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CN-121988295-A - Composite adsorption material for cooperatively removing ammonia and sulfide in pet environment and preparation method thereof

CN121988295ACN 121988295 ACN121988295 ACN 121988295ACN-121988295-A

Abstract

The invention discloses a composite adsorption material for cooperatively removing ammonia and sulfide in a pet environment and a preparation method thereof, and belongs to the technical field of environmental functional materials and gas purification. The composite adsorption material is prepared by taking zeolite and attapulgite as porous inorganic matrixes, constructing an interface adhesion layer on the surface of the porous inorganic matrixes through dopamine oxidation self-polymerization, introducing histidine-iron coordination to form enzyme-like active sites, constructing a reversible sulfur capture structure through thioglycollic acid and constructing a proton transfer network through phytic acid, and carrying out synergistic modification on the porous matrixes, and combining zinc chloride, ferric nitrate, sodium carboxymethyl cellulose and polyvinyl alcohol. According to the invention, by constructing a multistage synergistic system of the bionic enzyme active site, the dynamic sulfur capture structure and the proton transfer network, the efficient synergistic removal of ammonia and hydrogen sulfide is realized, the stability and the recycling performance of the material in a high-humidity environment are remarkably improved, and the method has a good application prospect.

Inventors

  • XU JINYUN
  • XU GUICHENG
  • XU BORUI

Assignees

  • 深圳市斗方科技有限公司

Dates

Publication Date
20260508
Application Date
20260405

Claims (10)

  1. 1. The composite adsorption material for the synergistic removal of ammonia and sulfide in the environment of pets is characterized by comprising, by weight, 60-120 parts of a synergistic modified porous inorganic matrix material, 0.5-8 parts of an organic small molecule function regulator, 0.1-2 parts of zinc chloride, 0.1-2 parts of ferric nitrate, 0.2-3 parts of sodium carboxymethyl cellulose, 0.2-3 parts of polyvinyl alcohol and 50-150 parts of deionized water, wherein the synergistic modified porous inorganic matrix material is formed by synergistically modifying a reversible sulfur capture structure constructed by constructing an interface adhesion layer by using zeolite and attapulgite through dopamine oxidation self-polymerization, introducing histidine-iron coordination, constructing a proton transfer network by using thioglycollic acid, and the organic small molecule function regulator is p-benzoquinone.
  2. 2. The composite adsorption material for the synergistic removal of ammonia and sulfides in the environment of pets according to claim 1 is characterized by comprising, by weight, 50-100 parts of zeolite, 10-40 parts of attapulgite, 0.5-5 parts of dopamine, 0.3-3 parts of histidine, 0.3-3 parts of thioglycollic acid, 0.5-6 parts of phytic acid and 0.1-2 parts of ferric nitrate.
  3. 3. The composite adsorption material for the synergistic removal of ammonia and sulfides in the environment of pets according to claim 1 or 2, characterized in that the preparation method of the synergistic modified porous inorganic matrix material comprises the following steps: (1) Mixing zeolite, attapulgite and dopamine, performing dispersion treatment and performing surface oxidation self-polymerization reaction to obtain a pretreated matrix; (2) Adding histidine and ferric nitrate into the pretreated matrix to make the histidine and ferric nitrate carry out coordination reaction on the surface of the matrix to obtain a modified matrix containing a coordination structure; (3) Thioglycollic acid and phytic acid are added into the modified matrix, so that a sulfur binding structure and a proton transfer structure are constructed on the surface of the matrix, and the synergistic modified porous inorganic matrix material is obtained.
  4. 4. The composite adsorption material for the synergistic removal of ammonia and sulfide in the environment of pets according to claim 3, wherein the reaction condition in the step (1) is that a tris buffer solution is adopted to adjust the pH of a system under the condition that the pH is 8.0-9.0, and the reaction is carried out for 3-5 hours under the condition that the temperature is 25-35 ℃ and stirring is carried out at 300-600 rpm, so that the oxidation and the autopolymerization of dopamine occur.
  5. 5. The composite adsorption material for the synergistic removal of ammonia and sulfides in the environment of pets according to claim 3, wherein the reaction condition in the step (2) is that stirring reaction is carried out for 2-3 hours at 200-500 rpm under the condition that the temperature is 35-50 ℃, and the molar ratio of histidine to ferric nitrate is 1 (0.5-2).
  6. 6. The composite adsorption material for the synergistic removal of ammonia and sulfides in the environment of pets according to claim 3, wherein the reaction condition of the step (3) is that a phosphate buffer solution is adopted to adjust the pH of a system under the condition that the pH is 6.5-7.5, stirring reaction is carried out for 3-4 hours at 200-400 rpm under the condition that the temperature is 45-65 ℃, and the mass ratio of thioglycollic acid to phytic acid is 1 (1-3).
  7. 7. The preparation method of the composite adsorption material for cooperatively removing ammonia and sulfide in the environment of the pet is characterized by comprising the following steps of: S1, adding a synergistically modified porous inorganic matrix material into deionized water for dispersion treatment to obtain uniformly dispersed matrix slurry; S2, adding p-benzoquinone into the matrix slurry to load and act on the surface of the matrix to obtain functional slurry; And S3, sequentially adding zinc chloride, ferric nitrate, sodium carboxymethyl cellulose and polyvinyl alcohol into the functionalized slurry, uniformly mixing, performing molding treatment, and drying to obtain the composite adsorption material.
  8. 8. The method for preparing the composite adsorption material for the synergistic removal of ammonia and sulfide in the environment of pets according to claim 7, wherein the reaction condition in the step S1 is that the synergistic modified porous inorganic matrix material is uniformly dispersed in deionized water under the condition that the temperature is 20-30 ℃ and the stirring and dispersing speed is 300-600 rpm for 30-60 min.
  9. 9. The method for preparing the composite adsorption material for the synergistic removal of ammonia and sulfide in the environment of pets according to claim 7, wherein the reaction condition in the step S2 is that stirring reaction is carried out for 1-3 hours at 200-400 rpm under the condition that the temperature is 25-40 ℃, and the adding amount of p-benzoquinone is 0.5-5% of the mass of the synergistically modified porous inorganic matrix material.
  10. 10. The method for preparing the composite adsorbing material for the synergistic removal of ammonia and sulfide in the environment of pets according to claim 7, wherein the reaction condition in the step S3 is that stirring is carried out for 30-90 min at 200-500 rpm under the condition that the temperature is 30-50 ℃, then forming treatment is carried out in a granulating and forming mode, and drying is carried out for 4-8 h under the condition that the temperature is 80-110 ℃ to obtain the composite adsorbing material.

Description

Composite adsorption material for cooperatively removing ammonia and sulfide in pet environment and preparation method thereof Technical Field The invention relates to the technical field of environmental functional materials and gas purification, in particular to a composite adsorption material for cooperatively removing ammonia and sulfides in the environment of pets and a preparation method thereof. Background With the continuous increase of the number of urban resident pets, the problems of peculiar smell pollution generated in pet litter boxes, dog houses and closed pet spaces are increasingly prominent. The ammonia gas generated by decomposing urine and the hydrogen sulfide generated by anaerobically decomposing feces are the most main two types of peculiar smell gases, and generally exist for a long time along with a high-humidity environment, and have the characteristics of large concentration fluctuation, long duration release time, compound existence and the like. Such gases are not only odorous, but also toxic, and long-term exposure can adversely affect the human respiratory system, pet health, and indoor air quality. At present, the deodorizing materials for pet environment mainly comprise active carbon, zeolite, diatomite and modified products thereof, and the action mechanisms of the deodorizing materials are physical adsorption or simple ion exchange, so that the deodorizing materials have a certain removing effect on ammonia gas, but have limited removing capability on weak polar or easily reducible gases such as hydrogen sulfide. Meanwhile, part of technologies realize the oxidation or neutralization of hydrogen sulfide by loading metal oxides or adding acidic components, but have the problems of poor selectivity, uncontrollable reaction, easiness in secondary pollution and the like. Furthermore, the existing materials are designed for single gas, and lack of structural regulation means for the cooperative removal of ammonia and sulfide, so that synchronous and efficient treatment of the two gases is difficult to realize. In addition, the humidity is generally higher in the actual use environment of the pet, water molecules can preferentially occupy adsorption sites, so that the adsorption capacity of the traditional material is obviously reduced, and meanwhile, active components in the structure are easy to lose or deactivate, so that the service life and the stability of the material are reduced. In view of the above, the prior art still has shortcomings in terms of synergistic removal capability, wet state stability and multi-mechanism coupling, and development of a composite adsorption material capable of constructing a multi-stage functional interface on a porous substrate and simultaneously having ammonia adsorption, sulfide capturing and conversion capabilities is needed to realize efficient and stable removal of complex odor in a pet environment. Disclosure of Invention In order to solve the problems of insufficient co-removal capability of ammonia and sulfide, easy inactivation in a wet environment and single action mechanism of the existing adsorption material in the background technology, the invention aims to provide a composite adsorption material for co-removal of ammonia and sulfide in a pet environment and a preparation method thereof. The preparation method comprises the steps of taking a porous inorganic matrix formed by zeolite and attapulgite as a carrier, constructing an adhesion interface layer on the surface of the porous inorganic matrix through dopamine oxidation self-polymerization, introducing histidine-iron coordination to form enzyme-like active sites, constructing a reversible sulfur capture structure through thioglycollic acid and constructing a proton transfer network through phytic acid, carrying out synergistic modification on the porous matrix, introducing p-benzoquinone as an organic micromolecular function regulator on the basis, and combining zinc chloride, ferric nitrate, sodium carboxymethyl cellulose and polyvinyl alcohol to prepare the composite adsorption material with a multi-level functional interface. According to the invention, through constructing the synergistic effect of the bionic enzyme active site, the dynamic sulfur capture structure and the proton transfer network, the high-efficiency synergistic removal of ammonia and sulfide is realized, and the stability and the recycling performance of the material in a high-humidity environment are obviously improved. The aim of the invention can be achieved by the following technical scheme: The composite adsorption material comprises, by weight, 60-120 parts of a synergistically modified porous inorganic matrix material, 0.5-8 parts of an organic small molecule function regulator, 0.1-2 parts of zinc chloride, 0.1-2 parts of ferric nitrate, 0.2-3 parts of sodium carboxymethyl cellulose, 0.2-3 parts of polyvinyl alcohol and 50-150 parts of deionized water, wherein the synergistically modified por