CN104492797B - A kind of restorative procedure of heavy metal pollution acid ground - Google Patents
A kind of restorative procedure of heavy metal pollution acid ground Download PDFInfo
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- CN104492797B CN104492797B CN201410745590.0A CN201410745590A CN104492797B CN 104492797 B CN104492797 B CN 104492797B CN 201410745590 A CN201410745590 A CN 201410745590A CN 104492797 B CN104492797 B CN 104492797B
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Abstract
The invention belongs to soil remediation field, disclose the restorative procedure of a kind of heavy metal pollution acid ground, described method step includes the following: (1) and is mixed with calacareous soil stirring by heavy metal pollution acid ground, stands 2h；(2) add in mixed soil after urea phosphate, chitin, biochemical fulvic acid and alginic acid being mixed, stir；(3), after standing 3h, bacillus cereus Testa oryzae solution left standstill is added.The raw material that the method is used is the most simple and easy to get, and environmentally safe does not results in secondary pollution, is that one deep layer can repair various heavy and environmental friendliness, fast method nondestructive to geobiont character, it is adaptable to commercially produce.
Description
Technical field
The invention belongs to field of environmental technology, relate to the recovery technique of a kind of contaminated soil, be specifically related to a heavy metal species
Pollute the restorative procedure of acid ground.
Background technology
Along with industrialization and the fast development of modernization, heavy metal pollution of soil is to ecological environment and the health of people
Cause serious threat, become one of whole world environmental problem comparing concern.The main source of the pollution of heavy metal-polluted soil is people
For polluting, such as sewage irrigation, motor vehicle exhaust emission, sanitary wastewater discharge, three industrial wastes, the using of agriculture chemical.Heavy metal
In human body poisoned maximum have lead, hydrargyrum, arsenic, cadmium, chromium etc. 5 kinds, these heavy metals can not be decomposed in water, the most malicious after people is edible
Property amplify, other toxin in water are combined the generation bigger Organic substance of toxicity.
The harm of acid ground is a lot, most importantly has a strong impact on the biological activity of soil and the structure of soil, no
It is beneficial to the growth of plant.Additionally, compare at nonacid soil, the relative stability of the heavy metal ion in acid ground difference and
The biological activity of heavy metal ion is high, and this makes in acid ground, and the heavy metal pollution that crops and subsoil water are caused is
For seriously.
For the acid ground of repairing heavy metal pollution, researcher is made that effort, such as application publication number
CN102513349B discloses the chemically composited fixing-biomass coupled repairing method of a kind of cadmium zinc pollution acid ground, makes respectively
Carry out substep by the chemical fixatives of cadmium and zinc to fix, add biomass and strengthen the fixed effect of chemical fixatives and improve soil
Fertility.Other patents also disclose the method for the Phytoremediation of Soils Contaminated by Heavy Metals using non-edible plant.
Summary of the invention
Solve the technical problem that: for the deficiency of the method for different heavy metal pollution acid grounds, such as phytoremediation
The usual root system of method plant used by phytoremediation is the most flourishing, can only carry out soil remediation and the repairing efficiency on top layer
Long, and certain heavy metal species can only be carried out gathering in plant；And chemical restoration owing to easily causing biological property to break to soil
Go bad and cause secondary pollution.In order to improve deficiency, the present invention provides the restorative procedure of a kind of heavy metal pollution acid ground, should
Method is that one deep layer can repair various heavy and environmental friendliness, fast method nondestructive to geobiont character.
Technical scheme: in order to realize the above-mentioned purpose of the present invention, the invention discloses a kind of heavy metal pollution acid ground
Restorative procedure, the step of described method includes the following:
(1) heavy metal pollution acid ground is mixed with calacareous soil stirring, stand 2h.
(2) add in mixed soil after a certain amount of urea phosphate, chitin, biochemical fulvic acid and alginic acid being mixed, stir
Mix uniformly.(3), after standing 3h, after adding bacillus cereus-Testa oryzae solution, a period of time is stood.
Preferably, the restorative procedure of described a kind of heavy metal pollution acid ground, heavy metal-polluted described in step (1)
Dye acid ground is 1:0.1 ~ 1:0.95 with the mass ratio of calacareous soil.
Preferably, the restorative procedure of described a kind of heavy metal pollution acid ground, the urea phosphate described in step (2) is
25-35 part, chitin be 18-25 weight portion, biochemical fulvic acid be 10-20 weight portion, alginic acid is 5-15 weight portion.
Preferably, the restorative procedure of described a kind of heavy metal pollution acid ground, calacareous soil and step in step (1)
Suddenly in (2), the mass ratio of all additive total amounts is 1:0.01 ~ 1:0.1.
Preferably, the restorative procedure of described a kind of heavy metal pollution acid ground, in step (3), bacillus cereus exists in advance
Testa oryzae solution is cultivated.
Further, it is preferred that the restorative procedure of described a kind of heavy metal pollution acid ground, bacillus cereus is that 1 mL is solid
Determine the seed liquor of concentration.
Further, it is preferred that the restorative procedure of described a kind of heavy metal pollution acid ground, Testa oryzae initial concentration solution
For 2-35 g/L.
Further, it is preferred that the restorative procedure of described a kind of heavy metal pollution acid ground, incubation time be 24h ~
72h。
Preferably, the restorative procedure of described a kind of heavy metal pollution acid ground, step (3) middle addition bacillus cereus-
After Testa oryzae solution, time of repose is 2-7 days.
Beneficial effect: the present invention provides the restorative procedure of a kind of heavy metal pollution acid ground, and it is former that the method is used
Expect the most simple and easy to get, environmentally safe, do not result in secondary pollution, be that one deep layer can repair various heavy and environment friend
Good, fast method nondestructive to geobiont character, it is adaptable to commercially produce.
Detailed description of the invention
Below the embodiment of the present invention is described in detail, so that advantages and features of the invention can be easier to by this technology
Personnel understand, thus protection scope of the present invention is made apparent clear and definite defining.
Experimental technique described in following embodiment, if no special instructions, is conventional method；Described reagent and material,
If no special instructions, all can be obtained by commercial channel.
Embodiment 1
Under room temperature, first, it is heavy metal pollution acid ground (labelling 1#, pH 4.0) and the Calx of 1:0.1 in mass ratio
Property mixing with soil stirring stand 2h；Secondly, in mixed soil, add urea phosphate, chitin, biochemical fulvic acid and alginic acid to mix
Compound, this amount of the mixture is 1:0.01 with the mass ratio of calacareous soil, wherein the content of added mixing each component of species
Being respectively as follows: 25 parts of urea phosphates, 18 parts of chitins, 10 parts of biochemical fulvic acids and 5 parts of alginic acid, stirring mixing stands 3h；Finally, add
Entering to cultivate in advance the bacillus cereus Testa oryzae solution of 24h, wherein bacillus cereus is the seed liquor of 1mL fixed concentration, Testa oryzae solution
Concentration is 2 g/L, stands after mix homogeneously.After standing 2 days, heavy metal contaminated soil processes, and passes through Atomic Absorption
Spectrophotometer carries out concentration determination to the heavy metal of the leaching of contaminated soil.
Embodiment 2
Under room temperature, first, it is heavy metal pollution acid ground (labelling 1#, PH 4.0) and the Calx of 1:0.95 in mass ratio
Property mixing with soil stirring stand 2h；Secondly, in mixed soil, add urea phosphate, chitin, biochemical fulvic acid and alginic acid to mix
Compound, this amount of the mixture is 1:0.1 with the mass ratio of calacareous soil, and wherein the content of added mixing each component of species divides
It is not: 35 parts of urea phosphates, 25 parts of chitins, 25 parts of biochemical fulvic acids and 15 parts of alginic acid that stirring mixing stands 3h；Finally, add
Entering to cultivate in advance the bacillus cereus Testa oryzae solution of 72h, wherein bacillus cereus is the seed liquor of 1mL fixed concentration, Testa oryzae solution
Concentration is 35 g/L, stands after mix homogeneously.After standing 7 days, heavy metal contaminated soil processes, and passes through Atomic Absorption
Spectrophotometer carries out concentration determination to the heavy metal of the leaching of contaminated soil.
Embodiment 3
Under room temperature, first, it is heavy metal pollution acid ground (labelling 1#, PH 4.0) and the Calx of 1:0.5 in mass ratio
Property mixing with soil stirring stand 2h；Secondly, in mixed soil, add urea phosphate, chitin, biochemical fulvic acid and alginic acid to mix
Compound, this amount of the mixture is 1:0.5 with the mass ratio of calacareous soil, and wherein the content of added mixing each component of species divides
It is not: 25 parts of urea phosphates, 15 parts of chitins, 15 parts of biochemical fulvic acids and 10 parts of alginic acid that stirring mixing stands 3h；Finally, add
Entering to cultivate in advance the bacillus cereus Testa oryzae solution of 48h, wherein bacillus cereus is the seed liquor of 1mL fixed concentration, Testa oryzae solution
Concentration is 20 g/L, stands after mix homogeneously.After standing 5 days, heavy metal contaminated soil processes, and passes through Atomic Absorption
Spectrophotometer carries out concentration determination to the heavy metal of the leaching of contaminated soil.
Embodiment 4
Under room temperature, first, it is heavy metal pollution acid ground (labelling 2#, PH 4.0) and the Calx of 1:0.8 in mass ratio
Property mixing with soil stirring stand 2h；Secondly, in mixed soil, add urea phosphate, chitin, biochemical fulvic acid and alginic acid to mix
Compound, this amount of the mixture is 1:0.7 with the mass ratio of calacareous soil, and wherein the content of added mixing each component of species divides
It is not: 32 parts of urea phosphates, 18 parts of chitins, 14 parts of biochemical fulvic acids and 15 parts of alginic acid that stirring mixing stands 3h；Finally, add
Entering to cultivate in advance the bacillus cereus Testa oryzae solution of 48h, wherein bacillus cereus is the seed liquor of 1mL fixed concentration, Testa oryzae solution
Concentration is 24 g/L, stands after mix homogeneously.After standing 5 days, heavy metal contaminated soil processes, and passes through Atomic Absorption
Spectrophotometer carries out concentration determination to the heavy metal of the leaching of contaminated soil.
Embodiment 5
Under room temperature, first, it is heavy metal pollution acid ground (labelling 3#, PH 4.0) and the Calx of 1:0.5 in mass ratio
Property mixing with soil stirring stand 2h；Secondly, in mixed soil, add urea phosphate, chitin, biochemical fulvic acid and alginic acid to mix
Compound, this amount of the mixture is 1:0.5 with the mass ratio of calacareous soil, wherein, the content of added mixing each component of species
Being respectively as follows: 25 parts of urea phosphates, 15 parts of chitins, 15 parts of biochemical fulvic acids and 10 parts of alginic acid, stirring mixing stands 3h；Finally,
Adding the bacillus cereus Testa oryzae solution cultivating 48h in advance, wherein bacillus cereus is the seed liquor of 1mL fixed concentration, Testa oryzae solution
Concentration be 20 g/L, after mix homogeneously stand.After standing 5 days, heavy metal contaminated soil processes, and is inhaled by atom
Receive spectrophotometer and the heavy metal of the leaching of contaminated soil is carried out concentration determination.
Comparison example 1
Under room temperature, first, it is heavy metal pollution acid ground (labelling 1#, PH 4.0) and the Calx of 1:0.5 in mass ratio
Property mixing with soil stirring stand 2h；Secondly, in mixed soil, add urea phosphate, chitin, biochemical fulvic acid and alginic acid to mix
Compound, this amount of the mixture is 1:0.5 with the mass ratio of calacareous soil, wherein, the content of added mixing each component of species
Being respectively as follows: 25 parts of urea phosphates, 15 parts of chitins, 15 parts of biochemical fulvic acids and 10 parts of alginic acid, stirring mixing stands 3h.Stand 5
After it, heavy metal contaminated soil processes, by an atomic absorption spectrophotometer huge sum of money to the leaching of contaminated soil
Belong to and carry out concentration determination.
Comparison example 2
Under room temperature, first, be in mass ratio 1:0.25 heavy metal pollution acid ground (labelling 1#, PH 4.0) with mix
Soil adds urea phosphate, chitin, biochemical fulvic acid and alginic acid mixture, wherein the containing of added mixing each component of species
Amount is respectively as follows: 25 parts of urea phosphates, 15 parts of chitins, 15 parts of biochemical fulvic acids and 10 parts of alginic acid, and stirring mixing stands 3h；Its
Secondary, add the bacillus cereus Testa oryzae solution cultivating 48h in advance, wherein bacillus cereus is the seed liquor of 1mL fixed concentration, and Testa oryzae is molten
The concentration of liquid is 20 g/L, stands after mix homogeneously；After standing 5 days, heavy metal contaminated soil processes, and passes through atom
Absorption spectrophotometer carries out concentration determination to the heavy metal of the leaching of contaminated soil.
Comparison example 3
Under room temperature, first, it is heavy metal pollution acid ground (labelling 1#, PH 4.0) and the Calx of 1:0.5 in mass ratio
Property mixing with soil stirring stand 2h；Secondly, adding the bacillus cereus Testa oryzae solution cultivating 48h in advance, wherein bacillus cereus is 1mL
The seed liquor of fixed concentration, the concentration of Testa oryzae solution is 20 g/L, stands after mix homogeneously.After standing 5 days, heavy metal is polluted
Soil process, by atomic absorption spectrophotometer, the heavy metal of the leaching of contaminated soil is carried out concentration determination.
The heavy metal initial content of one or three kinds of contaminated soils of table
| Project | Cadmium (Cd) | Chromium (Cr) | Lead (Pb) |
| Soil (labelling 1#) | 9.8 mg/kg | 342.4 mg/kg | 420.6 mg/kg |
| Soil (labelling 2#) | 15.5 mg/kg | 467.3 mg/kg | 572.3 mg/kg |
| Soil (labelling 3#) | 23.9 mg/kg | 530.8 mg/kg | 654.8 mg/kg |
The content that in table two example 1-5, after repair process, heavy metal is final
| Project | Soil is numbered | Cadmium (Cd) | Chromium (Cr) | Lead (Pb) |
| Example 1 | Soil (labelling 1#) | 0.3 mg/kg | 16.7 mg/kg | 13.2 mg/kg |
| Example 2 | Soil (labelling 1#) | 0.2 mg/kg | 8.4 mg/kg | 6.9 mg/kg |
| Example 3 | Soil (labelling 1#) | 0.1 mg/kg | 10.8 mg/kg | 9.3 mg/kg |
| Example 4 | Soil (labelling 2#) | 0.4 mg/kg | 13.1 mg/kg | 11.5 mg/kg |
| Example 5 | Soil (labelling 3#) | 0.6 mg/kg | 19.8 mg/kg | 14.7 mg/kg |
The content that after repair process in table three comparison example 1-3, heavy metal is final
| Project | Cadmium (Cd) | Chromium (Cr) | Lead (Pb) |
| Comparison example 1 | 6.5 mg/kg | 176.7 mg/kg | 144.9 mg/kg |
| Comparison example 2 | 4.8 mg/kg | 132.5 mg/kg | 121.6 mg/kg |
| Comparison example 3 | 5.7 mg/kg | 184.3 mg/kg | 207.8 mg/kg |
From table one and table two result, the heavy metal pollution acid ground restorative procedure heavy metal cadmium used, chromium
And lead is all effective, heavy metal content cadmium (≤23.9 mg/kg), chromium (≤530.8 mg/kg) and lead (≤654.8 mg/kg)
Soil can get good repairing effect.From the comparison example of table three, in method used in the present invention: step
(1) lime soil in, urea phosphate, chitin, biochemical fulvic acid and the alginic acid mixture in step (2), and step
(3) the bacillus cereus Testa oryzae solution in, three is the most indispensable, there is cooperative effect between three, has jointly cooperated to acid
The reparation of property heavy metal-polluted soil.
Claims (8)
1. the restorative procedure of a heavy metal pollution acid ground, it is characterised in that described method step includes the following:
(1) heavy metal pollution acid ground is mixed with calacareous soil stirring, stand 2h；
(2) add in mixed soil after urea phosphate, chitin, biochemical fulvic acid and alginic acid being mixed, stir；
(3), after standing 3h, bacillus cereus-Testa oryzae solution left standstill is added；
Urea phosphate described in step (2) be 25-35 weight portion, chitin be 18-25 weight portion, biochemical fulvic acid be 10-20
Weight portion, alginic acid is 5-15 weight portion.
The restorative procedure of a kind of heavy metal pollution acid ground the most according to claim 1, it is characterised in that step (1)
Described in the mass ratio of heavy metal pollution acid ground and calacareous soil be 1:0.1 ~ 1:0.95.
The restorative procedure of a kind of heavy metal pollution acid ground the most according to claim 1, it is characterised in that step (1)
Middle calacareous soil is 1:0.05 ~ 1:1.4 with the mass ratio of all additive total amounts in step (2).
The restorative procedure of a kind of heavy metal pollution acid ground the most according to claim 1, it is characterised in that step (3)
Middle bacillus cereus is cultivated in advance in Testa oryzae solution.
The restorative procedure of a kind of heavy metal pollution acid ground the most according to claim 4, it is characterised in that bacillus cereus
It it is the seed liquor of 1 mL fixed concentration.
The restorative procedure of a kind of heavy metal pollution acid ground the most according to claim 4, it is characterised in that Testa oryzae solution
Initial concentration is 2-35 g/L.
The restorative procedure of a kind of heavy metal pollution acid ground the most according to claim 4, it is characterised in that incubation time
For 24h ~ 72h.
The restorative procedure of a kind of heavy metal pollution acid ground the most according to claim 1, it is characterised in that step (3)
After middle addition bacillus cereus-Testa oryzae solution, time of repose is 2-7 days.
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| CN105583217A (en) * | 2015-12-23 | 2016-05-18 | 江苏盖亚环境工程有限公司 | Conditioner for repairing heavy metal contaminated soil and preparing method for conditioner |
| CN107088576B (en) * | 2016-02-17 | 2020-05-29 | 北京飞鹰绿地科技发展有限公司 | Method for improving acid soil |
| CN105964672A (en) * | 2016-03-17 | 2016-09-28 | 凤阳徽亨商贸有限公司 | Environmental friendly soil heavy metal restoration agent |
| CN106398703A (en) * | 2016-08-19 | 2017-02-15 | 湖南凯天重金属污染治理工程有限公司 | Technology for in-situ remediation of cadmium mildly/moderately polluted paddy fields |
| CN107880899A (en) * | 2017-11-15 | 2018-04-06 | 吴梅丽 | The renovation agent of a kind of acid soil and heavy-metal contaminated soil and its preparation |
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| CN101602060A (en) * | 2009-07-03 | 2009-12-16 | 中南大学 | A kind of repairing method of microorganism in contaminated soil of chromium slag storage yard |
| CN101716591B (en) * | 2009-12-08 | 2011-05-11 | 湖南省土壤肥料研究所 | Passivating method for reducing bioavailability of cadmium of acidic cadmium polluted soil |
| US8734560B2 (en) * | 2010-09-10 | 2014-05-27 | Harsco Corporation | Agricultural blend and process of forming an agricultural blend |
| CN102174325B (en) * | 2011-03-11 | 2012-06-27 | 中国科学院亚热带农业生态研究所 | Composite passivant for soil polluted by heavy metal and preparation method |
| CN102513349B (en) * | 2011-12-22 | 2014-04-09 | 中南大学 | Chemical fixation-biomass improvement coupled repairing method of cadmium zinc combined polluted acidic soil |
| CN103143556B (en) * | 2013-02-07 | 2015-06-17 | 广东省农业科学院农业资源与环境研究所 | Passivating agent for reducing cadmium activity of acidic vegetable soil and use method thereof |
| CN103495600A (en) * | 2013-09-30 | 2014-01-08 | 桂林理工大学 | Method for repairing acid heavy metal contaminated soil |
| CN104117529B (en) * | 2014-07-09 | 2016-03-23 | 华南师范大学 | A kind of in-situ remediation method containing heavy metal acid ground |
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