CN112624726A - Liquid mixed chelating agent for hazardous waste landfill standard and preparation method thereof - Google Patents
Liquid mixed chelating agent for hazardous waste landfill standard and preparation method thereof Download PDFInfo
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- CN112624726A CN112624726A CN202011405749.6A CN202011405749A CN112624726A CN 112624726 A CN112624726 A CN 112624726A CN 202011405749 A CN202011405749 A CN 202011405749A CN 112624726 A CN112624726 A CN 112624726A
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- 239000002738 chelating agent Substances 0.000 title claims abstract description 74
- 239000007788 liquid Substances 0.000 title claims abstract description 54
- 239000002920 hazardous waste Substances 0.000 title claims abstract description 24
- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- 238000010561 standard procedure Methods 0.000 title description 2
- 239000000440 bentonite Substances 0.000 claims abstract description 66
- 229910000278 bentonite Inorganic materials 0.000 claims abstract description 66
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims abstract description 66
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims abstract description 44
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 44
- 239000002131 composite material Substances 0.000 claims abstract description 39
- 239000002904 solvent Substances 0.000 claims abstract description 26
- 239000002994 raw material Substances 0.000 claims abstract description 24
- 229920002401 polyacrylamide Polymers 0.000 claims abstract description 23
- 239000002518 antifoaming agent Substances 0.000 claims abstract description 22
- 229910000019 calcium carbonate Inorganic materials 0.000 claims abstract description 22
- SZVJSHCCFOBDDC-UHFFFAOYSA-N ferrosoferric oxide Chemical compound O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 claims abstract description 22
- ZPWVASYFFYYZEW-UHFFFAOYSA-L dipotassium hydrogen phosphate Chemical compound [K+].[K+].OP([O-])([O-])=O ZPWVASYFFYYZEW-UHFFFAOYSA-L 0.000 claims abstract description 19
- 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 claims abstract description 17
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000004568 cement Substances 0.000 claims abstract description 17
- 229910052700 potassium Inorganic materials 0.000 claims abstract description 17
- 239000011591 potassium Substances 0.000 claims abstract description 17
- 229910052708 sodium Inorganic materials 0.000 claims abstract description 17
- 239000011734 sodium Substances 0.000 claims abstract description 17
- 229920005552 sodium lignosulfonate Polymers 0.000 claims abstract description 17
- 239000003381 stabilizer Substances 0.000 claims abstract description 17
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 20
- -1 polyoxypropylene glycerol Polymers 0.000 claims description 16
- 239000000463 material Substances 0.000 claims description 15
- 238000003756 stirring Methods 0.000 claims description 15
- 238000001035 drying Methods 0.000 claims description 10
- RBNPOMFGQQGHHO-UHFFFAOYSA-N glyceric acid Chemical compound OCC(O)C(O)=O RBNPOMFGQQGHHO-UHFFFAOYSA-N 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 10
- 238000002156 mixing Methods 0.000 claims description 10
- 229920002503 polyoxyethylene-polyoxypropylene Polymers 0.000 claims description 10
- 150000001875 compounds Chemical class 0.000 claims description 9
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical group CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 5
- 150000001412 amines Chemical class 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 5
- 239000008367 deionised water Substances 0.000 claims description 5
- 229910021641 deionized water Inorganic materials 0.000 claims description 5
- 235000014113 dietary fatty acids Nutrition 0.000 claims description 5
- 235000019441 ethanol Nutrition 0.000 claims description 5
- 239000000194 fatty acid Substances 0.000 claims description 5
- 229930195729 fatty acid Natural products 0.000 claims description 5
- 238000000227 grinding Methods 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- 229920001451 polypropylene glycol Polymers 0.000 claims description 5
- 238000000926 separation method Methods 0.000 claims description 5
- 239000007787 solid Substances 0.000 claims description 5
- 239000011343 solid material Substances 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 229910052799 carbon Inorganic materials 0.000 claims description 4
- 150000003839 salts Chemical class 0.000 abstract description 10
- 230000007774 longterm Effects 0.000 abstract description 7
- 229910052751 metal Inorganic materials 0.000 abstract description 5
- 239000002184 metal Substances 0.000 abstract description 5
- 150000002739 metals Chemical class 0.000 abstract description 5
- 238000007711 solidification Methods 0.000 abstract description 4
- 230000008023 solidification Effects 0.000 abstract description 4
- 239000006172 buffering agent Substances 0.000 abstract description 2
- 238000006243 chemical reaction Methods 0.000 abstract description 2
- 238000002386 leaching Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 9
- 238000000034 method Methods 0.000 description 9
- 239000005416 organic matter Substances 0.000 description 7
- 230000008569 process Effects 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 239000013522 chelant Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 229910001385 heavy metal Inorganic materials 0.000 description 3
- 230000005764 inhibitory process Effects 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- QGJOPFRUJISHPQ-NJFSPNSNSA-N carbon disulfide-14c Chemical compound S=[14C]=S QGJOPFRUJISHPQ-NJFSPNSNSA-N 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 239000010791 domestic waste Substances 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000010808 liquid waste Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000004056 waste incineration Methods 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/34—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing cold phosphate binders
- C04B28/344—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing cold phosphate binders the phosphate binder being present in the starting composition solely as one or more phosphates
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00767—Uses not provided for elsewhere in C04B2111/00 for waste stabilisation purposes
- C04B2111/00775—Uses not provided for elsewhere in C04B2111/00 for waste stabilisation purposes the composition being used as waste barriers or the like, e.g. compositions used for waste disposal purposes only, but not containing the waste itself
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention provides a liquid mixed chelating agent for hazardous waste landfill standards and a preparation method thereof, and relates to the technical field of chelating agents. The liquid mixed chelating agent for the hazardous waste landfill standard comprises the following raw materials in parts by weight: 40-50 parts of organic chelating agent, 60-80 parts of potassium fomesate, 15-25 parts of dipotassium hydrogen phosphate, 6-8 parts of sodium lignosulfonate, 10-20 parts of cement, 4-8 parts of sodium humate, 20-30 parts of composite bentonite, 2-4 parts of stabilizer and 2-4 parts of defoaming agent; the composite bentonite is prepared from the following raw materials in parts by weight: 20-40 parts of bentonite, 20-30 parts of polyacrylamide, 6-8 parts of ferroferric oxide, 10-16 parts of calcium carbonate, 4-6 parts of activated carbon and 40-50 parts of solvent. The invention makes up the problem of long-term solidification of the organic chelating agent, the dipotassium hydrogen phosphate can be used as a buffering agent to adjust the PH of the leaching solution, the operation is simple, the reaction can be carried out quickly, the stability can be realized for a long time, the metals such as lead and the like can reach the standard for a long time, and the soluble salt and organic matters can reach the standard for a long time.
Description
Technical Field
The invention relates to the technical field of chelating agents, in particular to a liquid mixed chelating agent for hazardous waste landfill standards and a preparation method thereof.
Background
The patent publication No. CN101979416B discloses the preparation and application of a novel polymer chelating agent for stabilizing and treating dangerous wastes containing heavy metals, the polymer chelating agent is an addition product of polyacrylamide and carbon disulfide, the polymer chelating agent of the invention has good effect on treating solid or liquid wastes, and reaches the national waste landfill control standard, the patent has simple synthesis process and low cost, can effectively treat heavy metals in industrial or domestic waste incineration wastes, and is already used in certain urban incineration fly ash solidification enterprises, however, the long-term solidification problem of the organic chelating agent is difficult to compensate in the actual use process of the chelating agent, in addition, the pH value of the chelating agent leachate has large change, which affects the hazardous waste landfill treatment effect, and meanwhile, the chelating agent has slow reaction speed and is difficult to achieve the long-term stable effect, and can not lead and other metals, soluble salts and organic matters to reach the standard for a long time.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a liquid mixed chelating agent for hazardous waste landfill standards and a preparation method thereof, and solves the defects in the prior art.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme: a liquid mixed chelating agent for hazardous waste landfill standards comprises the following raw materials in parts by weight: 40-50 parts of organic chelating agent, 60-80 parts of potassium fomesate, 15-25 parts of dipotassium hydrogen phosphate, 6-8 parts of sodium lignosulfonate, 10-20 parts of cement, 4-8 parts of sodium humate, 20-30 parts of composite bentonite, 2-4 parts of stabilizer and 2-4 parts of defoaming agent;
the composite bentonite is prepared from the following raw materials in parts by weight: 20-40 parts of bentonite, 20-30 parts of polyacrylamide, 6-8 parts of ferroferric oxide, 10-16 parts of calcium carbonate, 4-6 parts of activated carbon and 40-50 parts of solvent.
Preferably, the solvent is absolute ethyl alcohol.
Preferably, the defoaming agent is one or more of a higher alcohol fatty acid ester complex, polyoxyethylene polyoxypropylene pentaerythritol ether, polyoxyethylene polyoxypropylene amine ether, polyoxypropylene glycerol ether and polyoxypropylene polyoxyethylene glycerol ether.
Preferably, the liquid mixed chelating agent comprises the following raw materials in parts by weight: 40 parts of organic chelating agent, 60 parts of potassium fomesate, 15 parts of dipotassium hydrogen phosphate, 6 parts of sodium lignosulfonate, 10 parts of cement, 4 parts of sodium humate, 20 parts of composite bentonite, 2 parts of stabilizer and 2 parts of defoaming agent;
the composite bentonite is prepared from the following raw materials in parts by weight: 20 parts of bentonite, 20 parts of polyacrylamide, 6 parts of ferroferric oxide, 10 parts of calcium carbonate, 40 parts of activated carbon and 40 parts of solvent.
Preferably, the liquid mixed chelating agent comprises the following raw materials in parts by weight: 45 parts of organic chelating agent, 70 parts of potassium fomesate, 20 parts of dipotassium hydrogen phosphate, 7 parts of sodium lignosulfonate, 15 parts of cement, 6 parts of sodium humate, 25 parts of composite bentonite, 3 parts of stabilizer and 3 parts of defoaming agent;
the composite bentonite is prepared from the following raw materials in parts by weight: 30 parts of bentonite, 25 parts of polyacrylamide, 7 parts of ferroferric oxide, 13 parts of calcium carbonate, 5 parts of activated carbon and 45 parts of solvent.
Preferably, the liquid mixed chelating agent comprises the following raw materials in parts by weight: 50 parts of organic chelating agent, 80 parts of potassium fomesate, 25 parts of dipotassium hydrogen phosphate, 8 parts of sodium lignosulfonate, 20 parts of cement, 8 parts of sodium humate, 30 parts of composite bentonite, 4 parts of stabilizer and 4 parts of defoaming agent;
the composite bentonite is prepared from the following raw materials in parts by weight: 40 parts of bentonite, 30 parts of polyacrylamide, 8 parts of ferroferric oxide, 16 parts of calcium carbonate, 6 parts of activated carbon and 50 parts of solvent.
A preparation method of a liquid mixed chelating agent for hazardous waste landfill standard comprises the following steps:
s1, preparing the composite bentonite, which comprises the following steps:
1) preparing bentonite, polyacrylamide, ferroferric oxide, calcium carbonate, activated carbon and a solvent according to the weight parts, firstly, uniformly mixing the bentonite, the polyacrylamide, the ferroferric oxide, the calcium carbonate and the activated carbon, then adding the solvent and continuously stirring for 5-10 min;
2) heating the above mixture in a sealed container at 80-100 deg.C for 30-60 min;
3) heating, cooling, performing solid-liquid separation on the materials, drying the obtained solid matters, and grinding the solid materials after drying to obtain powdery composite bentonite;
s2, mixing organic chelating agent, potassium fomesate, dipotassium hydrogen phosphate, sodium lignosulphonate, cement, sodium humate and composite bentonite uniformly, adding deionized water 8-10 times of the materials, and continuing stirring for 5-10 min;
and S3, adding a stabilizer and a defoaming agent into the mixed material, and continuously stirring for 5-10min to obtain the liquid mixed chelating agent.
(III) advantageous effects
The invention provides a liquid mixed chelating agent for hazardous waste landfill standards and a preparation method thereof. The method has the following beneficial effects:
1. the invention makes up the problem of long-term solidification of the organic chelating agent, the dipotassium hydrogen phosphate can be used as a buffering agent to adjust the PH of the leaching solution, the operation is simple, the reaction can be carried out quickly, the stability can be realized for a long time, the metals such as lead and the like can reach the standard for a long time, and the soluble salt and organic matters can reach the standard for a long time.
2. According to the invention, harmful substances such as heavy metal ions in hazardous waste can be adsorbed by utilizing the adsorbability of bentonite, the treatment of hazardous waste by an organic chelating agent is accelerated by utilizing the catalytic action of the bentonite, and the surface structure of the bentonite is increased by utilizing the thermal expansibility of absolute ethyl alcohol through modifying the bentonite, so that the adsorbability of the bentonite is better.
Drawings
FIG. 1 is a graph showing the change in Pb concentration with time (in minutes) according to the present invention;
FIG. 2 is a graph showing the change in Pb concentration with time (in months) according to the present invention;
FIG. 3 is a graph of soluble salts of the present invention as a function of time (in minutes);
FIG. 4 is a graph of soluble salts of the present invention as a function of time (in months);
FIG. 5 is a graph of organic matter as a function of time (in minutes) in accordance with the present invention;
fig. 6 is a graph of organic matter change over time (in months) in accordance with the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows:
the embodiment of the invention provides a liquid mixed chelating agent for hazardous waste landfill standards, which comprises the following raw materials in parts by weight: 40 parts of organic chelating agent, 60 parts of potassium fomesate, 15 parts of dipotassium hydrogen phosphate, 6 parts of sodium lignosulfonate, 10 parts of cement, 4 parts of sodium humate, 20 parts of composite bentonite, 2 parts of stabilizer and 2 parts of defoaming agent, wherein the defoaming agent is one or more of high-carbon alcohol fatty acid ester compound, polyoxyethylene polyoxypropylene pentaerythritol ether, polyoxyethylene polyoxypropylene amine ether, polyoxypropylene glycerol ether and polyoxypropylene polyoxyethylene glycerol ether;
the composite bentonite is prepared from the following raw materials in parts by weight: 20 parts of bentonite, 20 parts of polyacrylamide, 6 parts of ferroferric oxide, 10 parts of calcium carbonate, 40 parts of activated carbon and 40 parts of solvent.
A preparation method of a liquid mixed chelating agent for hazardous waste landfill standard comprises the following steps:
s1, preparing the composite bentonite, which comprises the following steps:
1) preparing bentonite, polyacrylamide, ferroferric oxide, calcium carbonate, activated carbon and a solvent according to the weight parts, firstly, uniformly mixing the bentonite, the polyacrylamide, the ferroferric oxide, the calcium carbonate and the activated carbon, then adding the solvent and continuously stirring for 5-10 min;
2) heating the above mixture in a sealed container at 80-100 deg.C for 30-60 min;
3) heating, cooling, performing solid-liquid separation on the materials, drying the obtained solid matters, and grinding the solid materials after drying to obtain powdery composite bentonite;
s2, mixing organic chelating agent, potassium fomesate, dipotassium hydrogen phosphate, sodium lignosulphonate, cement, sodium humate and composite bentonite uniformly, adding deionized water 8-10 times of the materials, and continuing stirring for 5-10 min;
and S3, adding a stabilizer and a defoaming agent into the mixed material, and continuously stirring for 5-10min to obtain the liquid mixed chelating agent.
Example two:
the embodiment of the invention provides a liquid mixed chelating agent for hazardous waste landfill standards, which comprises the following raw materials in parts by weight: 45 parts of organic chelating agent, 70 parts of potassium fomesate, 20 parts of dipotassium hydrogen phosphate, 7 parts of sodium lignosulfonate, 15 parts of cement, 6 parts of sodium humate, 25 parts of composite bentonite, 3 parts of stabilizer and 3 parts of defoaming agent, wherein the defoaming agent is one or more of high-carbon alcohol fatty acid ester compound, polyoxyethylene polyoxypropylene pentaerythritol ether, polyoxyethylene polyoxypropylene amine ether, polyoxypropylene glycerol ether and polyoxypropylene polyoxyethylene glycerol ether;
the composite bentonite is prepared from the following raw materials in parts by weight: 30 parts of bentonite, 25 parts of polyacrylamide, 7 parts of ferroferric oxide, 13 parts of calcium carbonate, 5 parts of activated carbon and 45 parts of solvent, wherein the solvent is absolute ethyl alcohol.
A preparation method of a liquid mixed chelating agent for hazardous waste landfill standard comprises the following steps:
s1, preparing the composite bentonite, which comprises the following steps:
1) preparing bentonite, polyacrylamide, ferroferric oxide, calcium carbonate, activated carbon and a solvent according to the weight parts, firstly, uniformly mixing the bentonite, the polyacrylamide, the ferroferric oxide, the calcium carbonate and the activated carbon, then adding the solvent and continuously stirring for 5-10 min;
2) heating the above mixture in a sealed container at 80-100 deg.C for 30-60 min;
3) heating, cooling, performing solid-liquid separation on the materials, drying the obtained solid matters, and grinding the solid materials after drying to obtain powdery composite bentonite;
s2, mixing organic chelating agent, potassium fomesate, dipotassium hydrogen phosphate, sodium lignosulphonate, cement, sodium humate and composite bentonite uniformly, adding deionized water 8-10 times of the materials, and continuing stirring for 5-10 min;
and S3, adding a stabilizer and a defoaming agent into the mixed material, and continuously stirring for 5-10min to obtain the liquid mixed chelating agent.
Example three:
the embodiment of the invention provides a liquid mixed chelating agent for hazardous waste landfill standards, which comprises the following raw materials in parts by weight: 50 parts of organic chelating agent, 80 parts of potassium fomesate, 25 parts of dipotassium hydrogen phosphate, 8 parts of sodium lignosulfonate, 20 parts of cement, 8 parts of sodium humate, 30 parts of composite bentonite, 4 parts of stabilizer and 4 parts of defoaming agent, wherein the defoaming agent is one or more of high-carbon alcohol fatty acid ester compound, polyoxyethylene polyoxypropylene pentaerythritol ether, polyoxyethylene polyoxypropylene amine ether, polyoxypropylene glycerol ether and polyoxypropylene polyoxyethylene glycerol ether;
the composite bentonite is prepared from the following raw materials in parts by weight: 40 parts of bentonite, 30 parts of polyacrylamide, 8 parts of ferroferric oxide, 16 parts of calcium carbonate, 6 parts of activated carbon and 50 parts of solvent, wherein the solvent is absolute ethyl alcohol.
A preparation method of a liquid mixed chelating agent for hazardous waste landfill standard comprises the following steps:
s1, preparing the composite bentonite, which comprises the following steps:
1) preparing bentonite, polyacrylamide, ferroferric oxide, calcium carbonate, activated carbon and a solvent according to the weight parts, firstly, uniformly mixing the bentonite, the polyacrylamide, the ferroferric oxide, the calcium carbonate and the activated carbon, then adding the solvent and continuously stirring for 5-10 min;
2) heating the above mixture in a sealed container at 80-100 deg.C for 30-60 min;
3) heating, cooling, performing solid-liquid separation on the materials, drying the obtained solid matters, and grinding the solid materials after drying to obtain powdery composite bentonite;
s2, mixing organic chelating agent, potassium fomesate, dipotassium hydrogen phosphate, sodium lignosulphonate, cement, sodium humate and composite bentonite uniformly, adding deionized water 8-10 times of the materials, and continuing stirring for 5-10 min;
and S3, adding a stabilizer and a defoaming agent into the mixed material, and continuously stirring for 5-10min to obtain the liquid mixed chelating agent.
According to the invention, the influence of the liquid mixed chelating agent on pb concentration is analyzed through experiments, as shown in figure 1, the pb concentration can reach below the standard line in a short time by using the liquid mixed chelating agent, which shows that the liquid mixed chelating agent has a good removal effect on pb and other metals; as shown in fig. 2, the long term inhibition of metals such as pb by the liquid compounded chelant is demonstrated by the use of a liquid compounded chelant such that the pb concentration remains below the mark for a long period of time.
According to the invention, the influence of the liquid mixed chelating agent on the soluble salt is analyzed through experiments, as shown in fig. 3, the soluble salt can reach below the standard line in a short time by using the liquid mixed chelating agent, which shows that the liquid mixed chelating agent has a good removal effect on the soluble salt; as shown in fig. 4, the long term inhibition effect of the liquid compound chelant of the present invention on soluble salts is demonstrated by using the liquid compound chelant such that the soluble salts remain below the compliance line for a long period of time.
According to the invention, the influence of the liquid mixed chelating agent on the organic matter is analyzed through experiments, as shown in fig. 5, the organic matter can reach below the standard line in a short time by using the liquid mixed chelating agent, which shows that the liquid mixed chelating agent has a good removal effect on the organic matter; as shown in fig. 6, the organic matter is still below the standard line for a long time by using the liquid compound chelating agent, which shows that the liquid compound chelating agent of the present invention has a long-term inhibition effect on the organic matter.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a reference structure" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The utility model provides a chelating agent is thoughtlessly joined in marriage to liquid for endangering useless landfill standard which characterized in that: the liquid mixed chelating agent comprises the following raw materials in parts by weight: 40-50 parts of organic chelating agent, 60-80 parts of potassium fomesate, 15-25 parts of dipotassium hydrogen phosphate, 6-8 parts of sodium lignosulfonate, 10-20 parts of cement, 4-8 parts of sodium humate, 20-30 parts of composite bentonite, 2-4 parts of stabilizer and 2-4 parts of defoaming agent;
the composite bentonite is prepared from the following raw materials in parts by weight: 20-40 parts of bentonite, 20-30 parts of polyacrylamide, 6-8 parts of ferroferric oxide, 10-16 parts of calcium carbonate, 4-6 parts of activated carbon and 40-50 parts of solvent.
2. The liquid compound chelating agent for hazardous waste landfill standard according to claim 1, characterized in that: the solvent is absolute ethyl alcohol.
3. The liquid compound chelating agent for hazardous waste landfill standard according to claim 1, characterized in that: the defoaming agent is one or more of a high-carbon alcohol fatty acid ester compound, polyoxyethylene polyoxypropylene pentaerythritol ether, polyoxyethylene polyoxypropylene amine ether, polyoxypropylene glycerol ether and polyoxypropylene polyoxyethylene glycerol ether.
4. The liquid compound chelating agent for hazardous waste landfill standard according to claim 1, characterized in that: the liquid mixed chelating agent comprises the following raw materials in parts by weight: 40 parts of organic chelating agent, 60 parts of potassium fomesate, 15 parts of dipotassium hydrogen phosphate, 6 parts of sodium lignosulfonate, 10 parts of cement, 4 parts of sodium humate, 20 parts of composite bentonite, 2 parts of stabilizer and 2 parts of defoaming agent;
the composite bentonite is prepared from the following raw materials in parts by weight: 20 parts of bentonite, 20 parts of polyacrylamide, 6 parts of ferroferric oxide, 10 parts of calcium carbonate, 40 parts of activated carbon and 40 parts of solvent.
5. The liquid compound chelating agent for hazardous waste landfill standard according to claim 1, characterized in that: the liquid mixed chelating agent comprises the following raw materials in parts by weight: 45 parts of organic chelating agent, 70 parts of potassium fomesate, 20 parts of dipotassium hydrogen phosphate, 7 parts of sodium lignosulfonate, 15 parts of cement, 6 parts of sodium humate, 25 parts of composite bentonite, 3 parts of stabilizer and 3 parts of defoaming agent;
the composite bentonite is prepared from the following raw materials in parts by weight: 30 parts of bentonite, 25 parts of polyacrylamide, 7 parts of ferroferric oxide, 13 parts of calcium carbonate, 5 parts of activated carbon and 45 parts of solvent.
6. The liquid compound chelating agent for hazardous waste landfill standard according to claim 1, characterized in that: the liquid mixed chelating agent comprises the following raw materials in parts by weight: 50 parts of organic chelating agent, 80 parts of potassium fomesate, 25 parts of dipotassium hydrogen phosphate, 8 parts of sodium lignosulfonate, 20 parts of cement, 8 parts of sodium humate, 30 parts of composite bentonite, 4 parts of stabilizer and 4 parts of defoaming agent;
the composite bentonite is prepared from the following raw materials in parts by weight: 40 parts of bentonite, 30 parts of polyacrylamide, 8 parts of ferroferric oxide, 16 parts of calcium carbonate, 6 parts of activated carbon and 50 parts of solvent.
7. A preparation method of a liquid mixed chelating agent for hazardous waste landfill standard is characterized by comprising the following steps: the preparation method comprises the following steps:
s1, preparing the composite bentonite, which comprises the following steps:
1) preparing bentonite, polyacrylamide, ferroferric oxide, calcium carbonate, activated carbon and a solvent according to the weight parts, firstly, uniformly mixing the bentonite, the polyacrylamide, the ferroferric oxide, the calcium carbonate and the activated carbon, then adding the solvent and continuously stirring for 5-10 min;
2) heating the above mixture in a sealed container at 80-100 deg.C for 30-60 min;
3) heating, cooling, performing solid-liquid separation on the materials, drying the obtained solid matters, and grinding the solid materials after drying to obtain powdery composite bentonite;
s2, mixing organic chelating agent, potassium fomesate, dipotassium hydrogen phosphate, sodium lignosulphonate, cement, sodium humate and composite bentonite uniformly, adding deionized water 8-10 times of the materials, and continuing stirring for 5-10 min;
and S3, adding a stabilizer and a defoaming agent into the mixed material, and continuously stirring for 5-10min to obtain the liquid mixed chelating agent.
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