CN109351764A - The passivator of cadmium in one kind of multiple heavy-metal contaminated soils - Google Patents
The passivator of cadmium in one kind of multiple heavy-metal contaminated soils Download PDFInfo
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- CN109351764A CN109351764A CN201811249379.4A CN201811249379A CN109351764A CN 109351764 A CN109351764 A CN 109351764A CN 201811249379 A CN201811249379 A CN 201811249379A CN 109351764 A CN109351764 A CN 109351764A
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- passivator
- cadmium
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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
- B09C1/02—Extraction using liquids, e.g. washing, leaching, flotation
-
- 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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- 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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- Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses the passivator of cadmium in one kind of multiple heavy-metal contaminated soils, including precipitating reagent, alkalinity regulator, cadmium ion antagonist.Through the above way, the passivator of various heavy Cadium In Polluted Soil of the invention, there is excellent immobilization role to heavy metals such as copper, zinc, lead, especially fixed and stabilization effect is separated in the presence of other plurality of heavy metal, the leaching concentration of cadmium in soil can be effectively reduced, it is good to the in-situ immobilization effect of soil.
Description
Technical field
The present invention relates to soil remediation technologies, more particularly to the passivator of cadmium in one kind of multiple heavy-metal contaminated soils.
Background technique
The main source of Cadmium Pollution in Soils is generally phosphate fertilizer carrying, but in China, industrial residue, exhaust gas and useless containing cadmium
Water, phosphate fertilizer, pesticide etc. become China and endanger serious farmland pollution source.The bio-toxicity of cadmium is strong, and biological effectiveness is than it
His heavy metal is higher, is easy to accumulate in agricultural product, it is easier to be detrimental to health.The pollution day of China's agricultural soil cadmium at present
It is beneficial seriously and universal, seriously threaten China's food safety.Cadmium pollution makes rice growth be obstructed, and leads to yield, quality
It reduces, Cd concentration of brown rice is significantly increased, and is formed " cadmium rice ", and be made up of food chain to human body and directly threaten.The phosphoric acid of cadmium
Salt, dihydric phosphate, carbonate, sulfate, hydroxide solubility product constant are larger, thus mobility is high, and migration is strong, is difficult
To carry out repairing stabilized metallic element by common process for fixation.
Summary of the invention
The invention mainly solves the technical problem of providing the passivator of cadmium in one kind of multiple heavy-metal contaminated soils, use
Effect is good.
In order to solve the above technical problems, one technical scheme adopted by the invention is that: one kind of multiple heavy metal pollutions are provided
The passivator of cadmium in soil, including precipitating reagent, alkalinity regulator, cadmium ion antagonist, in the various heavy contaminated soil
The content of the passivator each component of cadmium are as follows: in parts by weight, 10-50 parts of precipitating reagent, 20-30 parts of alkalinity regulator, cadmium ion
40-50 parts of antagonist.
In a preferred embodiment of the present invention, the precipitating reagent is alkali metal dihydric phosphate, alkaline-earth metal di(2-ethylhexyl)phosphate
One of hydrogen salt, phosphate fertilizer, ground phosphate rock, hydroxyapatite are a variety of.
In a preferred embodiment of the present invention, the alkalinity regulator is calcium oxide, calcium hydroxide, blast furnace ash, fine coal
One of ash, plant ash, cement are a variety of.
In a preferred embodiment of the present invention, the cadmium ion antagonist be salt containing zinc ion, calcium ions salt,
One of minerals of minerals, calcium ions containing zinc ion are a variety of.
It in a preferred embodiment of the present invention, further include inhaling in the passivator of the various heavy Cadium In Polluted Soil
Attached dose, the adsorbent is one of molysite, aluminium salt, molecular sieve, zeolite, bentonite, attapulgite or a variety of.
In a preferred embodiment of the present invention, the passivator each component of the various heavy Cadium In Polluted Soil contains
Amount are as follows: in parts by weight, 10-50 parts of precipitating reagent, 20-30 parts of alkalinity regulator, 40-50 parts of cadmium ion antagonist, adsorbent
20-40 parts.
The beneficial effects of the present invention are: the passivator of various heavy Cadium In Polluted Soil of the invention, to copper, zinc, lead
Equal heavy metals have excellent immobilization role, especially imitate to the fixed and stabilisation that is separated in the presence of other plurality of heavy metal
It answers, the leaching concentration of cadmium in soil can be effectively reduced, it is good to the in-situ immobilization effect of soil.
Specific embodiment
The technical scheme in the embodiments of the invention will be clearly and completely described below, it is clear that described implementation
Example is only a part of the embodiments of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this field is common
Technical staff's all other embodiment obtained without making creative work belongs to the model that the present invention protects
It encloses.
Embodiment one:
There is provided the passivator of cadmium in one kind of multiple heavy-metal contaminated soils, concrete component are as follows: calcium dihydrogen phosphate, calcium hydroxide, sulphur
Sour calcium, attapulgite, the quality for weighing each component is calcium dihydrogen phosphate 0.3kg, calcium hydroxide 0.3kg, calcium sulfate 0.5kg, recessed
Convex stick stone 0.3kg.
Embodiment two:
There is provided the passivator of cadmium in one kind of multiple heavy-metal contaminated soils, concrete component are as follows: dibastic sodium phosphate, cement, zinc sulfate, boiling
Stone, the quality for weighing each component is dibastic sodium phosphate 0.1kg, cement 0.3kg, zinc sulfate 0.45kg, zeolite 0.25kg.
Embodiment three:
There is provided the passivator of cadmium in one kind of multiple heavy-metal contaminated soils, concrete component are as follows: calcium dihydrogen phosphate, calcium hydroxide, water
Mud, calcium sulfate, the quality for weighing each component is calcium dihydrogen phosphate 0.5kg, calcium hydroxide 0.1kg, cement 0.1kg, calcium sulfate
0.4kg。
The principle of the passivator of the various heavy Cadium In Polluted Soil are as follows: using lead as the fixed stably of the heavy metal of representative
Fixedization can be indicated with following procedure:
10Pb2++6H2PO4 -+2H2O→Pb10 (PO4)6(OH) 2+14H+
Pb10 (PO4)6(OH) 2+xPb2+→Ca10−xPbxPO4 (OH) 2+xCa2+。
The deposition of cadmium is the further ion exchange-deposition process carried out on the basis of above-mentioned deposition reaction: Pb10
(PO4)6(OH)2+xCd2+→Ca10−xPbxPO4 (OH) 2+xCa2+。
The passivation effect of the passivator of the various heavy Cadium In Polluted Soil is tested: the practical soil in acquisition northwest somewhere
Sample removes the sundries such as big partial size stone, tree root, weeds in soil, air-dries indoors, cross 2mm sieve.In 300g soil, it is added
Passivator described in embodiment one is uniformly mixed, and keeping soil moisture content is 25~30%, after maintenance 5 days, is leached by standard
The leaching that method (HJ/T 299-2007 sulfonitric method) measures 6 heavy metal species such as Cu, Zn, Pb, Cd, As, Hg in soil is dense
Degree.
Experiment see the table below with heavy metal-polluted soil concentration index.
Leaching concentration after the passivator use of the various heavy Cadium In Polluted Soil see the table below.
Contaminated soil 1,3 three contaminated soil 2, contaminated soil pedotheques are chosen, to using before passivator and use blunt
The DTPA leaching experiment of cadmium is carried out after agent, experiment shows that passivator has apparent immobilization role to cadmium.Concrete outcome is such as
Following table, analysis result are obtained by atomic fluorescence spectrophotometer.
Passivator proposed by the present invention can not only have excellent immobilization role to heavy metals such as copper, zinc, lead, especially
Special fixation and stabilization effect are shown to the cadmium under other a large amount of heavy metal existence conditions.Use of the invention, can be with
The leaching concentration of heavy metal in soil especially cadmium is effectively reduced.Passivator provided by the invention, can be used for based on cadmium pollution
The soil of various heavies high density pollution such as copper, lead, zinc, cadmium, arsenic, mercury in-situ immobilization.The effect of molysite in the present invention,
It is to play it to act on the strong adsorption of the arsenate, arsenous anion that coexist, inhibits the leaching behavior of arsenic.
The above description is only an embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair
Equivalent structure or equivalent flow shift made by bright description is applied directly or indirectly in other relevant technology necks
Domain is included within the scope of the present invention.
Claims (6)
1. the passivator of cadmium in one kind of multiple heavy-metal contaminated soils, which is characterized in that including precipitating reagent, alkalinity regulator, cadmium
Antagonism of ions agent, the content of the passivator each component of the various heavy Cadium In Polluted Soil are as follows: in parts by weight, precipitating reagent
10-50 parts, 20-30 parts of alkalinity regulator, 40-50 parts of cadmium ion antagonist.
2. the passivator of various heavy Cadium In Polluted Soil according to claim 1, which is characterized in that the precipitating reagent
For one of alkali metal dihydric phosphate, alkaline-earth metal dihydric phosphate, phosphate fertilizer, ground phosphate rock, hydroxyapatite or a variety of.
3. the passivator of various heavy Cadium In Polluted Soil according to claim 1, which is characterized in that the basicity tune
Section agent is one of calcium oxide, calcium hydroxide, blast furnace ash, flyash, plant ash, cement or a variety of.
4. the passivator of various heavy Cadium In Polluted Soil according to claim 1, which is characterized in that the cadmium ion
Antagonist be salt containing zinc ion, the salt of calcium ions, the minerals containing zinc ion, calcium ions one of minerals or
It is a variety of.
5. the passivator of various heavy Cadium In Polluted Soil according to claim 1, which is characterized in that described a variety of heavy
It in the passivator of cadmium further include adsorbent in metallic pollution soil, the adsorbent is molysite, aluminium salt, molecular sieve, zeolite, swelling
One of soil, attapulgite are a variety of.
6. the passivator of various heavy Cadium In Polluted Soil according to claim 5, which is characterized in that described a variety of heavy
The content of the passivator each component of cadmium in metallic pollution soil are as follows: in parts by weight, 10-50 parts of precipitating reagent, alkalinity regulator
20-30 parts, 40-50 parts of cadmium ion antagonist, 20-40 parts of adsorbent.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811249379.4A CN109351764A (en) | 2018-10-25 | 2018-10-25 | The passivator of cadmium in one kind of multiple heavy-metal contaminated soils |
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| CN201811249379.4A CN109351764A (en) | 2018-10-25 | 2018-10-25 | The passivator of cadmium in one kind of multiple heavy-metal contaminated soils |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109971482A (en) * | 2019-04-03 | 2019-07-05 | 河南清水源科技股份有限公司 | A kind of composite conditioner and preparation method thereof suitable for basic soil winter wheat cadmium pollution |
| CN110105958A (en) * | 2019-06-14 | 2019-08-09 | 许昌学院 | A kind of the mine soil reparation reagent and its application method of heavy metal lead pollution |
| CN110125163A (en) * | 2019-05-28 | 2019-08-16 | 红河创新技术研究院 | A kind of mineralogy restorative procedure of heavy-metal composite pollution soil |
| CN110423624A (en) * | 2019-09-03 | 2019-11-08 | 森特士兴集团股份有限公司 | A kind of stabilization renovation agent of soil pollution and preparation and application |
| CN110819352A (en) * | 2019-10-28 | 2020-02-21 | 安徽省通源环境节能股份有限公司 | Stabilizer applicable to heavy metal pollution |
| CN111234826A (en) * | 2020-02-17 | 2020-06-05 | 江苏大学 | Compounded passivating agent for reducing cadmium content in greenhouse vegetables and application thereof |
| CN116536056A (en) * | 2023-06-30 | 2023-08-04 | 天津渤化环境修复股份有限公司 | Soil pollution repairing agent |
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| CN109971482A (en) * | 2019-04-03 | 2019-07-05 | 河南清水源科技股份有限公司 | A kind of composite conditioner and preparation method thereof suitable for basic soil winter wheat cadmium pollution |
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| CN110105958A (en) * | 2019-06-14 | 2019-08-09 | 许昌学院 | A kind of the mine soil reparation reagent and its application method of heavy metal lead pollution |
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| CN110819352A (en) * | 2019-10-28 | 2020-02-21 | 安徽省通源环境节能股份有限公司 | Stabilizer applicable to heavy metal pollution |
| CN111234826A (en) * | 2020-02-17 | 2020-06-05 | 江苏大学 | Compounded passivating agent for reducing cadmium content in greenhouse vegetables and application thereof |
| CN116536056A (en) * | 2023-06-30 | 2023-08-04 | 天津渤化环境修复股份有限公司 | Soil pollution repairing agent |
| CN116536056B (en) * | 2023-06-30 | 2023-09-15 | 天津渤化环境修复股份有限公司 | Soil pollution repairing agent |
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Application publication date: 20190219 |