CN117003328A - Odor control agent for wastewater treatment of pesticide contaminated sites and preparation method thereof - Google Patents
Odor control agent for wastewater treatment of pesticide contaminated sites and preparation method thereof Download PDFInfo
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- CN117003328A CN117003328A CN202311220089.8A CN202311220089A CN117003328A CN 117003328 A CN117003328 A CN 117003328A CN 202311220089 A CN202311220089 A CN 202311220089A CN 117003328 A CN117003328 A CN 117003328A
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- zeolite powder
- control agent
- titanium dioxide
- modified zeolite
- ferrous sulfate
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- 239000000575 pesticide Substances 0.000 title claims abstract description 25
- 239000003795 chemical substances by application Substances 0.000 title claims abstract description 22
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 238000004065 wastewater treatment Methods 0.000 title claims description 11
- 239000000843 powder Substances 0.000 claims abstract description 61
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical class O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims abstract description 50
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 23
- SOQBVABWOPYFQZ-UHFFFAOYSA-N oxygen(2-);titanium(4+) Chemical compound [O-2].[O-2].[Ti+4] SOQBVABWOPYFQZ-UHFFFAOYSA-N 0.000 claims abstract description 23
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims abstract description 19
- 235000003891 ferrous sulphate Nutrition 0.000 claims abstract description 19
- 239000011790 ferrous sulphate Substances 0.000 claims abstract description 19
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 claims abstract description 19
- 229910000359 iron(II) sulfate Inorganic materials 0.000 claims abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 18
- 229910052742 iron Inorganic materials 0.000 claims abstract description 13
- 238000006243 chemical reaction Methods 0.000 claims abstract description 8
- 229910021536 Zeolite Inorganic materials 0.000 claims description 27
- 239000010457 zeolite Substances 0.000 claims description 27
- 238000002156 mixing Methods 0.000 claims description 20
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 15
- 238000003756 stirring Methods 0.000 claims description 14
- 238000000227 grinding Methods 0.000 claims description 11
- 239000012692 Fe precursor Substances 0.000 claims description 10
- 239000003513 alkali Substances 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 10
- 239000002243 precursor Substances 0.000 claims description 10
- 238000001027 hydrothermal synthesis Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 5
- 239000012153 distilled water Substances 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 5
- 230000001105 regulatory effect Effects 0.000 claims description 5
- 238000005406 washing Methods 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims 1
- 239000000203 mixture Substances 0.000 claims 1
- 238000005498 polishing Methods 0.000 claims 1
- 239000002957 persistent organic pollutant Substances 0.000 abstract description 10
- 239000002351 wastewater Substances 0.000 abstract description 10
- 239000000543 intermediate Substances 0.000 abstract description 5
- 239000000126 substance Substances 0.000 abstract description 5
- 230000002776 aggregation Effects 0.000 abstract description 3
- 238000004220 aggregation Methods 0.000 abstract description 3
- 238000005345 coagulation Methods 0.000 abstract description 3
- 230000015271 coagulation Effects 0.000 abstract description 3
- -1 iron modified zeolite Chemical class 0.000 abstract description 3
- 239000002245 particle Substances 0.000 abstract description 3
- 230000001699 photocatalysis Effects 0.000 abstract description 3
- 238000013033 photocatalytic degradation reaction Methods 0.000 abstract description 3
- 239000011148 porous material Substances 0.000 abstract description 3
- 238000001556 precipitation Methods 0.000 abstract description 3
- 238000001179 sorption measurement Methods 0.000 abstract description 3
- 239000010865 sewage Substances 0.000 description 12
- 231100000614 poison Toxicity 0.000 description 7
- 239000003440 toxic substance Substances 0.000 description 7
- 239000003905 agrochemical Substances 0.000 description 4
- 229910052785 arsenic Inorganic materials 0.000 description 4
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 4
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 4
- 229910052753 mercury Inorganic materials 0.000 description 4
- 230000002378 acidificating effect Effects 0.000 description 3
- 238000011049 filling Methods 0.000 description 3
- 229910001385 heavy metal Inorganic materials 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 239000013049 sediment Substances 0.000 description 3
- 230000008786 sensory perception of smell Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 230000007794 irritation Effects 0.000 description 1
- 210000004400 mucous membrane Anatomy 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 210000002345 respiratory system Anatomy 0.000 description 1
- 230000000192 social effect Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
- C02F1/5245—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/103—Arsenic compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/306—Pesticides
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/02—Odour removal or prevention of malodour
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/10—Photocatalysts
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Water Treatment By Sorption (AREA)
Abstract
The invention discloses an odor control agent for treating wastewater in a pesticide polluted site and a preparation method thereof, wherein the odor control agent comprises the following components in percentage by weight: 2-4% of modified zeolite powder, 2-5% of polyaluminum chloride and 2-3% of ferrous sulfate. The invention utilizes nano titanium dioxide/nano iron modified zeolite powder, polyaluminum chloride and ferrous sulfate to prepare the peculiar smell control agent for treating wastewater in a pesticide polluted site, the modified zeolite powder contains a large number of pore structures, has high specific surface area and good adsorption function, a large number of reaction sites are provided, the dispersibility of the peculiar smell control agent is improved, particle aggregation is avoided, the promotion of photocatalytic activity is facilitated, organic pollutants such as organic pesticides and intermediates in water are subjected to photocatalytic degradation, and the polyaluminum chloride and ferrous sulfate are subjected to coagulation and precipitation with peculiar smell substances in water under a proper pH condition, so that the influence of peculiar smell is reduced.
Description
Technical Field
The invention relates to the technical field of wastewater treatment, in particular to an odor control agent for wastewater treatment of pesticide polluted sites and a preparation method thereof.
Background
As industrial contaminated sites are being repaired on a large scale, problems related to the odor of the contaminated sites occur in recent years, causing serious negative social effects. In the process of repairing the pesticide polluted site, the problem of peculiar smell is more remarkable, such as Ningbo certain agricultural chemical factory repairing project, tianjin certain agricultural chemical factory repairing project and the like. In the prior art, the agricultural chemical has various varieties and complex quality of agricultural chemical wastewater, and is mainly characterized in that: (1) the concentration of pollutants is high, and the COD (chemical oxygen demand) can reach tens of thousands of milligrams per liter; (2) the toxicity is high, and besides pesticides and intermediates, the wastewater also contains toxic substances such as arsenic, mercury and the like and a plurality of substances which are difficult to degrade biologically; (3) malodor and irritation to human respiratory tract and mucous membrane; (4) the water quality and the water quantity are unstable.
The prior art does not provide a preparation which can control peculiar smell and degrade toxic substances such as arsenic, mercury and the like and can decompose organic pollutants such as pesticides, intermediates and the like aiming at the wastewater characteristics of pesticide polluted sites.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide an odor control agent for treating wastewater in pesticide polluted sites and a preparation method thereof.
In order to achieve the aim of the invention, the invention adopts the following technical scheme:
in one aspect, an odor control agent for wastewater treatment in pesticide contaminated sites is provided, comprising the following components in percentage by weight: 2-4% of modified zeolite powder, 2-5% of polyaluminum chloride and 2-3% of ferrous sulfate.
In another aspect, there is provided a method for preparing an odor control agent for wastewater treatment in a pesticide contaminated site, comprising the steps of:
taking a proper amount of water, adding modified zeolite powder, stirring uniformly, sequentially adding polyaluminium chloride and ferrous sulfate, and finally adding citric acid, and regulating the pH value of the solution to be between 4 and 6.
Further, the preparation method of the modified zeolite powder comprises the following steps:
step 1, mixing nano titanium dioxide powder and zeolite powder, adding absolute ethyl alcohol, grinding, roasting, cooling to room temperature, grinding again, adding distilled water, and uniformly mixing to obtain nano titanium dioxide precursor solution;
step 2, uniformly mixing zeolite powder, nano iron and alkali solution to prepare nano iron precursor solution;
and step 3, mixing the nano titanium dioxide precursor solution and the nano iron precursor solution, stirring and dispersing, performing hydrothermal reaction, cooling, centrifuging, washing and drying the product to obtain the modified zeolite powder.
Further, the mass ratio of the zeolite powder added in the step 1 to the step 2 is 1:1.
further, in the step 1, the addition amount of the nano titanium dioxide powder is 5-8% of the mass of the zeolite powder.
Further, in the step 1, the grinding time is 15-30 min, the roasting temperature is 300-500 ℃, the heating rate is 5-10 ℃/min, the roasting time is 1-2 h, and the regrinding time is 10-20 min.
Further, in the step 2, the addition amount of nano iron is 2-5% of the mass of the zeolite powder, and the volume mass ratio of alkali liquor to the zeolite powder is 5:1 to 10:1, the reaction temperature is 50-80 ℃.
Further, in the step 3, stirring and dispersing are carried out for 10-20 min, and then hydrothermal reaction is carried out for 10-15 h at 100-150 ℃.
The beneficial effects of the invention are as follows:
the invention utilizes nano titanium dioxide/nano iron modified zeolite powder, polyaluminum chloride and ferrous sulfate to prepare the peculiar smell control agent for treating wastewater in a pesticide polluted site, the modified zeolite powder contains a large number of pore structures, has high specific surface area and good adsorption function, a large number of reaction sites are provided, the dispersibility of the peculiar smell control agent is improved, particle aggregation is avoided, the promotion of photocatalytic activity is facilitated, organic pollutants such as organic pesticides and intermediates in water are subjected to photocatalytic degradation, and the polyaluminum chloride and ferrous sulfate are subjected to coagulation and precipitation with peculiar smell substances in water under a proper pH condition, so that the influence of peculiar smell is reduced. Simultaneously, ferrous sulfate, polyaluminium chloride and modified zeolite act together to adsorb toxic substances such as arsenic, mercury and the like in the wastewater, thereby achieving the effect of high-efficiency purification.
Detailed Description
The following description of the embodiments of the present invention is provided to facilitate understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and all the inventions which make use of the inventive concept are protected by the spirit and scope of the present invention as defined and defined in the appended claims to those skilled in the art.
Example 1
The odor control agent for wastewater treatment in pesticide contaminated sites in this embodiment comprises the following components in percentage by weight:
2% of modified zeolite powder, 2% of polyaluminum chloride and 2% of ferrous sulfate.
Which is prepared according to the following steps:
step 1, mixing nano titanium dioxide powder and zeolite powder, wherein the adding amount of the nano titanium dioxide powder is 5% of the mass of the zeolite powder. Adding a small amount of absolute ethyl alcohol, grinding for 15min, roasting at 300 ℃ at a heating rate of 5 ℃/min for 1h, cooling to room temperature, grinding for 10min again, adding distilled water, and uniformly mixing to obtain the nano titanium dioxide precursor solution.
Step 2, uniformly mixing zeolite powder, nano iron and alkali solution, wherein the addition amount of the nano iron is 2% of the mass of the zeolite powder, and the volume mass ratio of the alkali solution to the zeolite powder is 5:1, the reaction temperature is 50 ℃; preparing a nano iron precursor solution;
and step 3, mixing the nano titanium dioxide precursor solution and the nano iron precursor solution, stirring and dispersing for 10min, performing hydrothermal reaction at 100 ℃ for 10h, and cooling, centrifuging, washing and drying the product to obtain the modified zeolite powder.
And 4, taking a proper amount of water, adding modified zeolite powder, uniformly stirring, sequentially adding polyaluminum chloride and ferrous sulfate, and finally adding citric acid, and regulating the solution to be acidic and the pH value to be 4.
In a pesticide polluted site, taking the sewage which has serious odor and is black, filling the sewage into a bottle, adding the prepared odor control agent into the bottle filled with the sewage, uniformly stirring, and standing for half an hour. Through human body olfaction recognition and TVOC total amount, organic pollutants and heavy metals measurement, the odor of the bottle mouth is obviously reduced, the sediment is arranged at the bottom of the bottle, the color of sewage is clear, the TVOC total amount is reduced by 85% compared with that before the addition, the organic pollutants total amount is reduced by 80% compared with that before the addition, and the toxic substances total amount is reduced by 89% compared with that before the addition.
Example 2
The odor control agent for wastewater treatment in pesticide contaminated sites in this embodiment comprises the following components in percentage by weight:
3% of modified zeolite powder, 3% of polyaluminum chloride and 2% of ferrous sulfate.
The preparation method comprises the following steps:
step 1, mixing nano titanium dioxide powder and zeolite powder, wherein the adding amount of the nano titanium dioxide powder is 6% of the mass of the zeolite powder. Adding a small amount of absolute ethyl alcohol, grinding for 22min, roasting at 400 ℃ and a heating rate of 8 ℃/min for 1.5h, cooling to room temperature, grinding for 15min again, adding distilled water, and uniformly mixing to obtain the nano titanium dioxide precursor solution.
Step 2, uniformly mixing zeolite powder, nano iron and alkali solution, wherein the addition amount of the nano iron is 3% of the mass of the zeolite powder, and the volume mass ratio of the alkali solution to the zeolite powder is 8:1, the reaction temperature is 65 ℃; preparing nano iron precursor solution;
and step 3, mixing the nano titanium dioxide precursor solution and the nano iron precursor solution, stirring and dispersing for 15min, performing 120 ℃ hydrothermal reaction for 12h, and cooling, centrifuging, washing and drying the product to obtain the modified zeolite powder.
And 4, taking a proper amount of water, adding modified zeolite powder, uniformly stirring, sequentially adding polyaluminum chloride and ferrous sulfate, and finally adding citric acid, and regulating the solution to be acidic and the pH value to be 5.
In a pesticide polluted site, taking the sewage which has serious odor and is black, filling the sewage into a bottle, adding the prepared odor control agent into the bottle filled with the sewage, uniformly stirring, and standing for half an hour. Through human body olfaction recognition and TVOC total amount, organic pollutants and heavy metals measurement, the odor of the bottle mouth is obviously reduced, the sediment is arranged at the bottom of the bottle, the color of sewage is clear, the TVOC total amount is reduced by 88% compared with that before the addition, the organic pollutants total amount is reduced by 83% compared with that before the addition, and the toxic substances total amount is reduced by 90% compared with that before the addition.
Example 3
The odor control agent for wastewater treatment in pesticide contaminated sites in this embodiment comprises the following components in percentage by weight:
4% of modified zeolite powder, 5% of polyaluminum chloride and 3% of ferrous sulfate.
The preparation method comprises the following steps:
step 1, mixing nano titanium dioxide powder and zeolite powder, wherein the adding amount of the nano titanium dioxide powder is 8% of the mass of the zeolite powder. Adding a small amount of absolute ethyl alcohol, grinding for 30min, roasting at 500 ℃ and a heating rate of 10 ℃/min for 2h, cooling to room temperature, grinding for 20min again, adding distilled water, and uniformly mixing to obtain the nano titanium dioxide precursor solution.
Step 2, uniformly mixing zeolite powder, nano iron and alkali solution, wherein the addition amount of the nano iron is 5% of the mass of the zeolite powder, and the volume mass ratio of the alkali solution to the zeolite powder is 10:1, the reaction temperature is 80 ℃; preparing nano iron precursor solution;
and step 3, mixing the nano titanium dioxide precursor solution and the nano iron precursor solution, stirring and dispersing for 20min, performing hydrothermal reaction at 150 ℃ for 15h, and cooling, centrifuging, washing and drying the product to obtain the modified zeolite powder.
And 4, taking a proper amount of water, adding modified zeolite powder, uniformly stirring, sequentially adding polyaluminum chloride and ferrous sulfate, and finally adding citric acid, and regulating the solution to be acidic and the pH value to be 6.
In a pesticide polluted site, taking the sewage which has serious odor and is black, filling the sewage into a bottle, adding the prepared odor control agent into the bottle filled with the sewage, uniformly stirring, and standing for half an hour. Through human body olfaction recognition and TVOC total amount, organic pollutants and heavy metals measurement, the odor of the bottle mouth is obviously reduced, the sediment is arranged at the bottom of the bottle, the color of sewage is clear, the TVOC total amount is reduced by 84% compared with that before the addition, the organic pollutants total amount is reduced by 82% compared with that before the addition, and the toxic substances total amount is reduced by 88% compared with that before the addition.
The invention utilizes nano titanium dioxide/nano iron modified zeolite powder, polyaluminum chloride and ferrous sulfate to prepare the peculiar smell control agent for treating wastewater in a pesticide polluted site, the modified zeolite powder contains a large number of pore structures, has high specific surface area and good adsorption function, a large number of reaction sites are provided, the dispersibility of the peculiar smell control agent is improved, particle aggregation is avoided, the promotion of photocatalytic activity is facilitated, organic pollutants such as organic pesticides and intermediates in water are subjected to photocatalytic degradation, and the polyaluminum chloride and ferrous sulfate are subjected to coagulation and precipitation with peculiar smell substances in water under a proper pH condition, so that the influence of peculiar smell is reduced. Simultaneously, ferrous sulfate, polyaluminium chloride and modified zeolite act together to adsorb toxic substances such as arsenic, mercury and the like in the wastewater, thereby achieving the effect of high-efficiency purification.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.
Claims (8)
1. The odor control agent for the wastewater treatment of the pesticide contaminated site is characterized by comprising the following components in percentage by weight: 2-4% of modified zeolite powder, 2-5% of polyaluminum chloride and 2-3% of ferrous sulfate.
2. A method for preparing the odor control agent for wastewater treatment in a pesticide contaminated site according to claim 1, comprising the steps of:
taking a proper amount of water, adding modified zeolite powder, stirring uniformly, sequentially adding polyaluminium chloride and ferrous sulfate, and finally adding citric acid, and regulating the pH value of the solution to be between 4 and 6.
3. The process according to claim 2, wherein the process for preparing the modified zeolite powder comprises the steps of:
step 1, mixing nano titanium dioxide powder and zeolite powder, adding absolute ethyl alcohol, grinding, roasting, cooling to room temperature, grinding again, adding distilled water, and uniformly mixing to obtain nano titanium dioxide precursor solution;
step 2, uniformly mixing zeolite powder, nano iron and alkali solution to prepare nano iron precursor solution;
and step 3, mixing the nano titanium dioxide precursor solution and the nano iron precursor solution, stirring and dispersing, performing hydrothermal reaction, cooling, centrifuging, washing and drying the product to obtain the modified zeolite powder.
4. The preparation method according to claim 3, wherein the mass ratio of the zeolite powder added in the step 1 to the step 2 is 1:1.
5. the preparation method according to claim 3, wherein in the step 1, the addition amount of the nano titanium dioxide powder is 5% -8% of the mass of the zeolite powder.
6. The method according to claim 3, wherein in step 1, the polishing time is 15 to 30 minutes, the baking temperature is 300 to 500 ℃, the heating rate is 5 to 10 ℃/min, the baking time is 1 to 2 hours, and the regrinding time is 10 to 20 minutes.
7. The preparation method according to claim 3, wherein in the step 2, the addition amount of nano iron is 2% -5% of the mass of zeolite powder, and the volume mass ratio of alkali liquor to zeolite powder is 5:1 to 10:1, the reaction temperature is 50-80 ℃.
8. The process according to claim 3, wherein in step 3, the mixture is stirred and dispersed for 10 to 20 minutes and then subjected to hydrothermal reaction at 100 to 150℃for 10 to 15 hours.
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| CN202311220089.8A CN117003328A (en) | 2023-09-21 | 2023-09-21 | Odor control agent for wastewater treatment of pesticide contaminated sites and preparation method thereof |
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