CN112871945A - Liquid chelating agent for life landfill standard and preparation method thereof - Google Patents
Liquid chelating agent for life landfill standard and preparation method thereof Download PDFInfo
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- CN112871945A CN112871945A CN202011405765.5A CN202011405765A CN112871945A CN 112871945 A CN112871945 A CN 112871945A CN 202011405765 A CN202011405765 A CN 202011405765A CN 112871945 A CN112871945 A CN 112871945A
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- chelating agent
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- sodium sulfide
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- 239000007788 liquid Substances 0.000 title claims abstract description 82
- 239000002738 chelating agent Substances 0.000 title claims abstract description 51
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- 238000010561 standard procedure Methods 0.000 title description 2
- 229910052979 sodium sulfide Inorganic materials 0.000 claims abstract description 38
- GRVFOGOEDUUMBP-UHFFFAOYSA-N sodium sulfide (anhydrous) Chemical compound [Na+].[Na+].[S-2] GRVFOGOEDUUMBP-UHFFFAOYSA-N 0.000 claims abstract description 38
- ZPWVASYFFYYZEW-UHFFFAOYSA-L dipotassium hydrogen phosphate Chemical compound [K+].[K+].OP([O-])([O-])=O ZPWVASYFFYYZEW-UHFFFAOYSA-L 0.000 claims abstract description 34
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims abstract description 33
- 229910052700 potassium Inorganic materials 0.000 claims abstract description 33
- 239000011591 potassium Substances 0.000 claims abstract description 33
- 239000002994 raw material Substances 0.000 claims abstract description 25
- 238000000034 method Methods 0.000 claims abstract description 21
- 238000003756 stirring Methods 0.000 claims description 42
- 238000001816 cooling Methods 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 7
- 238000002156 mixing Methods 0.000 claims description 7
- 238000004321 preservation Methods 0.000 claims description 7
- 239000005843 Thiram Substances 0.000 claims description 3
- KUAZQDVKQLNFPE-UHFFFAOYSA-N thiram Chemical compound CN(C)C(=S)SSC(=S)N(C)C KUAZQDVKQLNFPE-UHFFFAOYSA-N 0.000 claims description 3
- 229960002447 thiram Drugs 0.000 claims description 3
- 239000013522 chelant Substances 0.000 claims 4
- 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
- 239000010813 municipal solid waste Substances 0.000 description 6
- 230000008569 process Effects 0.000 description 4
- 239000002910 solid waste Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- 230000002195 synergetic effect Effects 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 229910000396 dipotassium phosphate Inorganic materials 0.000 description 2
- 235000019797 dipotassium phosphate Nutrition 0.000 description 2
- 229910001385 heavy metal Inorganic materials 0.000 description 2
- LWIHDJKSTIGBAC-UHFFFAOYSA-K potassium phosphate Substances [K+].[K+].[K+].[O-]P([O-])([O-])=O LWIHDJKSTIGBAC-UHFFFAOYSA-K 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification 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
- 239000006172 buffering agent Substances 0.000 description 1
- QGJOPFRUJISHPQ-NJFSPNSNSA-N carbon disulfide-14c Chemical compound S=[14C]=S QGJOPFRUJISHPQ-NJFSPNSNSA-N 0.000 description 1
- 230000009920 chelation Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 239000010791 domestic waste Substances 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 239000010808 liquid waste Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 229920002401 polyacrylamide Polymers 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
- 238000004056 waste incineration Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B1/00—Dumping solid waste
- B09B1/004—Covering of dumping sites
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D3/00—Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances
- A62D3/30—Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances by reacting with chemical agents
- A62D3/33—Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances by reacting with chemical agents by chemical fixing the harmful substance, e.g. by chelation or complexation
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- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention provides a standard liquid chelating agent for life landfill, which is prepared from the following raw materials in parts by weight: 60-80 parts of potassium fomesate, 16-24 parts of dipotassium hydrogen phosphate and 7.5-12.5 parts of liquid sodium sulfide. The liquid chelating agent for the domestic landfill standard is simple to use and operate, can quickly react with lead, is stable for a long time, and can enable metals such as lead to reach the standard for a long time; in addition, the components are simple, the raw materials are easy to obtain, the preparation is convenient, the cost is low, and the method is suitable for large-scale industrial application.
Description
Technical Field
The invention relates to the field of chelating agents, in particular to a liquid chelating agent for a life landfill standard and a preparation method thereof.
Background
The municipal solid waste refers to solid waste generated in or during activities of providing services for municipal daily life and solid waste regarded as municipal solid waste by laws and administrative regulations. In 2016, the annual production of 214 domestic and domestic and middle cities is 18850.5 x 104t, wherein a large amount of domestic garbage generates a large amount of waste water, waste gas and solid waste pollutants due to improper treatment, so that the domestic and residential environments of people are directly influenced, and simultaneously, a large amount of recyclable resources are wasted. In particular, the city-around phenomenon of garbage, the stink of domestic garbage disposal plants, the pollution of farmlands and underground water and other events which occur in recent years make people aware of the importance and the urgency of the municipal domestic garbage disposal.
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 for 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 for certain urban incineration fly ash solidification enterprises,
however, at present, a liquid chelating agent which is simple to use and operate, can rapidly react with lead, can be stable for a long time, and can enable metals such as lead to reach the standards for life landfill for a long time is lacked.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a liquid chelating agent for a life landfill standard 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 chelating agent for a domestic landfill standard is prepared from the following raw materials in parts by weight:
60-80 parts of potassium fomesa,
16-24 parts of dipotassium hydrogen phosphate,
7.5-12.5 parts of liquid sodium sulfide.
Preferably, the liquid chelating agent for the domestic landfill standard is prepared from the following raw materials in parts by weight:
65-75 parts of thiram potassium,
18-21 parts of dipotassium hydrogen phosphate,
9-11 parts of liquid sodium sulfide.
Preferably, the liquid chelating agent for the domestic landfill standard is prepared from the following raw materials in parts by weight:
70 portions of potassium Fumei,
20 parts of dipotassium hydrogen phosphate,
10 parts of liquid sodium sulfide.
Preferably, the liquid chelating agent for the domestic landfill standard is prepared from the following raw materials in parts by weight:
72 parts of Fumei potassium,
19.8 parts of dipotassium hydrogen phosphate,
10.4 parts of liquid sodium sulfide.
The invention also provides a preparation method of the liquid chelating agent for the life landfill standard, which comprises the following steps:
s1, preparing potassium fomesate, dipotassium hydrogen phosphate and liquid sodium sulfide according to parts by weight;
s2, firstly, mixing the potassium fomesate and the dipotassium hydrogen phosphate to complete primary stirring;
s3, adding liquid sodium sulfide into the materials to complete secondary stirring;
and S4, carrying out heat preservation and standing treatment for 20-30 min, and cooling to room temperature to obtain the liquid chelating agent for the standard of the living landfill.
Preferably, the primary stirring time is 15-20 min, the stirring speed is 500-600 r/min, the secondary stirring time is 10-14 min, and the stirring speed is 400-500 r/min.
(III) advantageous effects
The invention provides a liquid chelating agent for a life landfill standard and a preparation method thereof. The method has the following beneficial effects:
1. the liquid chelating agent for the domestic landfill standard is prepared by selecting raw materials, optimizing the content of each raw material and selecting the potassium fomesate, the dipotassium hydrogen phosphate and the liquid sodium sulfide in proper proportion, so that the advantages of the raw materials are fully exerted, the raw materials complement each other and promote each other, the quality of a product is improved, and the prepared liquid chelating agent for the domestic landfill standard is simple to use and operate, can quickly react with lead, can be stable for a long time, and can make metals such as the lead reach the standard for a long time;
2. in addition, the components are simple, the raw materials are easy to obtain, the preparation is convenient, the cost is low, and the method is suitable for large-scale industrial application.
3. The liquid chelating agent for the standard of the life landfill is selected according to proper proportion
The potassium fomesate is matched with other components to play a good synergistic role, so that the liquid chelating agent for the standard of the domestic landfill can be quickly chelated with lead.
The dipotassium phosphate is matched with other components to play a good synergistic effect, so that the problem of long-term solidification of the organic chelating agent is solved, and the pH value of the leachate is adjusted by using the dipotassium phosphate as a buffering agent; the liquid chelating agent for the domestic landfill standard is simple to use and operate, can react with lead quickly and is stable for a long time, and can lead and other metals to reach the standard for a long time; in addition, the components are simple, the raw materials are easy to obtain, the preparation is convenient, the cost is low, and the method is suitable for large-scale industrial application.
The liquid sodium sulfide is matched with other components to play a good synergistic role, and the unstable chelation of the chelating agent to lead is compensated, so that the liquid chelating agent for the standard of the life landfill is simple to use and operate, can quickly react with the lead and is stable for a long time, and can lead and other metals reach the standard for a long time; in addition, the components are simple, the raw materials are easy to obtain, the preparation is convenient, the cost is low, and the method is suitable for large-scale industrial application.
Drawings
FIG. 1 is a graph of Pb concentration as a function of time (sodium sulfide added in minutes) in accordance with the present invention;
FIG. 2 is a graph of Pb concentration as a function of time (without sodium sulfide added, in minutes) according to the present invention;
FIG. 3 is a graph showing the change in Pb concentration with time (in months with sodium sulfide added) according to the present invention;
fig. 4 is a graph showing the change in Pb concentration with time according to the present invention (no sodium sulfide added, in months).
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.
A liquid chelating agent for a domestic landfill standard is prepared from the following raw materials in parts by weight:
60-80 parts of potassium fomesa,
16-24 parts of dipotassium hydrogen phosphate,
7.5-12.5 parts of liquid sodium sulfide.
Preferably, the liquid chelating agent for the domestic landfill standard is prepared from the following raw materials in parts by weight:
65-75 parts of thiram potassium,
18-21 parts of dipotassium hydrogen phosphate,
9-11 parts of liquid sodium sulfide.
Preferably, the liquid chelating agent for the domestic landfill standard is prepared from the following raw materials in parts by weight:
70 portions of potassium Fumei,
20 parts of dipotassium hydrogen phosphate,
10 parts of liquid sodium sulfide.
Preferably, the liquid chelating agent for the domestic landfill standard is prepared from the following raw materials in parts by weight:
72 parts of Fumei potassium,
19.8 parts of dipotassium hydrogen phosphate,
10.4 parts of liquid sodium sulfide.
The invention also provides a preparation method of the liquid chelating agent for the life landfill standard, which comprises the following steps:
s1, preparing potassium fomesate, dipotassium hydrogen phosphate and liquid sodium sulfide according to parts by weight;
s2, firstly, mixing the potassium fomesate and the dipotassium hydrogen phosphate to complete primary stirring;
s3, adding liquid sodium sulfide into the materials to complete secondary stirring;
and S4, carrying out heat preservation and standing treatment for 20-30 min, and cooling to room temperature to obtain the liquid chelating agent for the standard of the living landfill.
Preferably, the primary stirring time is 15-20 min, the stirring speed is 500-600 r/min, the secondary stirring time is 10-14 min, and the stirring speed is 400-500 r/min.
The first embodiment is as follows:
a liquid chelating agent for a domestic landfill standard is prepared from the following raw materials in parts by weight:
65 portions of Fumei potassium,
18 parts of dipotassium hydrogen phosphate,
9 parts of liquid sodium sulfide.
In this embodiment, a method for preparing a liquid chelating agent for use in landfill standards, the method comprising the steps of:
s1, preparing potassium fomesate, dipotassium hydrogen phosphate and liquid sodium sulfide according to parts by weight;
s2, firstly, mixing the potassium fomesate and the dipotassium hydrogen phosphate to complete primary stirring;
s3, adding liquid sodium sulfide into the materials to complete secondary stirring;
and S4, carrying out heat preservation and standing treatment for 30min, and cooling to room temperature to obtain the liquid chelating agent for the standard of the living landfill.
In this embodiment, the primary stirring time is 15min, the stirring speed is 600r/min, the secondary stirring time is 10min, and the stirring speed is 500 r/min.
Example two:
a liquid chelating agent for a domestic landfill standard is prepared from the following raw materials in parts by weight:
75 portions of potassium Fumei,
21 parts of dipotassium hydrogen phosphate,
11 parts of liquid sodium sulfide.
In this embodiment, a method for preparing a liquid chelating agent for use in landfill standards, the method comprising the steps of:
s1, preparing potassium fomesate, dipotassium hydrogen phosphate and liquid sodium sulfide according to parts by weight;
s2, firstly, mixing the potassium fomesate and the dipotassium hydrogen phosphate to complete primary stirring;
s3, adding liquid sodium sulfide into the materials to complete secondary stirring;
and S4, carrying out heat preservation and standing treatment for 20min, and cooling to room temperature to obtain the liquid chelating agent for the standard of the living landfill.
In this embodiment, the primary stirring time is 20min, the stirring speed is 500r/min, the secondary stirring time is 14min, and the stirring speed is 400 r/min.
Example three:
a liquid chelating agent for a domestic landfill standard is prepared from the following raw materials in parts by weight:
70 portions of potassium Fumei,
20 parts of dipotassium hydrogen phosphate,
10 parts of liquid sodium sulfide.
In this embodiment, a method for preparing a liquid chelating agent for use in landfill standards, the method comprising the steps of:
s1, preparing potassium fomesate, dipotassium hydrogen phosphate and liquid sodium sulfide according to parts by weight;
s2, firstly, mixing the potassium fomesate and the dipotassium hydrogen phosphate to complete primary stirring;
s3, adding liquid sodium sulfide into the materials to complete secondary stirring;
and S4, carrying out heat preservation and standing treatment for 25min, and cooling to room temperature to obtain the liquid chelating agent for the standard of the living landfill.
In this embodiment, the primary stirring time is 17min, the stirring speed is 540r/min, the secondary stirring time is 12min, and the stirring speed is 450 r/min.
Example four:
a liquid chelating agent for a domestic landfill standard is prepared from the following raw materials in parts by weight:
72 parts of Fumei potassium,
19.8 parts of dipotassium hydrogen phosphate,
10.4 parts of liquid sodium sulfide.
In this embodiment, a method for preparing a liquid chelating agent for use in landfill standards, the method comprising the steps of:
s1, preparing potassium fomesate, dipotassium hydrogen phosphate and liquid sodium sulfide according to parts by weight;
s2, firstly, mixing the potassium fomesate and the dipotassium hydrogen phosphate to complete primary stirring;
s3, adding liquid sodium sulfide into the materials to complete secondary stirring;
and S4, carrying out heat preservation and standing treatment for 27min, and cooling to room temperature to obtain the liquid chelating agent for the standard of the living landfill.
In this embodiment, the primary stirring time is 18min, the stirring speed is 560r/min, the secondary stirring time is 12min, and the stirring speed is 475 r/min.
The liquid chelating agent for the standard of living landfill obtained in example 4 of the present invention (comparative example without addition of sodium sulfide) was subjected to the performance test, and the test results are shown in fig. 1 to 4.
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 (6)
1. A liquid chelant for use in a domestic landfill standard, characterized by: the feed is prepared from the following raw materials in parts by weight:
60-80 parts of potassium fomesa,
16-24 parts of dipotassium hydrogen phosphate,
7.5-12.5 parts of liquid sodium sulfide.
2. A liquid chelant for use in a domestic landfill standard according to claim 1, wherein: the liquid chelating agent for the life landfill standard is prepared from the following raw materials in parts by weight:
65-75 parts of thiram potassium,
18-21 parts of dipotassium hydrogen phosphate,
9-11 parts of liquid sodium sulfide.
3. A liquid chelant for use in a domestic landfill standard according to claim 1, wherein: the liquid chelating agent for the life landfill standard is prepared from the following raw materials in parts by weight:
70 portions of potassium Fumei,
20 parts of dipotassium hydrogen phosphate,
10 parts of liquid sodium sulfide.
4. A liquid chelant for use in a domestic landfill standard according to claim 1, wherein: the liquid chelating agent for the life landfill standard is prepared from the following raw materials in parts by weight:
72 parts of Fumei potassium,
19.8 parts of dipotassium hydrogen phosphate,
10.4 parts of liquid sodium sulfide.
5. A preparation method of a liquid chelating agent for a domestic landfill standard is characterized by comprising the following steps: the preparation method comprises the following steps:
s1, preparing potassium fomesate, dipotassium hydrogen phosphate and liquid sodium sulfide according to parts by weight;
s2, firstly, mixing the potassium fomesate and the dipotassium hydrogen phosphate to complete primary stirring;
s3, adding liquid sodium sulfide into the materials to complete secondary stirring;
and S4, carrying out heat preservation and standing treatment for 20-30 min, and cooling to room temperature to obtain the liquid chelating agent for the standard of the living landfill.
6. The method of claim 6, wherein the liquid chelating agent is prepared by the following steps: the primary stirring time is 15-20 min, the stirring speed is 500-600 r/min, the secondary stirring time is 10-14 min, and the stirring speed is 400-500 r/min.
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| CN202011405765.5A CN112871945A (en) | 2020-12-03 | 2020-12-03 | Liquid chelating agent for life landfill standard and preparation method thereof |
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2020
- 2020-12-03 CN CN202011405765.5A patent/CN112871945A/en active Pending
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Application publication date: 20210601 |