CN105921505B - A method of repairing cadmium arsenical copper heavy-metal contaminated soil - Google Patents
A method of repairing cadmium arsenical copper heavy-metal contaminated soil Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
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Abstract
The present invention provides a kind of methods for repairing cadmium arsenical copper heavy-metal contaminated soil, comprising steps of step 1: hydrogen peroxide, N-Oxysophocarpine, phosphoric acid, citric acid, palmitinic acid, Tween 80, deionized water being mixed, solution M is obtained；Bismuth phosphate, sodium sulfite, ferrous oxide, hydroxypropyl methyl cellulose, deionized water are mixed, solution N is obtained；Spinach bromelain, amylase, glucono-δ-lactone, deionized water are mixed, solution K is obtained；Step 2: by contaminated soil hack, solution M being taken to carry out cycling elution to contaminated soil；Step 3: taking Solutions Solution N that the soil after elution is added, mix；Step 4: Solutions Solution K is added, mixes；Step 5: calcium molybdate, calcium oxalate, silkworm shell powder, chicken manure and flyash is added, mixes, conserves to obtain the final product.Restorative procedure provided by the invention is good to the repairing effect of cadmium arsenical copper heavy-metal contaminated soil, and market prospects are good.
Description
Technical field
The invention belongs to technical field of soil remediation, and in particular to a kind of side for repairing cadmium arsenical copper heavy-metal contaminated soil
Method.
Background technique
Soil is one of fundamental of human environment, is the material base that the mankind depend on for existence, live and produce.Soil
Pollution refers to that the harmful substance being discharged in human being's production and life activity enters in soil, and it is strong directly or indirectly to endanger people and animals
The phenomenon that health.
Heavy metal pollution of soil also has become one of serious problem of environmental pollution.In environmental pollution field, usually
Heavy metal is defined as to have the metallic element or metalloid element of overt toxicity to biology, as lead, zinc, copper, cadmium, arsenic, mercury,
Chromium, nickel etc..These heavy metals can enter human body by food chain, and accumulation is without decomposing in human body, once heavy metal exists
Precipitating is excessive in human body, can cause headache, dizziness, insomnia, amnesia, arthralgia or even the teratogenesis, carcinogenic etc. of people.Wherein,
Cadmium is that environment Poisoning is most strong and one of the contaminated most common heavy metal in farmland, wide by the cultivated area of cadmium pollution in China,
It is more to be related to province region, causes contaminated grain more, drastically influences the healthy diet of people.Arsenic is also most common, harm
One of the pollutant of residents ' health most serious.Arsenic pollution it is from a wealth of sources, including exploit and smelt, plant chimney stalk waste residue, pesticide
And burning of coal etc..The toxicity of elemental arsenic is extremely low, and arsenide is toxic, and trivalent arsenic compound is than other arsenic compounds poison
Property it is stronger, to human body generate toxic action simultaneously arsenic through food intake human body, it is irritant to human skin, mucous membrane, it is also possible to
Cancer can be induced, the health of the mankind is seriously threatened.Copper is plant growth and development and the indispensable micronutrient member of human health
Element, but excessive copper will affect the normal growth metabolism of plant in soil, endangers plant to the absorption of nutrient and reduces its yield.
In addition, copper in soil is very strong to the toxicity of biology, if being enriched a large amount of copper in human body, can endanger the intracorporal liver of the person,
The organs such as gallbladder, while human body mucous membrane and central nervous system can be also stimulated, or even cause metabolism and endocrine disturbance, harm
Greatly.
The repair function of the recovery technique about heavy-metal contaminated soil of the prior art is single, and to cadmium, arsenic, Cu-W ore deposit
The repairing effect otherness of soil is big and repairing effect needs to be further increased, therefore, it is necessary to provide a kind of pair of cadmium, arsenic, copper
Contaminated soil repairs restorative procedure that is effective simultaneously and working well.
Summary of the invention
The technical problem to be solved by the present invention is to overcome disadvantage existing in the prior art, a kind of reparation cadmium arsenical copper is provided
The method of heavy-metal contaminated soil.
In order to solve the above technical problem, the present invention provides following technical schemes:
A method of cadmium arsenical copper heavy-metal contaminated soil is repaired, is included the following steps:
Step 1: by weight, by 8-18 parts of hydrogen peroxide, 5-12 parts of N-Oxysophocarpine, 2-7 parts of phosphoric acid, citric acid 4-10
Part, 6-13 parts of palmitinic acid, 3-7 parts of Tween 80,80-120 parts of deionized water be uniformly mixed, obtain solution M；By bismuth phosphate 8-14
Part, 6-10 parts of sodium sulfite, 5-11 parts of ferrous oxide, 2-8 parts of hydroxypropyl methyl cellulose, 75-90 parts of deionized water mixing are equal
It is even, obtain solution N；By 2-5 parts of spinach bromelain, 4-9 parts of amylase, 3-7 parts of glucono-δ-lactone, deionized water 65-
80 parts are uniformly mixed, and obtain solution K；
Step 2: by contaminated soil hack, the temperature for controlling contaminated soil is 60-80 DEG C, keeps the temperature 1-2 hours, then presses
0.3-0.6L/kg takes solution M to carry out 3-5 elution 10-30min of circulation to contaminated soil, the soil after collecting leacheate and elution
Earth；
Step 3: in the soil after taking Solutions Solution N to be added to the elution in step 2 by 0.1-0.4L/kg, being mixed
15-30 minutes, stand 1-3 hours；
Step 4: in the soil after taking Solutions Solution K to be added to the elution in step 3 by 0.05-0.1L/kg, being mixed
15-30 minutes, stand 2-5 hours；
Step 5: being eventually adding calcium molybdate, calcium oxalate, silkworm shell powder, chicken manure and the fine coal that total weight is 20-60g/kg soil
Ash is uniformly mixed, and conserves 20-30 days to get the soil after reparation.
The method of above-mentioned reparation cadmium arsenical copper heavy-metal contaminated soil, the solution M are prepared by the component of following parts by weight
And obtain: 13 parts of hydrogen peroxide, 9 parts of N-Oxysophocarpine, 5 parts of phosphoric acid, 7 parts of citric acid, 12 parts of palmitinic acid, 4 parts of Tween 80, deionization
95 parts of water.
The method of above-mentioned reparation cadmium arsenical copper heavy-metal contaminated soil, the solution N are prepared by the component of following parts by weight
And obtain: 11 parts of bismuth phosphate, 8 parts of sodium sulfite, 7 parts of ferrous oxide, 5 parts of hydroxypropyl methyl cellulose, 86 parts of deionized water.
The method of above-mentioned reparation cadmium arsenical copper heavy-metal contaminated soil, the solution K are prepared by the component of following parts by weight
And obtain: 3.5 parts of bromelain, 6.8 parts of amylase, 4.2 parts of glucono-δ-lactone, 78 parts of deionized water.
The method of above-mentioned reparation cadmium arsenical copper heavy-metal contaminated soil, in step 2, the temperature for controlling contaminated soil is 74
DEG C, keep the temperature 1.5 hours.
The method of above-mentioned reparation cadmium arsenical copper heavy-metal contaminated soil takes solution M to pollution by 0.5L/kg in step 2
Soil carries out 5 elution 22min of circulation.
The method of above-mentioned reparation cadmium arsenical copper heavy-metal contaminated soil takes Solutions Solution N by 0.27L/kg in step 3
It in soil after being added to the elution in step 2, is mixed 25 minutes, stands 3 hours.
The method of above-mentioned reparation cadmium arsenical copper heavy-metal contaminated soil takes Solutions Solution K by 0.08L/kg in step 4
It in soil after being added to the elution in step 3, is mixed 30 minutes, stands 4 hours.
The method of above-mentioned reparation cadmium arsenical copper heavy-metal contaminated soil, in steps of 5, the calcium molybdate, calcium oxalate, silkworm shell
The total weight of powder, chicken manure and flyash is 43g/kg soil, and the weight of calcium molybdate, calcium oxalate, silkworm shell powder, chicken manure and flyash
Than for 2.4:1.5:2:1.6:3.8.
Beneficial effects of the present invention:
Restorative procedure provided by the invention is good to the repairing effect of cadmium arsenical copper heavy-metal contaminated soil, after reparation in soil
The content of cadmium is down to 20.6-22.8 mg/kg by 184.5 mg/kg, and the content of arsenic is down to 19.7-21.3 by 231.7 mg/kg
The content of mg/kg, copper are down to 10.6-12.7 mg/kg by 152.8, and the heavy metal concentration of soil meets national second level soil after reparation
The requirement of earth quality standard.
Specific embodiment
Combined with specific embodiments below, present invention is further described in detail.The following examples are intended to illustrate the invention,
But it is not intended to limit the scope of the invention.
Embodiment 1
A method of cadmium arsenical copper heavy-metal contaminated soil is repaired, is included the following steps:
Step 1: by weight, by 8 parts of hydrogen peroxide, 5 parts of N-Oxysophocarpine, 2 parts of phosphoric acid, 4 parts of citric acid, 6 parts of palmitinic acid,
3 parts of Tween 80,80 parts of deionized water be uniformly mixed, obtain solution M；By 8 parts of bismuth phosphate, 6 parts of sodium sulfite, ferrous oxide 5
Part, 2 parts of hydroxypropyl methyl cellulose, 75 parts of deionized water be uniformly mixed, obtain solution N；By 2 parts of spinach bromelain, starch
4 parts of enzyme, 3 parts of glucono-δ-lactone, 65 parts of deionized water be uniformly mixed, obtain solution K；
Step 2: by contaminated soil hack, the temperature for controlling contaminated soil is 60 DEG C, keeps the temperature 1 hour, then presses 0.3L/kg
Solution M is taken to carry out 3 elution 10min of circulation to contaminated soil, the soil after collecting leacheate and elution；
Step 3: in the soil after taking Solutions Solution N to be added to the elution in step 2 by 0.1L/kg, being mixed 15 points
Clock stands 1 hour；
Step 4: in the soil after taking Solutions Solution K to be added to the elution in step 3 by 0.05L/kg, being mixed 15 points
Clock stands 2 hours；
Step 5: be eventually adding calcium molybdate that the weight ratio that total weight is 20g/kg soil is 2.4:1.5:2:1.6:3.8,
Calcium oxalate, silkworm shell powder, chicken manure and flyash are uniformly mixed, and conserve 20 days to get the soil after reparation.
Embodiment 2
A method of cadmium arsenical copper heavy-metal contaminated soil is repaired, is included the following steps:
Step 1: by weight, by 18 parts of hydrogen peroxide, 12 parts of N-Oxysophocarpine, 7 parts of phosphoric acid, 10 parts of citric acid, palmitinic acid
13 parts, 7 parts of Tween 80,120 parts of deionized water be uniformly mixed, obtain solution M；By 14 parts of bismuth phosphate, 10 parts of sodium sulfite, oxygen
Change ferrous 11 parts, 8 parts of hydroxypropyl methyl cellulose, 90 parts of deionized water be uniformly mixed, obtain solution N；By spinach bromelain 5
Part, 9 parts of amylase, 7 parts of glucono-δ-lactone, 80 parts of deionized water be uniformly mixed, obtain solution K；
Step 2: by contaminated soil hack, the temperature for controlling contaminated soil is 80 DEG C, keeps the temperature 2 hours, then presses 0.6L/kg
Solution M is taken to carry out 5 elution 30min of circulation to contaminated soil, the soil after collecting leacheate and elution；
Step 3: in the soil after taking Solutions Solution N to be added to the elution in step 2 by 0.4L/kg, being mixed 30 points
Clock stands 3 hours；
Step 4: in the soil after taking Solutions Solution K to be added to the elution in step 3 by 0.1L/kg, being mixed 30 points
Clock stands 5 hours；
Step 5: be eventually adding calcium molybdate that the weight ratio that total weight is 60g/kg soil is 2.4:1.5:2:1.6:3.8,
Calcium oxalate, silkworm shell powder, chicken manure and flyash are uniformly mixed, and conserve 30 days to get the soil after reparation.
Embodiment 3
A method of cadmium arsenical copper heavy-metal contaminated soil is repaired, is included the following steps:
Step 1: by weight, by 13 parts of hydrogen peroxide, 8 parts of N-Oxysophocarpine, phosphatase 24 part, 7 parts of citric acid, palmitinic acid 10
Part, 5 parts of Tween 80,100 parts of deionized water be uniformly mixed, obtain solution M；11 parts of bismuth phosphate, 8 parts of sodium sulfite, oxidation is sub-
8 parts of iron, 5 parts of hydroxypropyl methyl cellulose, 82 parts of deionized water be uniformly mixed, obtain solution N；By 3.5 parts of spinach bromelain,
6.5 parts of amylase, 5 parts of glucono-δ-lactone, 72 parts of deionized water be uniformly mixed, obtain solution K；
Step 2: by contaminated soil hack, the temperature for controlling contaminated soil is 70 DEG C, keeps the temperature 1.5 hours, then presses
0.45L/kg takes solution M to carry out 4 elution 20min of circulation to contaminated soil, the soil after collecting leacheate and elution；
Step 3: in the soil after taking Solutions Solution N to be added to the elution in step 2 by 0.25L/kg, being mixed 22 points
Clock stands 2 hours；
Step 4: in the soil after taking Solutions Solution K to be added to the elution in step 3 by 0.075L/kg, being mixed 22
Minute, stand 3.5 hours；
Step 5: be eventually adding calcium molybdate that the weight ratio that total weight is 40g/kg soil is 2.4:1.5:2:1.6:3.8,
Calcium oxalate, silkworm shell powder, chicken manure and flyash are uniformly mixed, and conserve 25 days to get the soil after reparation.
Embodiment 4
A method of cadmium arsenical copper heavy-metal contaminated soil is repaired, is included the following steps:
Step 1: by weight, by 13 parts of hydrogen peroxide, 9 parts of N-Oxysophocarpine, 5 parts of phosphoric acid, 7 parts of citric acid, palmitinic acid 12
Part, 4 parts of Tween 80,95 parts of deionized water be uniformly mixed, obtain solution M；11 parts of bismuth phosphate, 8 parts of sodium sulfite, oxidation is sub-
7 parts of iron, 5 parts of hydroxypropyl methyl cellulose, 86 parts of deionized water be uniformly mixed, obtain solution N；By 3.5 parts of bromelain, form sediment
6.8 parts of powder enzyme, 4.2 parts of glucono-δ-lactone, 78 parts of deionized water be uniformly mixed, obtain solution K；
Step 2: by contaminated soil hack, the temperature for controlling contaminated soil is 74 DEG C, keeps the temperature 1.5 hours, then presses 0.5L/
Kg takes solution M to carry out 5 elution 22min of circulation to contaminated soil, the soil after collecting leacheate and elution；
Step 3: in the soil after taking Solutions Solution N to be added to the elution in step 2 by 0.27L/kg, being mixed 25 points
Clock stands 3 hours；
Step 4: in the soil after taking Solutions Solution K to be added to the elution in step 3 by 0.08L/kg, being mixed 30 points
Clock stands 4 hours；
Step 5: be eventually adding calcium molybdate that the weight ratio that total weight is 43g/kg soil is 2.4:1.5:2:1.6:3.8,
Calcium oxalate, silkworm shell powder, chicken manure and flyash are uniformly mixed, and conserve 28 days to get the soil after reparation.
Embodiment 5
A method of cadmium arsenical copper heavy-metal contaminated soil is repaired, is included the following steps:
Step 1: by weight, by 12 parts of hydrogen peroxide, 9 parts of N-Oxysophocarpine, 5 parts of phosphoric acid, 6 parts of citric acid, palmitinic acid 8
Part, 5 parts of Tween 80,110 parts of deionized water be uniformly mixed, obtain solution M；12 parts of bismuth phosphate, 8 parts of sodium sulfite, oxidation is sub-
7 parts of iron, 6 parts of hydroxypropyl methyl cellulose, 83 parts of deionized water be uniformly mixed, obtain solution N；By 3 parts of spinach bromelain, form sediment
6 parts of powder enzyme, 5 parts of glucono-δ-lactone, 73 parts of deionized water be uniformly mixed, obtain solution K；
Step 2: by contaminated soil hack, the temperature for controlling contaminated soil is 72 DEG C, keeps the temperature 2 hours, then presses 0.5L/kg
Solution M is taken to carry out 3-5 elution 18min of circulation to contaminated soil, the soil after collecting leacheate and elution；
Step 3: in the soil after taking Solutions Solution N to be added to the elution in step 2 by 0.2L/kg, being mixed 26 points
Clock stands 2 hours；
Step 4: in the soil after taking Solutions Solution K to be added to the elution in step 3 by 0.08L/kg, being mixed 24 points
Clock stands 4 hours；
Step 5: be eventually adding calcium molybdate that the weight ratio that total weight is 50g/kg soil is 2.4:1.5:2:1.6:3.8,
Calcium oxalate, silkworm shell powder, chicken manure and flyash are uniformly mixed, and conserve 25 days to get the soil after reparation.
Comparative example 1
This comparative example is same as Example 1, and difference place is: without N-Oxysophocarpine, spinach bromelain and phosphoric acid
Bismuth.
Comparative example 2
This comparative example is same as Example 1, and difference place is: interior without palmitinic acid, sodium sulfite and gluconic acid-δ-
Ester.
Performance test
Cadmium arsenical copper heavy-metal contaminated soil is repaired using the method for above-described embodiment and comparative example, soil after reparation
Content of beary metal test result is as follows shown in table:
As can be seen from the above table, restorative procedure provided by the invention is good to the repairing effect of cadmium arsenical copper heavy-metal contaminated soil
Good, the content of cadmium by 184.5 mg/kg is down to 20.6-22.8 mg/kg in soil after reparation, and the content of arsenic is by 231.7 mg/kg
It is down to 19.7-21.3 mg/kg, the content of copper is down to 10.6-12.7 mg/kg by 152.8, the heavy metal concentration of soil after reparation
Meet the requirement of national second grade soil quality standard.
Claims (9)
1. a kind of method for repairing cadmium arsenical copper heavy-metal contaminated soil, which comprises the steps of: step 1: by weight
Part is measured, by 8-18 parts of hydrogen peroxide, 5-12 parts of N-Oxysophocarpine, 2-7 parts of phosphoric acid, 4-10 parts of citric acid, 6-13 parts of palmitinic acid, tween
80 3-7 parts, 80-120 parts of deionized water is uniformly mixed, and obtains solution M；By 8-14 parts of bismuth phosphate, 6-10 parts of sodium sulfite, oxygen
Change 5-11 parts of ferrous iron, 2-8 parts of hydroxypropyl methyl cellulose, 75-90 parts of deionized water it is uniformly mixed, obtain solution N；By pineapple egg
White enzyme 2-5 parts, 4-9 parts of amylase, 3-7 parts of glucono-δ-lactone, 65-80 parts of deionized water be uniformly mixed, obtain solution K；
Step 2: by contaminated soil hack, the temperature for controlling contaminated soil is 60-80 DEG C, keeps the temperature 1-2 hours, then presses 0.3-0.6L/
Kg takes solution M to carry out 3-5 elution 10-30min of circulation to contaminated soil, the soil after collecting leacheate and elution；Step
3: in the soil after taking solution N to be added to the elution in step 2 by 0.1-0.4L/kg, being mixed 15-30 minutes, stand 1-3
Hour；Step 4: in the soil after taking solution K to be added to the elution in step 3 by 0.05-0.1L/kg, 15-30 is mixed
Minute, stand 2-5 hours；Step 5: be eventually adding total weight be the calcium molybdate of 20-60g/kg soil, calcium oxalate, silkworm shell powder,
Chicken manure and flyash are uniformly mixed, and conserve 20-30 days to get the soil after reparation.
2. the method according to claim 1 for repairing cadmium arsenical copper heavy-metal contaminated soil, which is characterized in that the solution M
It is prepared by the component of following parts by weight: 13 parts of hydrogen peroxide, 9 parts of N-Oxysophocarpine, 5 parts of phosphoric acid, 7 parts of citric acid, palmitinic acid
12 parts, 4 parts of Tween 80,95 parts of deionized water.
3. the method according to claim 1 for repairing cadmium arsenical copper heavy-metal contaminated soil, which is characterized in that the solution N
It is prepared by the component of following parts by weight: 11 parts of bismuth phosphate, 8 parts of sodium sulfite, 7 parts of ferrous oxide, hydroxypropyl methyl fiber
5 parts, 86 parts of deionized water of element.
4. the method according to claim 1 for repairing cadmium arsenical copper heavy-metal contaminated soil, which is characterized in that the solution K
Be prepared by the component of following parts by weight: 3.5 parts of bromelain, 6.8 parts of amylase, 4.2 parts of glucono-δ-lactone,
78 parts of deionized water.
5. the method according to claim 1 for repairing cadmium arsenical copper heavy-metal contaminated soil, which is characterized in that in step 2,
The temperature for controlling contaminated soil is 74 DEG C, keeps the temperature 1.5 hours.
6. the method according to claim 1 for repairing cadmium arsenical copper heavy-metal contaminated soil, which is characterized in that in step 2,
Solution M is taken to carry out 5 elution 22min of circulation to contaminated soil by 0.5L/kg.
7. the method according to claim 1 for repairing cadmium arsenical copper heavy-metal contaminated soil, which is characterized in that in step 3,
It in soil after taking Solutions Solution N to be added to the elution in step 2 by 0.27L/kg, is mixed 25 minutes, stands 3 hours.
8. the method according to claim 1 for repairing cadmium arsenical copper heavy-metal contaminated soil, which is characterized in that in step 4,
It in soil after taking Solutions Solution K to be added to the elution in step 3 by 0.08L/kg, is mixed 30 minutes, stands 4 hours.
9. the method according to claim 1 for repairing cadmium arsenical copper heavy-metal contaminated soil, which is characterized in that in steps of 5,
The calcium molybdate, calcium oxalate, silkworm shell powder, chicken manure and flyash total weight be 43g/kg soil, and calcium molybdate, calcium oxalate, silkworm
The weight ratio of shell powder, chicken manure and flyash is 2.4:1.5:2:1.6:3.8.
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| CN106694532A (en) * | 2016-12-26 | 2017-05-24 | 湖南金旅环保股份有限公司 | Method for repairing cadmium-polluted farmland soil |
| CN109590323B (en) * | 2018-12-19 | 2021-06-08 | 河南科技大学 | Method for strengthening remediation of heavy metal combined contaminated soil |
| CN114231291B (en) * | 2021-11-11 | 2023-06-23 | 江西省生态环境科学研究与规划院 | In-situ remediation agent and method for remediating copper-pyrethroid pesticide composite contaminated soil |
| CN115415298A (en) * | 2022-09-29 | 2022-12-02 | 广西兰池环境工程有限公司 | Remediation method for arsenic heavy metal contaminated soil |
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