CN107695087A - A kind of method of restoration of the ecosystem heavy-metal contaminated soil - Google Patents

A kind of method of restoration of the ecosystem heavy-metal contaminated soil Download PDF

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Publication number
CN107695087A
CN107695087A CN201710996708.0A CN201710996708A CN107695087A CN 107695087 A CN107695087 A CN 107695087A CN 201710996708 A CN201710996708 A CN 201710996708A CN 107695087 A CN107695087 A CN 107695087A
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CN
China
Prior art keywords
water
soil
heavy metal
administered
pond
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201710996708.0A
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Chinese (zh)
Inventor
丁盼芸
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fuzhou Heyuan Environmental Protection Technology Co Ltd
Original Assignee
Fuzhou Heyuan Environmental Protection Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fuzhou Heyuan Environmental Protection Technology Co Ltd filed Critical Fuzhou Heyuan Environmental Protection Technology Co Ltd
Priority to CN201710996708.0A priority Critical patent/CN107695087A/en
Publication of CN107695087A publication Critical patent/CN107695087A/en
Pending legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B09DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09CRECLAMATION OF CONTAMINATED SOIL
    • B09C1/00Reclamation of contaminated soil
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B09DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09CRECLAMATION OF CONTAMINATED SOIL
    • B09C1/00Reclamation of contaminated soil
    • B09C1/08Reclamation of contaminated soil chemically
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B09DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09CRECLAMATION OF CONTAMINATED SOIL
    • B09C1/00Reclamation of contaminated soil
    • B09C1/10Reclamation of contaminated soil microbiologically, biologically or by using enzymes
    • B09C1/105Reclamation of contaminated soil microbiologically, biologically or by using enzymes using fungi or plants
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00Multistage treatment of water, waste water, or sewage
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/46Treatment of water, waste water, or sewage by electrochemical methods
    • C02F1/461Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
    • C02F1/463Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrocoagulation
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/66Treatment of water, waste water, or sewage by neutralisation; pH adjustment
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00Nature of the contaminant
    • C02F2101/10Inorganic compounds
    • C02F2101/20Heavy metals or heavy metal compounds
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00Biological treatment of water, waste water, or sewage
    • C02F3/32Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae

Abstract

The invention discloses a kind of method of restoration of the ecosystem heavy-metal contaminated soil, this method includes the first step, pending soil layer is shoveled out using bull-dozer;Second step, pending soil is submerged in water;3rd step, a part of heavy metal is first deposited using chemical agent;4th step, heavy metal is adsorbed using super enrichment water plant;5th step, plants the industrial crops for being worth part on the water of non-super enrichment, and the economy during lifting is administered is imitated preferably.The present invention administer thoroughly, can water and soil it is double control, do not rebound, can fundamentally improved soil heavy metal pollution situation.

Description

A kind of method of restoration of the ecosystem heavy-metal contaminated soil
Technical field
The present invention relates to restoration of the ecosystem field, more particularly to a kind of method of restoration of the ecosystem heavy-metal contaminated soil.
Background technology
It is heavy metal-polluted to have a finger in every pie the environmental pollution as caused by heavy metal or its compound.Mainly by mining, waste gas discharge, sewage Irrigate and using caused by the human factors such as heavy metals exceeding standard product.Heavy metal original meaning refers to that (density is more than metal of the proportion more than 5 4.5 grams of metals per cubic centimeter), including gold, silver, copper, iron, lead etc..Heavy metal pollution and the pollution of other organic compounds It is different.Many organic compounds can by nature physics itself, chemical or biological purification, make harmfulness reduce or Release.And heavy metal has enriching, it is difficult to degrade in the environment.China is due to the exploitation, smelting, processing in heavy metal at present During, cause many heavy metals such as lead, mercury, cadmium, cobalt etc. to cause serious environmental pollution into big gas and water, soil.Such as with useless The heavy metal of water discharge, even if concentration is small, can also be accumulated in algae and bed mud, be adsorbed by fish and shellfish body surface, produce food Chain concentrates, so as to cause public hazards.
Metal is favourable in water body or is harmful to species, the physicochemical property for depending not only on metal, but also depending on metal Concentration and existing valence state and form, violent toxicity is also had more than a certain numerical value even if beneficial metallic element concentration, is made Animals and plants are poisoned, or even dead.Metallo-organic compound (such as organic mercury, Organic leadP, organo-arsenic, organotin) is than corresponding gold It is much better than to belong to inorganic compound toxicity;The metal of soluble state is again bigger than the toxicity of particulate form metal;Cr VI compares trivalent chromium Toxicity wants big etc..In human body with protein and various enzymes strong interaction can occur for heavy metal, them is lost work Property, it is also possible to it is enriched with some organs of human body, if it exceeds the limit that human body is resistant to, during human body can be caused acute Poison, subacute poisoning, slow poisoning etc., people is known from experience and causes very big harm, for example, the minamata disease (mercury pollution) that Japan occurs All it is as caused by heavy metal pollution with the nuisance disease such as Itai-itai diseases (cadmium pollution).Heavy metal is in air, water body, soil, organism In it is widely distributed, and bed mud is often the repository and Final Destination of heavy metal.When environmental change, the heavy metal in bed mud Form will occur to convert and discharge to pollute.Heavy metal can not be biodegradable, but have bioaccumulation, can direct prestige Side of body higher organism includes the mankind, and relevant expert points out, pollution of the heavy metal to soil has irreversibility, polluted soil Value is not administered, varieties of plant can only be adjusted to be avoided.Therefore, Heavy Metal Pollution in Sediments problem is increasingly subject to people's Pay attention to.
In summary, in the market urgently it is a kind of administer thoroughly, can water and soil it is double control, do not rebound, can fundamentally improved soil Heavy metal pollution situation.
The content of the invention
For drawbacks described above present in prior art, the present invention is intended to provide it is a kind of administer thoroughly, can water and soil be double controls, no Bounce-back, can the fundamentally restoration of the ecosystem heavy-metal contaminated soil of improved soil heavy metal pollution situation method.
To achieve these goals, the present invention uses following technical scheme:A kind of restoration of the ecosystem heavy-metal contaminated soil Method, comprise the following steps:
1) pre-preparation
1. using bull-dozer and excavator, contaminated soil layer is excavated to 50cm-60cm depth;
2. pond is administered at the cement base bottom for preparing a deep 1.0m-1.2m, bottom of pond area is with once administering soil surface area Quite;
3. by step 1. in excavate soil layer push-in administer pond;
4. extracting the contaminated ground water in irrigation canals and ditches nearby, pour into and administer pond, 0.6m-0.8m is risen to height of water level;
5. soil to be administered of stirring, extremely it is well mixed with water;
2) chemical harnessing
1. it is respectively acid-base reagent from potassium hydroxide and hydrogen sulfide;
2. first putting into potassium hydroxide to water PH value 10-10.5, stirred simultaneously during input;
3. putting into hydrogen sulfide neutralization again, to pH value 6.5-7.5, stirred simultaneously during input;
4. applying electric flocculation method using heavy metal gel removes heavy metal precipitation thing, the chemical harnessing stage is completed;
3) three-dimensional super enrichment water body treating
1. with 4/m in water body3- 9/m3 density plants water spinach and canna respectively, and the water body close to edge is planted Canna, intermediate waters plantation water spinach;
2. brown alga is implanted into water body, 4/m of implant density3
3. planting card state duckweed, duckweed on the water surface, give free rein to grow;
4) above water economic plants is planted
1. after the 3) stage carries out -2 months January, seed covering space lotus 36;
2. 3) plant that the stage uses changes plant for every 3 months once, 1. space lotus 36 that step is planted is with 1 year for a phase;
5) soil treatment after administering
1. after term improvement terminates, the Winter Dry pool takes rhizoma nelumbinis, clears out pool bottom mud whereby, and these mud are to be administered Good soil.
Compared with the prior art, the present invention has advantages below as a result of such scheme:Had shown that, done according to research Heavy metal in dry soil is extremely difficult by absorption extraction, and conventional way is constantly planted using land super enriching plant, administers the phase Generally -5 years 3 years, the economic output in soil is greatly delayed, governance efficiency is low and cost is very high, is nothing most critical The heavy metal that method completes largely is administered, and in routine techniques, is only capable of heavy metal being down to the about 40%-50% of previous level (moderate heavy metal pollution), on the soil of serious pollution, even super enriching plant is also difficult to survive, even more it is difficult to administer, Present invention activity increase in water environment using heavy metal ion, passes through chemistry side with reference to existing gel electrochemistry flocculation precipitation method Formula simply and efficiently clears up the heavy metal of excessive concentrations, and reasonably completes X (OH) y type heavy metals using high alkalinity potassium hydroxide Precipitation, while the potassium concn in water body is added, XySz type heavy metal precipitations are completed using hydrogen sulfide again, root is it was found that almost The heavy metal ion of all conventional heavy metal pollutions can be precipitated out by both coprecipitation modes, further through gel electrochemistry Flocculation precipitation method proposes the stable heavy metal compound of a part, and the heavy metal concentration that first can be mixed soil in water body reduces About 50%-60%;Heavy metal pollution is easy to bounce-back mainly due to except soil is contaminated in itself in routine techniques, soil periphery Waters (earth's surface irrigation canals and ditches and underground water) it is equally contaminated, due to the interception function of soil layer, typically involve in the heavy metal of underground (unless the soil of the overweight metal of method improvement is filled with simple water) of reduced contamination is heavy metal-polluted according to the investigation data of inventor In the general rich earth's surface waters in the soil layer away from earth's surface 20cm-30cm and around soil of collection of dye, thus the present invention by soil with Periphery irrigation canals and ditches combined governance, the consumption at cleaning water source is both saved, it is dirty with the effect controlled to have reached two again;Removed by chemical method After the heavy metal pollution of part, the heavy metal of remaining low concentration is only administered by raw plant method, and present invention employs water spinach With two kinds of emergent aquactic plants of canna, a kind of submerged plant of brown alga, two kinds of card state duckweed, duckweed floating plants, this five kinds are a huge sum of money The super enriching plant of category, and the heavy metal species of plant adaptive is different, forms and improves complementation, and the life for passing through plant The heavy metal adsorption that activity can administer near underwater mud, water body centre and water meter simultaneously, is that a kind of comprehensive heavy metal is controlled Reason;By complete the first round be also heavy metal pollution most serious when improvement after (- 2 months January), you can utilize only slight pollution Water body carries out certain economic operation, reduces treatment cost, the space lotus 36 that the present invention selects is a kind of more emerging heavy Metal not enriching plant (i.e. phytem is not easy to absorb the plant variety of heavy metal), and this kind belongs to the special kinds for abounding with the seedpod of the lotus, According to the data of applicant, the space lotus 36 in slight heavy metal pollution waters is planted in being planted in cleaning waters too Content of beary metal is almost identical in the seedpod of the lotus of empty No. 36 outputs of lotus, even the root system of most easy enriching heavy metal --- in rhizoma nelumbinis Content of beary metal is also without departing from the safe range of national regulation, but the industrial crops of the present invention are mainly that the output seedpod of the lotus (inclines per public affairs Produce 1500 kilograms -1800 kilograms), considerable degree of economic well-being of workers and staff can be harvested, because the speed of growth is very fast, Yu Chunchu is (logical Cross after five kinds of super enriching plants plant one month) implantation, exactly optimum growth cycle, due to the characteristic of lotus system plantation, Winter necessarily does the pool, can also kill two birds with one stone, and the soil administered is proposed, changes to other region contaminated soils again, because This present invention can complete the improvement of heavy metal contaminated soil within a term, administer thoroughly, can water and soil it is double control, do not rebound, can Fundamentally improved soil heavy metal pollution situation, actual measurement can reduce heavy metal content in soil 85%-93%, normal far above existing Advise the 40%-50% of monotechnics.
Embodiment
Embodiment 1:
A kind of method of restoration of the ecosystem heavy-metal contaminated soil, comprises the following steps:
1) pre-preparation
1. using bull-dozer and excavator, contaminated soil layer is excavated to 60cm depth;
2. pond is administered at the cement base bottom for preparing a deep 1.2m, bottom of pond area is suitable with once administering soil surface area;
3. by step 1. in excavate soil layer push-in administer pond;
4. extracting the contaminated ground water in irrigation canals and ditches nearby, pour into and administer pond, 0.8m is risen to height of water level;
5. soil to be administered of stirring, extremely it is well mixed with water;
2) chemical harnessing
1. it is respectively acid-base reagent from potassium hydroxide and hydrogen sulfide;
2. first putting into potassium hydroxide to water PH value 10, stirred simultaneously during input;
3. putting into hydrogen sulfide neutralization again, to pH value 7, stirred simultaneously during input;
4. applying electric flocculation method using heavy metal gel removes heavy metal precipitation thing, the chemical harnessing stage is completed;
3) three-dimensional super enrichment water body treating
1. water spinach and canna are planted with 9/m3 density respectively in water body, the water body plantation canna close to edge, Intermediate waters plant water spinach;
2. brown alga is implanted into water body, 4/m of implant density3
3. planting card state duckweed, duckweed on the water surface, give free rein to grow;
4) above water economic plants is planted
1. after the 3) stage is carried out 45 days, seed covering space lotus 36;
2. 3) plant that the stage uses changes plant for every 3 months once, 1. space lotus 36 that step is planted is with 1 year for a phase;
5) soil treatment after administering
1. after term improvement terminates, the Winter Dry pool takes rhizoma nelumbinis, clears out pool bottom mud whereby, and these mud are to be administered Good soil.
The soil administered according to the present embodiment, surveyed according to the serious soil of certain heavy metal pollution near Honghu in Hubei province, The 93% of heavy metal-polluted soil total content can be reduced.
Embodiment 2
It is overall consistent with embodiment 1, it is in place of difference:
A kind of method of restoration of the ecosystem heavy-metal contaminated soil, comprises the following steps:
1) pre-preparation
1. using bull-dozer and excavator, contaminated soil layer is excavated to 50cm depth;
2. pond is administered at the cement base bottom for preparing a deep 1.0m, bottom of pond area is suitable with once administering soil surface area;
4. extracting the contaminated ground water in irrigation canals and ditches nearby, pour into and administer pond, 0.6m is risen to height of water level;
2) chemical harnessing
3. putting into hydrogen sulfide neutralization again, to pH value 6.5, stirred simultaneously during input;
3) three-dimensional super enrichment water body treating
1. with 4/m in water body3- 9/m3Density plants water spinach and canna respectively, and the water body plantation close to edge is beautiful People any of several broadleaf plants, intermediate waters plantation water spinach;
4) above water economic plants is planted
1. after the 3) stage carries out January, seed covering space lotus 36;
The soil administered according to the present embodiment, surveyed according to the serious soil of certain heavy metal pollution near Honghu in Hubei province, The 85% of heavy metal-polluted soil total content can be reduced.
Embodiment 3
It is overall consistent with embodiment 1, it is in place of difference:
A kind of method of restoration of the ecosystem heavy-metal contaminated soil, comprises the following steps:
2) chemical harnessing
2. first putting into potassium hydroxide to water PH value 10.5, stirred simultaneously during input;
3. putting into hydrogen sulfide neutralization again, to pH value 7.5, stirred simultaneously during input;
3) three-dimensional super enrichment water body treating
1. in water body with 9/3Density plants water spinach and canna respectively, the water body plantation canna close to edge, in Between waters plantation water spinach;
4) above water economic plants is planted
1. after the 3) stage is carried out 2 months, seed covering space lotus 36;
The soil administered according to the present embodiment, surveyed according to the serious soil of certain heavy metal pollution near Honghu in Hubei province, The 91% of heavy metal-polluted soil total content can be reduced.
The foregoing description of the disclosed embodiments, only for enabling professional and technical personnel in the field to realize or using this Invention.A variety of modifications to these embodiments will be apparent for those skilled in the art, institute herein The General Principle of definition can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, The present invention is not intended to be limited to the embodiments shown herein, and is to fit to special with principles disclosed herein and novelty The consistent most wide scope of point.

Claims (1)

1. a kind of method of restoration of the ecosystem heavy-metal contaminated soil, it is characterised in that comprise the following steps:
1) pre-preparation
1. using bull-dozer and excavator, contaminated soil layer is excavated to 50cm-60cm depth;
2. pond is administered at the cement base bottom for preparing a deep 1.0m-1.2m, bottom of pond area is suitable with once administering soil surface area;
3. by step 1. in excavate soil layer push-in administer pond;
4. extracting the contaminated ground water in irrigation canals and ditches nearby, pour into and administer pond, 0.6m-0.8m is risen to height of water level;
5. soil to be administered of stirring, extremely it is well mixed with water;
2) chemical harnessing
1. it is respectively acid-base reagent from potassium hydroxide and hydrogen sulfide;
2. first putting into potassium hydroxide to water PH value 10-10.5, stirred simultaneously during input;
3. putting into hydrogen sulfide neutralization again, to pH value 6.5-7.5, stirred simultaneously during input;
4. applying electric flocculation method using heavy metal gel removes heavy metal precipitation thing, the chemical harnessing stage is completed;
3) three-dimensional super enrichment water body treating
1. with 4/m in water body3- 9/m3 density plants water spinach and canna respectively, the water body plantation beauty close to edge Any of several broadleaf plants, intermediate waters plantation water spinach;
2. brown alga is implanted into water body, 4/m of implant density3
3. planting card state duckweed, duckweed on the water surface, give free rein to grow;
4) above water economic plants is planted
1. after the 3) stage carries out -2 months January, seed covering space lotus 36;
2. 3) plant that the stage uses changes plant for every 3 months once, 1. space lotus 36 that step is planted is with 1 year for a phase;
5) soil treatment after administering
1. after term improvement terminates, the Winter Dry pool takes rhizoma nelumbinis, clears out pool bottom mud whereby, and these mud are what is administered Soil.
CN201710996708.0A 2017-10-19 2017-10-19 A kind of method of restoration of the ecosystem heavy-metal contaminated soil Pending CN107695087A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710996708.0A CN107695087A (en) 2017-10-19 2017-10-19 A kind of method of restoration of the ecosystem heavy-metal contaminated soil

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710996708.0A CN107695087A (en) 2017-10-19 2017-10-19 A kind of method of restoration of the ecosystem heavy-metal contaminated soil

Publications (1)

Publication Number Publication Date
CN107695087A true CN107695087A (en) 2018-02-16

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Country Link
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110756576A (en) * 2019-09-12 2020-02-07 金晨辉 Soil replacement lead removal method for soil lead pollution treatment

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103736721A (en) * 2014-01-23 2014-04-23 雷学军 Method for biologically remediating water body and soil comprehensively utilizing resources
CN104761059A (en) * 2015-04-09 2015-07-08 北京科技大学 Method for reducing heavy metals in river-going overland runoff by aquatic plant matched growth
CN104828999A (en) * 2015-04-14 2015-08-12 无锡市润源环保设备有限公司 Ultrasonic atomization treatment process of electric power plant desulfurization wastewater
CN104941993A (en) * 2015-07-22 2015-09-30 句容市雾起山家庭农场 Comprehensive remediation method for seriously polluted land
CN105598144A (en) * 2016-03-22 2016-05-25 安徽工程大学 Restoration method of polluted soil
CN106966508A (en) * 2017-05-26 2017-07-21 湖南农业大学 The method that a kind of utilization Plant Pond+artificial wetland high-efficiency removes heavy metal in farmland irrigating water

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103736721A (en) * 2014-01-23 2014-04-23 雷学军 Method for biologically remediating water body and soil comprehensively utilizing resources
CN104761059A (en) * 2015-04-09 2015-07-08 北京科技大学 Method for reducing heavy metals in river-going overland runoff by aquatic plant matched growth
CN104828999A (en) * 2015-04-14 2015-08-12 无锡市润源环保设备有限公司 Ultrasonic atomization treatment process of electric power plant desulfurization wastewater
CN104941993A (en) * 2015-07-22 2015-09-30 句容市雾起山家庭农场 Comprehensive remediation method for seriously polluted land
CN105598144A (en) * 2016-03-22 2016-05-25 安徽工程大学 Restoration method of polluted soil
CN106966508A (en) * 2017-05-26 2017-07-21 湖南农业大学 The method that a kind of utilization Plant Pond+artificial wetland high-efficiency removes heavy metal in farmland irrigating water

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110756576A (en) * 2019-09-12 2020-02-07 金晨辉 Soil replacement lead removal method for soil lead pollution treatment

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Application publication date: 20180216