CN108941182A - A kind of heavy metals in farmland pollution amelioration agent and restorative procedure - Google Patents
A kind of heavy metals in farmland pollution amelioration agent and restorative procedure Download PDFInfo
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- CN108941182A CN108941182A CN201810613650.1A CN201810613650A CN108941182A CN 108941182 A CN108941182 A CN 108941182A CN 201810613650 A CN201810613650 A CN 201810613650A CN 108941182 A CN108941182 A CN 108941182A
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- soil
- heavy metals
- farmland
- contaminated
- pollution amelioration
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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
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K17/00—Soil-conditioning materials or soil-stabilising materials
- C09K17/40—Soil-conditioning materials or soil-stabilising materials containing mixtures of inorganic and organic compounds
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Inorganic Chemistry (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a kind of heavy metals in farmland pollution amelioration agent, ingredient includes ferric sulfate, calcium chloride, citric acid and ammonium dihydrogen phosphate, a kind of restorative procedure of heavy metals in farmland pollution amelioration agent, step include: (1) by ferric sulfate, calcium chloride, citric acid and ammonium dihydrogen phosphate according to mass ratio are as follows: 20-30:20-30:5-10:10-15 prepare mixing, it is uniformly sprinkled into contaminated farmland and rotary tillage, depth is depending on contaminated soil depth；(2) contaminated soil is irrigated according to Tu Shui ratio 1:2-2.5；(3) ultimate density for keeping renovation agent is 0.15mol/L；(4) pH value 7-9 is adjusted with sodium hydroxide；(5) it static 5 hours or more, collects liquid phase and carries out harmless treatment；(6) when soil water restoration is to normal value, deep rotary tillage after organic fertilizer, plant ash and lime is applied into soil, and at least conserve 10 days.The present invention is by applying the heavy metal renovation agent especially prepared into contaminated soil, and the liquid phase in contaminated soil is collected after carrying out rotary tillage irrigation and carries out harmless treatment, organic fertilizer, plant ash and lime are applied into soil again, and conserved, achieve the purpose that thorough restoration of soil polluted by heavy metal.
Description
Technical field
The present invention relates to heavy metal processing technology field, in particular to a kind of heavy metals in farmland pollution amelioration agent and reparation side
Method.
Background technique
Soil is is one of the main natural resources on which mankind depends and an important part of the human ecological environment.
With the rapid development of industry and mining, heavy metal pollution of soil has been got worse, the heavy metal in contaminated soil mainly have mercury, cadmium,
Lead, copper, chromium, arsenic, nickel, iron, manganese, zinc etc..Heavy metal pollution of soil carries out sewage irrigation and sludge application mainly from long-term, by
Pesticide of the application containing lead, mercury, cadmium, arsenic etc. and unreasonably apply chemical fertilizer, using agricultural plastic film and industrial production,
A large amount of pernicious gases and dust containing heavy metal etc. that motor vehicle exhaust emission, auto tire wear generate cause.It has hidden
The characteristics of property, chronicity and irreversibility.Harmful heavy metal accumulation to a certain extent, not only results in soil degradation in soil,
Crop yield and quality decline, but also hydrology ring can be deteriorated by runoff, leaching loss contaminating action surface water and groundwater
Border, and may directly poisonous plant or be detrimental to health by food chain approach, " the ostalgia that such as Japanese early 20th century occurs
Disease " be exactly because eat rice containing cadmium caused by.Cadmium pollution (being greater than 1mg/kg) rice, in addition to suffering from " Itai-itai diseases ", Qing Zheye is eaten for a long time
Hypertension, sodium detention and enzyme system, fecundity can be caused impacted.Therefore the repairing and treating of heavy-metal contaminated soil has become
The problem of very being paid close attention to for everybody.
The cardinal principle of heavy-metal contaminated soil restorative procedure has two at present: change heavy metal in the soil there are shapes
Formula reduces its toxicity；Heavy metal in soil is removed.According to principle at present typical restorative procedure mainly include the following types:
The first, Electroremediation: plugging electrode at contaminated soil both ends, after powering on, charged particle in soil to
On conductive electrodes, to achieve the purpose that remove Heavy Metals in Contaminated Soils.In Europe, this technology is not only applicable to lead contamination soil
Earth, while the reparation for the Polluted Soils soil such as be also applied to copper, zinc, chromium, nickel and good fortune.
The second, phytoremediation: phytoremediation mainly absorbs heavy metal in soil by super enriching plant, and heavy metal is shifted
To aboveground vegetation part, then the aboveground vegetation part of enriching heavy metal is gathered in, recycles heavy metal after burning, it is dirty to reach reparation
The purpose of dye.
Third, fixing-stable: fixing-stableization generally uses heavy metal organic sequestering agent or curing agent and Polluted Soil
Heavy metal reacts in earth, generates stable material to reduce the Leaching of heavy metal and achievees the purpose that reparation.It uses at present
Inorganic soil curing agent generally using ordinary portland cement as primary raw material, cooperate other cementitious materials, alkali-activator and table
Soil remediation is carried out after the mixing of face activating agent.
Heavy metal pollution of soil is administered there are many method, and some methods engineerings invest big, destructible soil texture.As specially
Sharp 104108765 A of CN discloses a kind of restorative procedure in heavy metal pollution farmland, and this method is needed the table in contaminated farmland
Layer soil removal dries pulverizing transport carries out strange land reparation, and workload is huge, higher cost；Some methods are over time
Effect is difficult to ensure that, if 105238409 A of patent CN discloses a kind of restorative procedure of heavy-metal contaminated soil, this method is only
It is to fix heavy metal in the soil, is not easy to be absorbed and used by plants, but with the long-term change of environment, heavy metal element may
Can by again release to form secondary pollution；Some method repair time is longer, and effect is unstable, such as patent CN
103521508 A disclose a kind of plant restoration method of contaminated soil, and this method is although at low cost, and secondary pollution is few, still
Repair time is longer, and repairing effect is affected by a natural larger.Therefore, the top priority of heavy-metal contaminated soil reparation is
Find a kind of efficient, economic, green recovery technique.
Summary of the invention
The present invention is directed to propose a kind of safe and reliable, advantage of lower cost and the relatively stable farmland various heavy of effect
The method of pollution amelioration.
To achieve the above object, the technical scheme adopted by the invention is as follows:
A kind of heavy metals in farmland pollution amelioration agent, ingredient include ferric sulfate, calcium chloride, citric acid and ammonium dihydrogen phosphate.
Further, the ferric sulfate, calcium chloride, citric acid and ammonium dihydrogen phosphate mass ratio are as follows: 20-30:20-30:5-
10:10-15.
Further, a kind of restorative procedure of heavy metals in farmland pollution amelioration agent, step include:
(1) by ferric sulfate, calcium chloride, citric acid and ammonium dihydrogen phosphate according to mass ratio are as follows: 20-30:20-30:5-10:
10-15 prepares mixing, is uniformly sprinkled into contaminated farmland and rotary tillage, depth is depending on contaminated soil depth；
(2) contaminated soil is irrigated according to Tu Shui ratio 1:2-2.5；
(3) ultimate density for keeping renovation agent is 0.15mol/L；
(4) pH value 7-9 is adjusted with sodium hydroxide；
(5) it static 5 hours or more, collects liquid phase and carries out harmless treatment；
(6) when soil water restoration is to normal value, deep rotary tillage after organic fertilizer, plant ash and lime is applied into soil,
And it at least conserves 10 days.
Further, the mass fraction ratio that organic fertilizer, plant ash and lime are applied into soil is 30-40:30-40:15-
20, mu amount of application is no less than 1 ton.
Compared with prior art, the invention has the following beneficial effects:
1, repairing effect is good, can directly remove the heavy metal in soil, the phenomenon that being activated there is no heavy metal；
2, cost is relatively low, and unit area rehabilitation cost about reduces by 50% or so；
3, various heavy pollution that can simultaneously in rehabilitating soil.
Specific embodiment
To be easy to understand the technical means, the creative features, the aims and the efficiencies achieved by the present invention, below with reference to
Specific embodiment, the present invention is further explained.
Embodiment 1:
It chooses certain farmland pollution soil and makees experimental subjects, detect content of beary metal before its 15cm depth topsoil is repaired
Are as follows: mercury 0.54mg/kg, copper 83.6mg/kg, zinc 152.8mg/kg, nickel 63.4mg/kg, lead 40.2mg/kg, cadmium 2.03mg/kg,
Total chromium 173.1mg/kg.
A kind of heavy metals in farmland pollution amelioration agent, ingredient include ferric sulfate, calcium chloride, citric acid and ammonium dihydrogen phosphate.
A kind of restorative procedure of heavy metals in farmland pollution amelioration agent, step include:
(1) by ferric sulfate, calcium chloride, citric acid and ammonium dihydrogen phosphate mass ratio are as follows: the mass ratio of 25:25:10:15 mixes
It is good.Uniformly it is sprinkled into above-mentioned farmland and rotary tillage, depth 15cm or so.
(2) contaminated soil is irrigated according to Tu Shui ratio 1:2.
(3) ultimate density for keeping renovation agent is 0.15mol/L.
(4) adjusting pH value with sodium hydroxide is about 8.
(5) it static 5 hours, collects liquid phase and carries out harmless treatment.
(6) when soil water restoration is to normal value, organic fertilizer, plant ash and lime are mixed according to mass ratio 35:35:20
Field rotary tillage is applied after conjunction, sowing amount is one ton per acre, is conserved 10 days.
Table 1 is that 15cm depth topsoil soils repair front and back content of beary metal (mg/kg) in repair.
Repairing effect detects the content of beary metal in soil after repair respectively behind 1 month, 3 months, half a year and 1 year,
Heavy metals removal significant effect.
The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent thereof.
Claims (4)
1. a kind of heavy metals in farmland pollution amelioration agent, which is characterized in that ingredient includes ferric sulfate, calcium chloride, citric acid and phosphoric acid
Ammonium dihydrogen.
2. a kind of heavy metals in farmland pollution amelioration agent according to claim 1, it is characterised in that: the ferric sulfate, chlorination
Calcium, citric acid and ammonium dihydrogen phosphate mass ratio are as follows: 20-30:20-30:5-10:10-15.
3. a kind of restorative procedure of heavy metals in farmland pollution amelioration agent, it is characterised in that step includes:
(1) by ferric sulfate, calcium chloride, citric acid and ammonium dihydrogen phosphate according to mass ratio are as follows: 20-30:20-30:5-10:10-15
Mixing is prepared, is uniformly sprinkled into contaminated farmland and rotary tillage, depth is depending on contaminated soil depth；
(2) contaminated soil is irrigated according to Tu Shui ratio 1:2-2.5；
(3) ultimate density for keeping renovation agent is 0.15mol/L；
(4) pH value 7-9 is adjusted with sodium hydroxide；
(5) it static 5 hours or more, collects liquid phase and carries out harmless treatment；
(6) when soil water restoration is to normal value, deep rotary tillage after organic fertilizer, plant ash and lime is applied into soil, and extremely
It conserves 10 days less.
4. a kind of restorative procedure of heavy metals in farmland pollution amelioration agent according to claim 3, it is characterised in that: to soil
The middle mass fraction ratio for applying organic fertilizer, plant ash and lime is 30-40:30-40:15-20, and mu amount of application is no less than 1 ton.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810613650.1A CN108941182A (en) | 2018-06-14 | 2018-06-14 | A kind of heavy metals in farmland pollution amelioration agent and restorative procedure |
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| CN201810613650.1A CN108941182A (en) | 2018-06-14 | 2018-06-14 | A kind of heavy metals in farmland pollution amelioration agent and restorative procedure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115446105A (en) * | 2022-09-05 | 2022-12-09 | 广西德润土地整理有限公司 | Soil comprehensive treatment method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103952156A (en) * | 2014-03-27 | 2014-07-30 | 黎虹 | Heavy metal passivating agent, farmland purifying method and use thereof |
| CN105013812A (en) * | 2015-07-08 | 2015-11-04 | 广东省生态环境与土壤研究所 | Technology for rapidly restoring heavy metal pollution of farmland |
| CN106800933A (en) * | 2017-01-11 | 2017-06-06 | 四川宜可环保技术有限公司 | A kind of passivator repaired for farmland soil heavy metals combined pollution and its preparation and application |
| CN106825018A (en) * | 2016-12-19 | 2017-06-13 | 东莞中科土壤科技开发有限公司 | A kind of composite chemical ELUTION METHOD of efficient restoration of soil polluted by heavy metal |
-
2018
- 2018-06-14 CN CN201810613650.1A patent/CN108941182A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103952156A (en) * | 2014-03-27 | 2014-07-30 | 黎虹 | Heavy metal passivating agent, farmland purifying method and use thereof |
| CN105013812A (en) * | 2015-07-08 | 2015-11-04 | 广东省生态环境与土壤研究所 | Technology for rapidly restoring heavy metal pollution of farmland |
| CN106825018A (en) * | 2016-12-19 | 2017-06-13 | 东莞中科土壤科技开发有限公司 | A kind of composite chemical ELUTION METHOD of efficient restoration of soil polluted by heavy metal |
| CN106800933A (en) * | 2017-01-11 | 2017-06-06 | 四川宜可环保技术有限公司 | A kind of passivator repaired for farmland soil heavy metals combined pollution and its preparation and application |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115446105A (en) * | 2022-09-05 | 2022-12-09 | 广西德润土地整理有限公司 | Soil comprehensive treatment method |
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