CN109913223A - A kind of soil-repairing agent and its application method - Google Patents
A kind of soil-repairing agent and its application method Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 21
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 56
- 239000003814 drug Substances 0.000 claims abstract description 49
- 239000002689 soil Substances 0.000 claims abstract description 49
- 229910001385 heavy metal Inorganic materials 0.000 claims abstract description 32
- 238000004458 analytical method Methods 0.000 claims abstract description 29
- 238000002386 leaching Methods 0.000 claims abstract description 13
- 125000001741 organic sulfur group Chemical group 0.000 claims abstract description 13
- 150000001412 amines Chemical class 0.000 claims abstract description 11
- 238000002360 preparation method Methods 0.000 claims abstract description 9
- 229910052751 metal Inorganic materials 0.000 claims abstract description 8
- 239000002184 metal Substances 0.000 claims abstract description 8
- 150000002739 metals Chemical class 0.000 claims abstract description 7
- 238000005527 soil sampling Methods 0.000 claims abstract description 6
- 239000002994 raw material Substances 0.000 claims abstract description 5
- -1 phosphorus compound Chemical class 0.000 claims description 10
- QGJOPFRUJISHPQ-UHFFFAOYSA-N Carbon disulfide Chemical compound S=C=S QGJOPFRUJISHPQ-UHFFFAOYSA-N 0.000 claims description 9
- 238000006243 chemical reaction Methods 0.000 claims description 9
- 150000007524 organic acids Chemical class 0.000 claims description 9
- 229910052698 phosphorus Inorganic materials 0.000 claims description 8
- 239000011574 phosphorus Substances 0.000 claims description 8
- GSFSVEDCYBDIGW-UHFFFAOYSA-N 2-(1,3-benzothiazol-2-yl)-6-chlorophenol Chemical compound OC1=C(Cl)C=CC=C1C1=NC2=CC=CC=C2S1 GSFSVEDCYBDIGW-UHFFFAOYSA-N 0.000 claims description 7
- 239000002253 acid Substances 0.000 claims description 6
- MZGNSEAPZQGJRB-UHFFFAOYSA-N dimethyldithiocarbamic acid Chemical compound CN(C)C(S)=S MZGNSEAPZQGJRB-UHFFFAOYSA-N 0.000 claims description 6
- SEOVTRFCIGRIMH-UHFFFAOYSA-N indole-3-acetic acid Chemical compound C1=CC=C2C(CC(=O)O)=CNC2=C1 SEOVTRFCIGRIMH-UHFFFAOYSA-N 0.000 claims description 6
- DKVNPHBNOWQYFE-UHFFFAOYSA-N carbamodithioic acid Chemical compound NC(S)=S DKVNPHBNOWQYFE-UHFFFAOYSA-N 0.000 claims description 5
- 239000003337 fertilizer Substances 0.000 claims description 5
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 4
- 238000011109 contamination Methods 0.000 claims description 4
- LMBWSYZSUOEYSN-UHFFFAOYSA-N diethyldithiocarbamic acid Chemical compound CCN(CC)C(S)=S LMBWSYZSUOEYSN-UHFFFAOYSA-N 0.000 claims description 4
- 239000012990 dithiocarbamate Substances 0.000 claims description 4
- 229940072033 potash Drugs 0.000 claims description 4
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Substances [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 claims description 4
- 235000015320 potassium carbonate Nutrition 0.000 claims description 4
- 238000012797 qualification Methods 0.000 claims description 4
- UMGDCJDMYOKAJW-UHFFFAOYSA-N thiourea Chemical compound NC(N)=S UMGDCJDMYOKAJW-UHFFFAOYSA-N 0.000 claims description 4
- NYVOYAFUSJONHU-UHFFFAOYSA-K trisodium;1,3,5-triazine-2,4,6-trithiolate Chemical compound [Na+].[Na+].[Na+].[S-]C1=NC([S-])=NC([S-])=N1 NYVOYAFUSJONHU-UHFFFAOYSA-K 0.000 claims description 4
- XSQUKJJJFZCRTK-UHFFFAOYSA-N urea group Chemical group NC(=O)N XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 4
- 239000004202 carbamide Substances 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 238000011084 recovery Methods 0.000 claims description 3
- 238000007873 sieving Methods 0.000 claims description 3
- 239000001488 sodium phosphate Substances 0.000 claims description 3
- PQHYOGIRXOKOEJ-UHFFFAOYSA-N 2-(1,2-dicarboxyethylamino)butanedioic acid Chemical compound OC(=O)CC(C(O)=O)NC(C(O)=O)CC(O)=O PQHYOGIRXOKOEJ-UHFFFAOYSA-N 0.000 claims description 2
- QJZYHAIUNVAGQP-UHFFFAOYSA-N 3-nitrobicyclo[2.2.1]hept-5-ene-2,3-dicarboxylic acid Chemical compound C1C2C=CC1C(C(=O)O)C2(C(O)=O)[N+]([O-])=O QJZYHAIUNVAGQP-UHFFFAOYSA-N 0.000 claims description 2
- CKLJMWTZIZZHCS-REOHCLBHSA-N L-aspartic acid Chemical compound OC(=O)[C@@H](N)CC(O)=O CKLJMWTZIZZHCS-REOHCLBHSA-N 0.000 claims description 2
- 235000003704 aspartic acid Nutrition 0.000 claims description 2
- OQFSQFPPLPISGP-UHFFFAOYSA-N beta-carboxyaspartic acid Natural products OC(=O)C(N)C(C(O)=O)C(O)=O OQFSQFPPLPISGP-UHFFFAOYSA-N 0.000 claims description 2
- 239000001506 calcium phosphate Substances 0.000 claims description 2
- 235000011010 calcium phosphates Nutrition 0.000 claims description 2
- 229940116901 diethyldithiocarbamate Drugs 0.000 claims description 2
- BNIILDVGGAEEIG-UHFFFAOYSA-L disodium hydrogen phosphate Chemical compound [Na+].[Na+].OP([O-])([O-])=O BNIILDVGGAEEIG-UHFFFAOYSA-L 0.000 claims description 2
- 239000004021 humic acid Substances 0.000 claims description 2
- 229910000403 monosodium phosphate Inorganic materials 0.000 claims description 2
- 235000019799 monosodium phosphate Nutrition 0.000 claims description 2
- AJPJDKMHJJGVTQ-UHFFFAOYSA-M sodium dihydrogen phosphate Chemical compound [Na+].OP(O)([O-])=O AJPJDKMHJJGVTQ-UHFFFAOYSA-M 0.000 claims description 2
- QORWJWZARLRLPR-UHFFFAOYSA-H tricalcium bis(phosphate) Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O QORWJWZARLRLPR-UHFFFAOYSA-H 0.000 claims description 2
- BAVYZALUXZFZLV-UHFFFAOYSA-N Methylamine Chemical compound NC BAVYZALUXZFZLV-UHFFFAOYSA-N 0.000 claims 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims 1
- 229910000389 calcium phosphate Inorganic materials 0.000 claims 1
- 239000011591 potassium Substances 0.000 claims 1
- 229910052700 potassium Inorganic materials 0.000 claims 1
- 229910000406 trisodium phosphate Inorganic materials 0.000 claims 1
- 235000019801 trisodium phosphate Nutrition 0.000 claims 1
- SOBHUZYZLFQYFK-UHFFFAOYSA-K trisodium;hydroxy-[[phosphonatomethyl(phosphonomethyl)amino]methyl]phosphinate Chemical compound [Na+].[Na+].[Na+].OP(O)(=O)CN(CP(O)([O-])=O)CP([O-])([O-])=O SOBHUZYZLFQYFK-UHFFFAOYSA-K 0.000 claims 1
- 238000005067 remediation Methods 0.000 abstract description 4
- 229940079593 drug Drugs 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 abstract description 2
- 230000006641 stabilisation Effects 0.000 description 9
- 238000011105 stabilization Methods 0.000 description 8
- ROSDSFDQCJNGOL-UHFFFAOYSA-N Dimethylamine Chemical compound CNC ROSDSFDQCJNGOL-UHFFFAOYSA-N 0.000 description 4
- 239000013522 chelant Substances 0.000 description 4
- 230000008635 plant growth Effects 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- 230000000844 anti-bacterial effect Effects 0.000 description 3
- 230000003750 conditioning effect Effects 0.000 description 3
- 239000002910 solid waste Substances 0.000 description 3
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 229910052785 arsenic Inorganic materials 0.000 description 2
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 2
- 229910052793 cadmium Inorganic materials 0.000 description 2
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 2
- 235000013305 food Nutrition 0.000 description 2
- 239000007952 growth promoter Substances 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 241000040710 Chela Species 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 108010020346 Polyglutamic Acid Proteins 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical group [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- PMUIBVMKQVKHBE-UHFFFAOYSA-N [S].NC(N)=O Chemical compound [S].NC(N)=O PMUIBVMKQVKHBE-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000002738 chelating agent Substances 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 230000000536 complexating effect Effects 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 150000002475 indoles Chemical class 0.000 description 1
- 231100001240 inorganic pollutant Toxicity 0.000 description 1
- 239000012633 leachable Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- UQJQVUOTMVCFHX-UHFFFAOYSA-L nabam Chemical compound [Na+].[Na+].[S-]C(=S)NCCNC([S-])=S UQJQVUOTMVCFHX-UHFFFAOYSA-L 0.000 description 1
- 239000000618 nitrogen fertilizer Substances 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 238000010979 pH adjustment Methods 0.000 description 1
- 229920002643 polyglutamic acid Polymers 0.000 description 1
- 239000001103 potassium chloride Substances 0.000 description 1
- 235000011164 potassium chloride Nutrition 0.000 description 1
- 238000007781 pre-processing Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000009418 renovation Methods 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000003516 soil conditioner Substances 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
- 238000013268 sustained release Methods 0.000 description 1
- 239000012730 sustained-release form Substances 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Abstract
The invention belongs to technical field of soil remediation, disclose a kind of soil-repairing agent, the amine medicament of organic sulfur type medicament including mass parts 30~50 and mass parts 0.2~1.The application method of soil-repairing agent, comprising steps of repairing polluted soil sampling is treated, it is spare after being pre-processed to sample；PH value analysis, total metals concentration analysis, the analysis of heavy metal Ore Leaching and the analysis of heavy metal biological available state are carried out to sample；The adaptable soil-repairing agent component is selected based on the analysis results, and calculates theoretical dosage；Theoretical dosage is used for the sample, then analyzes the reparation validity of the sample.The beneficial effect comprise that the raw material of soil-repairing agent is easy to get, heavy metal-polluted soil removal rate is high, and repairing effect is good；Preparation method is simple, easy to implement；Using when can for the personalization of different soils pollution condition adjust, repair it is with strong points, medication is accurate, without secondary pollution.
Description
Technical field
The present invention relates to technical field of soil remediation, more particularly, to a kind of soil-repairing agent and its application method.
Background technique
With heavy metal than more prominent in soil inorganic pollutant, mainly since heavy metal cannot be by edaphon point
Solution, and is easy to accumulate, and is converted into the bigger methyl compound of toxicity, in addition some by food chain with adverse concentration in human body
Accumulation seriously endangers human health.
Heavy metals in farmland pollutes the reduction for not only resulting in soil degradation, crop yield and quality, and may be by straight
Contact, food chain transmitting etc. threaten human health.Therefore, heavy-metal contaminated soil reparation is the heat of recent domestic concern
Point.
Summary of the invention
It is an object of the invention to propose a kind of soil-repairing agent and its application method, a soil huge sum of money in the prior art is solved
Belong to pollution problem.
To reach above-mentioned technical purpose, technical solution of the present invention provides a kind of soil-repairing agent, including mass parts 30~
50 organic sulfur type medicament and the amine medicament of mass parts 0.2~1；
Wherein, organic sulfur type medicament includes dimethyl dithiocarbamate, diethyldithiocar bamic acid
One or more of salt, urylene dithiocar-bamate and trithiocyanuric acid trisodium salt；The amine medicament includes sulphur
Urea and/or urea.
Technical solution of the present invention also provides a kind of preparation method of soil-repairing agent as previously described, comprising steps of by matter
Measure organic sulfur type medicament of part 30~50, the organic acid type medicament of mass parts 10~30, mass parts 2~10 phosphorus compound medicine
The heteroauxin of agent, the amine medicament of mass parts 0.2~1 and mass parts 0.1~5 is sufficiently mixed to get the soil-repairing agent.
Technical solution of the present invention also provides a kind of application method of soil-repairing agent as previously described, comprising steps of
Repairing polluted soil sampling is treated, it is spare after being pre-processed to sample；
PH value analysis, total metals concentration analysis, the analysis of heavy metal Ore Leaching and heavy metal biological are carried out to sample
Available state analysis；
The adaptable soil-repairing agent component is selected based on the analysis results, and calculates theoretical dosage；
Theoretical dosage is used for the sample, then analyzes the reparation validity of the sample, if result is unqualified,
The soil-repairing agent component or dosage are then adjusted, and analyzes the reparation validity of the sample again, until result qualification；If
As a result qualified, then this soil-repairing agent component and dosage are determined as to the recovery scenario of current contamination soil.
Technical solution of the present invention also provides a kind of preparation method of aforementioned sodium dimethyl dithiocarbamate, including step
It is rapid: raw material liquid alkaline, dimethylamine and carbon disulfide 4:3:5 in mass ratio are continuously passed through in micro passage reaction and are sufficiently mixed,
Middle reaction temperature is 50 DEG C, reacts 80 seconds under 3MPa pressure condition to get the sodium dimethyl dithiocarbamate.
Compared with prior art, the beneficial effect comprise that the raw material of soil-repairing agent is easy to get, heavy metal-polluted soil is gone
Except rate height, repairing effect is good；Preparation method is simple, easy to implement；Using when can be directed to different soils pollution condition personalization tune
Whole, reparation is with strong points, and medication is accurate, without secondary pollution.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to embodiments, to the present invention
It is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to
Limit the present invention.
A kind of soil-repairing agent is present embodiments provided, organic sulfur type medicament and mass parts including mass parts 30~50
0.2~1 amine medicament.
Wherein, organic sulfur type medicament includes dimethyl dithiocarbamate, diethyldithiocar bamic acid
One or more of salt, urylene dithiocar-bamate and trithiocyanuric acid trisodium salt are used as main heavy metal chelating
Agent.Dimethyl dithiocarbamate, its main feature is that reaction is fast, has heavy metal chelating stability, has bactericidal properties, preferably
Sodium dimethyl dithiocarbamate；Diethyldithiocarbamate, its main feature is that reacting relatively fast, heavy metal chelating
Stability is preferable, bactericidal properties are relatively weak；Urylene dithiocar-bamate, its main feature is that reacting relatively fast, heavy metal chela
Close stability preferably, without bactericidal properties；Trithiocyanuric acid trisodium salt, its main feature is that reaction is fast, heavy metal chelating stability is good, environment
Friendly is good, nontoxic, without secondary pollution.
The amine medicament includes thiocarbamide and/or urea, can be used as nitrogenous fertilizer, secondary heavy metal complexing buffer.
The soil-repairing agent further includes potash fertilizer and/or heteroauxin.Preferably, the potash fertilizer includes potassium chloride, is conducive to
Plant growth.The heteroauxin can be used as time heavy metal chelant, PH regulator, soil conditioner and growth promoter.
When this soil-repairing agent is used for basic soil, ingredient further includes organic acid type medicament.The machine acid type medicament packet
Include humic acid, be time heavy metal chelant, PH regulator, its main feature is that reaction at a slow speed, conditioning basic soil PH, basic soil it is living
Property conditioning, can with heavy metal be complexed after delay it is dilute, it is environmentally friendly, soil environment will not be destroyed, it is advantageous to plant growth.In order to make
Soil is more conducive to plant growth, can increase one or more of polyglutamic acid, iminodisuccinic acid and aspartic acid, this
A little organic acid type medicaments can be used as plant growth promoter.
When this soil-repairing agent is used for acid soil, ingredient further includes phosphorus compound medicament.The phosphorus compound medicament
Including one or more of monosodium phosphate, disodium hydrogen phosphate, tertiary sodium phosphate and calcium phosphate, can be used as time heavy metal chelant,
PH regulator, its main feature is that reaction middling speed, conditioning acid soil PH.
The present embodiment provides the preparation methods of soil-repairing agent described before one kind, comprising steps of by mass parts 30~50
Organic sulfur type medicament, the organic acid type medicament of mass parts 10~30, the phosphorus compound medicament of mass parts 2~10, mass parts 0.2~
1 amine medicament and the heteroauxin of mass parts 0.1~5 are sufficiently mixed to get the soil-repairing agent.Period, can will before
Various medicaments are stated to be thoroughly mixed through mechanical mixers.
The present embodiment provides the application methods of soil-repairing agent described before one kind, comprising steps of
Repairing polluted soil sampling is treated, it is spare after being pre-processed to sample；It is described to treat repairing polluted soil sampling
It is sampled including multiple spaced points to Polluted area, sample is the soil away from 0~20cm of earth's surface；The specimen preprocessing
Reason includes adjustment humidity to 25~30%, and sieving for standby；
To sample carry out pH value analysis, total metals concentration analysis, heavy metal Ore Leaching analysis (leachable state) and
The analysis of heavy metal biological available state；
The adaptable soil-repairing agent component is selected based on the analysis results, and calculates theoretical dosage；
Theoretical dosage is used for the sample, then analyzes the reparation validity of the sample, if result is unqualified,
The soil-repairing agent component or dosage are then adjusted, and analyzes the reparation validity of the sample again, until result qualification；If
As a result qualified, then this soil-repairing agent component and dosage are determined as to the recovery scenario of current contamination soil.
Below by taking section (Jiangxi Province's contaminated soil) Heavy Metal Pollution Control of river valley Dexing, Lean as an example, to the above soil
The application method of renovation agent is described in detail.
Firstly, field sampling is carried out to above-mentioned heavy metal pollution place difference Polluted area, including slight pollution area
Take 11 points, intermediate pollution area to take 1 point, amount to 12 points, sample is the soil away from 0~20cm of earth's surface, respectively with S1,
S4, S5, S8, S9, S10, S12, S13, S15, S16, S18, S27 are identified, totally 12 lot sample.Because raining when sampling, sample is wetter,
It air-dries to sample two days later by testing requirements moisture content to 25-30% or so, it is spare after sieving.
PH value analysis is carried out to above 12 batches of samples, details are shown in Table 1:
Table 1
| Batch | S1 | S4 | S5 | S8 | S9 | S10 | S12 | S13 | S15 | S16 | S18 | S27 |
| PH | 5.95 | 5.40 | 5.54 | 6.00 | 5.70 | 5.91 | 5.95 | 6.25 | 6.35 | 5.80 | 5.60 | 6.09 |
Seen from table 1, the weakly acidic scene of Le'an River contaminated soil is obvious, need to do PH adjustment.
Total metals concentration analysis is carried out to above 12 batches of samples, referring to " soil quality lead, Cadmium detrmination graphite furnace are former
Sub- absorptiometry " (GB/T17141-1997) standard to initial soil carry out total metals analysis, determine soil weight
Total metal content situation.The results are shown in Table 2 for the leaching of initial soil total metals,
Table 2
The analysis that heavy metal-polluted soil Ore Leaching is carried out to above 12 batches of samples, according to " solid waste Leaching leaches
Method sulfonitric method " (HJ/T299-2007) carry out leaching analysis to contaminated soil sample, press " surface water environment quality mark
It is quasi- " III grade standard in (GB3838-2002) carries out Contamination Assessment, and testing result is as shown in table 3,
Table 3
To above 12 batches of samples carry out heavy metal-polluted soil biologically effective state analysis, referring to " soil quality Available Lead and
Cadmium detrmination atomic absorption method enters " (GB/T23739-2009), it is extracted using chemical agent, the amount of extraction can preferable mould
For work done in the manner of a certain author object to the degree of absorption of heavy metal in soil, measurement purpose is that the content of biologically effective state in determining soil is decreased obviously
When stabilizer additive amount.The results are shown in Table 4 for analysis,
Table 4
| Lot number | Lead | Cadmium | Copper | Chromium | Arsenic |
| S1 | 19.09 | 0.32 | 19.33 | 0.22 | 0.100 |
| S4 | 18.05 | 0.22 | 18.08 | 0.24 | 0.092 |
| S5 | 19.33 | 0.45 | 32.38 | 0.15 | 0.065 |
| S8 | 20.29 | 0.70 | 47.95 | 0.05 | 0.051 |
| S9 | 21.29 | 0.65 | 36.56 | 0.21 | 0.130 |
| S10 | 20.15 | 0.55 | 35.87 | 0.26 | 0.085 |
| S12 | 18.17 | 0.60 | 37.45 | 0.32 | 0.072 |
| S13 | 20.16 | 0.48 | 36.48 | 0.25 | 0.254 |
| S15 | 19.32 | 0.73 | 30.22 | 0.18 | 0.154 |
| S16 | 18.92 | 0.58 | 28.70 | 0.08 | 0.379 |
| S18 | 19.01 | 0.64 | 29.18 | 0.12 | 0.151 |
| S27 | 19.79 | 0.28 | 12.07 | 0.63 | 0.045 |
Consider that this contaminated soil is faintly acid soil, therefore this medicament scheme uses sustained release scheme, drug dispensing agent in the middle part of medicament
It needs just discharge into soil in acid condition, and is stabilized with heavy metal in soil.
Therefore, this soil-repairing agent selects organic sulfur type medicament, organic acid type medicament, amine medicament, potash fertilizer and indoles
The combination of acetic acid.Heavy metal stabilization mechanism is, dithiocar-bamate structure, sulfydryl organic sulfur structure system all have for
It is coordinated the sulphur atom of lone electron pair, coordinate bond can be formed with the metal ion with unoccupied orbital, form cyclic structure has
The chelate of certain stability slightly solubility.
Agent stability can be seriously affected because arsenic stabilization agent mutually rushes mix preparation with other heavy metal stabilization medicaments,
Therefore this soil remediation, that is, first with this soil-repairing agent purification of heavy metal, recycles its other medicine by the way of successively repairing
Agent individually purifies arsenic.
The contaminated soil sample (determining that moisture content is 20~30%) for weighing certain mass is placed in stabilisation blender, by medicine
Agent accounts for soil (butt) setting ratio and stabilization agent is added, and 3~5min is sufficiently stirred to being uniformly mixed, and sample is packed into certainly
In envelope, envelope is conserved, and (keeps soil moisture content 20~30%) maintenance three days under natural environment after stabilization processes.
It takes and stabilizes after sample is crushed, is sieved according to " solid waste Leaching leaching method sulfonitric method " (HJ/
T299-2007) examination criteria leached, test analysis.It is as shown in table 5 that data are leached after stabilization processes,
Table 5
According to " solid waste Leaching leaching method sulfonitric method " (HJ/T299-2007) to treated soil
Leaching test is carried out, heavy metal concentration river meets in " water environment quality standard " (GB3838-2002) in leachate
The requirement of III grade standard stabilizes analysis of experimental data according to Heavy Metals in Soil Contaminated, for the heavy metal pollution site remediation
Stabilization agent scheme is as follows:
1. slight pollution area this soil-repairing agent adding proportion amount is soil quality than 0.8%, i.e., every 1kg sample need to add
Add this soil-repairing agent of 8.0g, reparation depth is 20cm, and stabilization agent needed for repaired area is 1.6t per acre.
2. intermediate pollution area this soil-repairing agent adding proportion amount is soil quality than 1.0%, i.e., every 1kg sample need to add
Add this soil-repairing agent of 10.0g, reparation depth is 20cm, this soil-repairing agent needed for repaired area is 2.0t per acre.
The present embodiment also provides the dimethyl dithiocarbamic acid in aforementioned soil-repairing agent as organic sulfur type medicament
A kind of preparation method of sodium, comprising steps of raw material liquid alkaline, dimethylamine and carbon disulfide 4:3:5 in mass ratio are continuously passed through micro-
It is sufficiently mixed in channel reactor, wherein reaction temperature is 50 DEG C, reacts 80 seconds under 3MPa pressure condition to get the diformazan
Base nabam.
The above described specific embodiments of the present invention are not intended to limit the scope of the present invention..Any basis
Any other various changes and modifications that technical concept of the invention is made should be included in the guarantor of the claims in the present invention
It protects in range.
Claims (10)
1. a kind of soil-repairing agent, it is characterised in that: organic sulfur type medicament and mass parts 0.2~1 including mass parts 30~50
Amine medicament；
Wherein, organic sulfur type medicament includes dimethyl dithiocarbamate, diethyldithiocarbamate, Asia
One or more of urea groups dithiocar-bamate and trithiocyanuric acid trisodium salt；The amine medicament include thiocarbamide and/
Or urea.
2. soil-repairing agent according to claim 1, it is characterised in that: the dimethyl dithiocarbamate is two
Sodium dimethyldithiocar-bamate (SDDC).
3. soil-repairing agent according to claim 1, it is characterised in that: the soil-repairing agent further include mass parts 10~
30 organic acid type medicament, or, the phosphorus compound medicament of mass parts 2~10；
Wherein, the organic acid type medicament includes humic acid；The phosphorus compound medicament includes monosodium phosphate, disodium hydrogen phosphate, phosphorus
One or more of sour trisodium and calcium phosphate.
4. soil-repairing agent according to claim 3, it is characterised in that: the organic acid type medicament further includes polyglutamic
One or more of acid, iminodisuccinic acid and aspartic acid.
5. soil-repairing agent according to claim 4, it is characterised in that: the soil-repairing agent further includes potash fertilizer, and/
Or, the heteroauxin of mass parts 0.1~5.
6. a kind of preparation method of the soil-repairing agent as described in claim 5 is any, it is characterised in that comprising steps of by mass parts
30~50 organic sulfur type medicament, the organic acid type medicament of mass parts 10~30 or phosphorus compound medicament, the potassium of mass parts 2~10
Fertilizer and/or the amine medicament of mass parts 0.2~1 and the heteroauxin of mass parts 0.1~5 are sufficiently mixed and repair to get the soil
Multiple agent.
7. a kind of application method of soil-repairing agent as claimed in claim 5, it is characterised in that comprising steps of
Repairing polluted soil sampling is treated, it is spare after being pre-processed to sample；
It is effective that pH value analysis, total metals concentration analysis, the analysis of heavy metal Ore Leaching and heavy metal biological are carried out to sample
State analysis；
The adaptable soil-repairing agent component is selected based on the analysis results, and calculates theoretical dosage；
Theoretical dosage is used for the sample, the reparation validity for then analyzing the sample is adjusted if result is unqualified
The whole soil-repairing agent component or dosage, and the reparation validity of the sample is analyzed again, until result qualification；If result
This soil-repairing agent component and dosage are then determined as the recovery scenario of current contamination soil by qualification.
8. application method according to claim 7, it is characterised in that: it is described treat repairing polluted soil sampling include to dirt
Multiple spaced points in dye region are sampled, and sample is the soil away from 0~40cm of earth's surface.
9. application method according to claim 7, it is characterised in that: the sample pretreatment include adjustment humidity to 25~
30%, and sieving for standby.
10. a kind of preparation method of sodium dimethyl dithiocarbamate, it is characterised in that comprising steps of by raw material liquid alkaline, two
Methylamine and carbon disulfide 4:3:5 in mass ratio are continuously passed through in micro passage reaction and are sufficiently mixed, and wherein reaction temperature is 50 DEG C,
80 seconds are reacted under 3MPa pressure condition to get the sodium dimethyl dithiocarbamate.
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