CN104327858A - Soil heavy metal compound stabilizer and method using soil heavy metal compound stabilizer for passivation of soil heavy metals - Google Patents
Soil heavy metal compound stabilizer and method using soil heavy metal compound stabilizer for passivation of soil heavy metals Download PDFInfo
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- CN104327858A CN104327858A CN201410486172.4A CN201410486172A CN104327858A CN 104327858 A CN104327858 A CN 104327858A CN 201410486172 A CN201410486172 A CN 201410486172A CN 104327858 A CN104327858 A CN 104327858A
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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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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D3/00—Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances
- A62D3/30—Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances by reacting with chemical agents
- A62D3/33—Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances by reacting with chemical agents by chemical fixing the harmful substance, e.g. by chelation or complexation
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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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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D2101/00—Harmful chemical substances made harmless, or less harmful, by effecting chemical change
- A62D2101/40—Inorganic substances
- A62D2101/43—Inorganic substances containing heavy metals, in the bonded or free state
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Abstract
The invention relates to the field of soil heavy metal passivation, and especially relates to a soil heavy metal compound stabilizer and a method using the soil heavy metal compound stabilizer for passivation of soil heavy metals, and the soil heavy metal compound stabilizer comprises the following components by weight: 8%-40% of carbide slag, 45%-70% of bacteria residue and 8%-28% of calcium superphosphate. The soil heavy metal compound stabilizer can be used for passivation of the soil heavy metals. The soil heavy metal compound stabilizer is low in cost, simple in operation, wide in sources, and easy in popularization, can be used for passivation stabilization of a variety of soil heavy metals, can reach the objective of fertilizing soil and improving soil properties, and is capable of solid waste reuse of the carbide slag and the bacteria residue.
Description
Technical field
The present invention relates to heavy metal-polluted soil passivation field, particularly relate to a kind of soil heavy metal combined stablizer and the passivating method to heavy metal-polluted soil thereof.
Background technology
In recent years, along with the continuous propelling of Chinese Industrialization and urbanization, soil contamination problem is on the rise, and heavy metal contamination can not only cause the change of composition of the soil, structure and function, crop root growth and photosynthesis can also be suppressed, cause crop failure even to have no harvest.What is more important, heavy metal also can move in animal, human body by food chain, serious harm animal, HUMAN HEALTH.Heavy metal contamination harm common all reports in recent years such as cadmium rice, arsenic poison, blood lead, heavy metal pollution of soil has become one of common problem received much attention in soil pollution.
Common remediation of heavy metal-contaminated soil mainly contains peripheral doses, chemical redemption, biological restoration and agriculture control technique etc.Wherein, chemical passivation/technique for fixing fast, significantly can reduce the biological effectiveness of heavy metal and toxicity due to it and be widely used.Passivating technique mainly relies on passivator to reduce movability and the biological effectiveness of heavy metal in soil, but heavy metal cannot be removed from soil, but it is present in soil with more stable form.At present, the material that can be used as heavy metal deactivator/stablizer has natural zeolite, the peat composed of rotten mosses, ground phosphate rock, unslaked lime etc., and these material costs are higher, application eurytropy is poor, can the serious original physico-chemical property changing soil after too much applying.So, select one or more efficiency are high, stability is permanent passivator to be key in this technology practical application targetedly.
Carbide slag is the trade waste that the enterprise such as chemical industry, machinery gives off in a large number in preparation of ethyne by carbide process.Because carbide slag and percolate are strong basicity; store up infiltration and cause saline Land; and polluted underground water; the dust pollution surrounding enviroment of basic slag ash simultaneously; jeopardize resident living and healthy, therefore carbide slag has been included in the requirement of II class general industrial solid waste and has been managed by national environmental protection department.Carbide slag alkalinity is high, and main chemical compositions is Ca (OH)
2, i.e. white lime.Carbide slag is existing in fields such as building, chemical industry, metallurgy, agriculturals to be applied, if the alkaline nature making full use of carbide slag uses it for the stabilization treatment of heavy-metal contaminated soil, both the improvement of contaminated soil can have been realized, also for the disposal recycling of carbide slag provides new approaches, there is good environmental benefit.
Large quantity research shows, adds the organic heavy metal that can be used in passivation soil in contaminated soil.As effective heavy metal complexing agent, organic substance can by forming insoluble petal-organic double compound, increasing Cation Exchange Capacity in Soils (CEC), reduce water-soluble state and the exchangeable species component of heavy metal in soil, thus reduce its plant availability.Conventional has green manure, brown coal, cultivation excrement thing, organic compost, the peat composed of rotten mosses and crop material etc.Bacterium slag is the organic solid waste that the various edible mushrooms of cultivation is left later, and common processing mode is banked up on the spot or burning disposal, causes the huge waste of agriculture organic resource on the one hand; Cause the deterioration of surrounding environment on the other hand, bacterial reproduction, pathophoresis, this has become the environmental problem that a lot of Rural areas can not be ignored.Bacterium slag/mushroom residue is rich in the nutritive ingredients such as organic matter, nitrogen, phosphorus, potassium; also there is the microflora of substantial amounts; bacterium slag surface also exists the adsorptivity functional groups such as great amount of hydroxy group, phosphoryl, phenolic group; to heavy metal ion such as Cd, Pb, Cr, there is stronger adsorptive power; bacterium slag is once apply in soil; can occur to adsorb the reactions such as complexing with the free state heavy metal ion of enlivening in soil, thus make heavy metal ion fixing by complexing, chelating or absorption.Bacterium slag is as a kind of agricultural solid waste, and Manufacture and application relative inexpensiveness, and wide material sources, have larger application potential in heavy-metal contaminated soil improvement.
Meanwhile, phosphate fertilizer is also the soil heavy metal passivant of a kind of phosphorus containg substances the most frequently used at present.But being used alone phosphate fertilizer Passivation Treatment has certain limitation.Phosphate fertilizer is fine to the passivation effect of lead, but more weak to other heavy metal effect, and its stabilization effect is single, and heavy metal element has certain selectivity.When administering large-area pollution, the addition demand of phosphate fertilizer is large, usually all can paranormal land for growing field crops fertilising consumption, very easily causes the loss of phosphorus, brings the environment hidden danger of secondary pollution.Thus, phosphate fertilizer heavy metal selectivity, amount of application is large, cost is high, there is the features such as environmental risk all limits more extensively using of itself.
If carbide slag, bacterium slag, phosphate fertilizer triplicity can be used for improvement and the ecological recovery of heavy-metal contaminated soil as stablizer, both the heavy metal passivation in soil can be stablized, the effect of fertile soil can be reached again, reduce the destruction to soil property as far as possible, be conducive to the recycling of soil.Meanwhile, can also rehabilitation cost be reduced, achieve the recycling of solid waste, reach the doulbe-sides' victory object of " treatment of wastes with processes of wastes against one another ".
Summary of the invention
For above-mentioned technical problem, the present invention has designed and developed a kind of soil heavy metal combined stablizer and application thereof, object is to provide a kind of with low cost, easy and simple to handle, wide material sources, is easy to promote, both various heavy passivation in soil can be stablized, the object of fertile soil, improvement soil property can be reached again, carbide slag, bacterium slag are carried out to the soil heavy metal combined stablizer of solid waste recycling simultaneously.
Technical scheme provided by the invention is:
A kind of soil heavy metal combined stablizer, comprises following component, each component by percentage to the quality:
Carbide slag 8%-40%, bacterium slag 45%-70% and calcium superphosphate 8%-28%.
Preferably, in described soil heavy metal combined stablizer, the mass percent of each component is:
Carbide slag 35%, bacterium slag 57% and calcium superphosphate 8%.
Preferably, in described soil heavy metal combined stablizer, described carbide slag is the waste residue after calcium carbide hydrolysis obtains acetylene gas, and main component is calcium hydroxide, and the air-dry grinding of described waste residue rear mistake 10 mesh sieve is for subsequent use.
Preferably, in described soil heavy metal combined stablizer, described bacterium slag is the substratum after edible fungus culturing results, after 70-80 DEG C of compost maturity, dry, pulverizes 40 mesh sieves for subsequent use through pulverizer.
Preferably, in described soil heavy metal combined stablizer, commercially available phosphate fertilizer selected by described calcium superphosphate, comprises Ca (H
2pO
4)
2h
2o and a small amount of free phosphoric acid, containing the effective P of 14%-20%
2o
5.
Preferably, described soil heavy metal combined stablizer, in the passivating method of heavy metal-polluted soil, comprises the following steps:
Step one, carbide slag, bacterium slag, calcium superphosphate to be mixed in proportion, fully to stir obtained one package stabilizer;
Step 2, be 1: 5-35 to mix in mass ratio by the one package stabilizer in step one and by the soil of heavy metal contamination, stir, Soil conservation is moistening;
Step 3, reaction are after 3-30 days, and the heavy metal ion in contaminated soil is converted into the heavy metal-organic complex of comparatively stable subcarbonate, precipitation of hydroxide thing, phosphate mineral and indissoluble.
Preferably, described soil heavy metal combined stablizer, in the passivating method of heavy metal-polluted soil, in described step 2, adds the water of 20%-80%, makes the humidity that Soil conservation is certain by the air-dry quality of soil.
Preferably, described soil heavy metal combined stablizer, in the passivating method of heavy metal-polluted soil, comprises the following steps:
Step one, be mixed in proportion with by the soil of heavy metal contamination by carbide slag, stir, 3-14 days is stablized in passivation, maintenance ground moistening;
Step 2, be mixed in proportion by the mixture that calcium superphosphate and step one obtain, stir, 3-14 days is stablized in passivation, keeps soil moisture content identical with step one;
Step 3, the mixture that bacterium slag and step 2 obtain to be mixed in proportion, stir, passivation is stablized, keep soil moisture content identical with step one, the heavy metal ion in contaminated soil is converted into the heavy metal-organic complex of comparatively stable subcarbonate, precipitation of hydroxide thing, phosphate mineral and indissoluble.
Preferably, described soil heavy metal combined stablizer, in the passivating method of heavy metal-polluted soil, all adds the water of 20%-80% by the air-dry quality of soil in described step one, step 2 and step 3.
Preferably, described soil heavy metal combined stablizer, in the passivating method of heavy metal-polluted soil, adds carbide slag to step 3 from step one and adds bacterium slag to passivation terminates, passivation reaction 7-30 days altogether.
Soil heavy metal combined stablizer of the present invention and in the passivating method of heavy metal-polluted soil, one package stabilizer be Appropriate application carbide slag, bacterium slag and calcium superphosphate, to the mechanism of action of copper, lead, zinc, cadmium etc., has given full play to the acting in conjunction of three kinds of raw materials.Carbide slag mainly promotes soil pH by alkaline matter wherein and impels heavy metal to be converted to carbonate and precipitation of hydroxide, bacterium slag is then the heavy metal complex being generated indissoluble by organic and heavy metal generation complexing, chelatropic reaction, phosphate fertilizer, by generating calcium phosphate precipitation thus the movability of reduction heavy metal, weakens the harm of heavy metal in soil.Three is mixed and is prepared in soil that one package stabilizer adds by heavy-metal pollution, can heavy metal effectively in passivation stable soil; If three separately adds process according to certain sequencing, the raw material first added can combine with heavy metal rapidly, and reaction is more abundant, and reduces the drawback of complete combination treatment Raw therein reaction, and the heavy metal stabilising effect of gained is better.
Heavy metal passivation in soil not only can be stablized by one package stabilizer of the present invention, and the raw material environment friendly adopted is comparatively strong, can raising soil organic matter content by a relatively large margin and cation exchange capacity, reaches the object of fertile soil.These one package stabilizer raw material sources are extensively easy to get, and preparation and application is simple, and rehabilitation cost is low, achieve the recycling of industrial solid castoff and agricultural refuse, reach the doulbe-sides' victory object of " treatment of wastes with processes of wastes against one another ".
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the embodiment of the present invention 1 treatment step;
Fig. 2 is the schematic diagram of the embodiment of the present invention 2 treatment step;
Fig. 3 is the schematic diagram of the embodiment of the present invention 6 treatment step;
Fig. 4 is passivating method schematic flow sheet of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail, can implement according to this with reference to specification sheets word to make those skilled in the art.
The invention provides a kind of soil heavy metal combined stablizer, comprise following component, each component by percentage to the quality:
Carbide slag 8%-40%, bacterium slag 45%-70% and calcium superphosphate 8%-28%.
In described soil heavy metal combined stablizer, the mass percent of each component is:
Carbide slag 35%, bacterium slag 57% and calcium superphosphate 8%.
In described soil heavy metal combined stablizer, described carbide slag is the waste residue after calcium carbide hydrolysis obtains acetylene gas, and main component is calcium hydroxide, and the air-dry grinding of described waste residue rear mistake 10 mesh sieve is for subsequent use.
In described soil heavy metal combined stablizer, described bacterium slag is the substratum after edible fungus culturing results, after 70-80 DEG C of compost maturity, dry, pulverizes 40 mesh sieves for subsequent use through pulverizer.
In described soil heavy metal combined stablizer, commercially available phosphate fertilizer selected by described calcium superphosphate, comprises Ca (H
2pO
4)
2h
2o and a small amount of free phosphoric acid, containing the effective P of 14%-20%
2o
5.
Described soil heavy metal combined stablizer, to the passivating method of heavy metal-polluted soil, comprises the following steps:
Step one, carbide slag, bacterium slag, calcium superphosphate to be mixed in proportion, fully to stir obtained one package stabilizer;
Step 2, be 1: 5-35 to mix in mass ratio by the one package stabilizer in step one and by the soil of heavy metal contamination, stir, Soil conservation is moistening;
Step 3, reaction are after 3-30 days, and the heavy metal ion in contaminated soil is converted into the heavy metal-organic complex of comparatively stable subcarbonate, precipitation of hydroxide thing, phosphate mineral and indissoluble.
Described soil heavy metal combined stablizer, in the passivating method of heavy metal-polluted soil, in described step 2, adds the water of 20%-80%, makes the humidity that Soil conservation is certain by the air-dry quality of soil.
Described soil heavy metal combined stablizer, in the passivating method of heavy metal-polluted soil, comprises the following steps:
Step one, be mixed in proportion with by the soil of heavy metal contamination by carbide slag, stir, 3-14 days is stablized in passivation, maintenance ground moistening;
Step 2, be mixed in proportion by the mixture that calcium superphosphate and step one obtain, stir, 3-14 days is stablized in passivation, keeps soil moisture content identical with step one;
Step 3, the mixture that bacterium slag and step 2 obtain to be mixed in proportion, stir, passivation is stablized, keep soil moisture content identical with step one, the heavy metal ion in contaminated soil is converted into the heavy metal-organic complex of comparatively stable subcarbonate, precipitation of hydroxide thing, phosphate mineral and indissoluble.
Described soil heavy metal combined stablizer, in the passivating method of heavy metal-polluted soil, all adds the water of 20%-80% by the air-dry quality of soil in described step one, step 2 and step 3.
Described soil heavy metal combined stablizer, in the passivating method of heavy metal-polluted soil, adds carbide slag to step 3 from step one and adds bacterium slag to passivation terminates, passivation reaction 7-30 days altogether.
Heavy metal in contaminated soil handled by the present invention is mainly copper, lead, zinc, cadmium.Carry out leaching experiment according to " solid waste Leaching leaching method sulfonitric method " (HJ/T299-2007), cut down according to the concentration of infusion solution heavy metal the stabilization efficiency that degree passes judgment on one package stabilizer heavy metal.Soil environment quality after reparation meets the requirement of country " Hazardous wastes judging standard leaching characteristic identification " (GB5085.3-2007).
Embodiment 1
A kind of heavy metal pollution of soil one package stabilizer, comprises following component, each component by percentage to the quality:
Carbide slag 35%, bacterium slag 57% and calcium superphosphate 8%.
Described soil heavy metal combined stablizer is complete mixed processing method to the passivating method of heavy metal-polluted soil, comprises the following steps:
Step one, carbide slag 17.5g, bacterium slag 28.5g and calcium superphosphate 4g to be mixed, fully stir obtained one package stabilizer;
Step 2, the one package stabilizer 50g in step one to be mixed with the soil 500g by heavy metal contamination, stir, add the water of 40% by the air-dry quality of soil, make the humidity that Soil conservation is certain;
Step 3, reaction are after 7 days, and the heavy metal ion in contaminated soil is converted into the heavy metal-organic complex of comparatively stable subcarbonate, precipitation of hydroxide thing, phosphate mineral and indissoluble.Its Leaching concentration is in table 1.
Toxicity leaching concentration mg/L before and after the passivation of table 1 heavy metal in soil
Embodiment 2
A kind of heavy metal pollution of soil one package stabilizer, comprises following component, each component by percentage to the quality:
Carbide slag 35%, bacterium slag 57% and calcium superphosphate 8%.
Described soil heavy metal combined stablizer, comprises the following steps for separately to add treatment process the passivating method of heavy metal-polluted soil:
Step one, mixed with the soil 500g by heavy metal contamination by carbide slag 17.5g, stir, passivation stablizes 3 days, adds the water of 40%, make the humidity that Soil conservation is certain by the air-dry quality of soil;
Step 2, mixed with the mixture that step one obtains by calcium superphosphate 4g, stir, passivation stablizes 3 days, keeps soil moisture content identical with step one;
Step 3, bacterium slag 28.5g to be mixed with the mixture that step 2 obtains, stir, passivation stablizes 7 days, keep soil moisture content identical with step one, the heavy metal ion in contaminated soil is converted into the heavy metal-organic complex of comparatively stable subcarbonate, precipitation of hydroxide thing, phosphate mineral and indissoluble.Its Leaching concentration is in table 2.
Toxicity leaching concentration mg/L before and after the passivation of table 2 heavy metal in soil
In conjunction with the embodiments 1 and embodiment 2 known, the same proportioning of one package stabilizer (carbide slag: bacterium slag: calcium superphosphate=35: 57: 8), one package stabilizer and contaminated soil mass ratio be when being 1: 10, and different using method, income effect is different.After the complete combination treatment of embodiment 1, the stabilization efficiency of ZINC IN SOIL, copper, lead, cadmium is respectively 91.73%, 99.74%, 99.86%, 89.67%, and after embodiment 2 separately adds process, the stabilization efficiency of zinc, copper, lead, cadmium is respectively 97.56%, 99.83%, 99.98%, 99.31%.Visible, order of adding heavy metal stabilization efficiency has a certain impact, the raw material first added can be combined with heavy metal greatly in soil, and the interference of other raw material simultaneously do not added, therefore the heavy metal stabilization efficiency separately adding process is higher, can more effectively reduce heavy metal-polluted soil Leaching.
Embodiment 3
One package stabilizer different ratio is on the impact of heavy metal-polluted soil stabilization efficiency:
A kind of soil heavy metal combined stablizer, is made up of by different mass per-cent following three kinds of raw materials:
The one package stabilizer of table 3 different ratio
Described soil heavy metal combined stablizer is complete mixed processing method to the passivating method of heavy metal-polluted soil, comprises the following steps:
Step one, carbide slag, bacterium slag and the calcium superphosphate ratio in above-mentioned table 3 to be mixed, fully stir obtained one package stabilizer;
Step 2, the one package stabilizer 55.55g in step one to be mixed with the soil 500g by heavy metal contamination, stir, add the water of 40% by the air-dry quality of soil, make the humidity that Soil conservation is certain;
Step 3, reaction are after 7 days, and the heavy metal ion in contaminated soil is converted into the heavy metal-organic complex of comparatively stable subcarbonate, precipitation of hydroxide thing, phosphate mineral and indissoluble.Its Leaching concentration is in table 4.
The one package stabilizer of table 4 different ratio is to toxicity leaching concentration mg/L before and after heavy metal in soil passivation
As can be seen from Table 4, after one package stabilizer passivation stablizes 7 days, heavy metal toxicity leaching concentration in soil all declines, especially when mass percent carbide slag: bacterium slag: calcium superphosphate=35: time 57: 8 (proportioning 5), the toxicity leaching concentration fall of zinc, copper, lead, cadmium is maximum, stabilization efficiency is respectively 91.12%, 99.78%, 99.90%, 87.88%, and each element all limits lower than toxicity leaching concentration.
Embodiment 4
The impact of one package stabilizer dosage and contaminated soil mass ratio heavy metal stabilization efficiency:
The preparation and application of soil heavy metal combined stablizer is with embodiment 1, complete combination treatment, each constituent mass per-cent carbide slag: bacterium slag: calcium superphosphate=35: 57: 8, soil moisture content 40%, passivation 7 days, other condition is constant, change the ratio of one package stabilizer dosage and contaminated soil quality, one package stabilizer: soil quality=1: 35, 1: 17, 1: 12, when 1: 9, zinc, copper, plumbous, the toxicity leaching concentration of cadmium all declines, in table 5, and along with the increase of one package stabilizer dosage, toxicity leaching concentration fall is larger, the increase of visible one package stabilizer is conducive to zinc, copper, plumbous, the passivation of cadmium is stablized.
Table 5 one package stabilizer dosage heavy metal toxicity leaching concentration affect mg/L
Embodiment 5
The impact of one package stabilizer heavy metal stabilization efficiency under different soils water ratio condition:
The preparation and application of soil heavy metal combined stablizer is with embodiment 1, complete combination treatment, each constituent mass per-cent carbide slag: bacterium slag: calcium superphosphate=35: 57: 8, passivation 7 days, one package stabilizer: soil quality=1: when 9, other condition is constant, change soil moisture content and be respectively 20%, 40%, 60%, 80%, zinc, copper, plumbous, the toxicity leaching concentration of cadmium all declines, in table 6, in the soil moisture content situation of 20%, the leaching concentration of heavy metal is minimum, and along with the increase of soil moisture content, the adsorptive power of the heavy metal ion of soil own declines, the heavy metal ion of dissociating starts to increase, toxicity leaching concentration increases on the contrary.Visible one package stabilizer compare under slightly low soil moisture content condition be conducive to zinc, copper, lead, cadmium passivation stablize.
Table 6 one package stabilizer under different water cut condition heavy metal toxicity leaching concentration affect mg/L
Embodiment 6
Separately add different material in process and add the impact of interval time heavy metal stabilization efficiency:
Get contaminated soil 3 parts and be divided into A, B, C tri-groups, often organize 500g, the each constituent mass per-cent of heavy-metal contaminated soil one package stabilizer is all by carbide slag: bacterium slag: calcium superphosphate=35: 57: 8, one package stabilizer: soil quality=1: 10, soil moisture content maintains 40%, adding of stablizer is carried out by separately adding process, change and different add interval time, namely the timed interval number of days that each passivator adds is respectively 3 days, 7 days, 14 days, timing from adding the first raw material, until the 30th day completes passivation, sampling analysis.
Compared with before passivation, zinc, copper, lead, cadmium toxicity leaching concentration after passivation in 30 days all declines, in table 7, when separately adding process, often kind of raw material is separated by, and within 14 days, to add heavy metal stabilising effect best, and zinc, copper, lead, cadmium stabilization efficiency are respectively 99.31%, 99.98%, 99.89%, 94.87%.Visible heavy metal in soil Leaching concentration presents downtrending along with adding interval time increase, interval time is longer, front a kind of raw material more can and heavy metal there is absorption fully, precipitation, complexing action, be more conducive to zinc, copper, lead, cadmium passivation stable.
What table 7 difference added interval time heavy metal toxicity leaching concentration affects mg/L
Although embodiment of the present invention are open as above, but it is not restricted to listed in specification sheets and embodiment utilization, it can be applied to various applicable the field of the invention completely, for those skilled in the art, can easily realize other amendment, therefore do not deviating under the universal that claim and equivalency range limit, the present invention is not limited to specific details and illustrates here and the legend described.
Claims (10)
1. a soil heavy metal combined stablizer, is characterized in that, comprises following component, each component by percentage to the quality:
Carbide slag 8%-40%, bacterium slag 45%-70% and calcium superphosphate 8%-28%.
2. soil heavy metal combined stablizer as claimed in claim 1, is characterized in that, the mass percent of each component is:
Carbide slag 35%, bacterium slag 57% and calcium superphosphate 8%.
3. soil heavy metal combined stablizer as claimed in claim 2, is characterized in that, described carbide slag is the waste residue after calcium carbide hydrolysis obtains acetylene gas, and main component is calcium hydroxide, and the air-dry grinding of described waste residue rear mistake 10 mesh sieve is for subsequent use.
4. soil heavy metal combined stablizer as claimed in claim 2, is characterized in that, described bacterium slag is the substratum after edible fungus culturing results, after 70-80 DEG C of compost maturity, dry, pulverizes 40 mesh sieves for subsequent use through pulverizer.
5. soil heavy metal combined stablizer as claimed in claim 2, is characterized in that, commercially available phosphate fertilizer selected by described calcium superphosphate, comprises Ca (H
2pO
4)
2h
2o and a small amount of free phosphoric acid, containing the effective P of 14%-20%
2o
5.
6. soil heavy metal combined stablizer as claimed in claim 1 is to the passivating method of heavy metal-polluted soil, it is characterized in that, comprises the following steps:
Step one, carbide slag, bacterium slag, calcium superphosphate to be mixed in proportion, fully to stir obtained one package stabilizer;
Step 2, be 1: 5-35 mix in mass ratio by the one package stabilizer in step one and by the soil of heavy metal contamination, stir, maintenance ground moistening;
Step 3, reaction are after 3-30 days, and the heavy metal ion in contaminated soil is converted into the heavy metal-organic complex of comparatively stable subcarbonate, precipitation of hydroxide thing, phosphate mineral and indissoluble.
7. soil heavy metal combined stablizer as claimed in claim 6 is to the passivating method of heavy metal-polluted soil, it is characterized in that, in described step 2, adds the water of 20%-80%, make the humidity that Soil conservation is certain by the air-dry quality of soil.
8. soil heavy metal combined stablizer as claimed in claim 2 is to the passivating method of heavy metal-polluted soil, it is characterized in that, comprises the following steps:
Step one, be mixed in proportion with by the soil of heavy metal contamination by carbide slag, stir, 3-14 days is stablized in passivation, maintenance ground moistening;
Step 2, be mixed in proportion by the mixture that calcium superphosphate and step one obtain, stir, 3-14 days is stablized in passivation, keeps soil moisture content identical with step one;
Step 3, the mixture that bacterium slag and step 2 obtain to be mixed in proportion, stir, passivation is stablized, keep soil moisture content identical with step one, the heavy metal ion in contaminated soil is converted into the heavy metal-organic complex of comparatively stable subcarbonate, precipitation of hydroxide thing, phosphate mineral and indissoluble.
9. soil heavy metal combined stablizer as claimed in claim 8 is to the passivating method of heavy metal-polluted soil, it is characterized in that, all adds the water of 20%-80% in described step one, step 2 and step 3 by the air-dry quality of soil.
10. soil heavy metal combined stablizer as claimed in claim 9 is to the passivating method of heavy metal-polluted soil, it is characterized in that, adds carbide slag to step 3 add bacterium slag to passivation terminates, passivation reaction 7-30 days altogether from step one.
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|---|---|---|---|
| CN201410486172.4A CN104327858B (en) | 2014-09-22 | 2014-09-22 | A kind of soil heavy metal combined stabilizer and its passivating method to heavy metal-polluted soil |
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| CN201410486172.4A CN104327858B (en) | 2014-09-22 | 2014-09-22 | A kind of soil heavy metal combined stabilizer and its passivating method to heavy metal-polluted soil |
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| CN104327858A true CN104327858A (en) | 2015-02-04 |
| CN104327858B CN104327858B (en) | 2017-09-29 |
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| CN105198511A (en) * | 2015-09-18 | 2015-12-30 | 湖北大学 | Multifunctional organic fertilizer prepared by utilizing tannery sludge and wood fibers and preparation method and application thereof |
| CN105419807A (en) * | 2015-12-17 | 2016-03-23 | 东南大学 | Curing agent for heavy metal and organic matter combined polluted soil, and preparation and application methods for curing agent |
| CN105903756A (en) * | 2016-04-14 | 2016-08-31 | 华南农业大学 | Method for maintaining in-situ chemical improvement effect for acidic multi-metal contaminated soil |
| CN106883855A (en) * | 2017-04-11 | 2017-06-23 | 安徽博硕科技有限公司 | A kind of soil stabilizer and preparation method thereof |
| CN107138516A (en) * | 2017-06-14 | 2017-09-08 | 甘肃华昱环境检测技术服务有限公司 | Mercury contaminated soil renovation agent and its application |
| CN107573191A (en) * | 2017-09-22 | 2018-01-12 | 中国环境科学研究院 | A kind of heavy metal stabilizer for soil ph improvement |
| CN108329082A (en) * | 2017-12-11 | 2018-07-27 | 河南科技学院 | A kind of environmental protection heavy metal-polluted soil stabilizer |
| CN108998041A (en) * | 2018-06-01 | 2018-12-14 | 王玲 | Treatment agent for heavy metal contaminated soil and preparation method thereof |
| CN109702002A (en) * | 2019-01-09 | 2019-05-03 | 甘肃新天亿环保工程有限公司 | A kind of heavy-metal contaminated soil restorative procedure that cold nonirrigated farmland area bacteria residue recycles |
| CN109796988A (en) * | 2019-04-02 | 2019-05-24 | 河北民族师范学院 | The method for producing soil conditioner as raw material using abandoned biomass and carbide slag |
| CN110559594A (en) * | 2019-08-27 | 2019-12-13 | 昆明理工大学 | multi-effect gaseous stabilizer and application thereof in heavy metal stabilization treatment |
| CN111560251A (en) * | 2020-04-23 | 2020-08-21 | 华南师范大学 | Soil conditioner prepared from solid waste and preparation method and application thereof |
| CN111760899A (en) * | 2020-06-22 | 2020-10-13 | 南京农业大学 | Feeding improvement method for repairing toxic organic contaminated soil through oxidant compounding oxidation |
| CN112479333A (en) * | 2020-12-04 | 2021-03-12 | 中国石油天然气股份有限公司 | Heavy metal ion passivation stabilizer for treating residues by using flowback liquid and preparation method |
| CN113861986A (en) * | 2021-11-03 | 2021-12-31 | 贵州省化工研究院 | Method for preparing soil conditioner for passivating heavy metals in soil by taking phosphogypsum as raw material |
| CN114367532A (en) * | 2022-01-12 | 2022-04-19 | 云南农业大学 | Method for improving lead-zinc ore waste land and promoting plant reconstruction by adopting phosphogypsum and bacterial slag |
| CN114918219A (en) * | 2022-04-07 | 2022-08-19 | 云南磷化集团有限公司 | Phosphorus tailings harmless treatment method |
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| CN105198511A (en) * | 2015-09-18 | 2015-12-30 | 湖北大学 | Multifunctional organic fertilizer prepared by utilizing tannery sludge and wood fibers and preparation method and application thereof |
| CN105198511B (en) * | 2015-09-18 | 2018-09-25 | 湖北大学 | A kind of multifunctional organic fertilizer and its preparation method and application using tannery sludge and wood fibre |
| CN105419807A (en) * | 2015-12-17 | 2016-03-23 | 东南大学 | Curing agent for heavy metal and organic matter combined polluted soil, and preparation and application methods for curing agent |
| CN105419807B (en) * | 2015-12-17 | 2018-07-20 | 东南大学 | The curing agent and methods for making and using same of heavy metal and organic compound contaminated soil |
| CN105903756A (en) * | 2016-04-14 | 2016-08-31 | 华南农业大学 | Method for maintaining in-situ chemical improvement effect for acidic multi-metal contaminated soil |
| CN106883855A (en) * | 2017-04-11 | 2017-06-23 | 安徽博硕科技有限公司 | A kind of soil stabilizer and preparation method thereof |
| CN107138516A (en) * | 2017-06-14 | 2017-09-08 | 甘肃华昱环境检测技术服务有限公司 | Mercury contaminated soil renovation agent and its application |
| CN107573191A (en) * | 2017-09-22 | 2018-01-12 | 中国环境科学研究院 | A kind of heavy metal stabilizer for soil ph improvement |
| CN108329082A (en) * | 2017-12-11 | 2018-07-27 | 河南科技学院 | A kind of environmental protection heavy metal-polluted soil stabilizer |
| CN108998041A (en) * | 2018-06-01 | 2018-12-14 | 王玲 | Treatment agent for heavy metal contaminated soil and preparation method thereof |
| CN109702002A (en) * | 2019-01-09 | 2019-05-03 | 甘肃新天亿环保工程有限公司 | A kind of heavy-metal contaminated soil restorative procedure that cold nonirrigated farmland area bacteria residue recycles |
| CN109796988A (en) * | 2019-04-02 | 2019-05-24 | 河北民族师范学院 | The method for producing soil conditioner as raw material using abandoned biomass and carbide slag |
| CN110559594A (en) * | 2019-08-27 | 2019-12-13 | 昆明理工大学 | multi-effect gaseous stabilizer and application thereof in heavy metal stabilization treatment |
| CN111560251A (en) * | 2020-04-23 | 2020-08-21 | 华南师范大学 | Soil conditioner prepared from solid waste and preparation method and application thereof |
| CN111760899A (en) * | 2020-06-22 | 2020-10-13 | 南京农业大学 | Feeding improvement method for repairing toxic organic contaminated soil through oxidant compounding oxidation |
| CN111760899B (en) * | 2020-06-22 | 2021-08-24 | 南京农业大学 | Feeding improvement method for repairing toxic organic contaminated soil through oxidant compounding oxidation |
| CN112479333A (en) * | 2020-12-04 | 2021-03-12 | 中国石油天然气股份有限公司 | Heavy metal ion passivation stabilizer for treating residues by using flowback liquid and preparation method |
| CN112479333B (en) * | 2020-12-04 | 2023-02-28 | 中国石油天然气股份有限公司 | Heavy metal ion passivation stabilizer for treating residues by using flowback liquid and preparation method |
| CN113861986A (en) * | 2021-11-03 | 2021-12-31 | 贵州省化工研究院 | Method for preparing soil conditioner for passivating heavy metals in soil by taking phosphogypsum as raw material |
| CN113861986B (en) * | 2021-11-03 | 2023-12-19 | 贵州省化工研究院 | Method for preparing soil conditioner for passivating heavy metals in soil by taking phosphogypsum as raw material |
| CN114367532A (en) * | 2022-01-12 | 2022-04-19 | 云南农业大学 | Method for improving lead-zinc ore waste land and promoting plant reconstruction by adopting phosphogypsum and bacterial slag |
| CN114918219A (en) * | 2022-04-07 | 2022-08-19 | 云南磷化集团有限公司 | Phosphorus tailings harmless treatment method |
| CN114918219B (en) * | 2022-04-07 | 2024-05-14 | 云南磷化集团有限公司 | Harmless treatment method of phosphate tailings |
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