CN115521790A - Preparation method of soil remediation agent - Google Patents
Preparation method of soil remediation agent Download PDFInfo
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- CN115521790A CN115521790A CN202211208468.0A CN202211208468A CN115521790A CN 115521790 A CN115521790 A CN 115521790A CN 202211208468 A CN202211208468 A CN 202211208468A CN 115521790 A CN115521790 A CN 115521790A
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- 239000003795 chemical substances by application Substances 0.000 title claims abstract description 84
- 238000005067 remediation Methods 0.000 title claims abstract description 74
- 238000002360 preparation method Methods 0.000 title abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 56
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 claims abstract description 44
- 235000001727 glucose Nutrition 0.000 claims abstract description 43
- 239000008103 glucose Substances 0.000 claims abstract description 43
- WQZGKKKJIJFFOK-VFUOTHLCSA-N beta-D-glucose Chemical compound OC[C@H]1O[C@@H](O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-VFUOTHLCSA-N 0.000 claims abstract description 41
- HELHAJAZNSDZJO-OLXYHTOASA-L sodium L-tartrate Chemical compound [Na+].[Na+].[O-]C(=O)[C@H](O)[C@@H](O)C([O-])=O HELHAJAZNSDZJO-OLXYHTOASA-L 0.000 claims abstract description 38
- 239000001433 sodium tartrate Substances 0.000 claims abstract description 38
- 229960002167 sodium tartrate Drugs 0.000 claims abstract description 38
- 235000011004 sodium tartrates Nutrition 0.000 claims abstract description 38
- 239000008367 deionised water Substances 0.000 claims abstract description 33
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 33
- SURQXAFEQWPFPV-UHFFFAOYSA-L iron(2+) sulfate heptahydrate Chemical compound O.O.O.O.O.O.O.[Fe+2].[O-]S([O-])(=O)=O SURQXAFEQWPFPV-UHFFFAOYSA-L 0.000 claims abstract description 32
- 238000010438 heat treatment Methods 0.000 claims abstract description 26
- 238000000034 method Methods 0.000 claims abstract description 24
- 239000002994 raw material Substances 0.000 claims abstract description 21
- 239000011259 mixed solution Substances 0.000 claims abstract description 17
- 238000002156 mixing Methods 0.000 claims abstract description 11
- 238000003756 stirring Methods 0.000 claims abstract description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 39
- 238000001816 cooling Methods 0.000 claims description 7
- 238000001035 drying Methods 0.000 claims description 7
- 238000004140 cleaning Methods 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 3
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- 230000015556 catabolic process Effects 0.000 abstract description 16
- 238000006731 degradation reaction Methods 0.000 abstract description 16
- 230000014759 maintenance of location Effects 0.000 abstract description 6
- 230000002035 prolonged effect Effects 0.000 abstract description 6
- 238000006555 catalytic reaction Methods 0.000 abstract description 3
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- 239000013078 crystal Substances 0.000 description 7
- 239000000243 solution Substances 0.000 description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 6
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- FEWJPZIEWOKRBE-UHFFFAOYSA-N Tartaric acid Natural products [H+].[H+].[O-]C(=O)C(O)C(O)C([O-])=O FEWJPZIEWOKRBE-UHFFFAOYSA-N 0.000 description 4
- 239000012535 impurity Substances 0.000 description 4
- 235000002906 tartaric acid Nutrition 0.000 description 4
- 239000011975 tartaric acid Substances 0.000 description 4
- 229910021642 ultra pure water Inorganic materials 0.000 description 4
- 239000012498 ultrapure water Substances 0.000 description 4
- 238000002425 crystallisation Methods 0.000 description 3
- 230000008025 crystallization Effects 0.000 description 3
- 239000011790 ferrous sulphate Substances 0.000 description 3
- 235000003891 ferrous sulphate Nutrition 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 229910000359 iron(II) sulfate Inorganic materials 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 150000002894 organic compounds Chemical class 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000001223 reverse osmosis Methods 0.000 description 3
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- 238000005406 washing Methods 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 229920002472 Starch Polymers 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 150000001720 carbohydrates Chemical class 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 238000004821 distillation Methods 0.000 description 2
- 238000009296 electrodeionization Methods 0.000 description 2
- 239000000706 filtrate Substances 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
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- 238000012986 modification Methods 0.000 description 2
- 150000002772 monosaccharides Chemical class 0.000 description 2
- 235000019698 starch Nutrition 0.000 description 2
- 239000008107 starch Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 description 1
- 102000013142 Amylases Human genes 0.000 description 1
- 108010065511 Amylases Proteins 0.000 description 1
- 229920002261 Corn starch Polymers 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- 102000004190 Enzymes Human genes 0.000 description 1
- 108090000790 Enzymes Proteins 0.000 description 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- VTLYFUHAOXGGBS-UHFFFAOYSA-N Fe3+ Chemical compound [Fe+3] VTLYFUHAOXGGBS-UHFFFAOYSA-N 0.000 description 1
- XYQRXRFVKUPBQN-UHFFFAOYSA-L Sodium carbonate decahydrate Chemical compound O.O.O.O.O.O.O.O.O.O.[Na+].[Na+].[O-]C([O-])=O XYQRXRFVKUPBQN-UHFFFAOYSA-L 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910000746 Structural steel Inorganic materials 0.000 description 1
- YKTSYUJCYHOUJP-UHFFFAOYSA-N [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] Chemical compound [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] YKTSYUJCYHOUJP-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 150000001299 aldehydes Chemical class 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000008120 corn starch Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 239000008121 dextrose Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229940111205 diastase Drugs 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229940088598 enzyme Drugs 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- 230000003301 hydrolyzing effect Effects 0.000 description 1
- 229910017053 inorganic salt Inorganic materials 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 239000003456 ion exchange resin Substances 0.000 description 1
- 229920003303 ion-exchange polymer Polymers 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- RUTXIHLAWFEWGM-UHFFFAOYSA-H iron(3+) sulfate Chemical compound [Fe+3].[Fe+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O RUTXIHLAWFEWGM-UHFFFAOYSA-H 0.000 description 1
- GDPKWKCLDUOTMP-UHFFFAOYSA-B iron(3+);dihydroxide;pentasulfate Chemical compound [OH-].[OH-].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O GDPKWKCLDUOTMP-UHFFFAOYSA-B 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 229910000360 iron(III) sulfate Inorganic materials 0.000 description 1
- YDZQQRWRVYGNER-UHFFFAOYSA-N iron;titanium;trihydrate Chemical compound O.O.O.[Ti].[Fe] YDZQQRWRVYGNER-UHFFFAOYSA-N 0.000 description 1
- 238000003973 irrigation Methods 0.000 description 1
- 230000002262 irrigation Effects 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 230000003472 neutralizing effect Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229940001593 sodium carbonate Drugs 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 229940018038 sodium carbonate decahydrate Drugs 0.000 description 1
- LLVQEXSQFBTIRD-UHFFFAOYSA-M sodium;2,3,4-trihydroxy-4-oxobutanoate;hydrate Chemical compound O.[Na+].OC(=O)C(O)C(O)C([O-])=O LLVQEXSQFBTIRD-UHFFFAOYSA-M 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
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- 235000000346 sugar Nutrition 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
Images
Classifications
-
- 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
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
- Engineering & Computer Science (AREA)
- Inorganic Chemistry (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The present disclosure provides a method for preparing a soil remediation agent, comprising: obtaining sodium tartrate, glucose and ferrous sulfate heptahydrate; mixing sodium tartrate, glucose and ferrous sulfate heptahydrate according to a weight ratio to obtain a raw material; dissolving the raw materials in deionized water and continuously stirring for the first time to obtain a mixed solution; heating the mixed solution at a first temperature for a second time to obtain gel; and heating the gel at a second temperature for a third time to obtain the soil remediation agent. According to the preparation method of the soil remediation agent, the soil remediation agent can degrade the polycyclic aromatic hydrocarbon under the catalysis of light, and meanwhile, the soil remediation agent is convenient to store and carry, the retention time of the soil remediation agent in the soil is greatly prolonged, and the degradation efficiency of the soil remediation agent on the polycyclic aromatic hydrocarbon is effectively improved.
Description
Technical Field
The disclosure relates to the technical field of soil remediation, in particular to a preparation method of a soil remediation agent.
Background
Due to the fact that a large amount of polycyclic aromatic hydrocarbon enters soil due to atmospheric sedimentation, sewage irrigation, solid waste landfill leakage and the like, and due to the fact that the polycyclic aromatic hydrocarbon is poor in water solubility and is easily adsorbed on soil particles, the polycyclic aromatic hydrocarbon becomes typical toxic organic pollutants in the soil, the soil with the polycyclic aromatic hydrocarbon can directly or indirectly cause damage to human bodies, and therefore it is very important to repair the soil polluted by the polycyclic aromatic hydrocarbon. The polycyclic aromatic hydrocarbon in the soil is difficult to economically and efficiently remove by the current soil remediation processes such as bioremediation, physical and chemical remediation, combined chemical and biological remediation and the like.
Disclosure of Invention
The present disclosure is directed to solving, at least in part, one of the technical problems in the related art.
Therefore, the invention aims to provide a preparation method of the soil remediation agent.
In order to achieve the above object, the present disclosure provides a method for preparing a soil remediation agent, comprising: obtaining sodium tartrate, glucose and ferrous sulfate heptahydrate; mixing the sodium tartrate, the glucose and the ferrous sulfate heptahydrate according to a weight ratio to obtain a raw material; dissolving the raw materials in deionized water and continuously stirring for the first time to obtain a mixed solution; heating the mixed solution at a first temperature for a second time to obtain gel; and heating the gel at a second temperature for a third time to obtain the soil remediation agent.
Optionally, the sodium tartrate, the glucose and the ferrous sulfate heptahydrate are mixed according to a weight ratio to obtain a raw material comprising: obtaining 1.7 grams to 2.5 grams of the sodium tartrate as a first component; obtaining 0.3 g to 0.6 g of said glucose as a second component; obtaining 1.8 grams to 2.3 grams of the ferrous sulfate heptahydrate as a third component; mixing the first component, the second component and the third component to obtain the raw material.
Optionally, the deionized water is 18 ml to 23 ml, and the first time is 17 minutes to 24 minutes.
Optionally, the first temperature is 90-110 degrees and the second time is 8-12 hours.
Optionally, the second temperature is 330 degrees to 360 degrees, and the third time is 2.7 hours to 3.1 hours.
Optionally, heating the mixed solution at the first temperature includes: placing the mixed solution in an oven; the temperature of the oven was adjusted to the first temperature.
Optionally, the heating the gel at the second temperature comprises: placing the gel in a muffle furnace; adjusting the temperature of the muffle furnace to the second temperature.
Optionally, after the gel is heated at the second temperature for a third time to obtain the soil remediation agent, the preparation method further comprises: cooling the soil remediation agent to a third temperature; alternately cleaning the soil remediation agent for multiple times by using deionized water and ethanol; and drying the soil remediation agent under vacuum at a fourth temperature for a fourth time.
Optionally, the fourth temperature is 75 to 93 degrees, and the fourth time is 10 to 13 hours.
Optionally, the third temperature is 17-28 ℃, and the soil remediation agent is alternately cleaned by deionized water and ethanol for 4-7 times.
The technical scheme provided by the disclosure can comprise the following beneficial effects:
the method is characterized in that a mixture of sodium tartrate, glucose and ferrous sulfate heptahydrate is used as a raw material, so that the gel is easy to be carbonized at low temperature, the soil remediation agent can degrade the polycyclic aromatic hydrocarbon under the catalysis of light, and meanwhile, the raw material is dissolved in deionized water and heated into the gel, so that the soil remediation agent can form a solid structure, the soil remediation agent is convenient to store and carry, the retention time of the soil remediation agent in the soil is greatly prolonged, and the degradation efficiency of the soil remediation agent on the polycyclic aromatic hydrocarbon is effectively improved.
Additional aspects and advantages of the disclosure will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the disclosure.
Drawings
The foregoing and/or additional aspects and advantages of the present disclosure will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic structural diagram of a method for preparing a soil remediation agent according to an embodiment of the present disclosure.
Detailed Description
Reference will now be made in detail to the embodiments of the present disclosure, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of illustrating the present disclosure and should not be construed as limiting the same. On the contrary, the embodiments of the disclosure include all changes, modifications and equivalents coming within the spirit and terms of the claims appended hereto.
As shown in fig. 1, the disclosed embodiment provides a method for preparing a soil remediation agent, comprising:
s1: obtaining sodium tartrate, glucose and ferrous sulfate heptahydrate;
s2: mixing sodium tartrate, glucose and ferrous sulfate heptahydrate according to a weight ratio to obtain a raw material;
s3: dissolving the raw materials in deionized water and continuously stirring for the first time to obtain a mixed solution;
s4: heating the mixed solution at a first temperature for a second time to obtain gel;
s5: and heating the gel at a second temperature for a third time to obtain the soil remediation agent.
The method has the advantages that the mixture of the sodium tartrate, the glucose and the ferrous sulfate heptahydrate is used as the raw material, so that the gel is easy to be carbonized at low temperature, the soil remediation agent can degrade the polycyclic aromatic hydrocarbon under the catalysis of light, and meanwhile, the raw material is dissolved in deionized water and heated into the gel, so that the soil remediation agent can form a solid structure, the soil remediation agent is convenient to store and carry, the retention time of the soil remediation agent in the soil is greatly prolonged, and the degradation efficiency of the soil remediation agent on the polycyclic aromatic hydrocarbon is effectively improved.
It is noted that sodium tartrate is an organic compound having the formula C 4 H 4 Na 2 O 6 Sodium tartrate is transparent colorless prismatic crystal or white crystalline powder, has slight hygroscopicity in air, is dissolved in water, has levorotatory property and is neutral, has pH of 7-9, is insoluble in ethanol and diethyl ether, loses crystal water at 120 deg.C, and is decomposed by heating. Sodium tartrate gives off smell of sugar burning when burned, and residues of the sodium tartrate are strong in alkalinity and generate foam when meeting acid.
The sodium tartrate preparation method comprises the following steps of (1) heating tartaric acid dissolved in water, neutralizing with sodium carbonate or sodium hydroxide, and finally concentrating and crystallizing to obtain sodium tartrate or separating out crystals with ethanol to obtain sodium tartrate; dissolving tartaric acid and an equal molar amount of sodium hydroxide in water and cooling the mixed solution, or adding an equal molar amount of tartaric acid to a solution of sodium tartrate and cooling the solution. Adding ethanol if necessary to obtain sodium hydrogen tartrate monohydrate; dissolving tartaric acid in water, heating, adding sodium carbonate decahydrate for neutralization and filtration, concentrating the filtrate, gradually cooling under stirring, carrying out suction filtration crystallization, washing with water, and finally drying at room temperature to obtain the pure sodium tartrate.
Glucose is an organic compound of formula C 6 H 12 O 6 Glucose is a monosaccharide which is the most widely distributed and important monosaccharide in the nature, and is polyhydroxy aldehyde, pure glucose is colorless crystals, is easily soluble in water and slightly soluble in ethanol but insoluble in diethyl ether, and a natural glucose solution rotates to the right, so that the glucose belongs to dextrose.
The glucose obtaining mode can be set according to actual needs, for example, edible corn starch is partially hydrolyzed by food-grade acid and/or enzyme to obtain a saccharide aqueous solution, and the saccharide aqueous solution is purified and concentrated to obtain glucose; hydrolyzing starch with hydrochloric acid or dilute sulfuric acid to obtain glucose; and obtaining glucose from the starch under the action of diastase.
Ferrous sulfate heptahydrate is an inorganic salt of the formula FeSO 4 ·7H 2 O, the ferrous sulfate heptahydrate is monoclinic crystal, the crystal is in a short column shape, a thick plate shape, a fine particle shape or a fiber shape, the aggregate is in a granular block shape, a fiber radial block shape or a skin shell or a coating, the ferrous sulfate heptahydrate is easily soluble in water but insoluble in ethanol, and the ferrous sulfate heptahydrate is weathered in dry air and is easily oxidized into brown yellow basic ferric sulfate in humid air.
The obtaining mode of the ferrous sulfate heptahydrate can be set according to actual needs, for example, scrap iron is dissolved in sulfuric acid and heated until the scrap iron is not dissolved, the solution is filtered and acidified by sulfuric acid, then cooled, then hydrogen sulfide is introduced to saturation after cooling, the solution is kept stand for 2 to 3 days, then the solution is heated on a water bath and filtered, filtrate is poured into a distillation flask, carbon dioxide without oxygen is introduced into the distillation flask, crystallization is carried out in carbon dioxide after half of the solution is evaporated, then the crystals are sucked and filtered out, water washing and ethanol washing are carried out, and finally drying is carried out at 30 ℃ to obtain the ferrous sulfate; when the ilmenite is decomposed into titanium dioxide by sulfuric acid, ferrous sulfate and ferric sulfate are generated during the decomposition, ferric iron is reduced into ferrous iron by iron wires, and the ferrous sulfate is obtained through freezing crystallization.
When the sodium tartrate, the glucose and the ferrous sulfate heptahydrate are mixed according to the weight ratio, the mixing sequence of the sodium tartrate, the glucose and the ferrous sulfate heptahydrate can be set according to actual needs, and is not limited to this, meanwhile, the mixing container of the sodium tartrate, the glucose and the ferrous sulfate heptahydrate can be set according to actual needs, and the container can be a test tube, a glass cup and the like.
Deionized water refers to pure water from which impurities in the form of ions are removed, and the acquisition mode of the deionized water can be set according to actual needs, for example, deionized water is prepared by ion exchange resin: sequentially passing raw water through a raw water filter, a multi-media filter, an activated carbon filter, a precision filter, a positive bed, a negative bed, a mixed bed and a post-cartridge filter to obtain deionized water; preparing deionized water by reverse osmosis-ion exchange equipment: sequentially passing raw water through a multi-media filter, an activated carbon filter, a precision filter, a reverse osmosis device, a mixed bed, an ultrapure water tank, an ultrapure water pump and a rear cartridge filter to obtain deionized water; preparing deionized water by matching reverse osmosis equipment and electrodeionization equipment: the raw water sequentially passes through a multimedia filter, an activated carbon filter, a precision filter, a reverse osmosis device, an electrodeionization device, an ultrapure water tank, an ultrapure water pump and a rear cartridge filter to obtain the deionized water.
The container of deionized water can be set according to actual needs, and the container can be a test tube, a glass cup and the like.
The soil repairing agent can be set into granules when in use, and the granularity modulus of the soil repairing agent is set according to different soils, so that the soil repairing agent has the optimal degradation effect on polycyclic aromatic hydrocarbons.
In some embodiments, in S2, sodium tartrate, glucose and ferrous sulfate heptahydrate are mixed in a weight ratio to obtain a starting material comprising:
s21: obtaining 1.7 g-2.5 g of sodium tartrate as a first component;
s22: obtaining 0.3 g to 0.6 g of glucose as a second component;
s23: obtaining 1.8 g-2.3 g of ferrous sulfate heptahydrate as a third component;
s24: and mixing the first component, the second component and the third component to obtain the raw material.
It can be understood that sodium tartrate, glucose and ferrous sulfate heptahydrate are mixed according to the weight ratio of nearly 4. Therefore, the degradation efficiency of the soil remediation agent on the polycyclic aromatic hydrocarbon is effectively improved.
The weight of the sodium tartrate may be set according to actual needs, and the weight of the sodium tartrate may be, for example, 1.7 g, 1.8 g, 2 g, 2.3 g, 2.4 g, 2.5 g, or the like.
The weight of the glucose can be set according to actual needs, and the weight of the glucose can be 0.3 g, 0.4 g, 0.5 g, 0.6 g, and the like.
The weight of the ferrous sulfate heptahydrate can be set according to actual needs, and the weight of the ferrous sulfate heptahydrate can be 1.8 g, 2 g, 2.1 g, 2.2 g, 2.3 g and the like.
Wherein, preferably, the weight of the sodium tartrate is 2 g, the weight of the glucose is 0.5 g, and the weight of the glucose is 2 g, so that the weight ratio of the sodium tartrate, the glucose and the ferrous sulfate heptahydrate is 4.
In some embodiments, the deionized water is 18 ml to 23 ml and the first time is 17 minutes to 24 minutes.
It can be understood that the raw materials are dissolved in the deionized water, so that the ionic impurities in the water are prevented from reacting with the raw materials, the influence of external factors on the preparation process of the soil remediation agent is effectively reduced, the deionized water is set to be 18-23 ml, and the first time is set to be 17-24 minutes, so that the raw materials can be fully dissolved in the deionized water, more uniform and stable mixing reaction among the sodium tartrate, the glucose and the ferrous sulfate heptahydrate can be realized, and the high-efficiency degradation of the soil remediation agent on the polycyclic aromatic hydrocarbon in the soil is ensured.
It should be noted that the volume of the deionized water can be set according to actual needs, and for example, the volume of the deionized water can be 18 ml, 19 ml, 20 ml, 22 ml, 23 ml, and the like.
The first time is the stirring time after the raw materials are dissolved in the deionized water, and the value of the first time can be set according to actual needs, for example, the first time can be 17 minutes, 18 minutes, 20 minutes, 21 minutes, 24 minutes, and the like.
Among them, it is preferable that when the weight of sodium tartrate is 2 g, the weight of glucose is 0.5 g and the weight of glucose is 2 g, the volume of deionized water is 20 ml and the first time is 20 minutes.
In some embodiments, the first temperature is 90 degrees to 110 degrees and the second time is 8 hours to 12 hours.
The method has the advantages that the mixed solution is continuously heated at the first temperature for the second time, so that water in the mixed solution can be fully evaporated to obtain gel, and the finally obtained soil remediation agent is in a solid structure, so that the soil remediation agent is convenient to store and carry, the retention time of the soil remediation agent in the soil is greatly prolonged, and the degradation efficiency of the soil remediation agent on the polycyclic aromatic hydrocarbon is effectively improved.
Wherein, through the arrangement of 90-110 ℃ and 8-12 hours, the water in the mixed solution can be fully evaporated, meanwhile, the structure of the components in the mixed solution is prevented from being damaged, and the high-efficiency degradation of the polycyclic aromatic hydrocarbon by the soil remediation agent is ensured.
The first temperature is a heating temperature of the mixed liquid, and a value of the first temperature may be set according to actual needs, and the first temperature may be, for example, 90 degrees, 93 degrees, 97 degrees, 100 degrees, 101 degrees, 106 degrees, 110 degrees, or the like.
The second time is a heating time of the mixed liquid, and a value of the second time may be set according to actual needs, for example, the second time may be 8 hours, 8.7 hours, 9 hours, 9.3 hours, 10 hours, 10.4 hours, 11 hours, 12 hours, and the like.
Among them, it is preferable that when the weight of sodium tartrate is 2 g, the weight of glucose is 0.5 g and the weight of glucose is 2 g, the first temperature is 100 degrees and the second time is 10 hours.
In some embodiments, the second temperature is 330 degrees to 360 degrees and the third time is 2.7 hours to 3.1 hours.
It can be understood that the gel is continuously heated at the second temperature for the third time, so that the gel can be carbonized at low temperature, the retention time of the soil remediation agent in the soil is prolonged, and the efficient degradation of the polycyclic aromatic hydrocarbon by the soil remediation agent is ensured.
Wherein, through the arrangement of 330-360 degrees and 2.7-3.1 hours, the gel can be carbonized, the structure of the components in the gel is prevented from being damaged, and the high-efficiency degradation of the polycyclic aromatic hydrocarbon by the soil repairing agent is ensured.
The second temperature is a heating temperature of the gel, and a value of the second temperature may be set according to actual needs, for example, the second temperature may be 330 degrees, 342 degrees, 350 degrees, 354 degrees, 360 degrees, and the like.
The third time is the heating time of the gel, and the value of the third time can be set according to actual needs, for example, the third time can be 2.7 hours, 2.8 hours, 3 hours, 3.1 hours, and the like.
Among them, it is preferable that when the weight of sodium tartrate is 2 g, the weight of glucose is 0.5 g and the weight of glucose is 2 g, the second temperature is 350 degrees and the third time is 3 hours.
In some embodiments, in S4, heating the mixed liquor at the first temperature comprises:
s41: placing the mixed solution in an oven;
s42: the temperature of the oven was adjusted to the first temperature.
It can be understood that, through the heating of oven, make the mixed liquor can fully evaporate moisture under the first temperature to obtain the gel, make the soil restoration agent that finally obtains be solid-state structure, and then be convenient for the storage of soil restoration agent, carry, and prolong the residence time of soil restoration agent in soil greatly, effectively improved soil restoration agent to polycyclic aromatic hydrocarbon's degradation efficiency.
It should be noted that the oven shell is generally made of thin steel plates, the surface is baked with paint, the inner cavity is made of high-quality structural steel plates, aluminum silicate fibers are filled between the shell and the inner cavity, the heater is arranged at the bottom and can also be arranged at the top or two sides, and the temperature control instrument is a digital display intelligent meter. The specific type of the oven can be set according to actual needs, and is not limited in this regard.
In some embodiments, in S5, heating the gel at the second temperature comprises:
s51: placing the gel in a muffle furnace;
s52: the temperature of the muffle furnace is adjusted to a second temperature.
The method has the advantages that the gel can be fully carbonized at the second temperature through heating of the muffle furnace, so that the soil remediation agent is obtained, the retention time of the soil remediation agent in the soil is prolonged, and the efficient degradation of the polycyclic aromatic hydrocarbon by the soil remediation agent is ensured.
The muffle furnace is also called an electric furnace, a resistance furnace, a muffle furnace, and the like, and is a general heating device, and can be classified into a box furnace, a tube furnace, and a crucible furnace according to the external shape. The specific type of the muffle furnace can be set according to actual needs, and is not limited in this regard.
In some embodiments, after heating the gel at the second temperature for a third time to obtain the soil remediation agent, the method of preparing further comprises:
s6: cooling the soil remediation agent to a third temperature;
s7: alternately cleaning the soil remediation agent for multiple times by using deionized water and ethanol;
s8: and drying the soil remediation agent under vacuum at a fourth temperature for a fourth time.
It can be understood that the soil remediation agent is cooled to the third temperature, and is alternately cleaned by deionized water and ethanol and dried in vacuum, so that impurities and the like on the surface of the soil remediation agent are removed, and the efficient degradation of the polycyclic aromatic hydrocarbon by the soil remediation agent is ensured.
It is to be noted that ethanol is an organic compound of formula C 2 H 6 O, ethanol is also called alcohol, is a volatile colorless transparent liquid at normal temperature and normal pressure, is flammable and can be mutually dissolved with water in any ratio.
In some embodiments, the fourth temperature is 75 degrees to 93 degrees and the fourth time is 10 hours to 13 hours.
It can be understood that the soil remediation agent is continuously dried for the fourth time at the fourth temperature, so that the water and ethanol on the surface of the soil remediation agent can be sufficiently removed, and the efficient degradation of the polycyclic aromatic hydrocarbon by the soil remediation agent is ensured.
Wherein, through setting at 75-93 ℃ for 10-13 hours, the water and ethanol on the surface of the soil repairing agent can be fully removed, and the high-efficiency degradation of polycyclic aromatic hydrocarbon by the soil repairing agent is ensured.
The fourth temperature is a drying temperature of the soil remediation agent, and the value of the fourth temperature can be set according to actual needs, for example, the fourth temperature can be 75 degrees, 78 degrees, 90 degrees, 91 degrees, 93 degrees, and the like.
The fourth time is the drying time of the soil remediation agent, and the value of the fourth time can be set according to actual needs, for example, the fourth time can be 10 hours, 10.8 hours, 11 hours, 11.3 hours, 12 hours, 13 hours, and the like.
Among them, it is preferable that when the weight of sodium tartrate is 2 g, the weight of glucose is 0.5 g and the weight of glucose is 2 g, the fourth temperature is 90 degrees and the fourth time is 12 hours.
In some embodiments, the third temperature is 17-28 degrees, and the soil remediation agent is washed 4-7 times with deionized water and ethanol alternately.
It can be understood that the soil remediation agent is cooled to the third temperature and is alternately cleaned by the deionized water and the ethanol, so that impurities and the like on the surface of the soil remediation agent are sufficiently removed, and the polycyclic aromatic hydrocarbon is efficiently degraded by the soil remediation agent.
Wherein, through the arrangement of 17-28 degrees and 4-7 times, the water and ethanol on the surface of the soil repairing agent can be fully removed, and the high-efficiency degradation of the soil repairing agent to the polycyclic aromatic hydrocarbon is ensured.
It should be noted that the third temperature is a temperature after the soil remediation agent is cooled, and a value of the third temperature may be set according to actual needs, for example, the third temperature may be 17 degrees, 19 degrees, 20 degrees, 24 degrees, 28 degrees, and the like.
The number of times of alternate cleaning of the soil repairing agent can be set according to actual requirements, and for example, the number of times of alternate cleaning of the soil repairing agent can be 4 times, 5 times, 6 times, 7 times and the like.
In the description of the present disclosure, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Further, in the description of the present disclosure, "a plurality" means two or more unless otherwise specified.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and the scope of the preferred embodiments of the present disclosure includes other implementations in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the embodiments of the present disclosure.
In the description of the present specification, reference to the description of "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present disclosure have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present disclosure, and that changes, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present disclosure.
Claims (10)
1. A method for preparing a soil remediation agent, comprising:
obtaining sodium tartrate, glucose and ferrous sulfate heptahydrate;
mixing the sodium tartrate, the glucose and the ferrous sulfate heptahydrate according to a weight ratio to obtain a raw material;
dissolving the raw materials in deionized water and continuously stirring for the first time to obtain a mixed solution;
heating the mixed solution at a first temperature for a second time to obtain gel;
and heating the gel at a second temperature for a third time to obtain the soil remediation agent.
2. The method of claim 1 wherein said mixing said sodium tartrate, said glucose and said ferrous sulfate heptahydrate in a weight ratio to obtain a raw material comprises:
obtaining 1.7 grams to 2.5 grams of the sodium tartrate as a first component;
obtaining 0.3 g to 0.6 g of said glucose as a second component;
obtaining 1.8 grams to 2.3 grams of the ferrous sulfate heptahydrate as a third component;
mixing the first component, the second component and the third component to obtain the raw material.
3. The method of claim 2 wherein said deionized water is 18 ml to 23 ml and said first time is 17 minutes to 24 minutes.
4. The method of claim 2 wherein said first temperature is 90-110 degrees and said second time is 8-12 hours.
5. The method of claim 2 wherein said second temperature is 330-360 degrees and said third time is 2.7-3.1 hours.
6. The method of claim 1 wherein said heating said mixture at a first temperature comprises:
placing the mixed solution in an oven;
the temperature of the oven was adjusted to the first temperature.
7. The method of preparing a soil remediation agent of claim 1 wherein said heating the gel at a second temperature includes:
placing the gel in a muffle furnace;
adjusting the temperature of the muffle furnace to the second temperature.
8. The method of preparing a soil remediation agent of any one of claims 1 to 7 wherein after said heating of said gel at a second temperature for a third period of time to provide said soil remediation agent, said method further comprises:
cooling the soil remediation agent to a third temperature;
alternately cleaning the soil remediation agent for multiple times by using deionized water and ethanol;
and drying the soil remediation agent under vacuum at a fourth temperature for a fourth time.
9. The method of claim 8 wherein said fourth temperature is 75-93 degrees and said fourth time is 10-13 hours.
10. The method of claim 8 wherein said third temperature is 17-28 degrees and said soil remediation agent is washed 4-7 times with deionized water and ethanol.
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| WO1996041890A1 (en) * | 1995-06-13 | 1996-12-27 | Institut Français Du Petrole | Method and medium for producing gellan in the presence of manganese |
| CN105251763A (en) * | 2015-10-14 | 2016-01-20 | 周世永 | Method for remediating polycyclic aromatic hydrocarbon (PAH) polluted soil through cooperation of alfalfa and complex microbial inoculants |
| CN108641721A (en) * | 2018-03-14 | 2018-10-12 | 江苏大学 | One kind being based on mesoporous Fe3O4The preparation method and applications of the polycyclic aromatic hydrocarbon pollution repair materials of/carbon composite |
| CN109848194A (en) * | 2019-03-09 | 2019-06-07 | 皖建生态环境建设有限公司 | Ecological environment of soil restorative procedure |
| CN113755178A (en) * | 2020-12-28 | 2021-12-07 | 北京润鸣环境科技有限公司 | Stabilizing repairing agent capable of simultaneously stabilizing arsenic and cadmium polluted soil as well as preparation method and using method thereof |
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| WO1996041890A1 (en) * | 1995-06-13 | 1996-12-27 | Institut Français Du Petrole | Method and medium for producing gellan in the presence of manganese |
| CN105251763A (en) * | 2015-10-14 | 2016-01-20 | 周世永 | Method for remediating polycyclic aromatic hydrocarbon (PAH) polluted soil through cooperation of alfalfa and complex microbial inoculants |
| CN108641721A (en) * | 2018-03-14 | 2018-10-12 | 江苏大学 | One kind being based on mesoporous Fe3O4The preparation method and applications of the polycyclic aromatic hydrocarbon pollution repair materials of/carbon composite |
| CN109848194A (en) * | 2019-03-09 | 2019-06-07 | 皖建生态环境建设有限公司 | Ecological environment of soil restorative procedure |
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