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115931914A (en) * | 2022-11-15 | 2023-04-07 | 东南大学 | Microwave probe, test system and method for testing uniformity of mixing of polluted soil |
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| CN108723082A (en) * | 2018-06-22 | 2018-11-02 | 煜环环境科技有限公司 | A kind of load fixed combined contamination soil chemical oxidation restorative procedure |
| CN109054847A (en) * | 2018-06-28 | 2018-12-21 | 北京建工环境修复股份有限公司 | A kind of engineer application method of lead-contaminated soil reparation medicament and the medicament |
| CN110293126A (en) * | 2019-05-27 | 2019-10-01 | 上海傲江生态环境科技有限公司 | One kind is for arsenic and antimony pollution soil remediation medicament and its application method |
| CN110369488A (en) * | 2019-07-30 | 2019-10-25 | 上海格林曼环境技术有限公司 | A kind of preparation and application for the medicament that the stabilisation for mercury contaminated soil is repaired |
-
2021
- 2021-12-03 CN CN202111463989.6A patent/CN114029334A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106404584A (en) * | 2016-04-15 | 2017-02-15 | 南京国轩电池有限公司 | Evaluation method for dry mixing uniformity of admixture slurry powder used for lithium ion battery |
| CN108723082A (en) * | 2018-06-22 | 2018-11-02 | 煜环环境科技有限公司 | A kind of load fixed combined contamination soil chemical oxidation restorative procedure |
| CN109054847A (en) * | 2018-06-28 | 2018-12-21 | 北京建工环境修复股份有限公司 | A kind of engineer application method of lead-contaminated soil reparation medicament and the medicament |
| CN110293126A (en) * | 2019-05-27 | 2019-10-01 | 上海傲江生态环境科技有限公司 | One kind is for arsenic and antimony pollution soil remediation medicament and its application method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115931914A (en) * | 2022-11-15 | 2023-04-07 | 东南大学 | Microwave probe, test system and method for testing uniformity of mixing of polluted soil |
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Application publication date: 20220211 |