CN105921505A - Method for remedying Cd-As-Cu heavy metal polluted soil - Google Patents
Method for remedying Cd-As-Cu heavy metal polluted 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
- B09C1/00—Reclamation of contaminated soil
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Abstract
The invention provides a method for remedying Cd-As-Cu heavy metal polluted soil. The method comprises the following steps: step 1, uniformly mixing hydrogen peroxide, oxysophocarpine, phosphoric acid, citric acid, palmitic acid, Tween 80 and deionized water to obtain a solution M, uniformly mixing bismuth phosphate, sodium sulfite, ferrous oxide, hydroxypropyl methyl cellulose and deionized water to obtain a solution N, and uniformly mixing bromelain, amylase, glucono-delta-lactone and deionized water to obtain a solution K; step 2, pulverizing the polluted soil, and performing cyclic leaching on the pulverized polluted soil by adopting the solution M; step 3, adding the solution N into the leached soil for uniform mixing; step 4, adding the solution K for uniform mixing and step 5, adding calcium molybdate, calcium oxalate, silkworm shell powder, chicken manure and fly ash for uniform mixing, and performing conservation. According to the method provided by the invention, the remedying effect on the Cd-As-Cu heavy metal polluted soil and the market prospect are good.
Description
Technical field
The invention belongs to technical field of soil remediation, be specifically related to a kind of method repairing cadmium arsenical copper heavy-metal contaminated soil.
Background technology
Soil is one of fundamental of human environment, is mankind's material bases of depending on for existence, live and producing.Soil pollution refers to that the harmful substance discharged in human being's production and life activity enters in soil, endangers the phenomenon of human and livestock health directly or indirectly.
Heavy metal pollution of soil also has become as one of serious problem of environmental pollution.In environmental pollution field, generally heavy metal is defined as metallic element or the metalloid element having overt toxicity to biology, such as lead, zinc, copper, cadmium, arsenic, hydrargyrum, chromium, nickel etc..These heavy metals can enter human body by food chain, accumulation in human body and do not decompose, once heavy metal precipitates excess in human body, can cause the headache of people, dizziness, insomnia, forgetful, arthralgia, even teratogenesis, carcinogenic etc..Wherein, cadmium is that environment toxic is the strongest and one of the contaminated most common heavy metal in farmland, China by cadmium pollution cultivated area extensively, relate to region, province many, cause contaminated grain many, drastically influence the healthy diet of people.Arsenic is also one of pollutant most common, that harm residents ' health is the most serious.The wide material sources that arsenic pollutes, including exploitation and smelting, plant chimney stalk waste residue, pesticide and burning of coal etc..The toxicity of elemental arsenic is extremely low, and arsenide is the most toxic, and trivalent arsenide compound is more higher than other arsenic compound toxicity, human body is produced toxic action arsenic simultaneously through food intake human body, irritant to human body skin, mucosa, it is also possible to cancer, the health of the serious threat mankind can be induced.Copper is growth and development of plants and the indispensable micronutrient element of health, but in soil, the copper of excess can affect the normal growth metabolism of plant, endangers plant and to the absorption of nutrient and reduces its yield.Additionally, the copper in soil is very strong to biological toxicity, if being enriched substantial amounts of copper in human body, can endanger the organs such as the liver in the person, gallbladder, the most also can stimulate human body mucosa and central nervous system, even cause metabolism and endocrine regulation, harm is big.
The repair function about the recovery technique of heavy-metal contaminated soil of prior art is single, and to cadmium, arsenic, copper polluted soil repairing effect diversity big and repairing effect needs to be improved further, therefore, it is necessary to provide a kind of to cadmium, arsenic, the most effective and respond well restorative procedure of reparation of copper polluted soil.
Summary of the invention
The technical problem to be solved is to overcome shortcoming present in prior art, it is provided that a kind of method repairing cadmium arsenical copper heavy-metal contaminated soil.
In order to solve above-mentioned technical problem, the present invention provides techniques below scheme:
A kind of method repairing cadmium arsenical copper heavy-metal contaminated soil, comprises the steps:
Step 1: by weight, by hydrogen peroxide 8-18 part, N-oxysophocarpine 5-12 part, phosphoric acid 2-7 part, citric acid 4-10 part, Palmic acid 6-13 part, Tween 80 3-7 part, deionized water 80-120 part mix homogeneously, obtains solution M；By Bismugel (Biothrax). 8-14 part, sodium sulfite 6-10 part, ferrous oxide 5-11 part, hydroxypropyl methyl cellulose 2-8 part, deionized water 75-90 part mix homogeneously, obtain solution N；By spinach bromelain 2-5 part, amylase 4-9 part, glucono-δ-lactone 3-7 part, deionized water 65-80 part mix homogeneously, obtain solution K；
Step 2: by contaminated soil hack, the temperature controlling contaminated soil is 60-80 DEG C, is incubated 1-2 hour, then takes solution M by 0.3-0.6L/kg and contaminated soil is circulated 3-5 drip washing 10-30min, collect the soil after leacheate and drip washing；
Step 3: take in the soil after the drip washing that Solutions Solution N joins in step 2 by 0.1-0.4L/kg, mix and blend 15-30 minute, stand 1-3 hour；
Step 4: take in the soil after the drip washing that Solutions Solution K joins in step 3 by 0.05-0.1L/kg, mix and blend 15-30 minute, stand 2-5 hour；
Step 5: being eventually adding gross weight is the calcium molybdate of 20-60g/kg soil, calcium oxalate, Periostachum bombycis powder, chicken manure and flyash, mix homogeneously, maintenance 20-30 days obtains the soil after reparation.
The above-mentioned method repairing cadmium arsenical copper heavy-metal contaminated soil, described solution M is prepared by the component of following weight portion: hydrogen peroxide 13 parts, N-oxysophocarpine 9 parts, phosphoric acid 5 parts, citric acid 7 parts, Palmic acid 12 parts, Tween 80 4 parts, deionized water 95 parts.
The above-mentioned method repairing cadmium arsenical copper heavy-metal contaminated soil, described solution N is prepared by the component of following weight portion: Bismugel (Biothrax). 11 parts, sodium sulfite 8 parts, ferrous oxide 7 parts, hydroxypropyl methyl cellulose 5 parts, deionized water 86 parts.
The above-mentioned method repairing cadmium arsenical copper heavy-metal contaminated soil, described solution K is prepared by the component of following weight portion: bromelain 3.5 parts, amylase 6.8 parts, glucono-δ-lactone 4.2 parts, deionized water 78 parts.
The above-mentioned method repairing cadmium arsenical copper heavy-metal contaminated soil, in step 2, the temperature controlling contaminated soil is 74 DEG C, is incubated 1.5 hours.
The above-mentioned method repairing cadmium arsenical copper heavy-metal contaminated soil, in step 2, takes solution M by 0.5L/kg and contaminated soil is circulated 5 drip washing 22min.
The above-mentioned method repairing cadmium arsenical copper heavy-metal contaminated soil, in step 3, takes in the soil after the drip washing that Solutions Solution N joins in step 2 by 0.27L/kg, and mix and blend 25 minutes stands 3 hours.
The above-mentioned method repairing cadmium arsenical copper heavy-metal contaminated soil, in step 4, takes in the soil after the drip washing that Solutions Solution K joins in step 3 by 0.08L/kg, and mix and blend 30 minutes stands 4 hours.
The above-mentioned method repairing cadmium arsenical copper heavy-metal contaminated soil, in steps of 5, the gross weight of described calcium molybdate, calcium oxalate, Periostachum bombycis powder, chicken manure and flyash is 43g/kg soil, and the weight ratio of calcium molybdate, calcium oxalate, Periostachum bombycis powder, chicken manure and flyash is 2.4:1.5:2:1.6:3.8.
Beneficial effects of the present invention:
The restorative procedure that the present invention provides is good to the repairing effect of cadmium arsenical copper heavy-metal contaminated soil, and after reparation, the content of Cadmium in Soil is by 184.5
Mg/kg is down to 20.6-22.8 mg/kg, and the content of arsenic is down to 19.7-21.3 by 231.7 mg/kg
Mg/kg, the content of copper is down to 10.6-12.7 by 152.8
Mg/kg, after reparation, the heavy metal concentration of soil meets the requirement of country's second grade soil quality standard.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is described in further detail.Following example are used for illustrating the present invention, but are not limited to the scope of the present invention.
Embodiment 1
A kind of method repairing cadmium arsenical copper heavy-metal contaminated soil, comprises the steps:
Step 1: by weight, by hydrogen peroxide 8 parts, N-oxysophocarpine 5 parts, phosphoric acid 2 parts, citric acid 4 parts, Palmic acid 6 parts, Tween 80 3 parts, 80 parts of mix homogeneously of deionized water, obtains solution M；By Bismugel (Biothrax). 8 parts, sodium sulfite 6 parts, ferrous oxide 5 parts, hydroxypropyl methyl cellulose 2 parts, 75 parts of mix homogeneously of deionized water, obtain solution N；By spinach bromelain 2 parts, amylase 4 parts, glucono-δ-lactone 3 parts, 65 parts of mix homogeneously of deionized water, obtain solution K；
Step 2: by contaminated soil hack, the temperature controlling contaminated soil is 60 DEG C, is incubated 1 hour, then takes solution M by 0.3L/kg and contaminated soil is circulated 3 drip washing 10min, collect the soil after leacheate and drip washing；
Step 3: take in the soil after the drip washing that Solutions Solution N joins in step 2 by 0.1L/kg, mix and blend 15 minutes, stand 1 hour；
Step 4: take in the soil after the drip washing that Solutions Solution K joins in step 3 by 0.05L/kg, mix and blend 15 minutes, stand 2 hours；
Step 5: being eventually adding the weight ratio that gross weight is 20g/kg soil is the calcium molybdate of 2.4:1.5:2:1.6:3.8, calcium oxalate, Periostachum bombycis powder, chicken manure and flyash, mix homogeneously, maintenance 20 days obtains the soil after reparation.
Embodiment 2
A kind of method repairing cadmium arsenical copper heavy-metal contaminated soil, comprises the steps:
Step 1: by weight, by hydrogen peroxide 18 parts, N-oxysophocarpine 12 parts, phosphoric acid 7 parts, citric acid 10 parts, Palmic acid 13 parts, Tween 80 7 parts, 120 parts of mix homogeneously of deionized water, obtains solution M；By Bismugel (Biothrax). 14 parts, sodium sulfite 10 parts, ferrous oxide 11 parts, hydroxypropyl methyl cellulose 8 parts, 90 parts of mix homogeneously of deionized water, obtain solution N；By spinach bromelain 5 parts, amylase 9 parts, glucono-δ-lactone 7 parts, 80 parts of mix homogeneously of deionized water, obtain solution K；
Step 2: by contaminated soil hack, the temperature controlling contaminated soil is 80 DEG C, is incubated 2 hours, then takes solution M by 0.6L/kg and contaminated soil is circulated 5 drip washing 30min, collect the soil after leacheate and drip washing；
Step 3: take in the soil after the drip washing that Solutions Solution N joins in step 2 by 0.4L/kg, mix and blend 30 minutes, stand 3 hours；
Step 4: take in the soil after the drip washing that Solutions Solution K joins in step 3 by 0.1L/kg, mix and blend 30 minutes, stand 5 hours；
Step 5: being eventually adding the weight ratio that gross weight is 60g/kg soil is the calcium molybdate of 2.4:1.5:2:1.6:3.8, calcium oxalate, Periostachum bombycis powder, chicken manure and flyash, mix homogeneously, maintenance 30 days obtains the soil after reparation.
Embodiment 3
A kind of method repairing cadmium arsenical copper heavy-metal contaminated soil, comprises the steps:
Step 1: by weight, by hydrogen peroxide 13 parts, N-oxysophocarpine 8 parts, phosphatase 24 part, citric acid 7 parts, Palmic acid 10 parts, Tween 80 5 parts, 100 parts of mix homogeneously of deionized water, obtains solution M；By Bismugel (Biothrax). 11 parts, sodium sulfite 8 parts, ferrous oxide 8 parts, hydroxypropyl methyl cellulose 5 parts, 82 parts of mix homogeneously of deionized water, obtain solution N；By spinach bromelain 3.5 parts, amylase 6.5 parts, glucono-δ-lactone 5 parts, 72 parts of mix homogeneously of deionized water, obtain solution K；
Step 2: by contaminated soil hack, the temperature controlling contaminated soil is 70 DEG C, is incubated 1.5 hours, then takes solution M by 0.45L/kg and contaminated soil is circulated 4 drip washing 20min, collect the soil after leacheate and drip washing；
Step 3: take in the soil after the drip washing that Solutions Solution N joins in step 2 by 0.25L/kg, mix and blend 22 minutes, stand 2 hours；
Step 4: take in the soil after the drip washing that Solutions Solution K joins in step 3 by 0.075L/kg, mix and blend 22 minutes, stand 3.5 hours；
Step 5: being eventually adding the weight ratio that gross weight is 40g/kg soil is the calcium molybdate of 2.4:1.5:2:1.6:3.8, calcium oxalate, Periostachum bombycis powder, chicken manure and flyash, mix homogeneously, maintenance 25 days obtains the soil after reparation.
Embodiment 4
A kind of method repairing cadmium arsenical copper heavy-metal contaminated soil, comprises the steps:
Step 1: by weight, by hydrogen peroxide 13 parts, N-oxysophocarpine 9 parts, phosphoric acid 5 parts, citric acid 7 parts, Palmic acid 12 parts, Tween 80 4 parts, 95 parts of mix homogeneously of deionized water, obtains solution M；By Bismugel (Biothrax). 11 parts, sodium sulfite 8 parts, ferrous oxide 7 parts, hydroxypropyl methyl cellulose 5 parts, 86 parts of mix homogeneously of deionized water, obtain solution N；By bromelain 3.5 parts, amylase 6.8 parts, glucono-δ-lactone 4.2 parts, 78 parts of mix homogeneously of deionized water, obtain solution K；
Step 2: by contaminated soil hack, the temperature controlling contaminated soil is 74 DEG C, is incubated 1.5 hours, then takes solution M by 0.5L/kg and contaminated soil is circulated 5 drip washing 22min, collect the soil after leacheate and drip washing；
Step 3: take in the soil after the drip washing that Solutions Solution N joins in step 2 by 0.27L/kg, mix and blend 25 minutes, stand 3 hours；
Step 4: take in the soil after the drip washing that Solutions Solution K joins in step 3 by 0.08L/kg, mix and blend 30 minutes, stand 4 hours；
Step 5: being eventually adding the weight ratio that gross weight is 43g/kg soil is the calcium molybdate of 2.4:1.5:2:1.6:3.8, calcium oxalate, Periostachum bombycis powder, chicken manure and flyash, mix homogeneously, maintenance 28 days obtains the soil after reparation.
Embodiment 5
A kind of method repairing cadmium arsenical copper heavy-metal contaminated soil, comprises the steps:
Step 1: by weight, by hydrogen peroxide 12 parts, N-oxysophocarpine 9 parts, phosphoric acid 5 parts, citric acid 6 parts, Palmic acid 8 parts, Tween 80 5 parts, 110 parts of mix homogeneously of deionized water, obtains solution M；By Bismugel (Biothrax). 12 parts, sodium sulfite 8 parts, ferrous oxide 7 parts, hydroxypropyl methyl cellulose 6 parts, 83 parts of mix homogeneously of deionized water, obtain solution N；By spinach bromelain 3 parts, amylase 6 parts, glucono-δ-lactone 5 parts, 73 parts of mix homogeneously of deionized water, obtain solution K；
Step 2: by contaminated soil hack, the temperature controlling contaminated soil is 72 DEG C, is incubated 2 hours, then takes solution M by 0.5L/kg and contaminated soil is circulated 3-5 drip washing 18min, collect the soil after leacheate and drip washing；
Step 3: take in the soil after the drip washing that Solutions Solution N joins in step 2 by 0.2L/kg, mix and blend 26 minutes, stand 2 hours；
Step 4: take in the soil after the drip washing that Solutions Solution K joins in step 3 by 0.08L/kg, mix and blend 24 minutes, stand 4 hours；
Step 5: being eventually adding the weight ratio that gross weight is 50g/kg soil is the calcium molybdate of 2.4:1.5:2:1.6:3.8, calcium oxalate, Periostachum bombycis powder, chicken manure and flyash, mix homogeneously, maintenance 25 days obtains the soil after reparation.
Comparative example 1
This comparative example is same as in Example 1, is in place of difference: without N-oxysophocarpine, spinach bromelain and Bismugel (Biothrax)..
Comparative example 2
This comparative example is same as in Example 1, is in place of difference: without Palmic acid, sodium sulfite and glucono-δ-lactone.
Performance test
Cadmium arsenical copper heavy-metal contaminated soil is repaired by the method using above-described embodiment and comparative example, and after reparation, the content of beary metal test result of soil is as shown in the table:
As can be seen from the above table, the restorative procedure that the present invention provides is good to the repairing effect of cadmium arsenical copper heavy-metal contaminated soil, and after reparation, the content of Cadmium in Soil is by 184.5
Mg/kg is down to 20.6-22.8 mg/kg, and the content of arsenic is down to 19.7-21.3 by 231.7 mg/kg
Mg/kg, the content of copper is down to 10.6-12.7 by 152.8
Mg/kg, after reparation, the heavy metal concentration of soil meets the requirement of country's second grade soil quality standard.
Claims (9)
1. the method repairing cadmium arsenical copper heavy-metal contaminated soil, it is characterised in that comprise the steps:
Step 1: by weight, by hydrogen peroxide 8-18 part, N-oxysophocarpine 5-12 part, phosphoric acid 2-7 part, citric acid 4-10 part, Palmic acid 6-13 part, Tween 80 3-7 part, deionized water 80-120 part mix homogeneously, obtains solution M；By Bismugel (Biothrax). 8-14 part, sodium sulfite 6-10 part, ferrous oxide 5-11 part, hydroxypropyl methyl cellulose 2-8 part, deionized water 75-90 part mix homogeneously, obtain solution N；By spinach bromelain 2-5 part, amylase 4-9 part, glucono-δ-lactone 3-7 part, deionized water 65-80 part mix homogeneously, obtain solution K；
Step 2: by contaminated soil hack, the temperature controlling contaminated soil is 60-80 DEG C, is incubated 1-2 hour, then takes solution M by 0.3-0.6L/kg and contaminated soil is circulated 3-5 drip washing 10-30min, collect the soil after leacheate and drip washing；
Step 3: take in the soil after the drip washing that Solutions Solution N joins in step 2 by 0.1-0.4L/kg, mix and blend 15-30 minute, stand 1-3 hour；
Step 4: take in the soil after the drip washing that Solutions Solution K joins in step 3 by 0.05-0.1L/kg, mix and blend 15-30 minute, stand 2-5 hour；
Step 5: being eventually adding gross weight is the calcium molybdate of 20-60g/kg soil, calcium oxalate, Periostachum bombycis powder, chicken manure and flyash, mix homogeneously, maintenance 20-30 days obtains the soil after reparation.
The method of reparation cadmium arsenical copper heavy-metal contaminated soil the most according to claim 1, it is characterized in that, described solution M is prepared by the component of following weight portion: hydrogen peroxide 13 parts, N-oxysophocarpine 9 parts, phosphoric acid 5 parts, citric acid 7 parts, Palmic acid 12 parts, Tween 80 4 parts, deionized water 95 parts.
The method of reparation cadmium arsenical copper heavy-metal contaminated soil the most according to claim 1, it is characterized in that, described solution N is prepared by the component of following weight portion: Bismugel (Biothrax). 11 parts, sodium sulfite 8 parts, ferrous oxide 7 parts, hydroxypropyl methyl cellulose 5 parts, deionized water 86 parts.
The method of reparation cadmium arsenical copper heavy-metal contaminated soil the most according to claim 1, it is characterized in that, described solution K is prepared by the component of following weight portion: bromelain 3.5 parts, amylase 6.8 parts, glucono-δ-lactone 4.2 parts, deionized water 78 parts.
The method of reparation cadmium arsenical copper heavy-metal contaminated soil the most according to claim 1, it is characterised in that in step 2, the temperature controlling contaminated soil is 74 DEG C, is incubated 1.5 hours.
The method of reparation cadmium arsenical copper heavy-metal contaminated soil the most according to claim 1, it is characterised in that in step 2, takes solution M by 0.5L/kg and contaminated soil is circulated 5 drip washing 22min.
The method of reparation cadmium arsenical copper heavy-metal contaminated soil the most according to claim 1, it is characterised in that in step 3, takes in the soil after the drip washing that Solutions Solution N joins in step 2 by 0.27L/kg, and mix and blend 25 minutes stands 3 hours.
The method of reparation cadmium arsenical copper heavy-metal contaminated soil the most according to claim 1, it is characterised in that in step 4, takes in the soil after the drip washing that Solutions Solution K joins in step 3 by 0.08L/kg, and mix and blend 30 minutes stands 4 hours.
The method of reparation cadmium arsenical copper heavy-metal contaminated soil the most according to claim 1, it is characterized in that, in steps of 5, the gross weight of described calcium molybdate, calcium oxalate, Periostachum bombycis powder, chicken manure and flyash is 43g/kg soil, and the weight ratio of calcium molybdate, calcium oxalate, Periostachum bombycis powder, chicken manure and flyash is 2.4:1.5:2:1.6:3.8.
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| CN109590323A (en) * | 2018-12-19 | 2019-04-09 | 河南科技大学 | A method of strengthening remediating heavy metal combined contamination soil |
| CN114231291A (en) * | 2021-11-11 | 2022-03-25 | 江西省生态环境科学研究与规划院 | In-situ remediation medicament and method for remedying 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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