CN112755754A - Aldehyde-removing water-absorbing resin ball and preparation method thereof - Google Patents
Aldehyde-removing water-absorbing resin ball and preparation method thereof Download PDFInfo
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- 238000002360 preparation method Methods 0.000 title claims abstract description 16
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 67
- 239000002250 absorbent Substances 0.000 claims abstract description 44
- 229910052742 iron Inorganic materials 0.000 claims abstract description 32
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 28
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000002245 particle Substances 0.000 claims abstract description 20
- 238000000034 method Methods 0.000 claims abstract description 17
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- 239000007864 aqueous solution Substances 0.000 claims description 24
- 125000002485 formyl group Chemical class [H]C(*)=O 0.000 claims description 21
- 239000004343 Calcium peroxide Substances 0.000 claims description 12
- LHJQIRIGXXHNLA-UHFFFAOYSA-N calcium peroxide Chemical compound [Ca+2].[O-][O-] LHJQIRIGXXHNLA-UHFFFAOYSA-N 0.000 claims description 12
- 235000019402 calcium peroxide Nutrition 0.000 claims description 12
- 239000001866 hydroxypropyl methyl cellulose Substances 0.000 claims description 10
- 235000010979 hydroxypropyl methyl cellulose Nutrition 0.000 claims description 10
- 229920003088 hydroxypropyl methyl cellulose Polymers 0.000 claims description 10
- UFVKGYZPFZQRLF-UHFFFAOYSA-N hydroxypropyl methyl cellulose Chemical compound OC1C(O)C(OC)OC(CO)C1OC1C(O)C(O)C(OC2C(C(O)C(OC3C(C(O)C(O)C(CO)O3)O)C(CO)O2)O)C(CO)O1 UFVKGYZPFZQRLF-UHFFFAOYSA-N 0.000 claims description 10
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- 238000006243 chemical reaction Methods 0.000 abstract description 29
- 230000000694 effects Effects 0.000 abstract description 27
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- 239000000126 substance Substances 0.000 abstract description 11
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 abstract description 7
- 125000002887 hydroxy group Chemical group [H]O* 0.000 abstract description 5
- 230000007774 longterm Effects 0.000 abstract description 5
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- 230000002045 lasting effect Effects 0.000 abstract description 4
- 239000001569 carbon dioxide Substances 0.000 abstract description 3
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- 238000001179 sorption measurement Methods 0.000 description 18
- 229910001448 ferrous ion Inorganic materials 0.000 description 11
- QMQXDJATSGGYDR-UHFFFAOYSA-N methylidyneiron Chemical compound [C].[Fe] QMQXDJATSGGYDR-UHFFFAOYSA-N 0.000 description 11
- 238000005868 electrolysis reaction Methods 0.000 description 10
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- VTLYFUHAOXGGBS-UHFFFAOYSA-N Fe3+ Chemical compound [Fe+3] VTLYFUHAOXGGBS-UHFFFAOYSA-N 0.000 description 7
- 229910052799 carbon Inorganic materials 0.000 description 7
- 239000000463 material Substances 0.000 description 6
- 229910001447 ferric ion Inorganic materials 0.000 description 5
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 5
- 230000009471 action Effects 0.000 description 4
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- 206010019837 Hepatocellular injury Diseases 0.000 description 1
- 206010023644 Lacrimation increased Diseases 0.000 description 1
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 1
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- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
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- XLYOFNOQVPJJNP-ZSJDYOACSA-N heavy water Substances [2H]O[2H] XLYOFNOQVPJJNP-ZSJDYOACSA-N 0.000 description 1
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- OUUQCZGPVNCOIJ-UHFFFAOYSA-N hydroperoxyl Chemical compound O[O] OUUQCZGPVNCOIJ-UHFFFAOYSA-N 0.000 description 1
- 238000003905 indoor air pollution Methods 0.000 description 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 1
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- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
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Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/72—Organic compounds not provided for in groups B01D53/48 - B01D53/70, e.g. hydrocarbons
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/10—Oxidants
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/10—Inorganic adsorbents
- B01D2253/102—Carbon
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
- B01D2257/708—Volatile organic compounds V.O.C.'s
Abstract
The invention provides an aldehyde-removing water-absorbent resin ball and a preparation method thereof, wherein the aldehyde-removing water-absorbent resin ball comprises high-molecular water-absorbent resin particles, an aldehyde-removing solution is adsorbed on the high-molecular water-absorbent resin particles, and the aldehyde-removing solution is prepared by respectively adding 50-80 g of nano activated carbon, 100-150 g of nano iron, 4-10 g of hydrogen peroxide solution and 50-80 g of nano zero-valent iron into 1-1.5L of water. According to the technical scheme, formaldehyde is adsorbed into the resin balls through the nano activated carbon, nano iron is in contact with the nano activated carbon in a solution, and a large amount of Fe is generated through an anode reaction2+，Fe2+With H in solution2O2The hydroxyl free radicals react with formaldehyde to generate carbon dioxide and water harmless substances, the effect of removing formaldehyde by a chemical reaction method is better, secondary pollution can not occur, the indoor formaldehyde content is obviously reduced, and the formaldehyde removing effect is lasting and long-term effective.
Description
Technical Field
The invention relates to the technical field of environmental protection, and particularly relates to an aldehyde-removing water-absorbing resin ball and a preparation method thereof.
Background
With the development of economy and the acceleration of urbanization, people increasingly demand indoor decoration, and the indoor air pollution of newly decorated environment is more and more concerned. Material for new decorationThe variety is various, the material is different, and many materials or finished products use formaldehyde in the processing process. Formaldehyde is a carcinogen identified by IARC classification. When the formaldehyde reaches 0.06-0.07 mg/m in the air3When it is used, children can suffer slight asthma; up to 0.1mg/m3In time, peculiar smell and uncomfortable feeling are generated; up to 0.5mg/m3It can irritate eyes and cause lacrimation; up to 0.6mg/m3It can cause discomfort or pain in the throat. Higher concentrations can cause nausea, vomiting, cough, chest distress, asthma and even pulmonary edema; up to 30mg/m3When it is used, it will lead to death. Long-term exposure to formaldehyde can cause respiratory dysfunction and hepatotoxic lesions, manifested as hepatocellular injury, and data also indicate that there is a strong relationship between increased probability of leukemia in modern residents and superscript formaldehyde content.
The overproof indoor formaldehyde directly influences people to live in a new environment, and except windowing and ventilation, two means of a physical adsorption method and a chemical reaction method are mainly used for removing formaldehyde at present. The physical adsorption method uses a substance with a porous structure and a high specific surface area to adsorb formaldehyde, thereby achieving the purpose of reducing the concentration of formaldehyde in the air. Substances which have the function of adsorbing formaldehyde in the current market comprise activated carbon, diatom ooze, activated alumina, molecular sieve and the like. The adsorption efficiency of different substances is greatly different, and the adsorption efficiency of the same substance also shows different adsorption capacity due to different surface properties and production processes. The physical adsorption method is simple and easy to use, but has limited capability of reducing the concentration of formaldehyde, the carrier is easy to saturate, and secondary pollution can be generated by desorption after saturation.
Disclosure of Invention
The invention mainly aims to provide an aldehyde-removing water-absorbing resin ball, and aims to solve the problem that the existing aldehyde-removing technology is poor in formaldehyde-absorbing effect.
In order to achieve the purpose, the invention provides an aldehyde-removing water-absorbent resin ball which comprises high-molecular water-absorbent resin particles, wherein an aldehyde-removing solution is adsorbed on the high-molecular water-absorbent resin particles, and the aldehyde-removing solution is prepared by respectively adding 50-80 g of nano activated carbon, 100-150 g of nano iron and 4-10 g of hydrogen peroxide solution into 1-1.5L of water.
Optionally, the preparation method of the aldehyde removing solution comprises the step of adding 50-80 g of nano zero-valent iron into 1-1.5L of water.
Optionally, the preparation method of the aldehyde removing solution comprises the step of adding 2-6 g of hydroxypropyl methyl cellulose into 1-1.5L of water.
Optionally, the preparation method of the aldehyde removing solution comprises the step of adding 4-8 g of nano calcium peroxide into 1-1.5L of water.
Optionally, the mass ratio of the sum of the mass of the nano iron and the nano zero-valent iron to the mass of the nano activated carbon is 2.5-3.5: 1.
Optionally, the pH value of the aldehyde removal solution is 4-9.
Optionally, the aldehyde-removing solution is a suspension solution.
Optionally, the pH value of the aldehyde removal solution is 4-6.
The invention also provides a preparation method of the aldehyde-removing water-absorbent resin ball, which comprises the following steps:
(1) providing 1-1.5L of aqueous solution, and adjusting the pH value of the aqueous solution to 4-9;
(2) adding 100-150 g of nano iron, 50-80 g of nano zero-valent iron, 50-80 g of nano activated carbon, 4-10 g of hydrogen peroxide solution, 4-8 g of nano calcium peroxide and 2-6 g of hydroxypropyl methyl cellulose into the aqueous solution, uniformly stirring by using a high-speed dispersion machine, wherein the operation speed is more than 1000r/min, and obtaining an aldehyde-removing solution after 3-5 minutes;
(3) and (3) putting 200-250 g of high-molecular water-absorbent resin particles into the aldehyde-removing solution, uniformly stirring, and soaking for 20-40 min to obtain the aldehyde-removing water-absorbent resin balls.
Optionally, the pH of the aqueous solution is 4-6.
The technical scheme of the invention combines an iron-carbon micro-electrolysis method and a Fenton method, wherein the main effects are oxidation reduction and electric adsorption, when nano activated carbon, nano iron and hydrogen peroxide are adsorbed into an aldehyde-removing water-absorbing resin ball in a solution state, the nano activated carbon adsorbs formaldehyde into the resin ball, the nano iron is contacted with the nano activated carbon in the solution, and a large amount of Fe is generated by an anode reaction2+，Fe2+And solutionsH in (1)2O2The hydroxyl free radicals react with formaldehyde to generate carbon dioxide and water harmless substances, and the technical scheme of the invention has better effect of removing formaldehyde by a chemical reaction method and does not generate secondary pollution.
Further, Fe can be repeatedly generated by adding nano zero-valent iron to the aldehyde-removing solution2+By adding calcium peroxide, the reaction can be continued to generate H2O2So that the amount of hydroxyl free radicals (OH) is kept stable, the reaction with formaldehyde can be carried out for a long time, the indoor formaldehyde content is obviously reduced, and the formaldehyde removing effect is durable and effective for a long time.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic flow chart of a preparation method of the aldehyde-removing water-absorbent resin sphere of the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
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 formaldehyde removing water-absorbing resin ball provided by the invention has a better formaldehyde removing effect, does not cause secondary pollution, can obviously reduce the indoor formaldehyde content, and has a lasting and long-term effective formaldehyde removing effect.
In the embodiment of the invention, the aldehyde-removing water-absorbent resin ball comprises high-molecular water-absorbent resin particles, wherein an aldehyde-removing solution is adsorbed on the high-molecular water-absorbent resin particles, and the aldehyde-removing solution is prepared by respectively adding 50-80 g of nano activated carbon, 100-150 g of nano iron and 4-10 g of hydrogen peroxide solution into 1-1.5L of water.
Specifically, the high molecular water-absorbent resin particles are a high molecular electrolyte containing hydrophilic groups and a cross-linked structure, and are a functional high molecular material with a large number of hydrophilic groups. Before water absorption, the polymer chains are mutually close and intertwined together and are mutually crosslinked into a net structure. When contacting with water, water molecules permeate into the interior through capillary action and diffusion action, and finally absorb water which is hundreds of times or even thousands of times heavier than the water molecules.
Specifically, the nano activated carbon has a micropore structure, the radius of micropores is less than 2nm, the pore size distribution is narrow, special pores are in monodispersion distribution, and the structure is formed by micro pores with different sizes. And the nano activated carbon has large specific surface area and high absorption and desorption speed, and is 10-100 times of the particle size of the activated carbon. As the specific surface area increases, the average pore diameter of the pores increases, the pore volume increases, adsorption occurs in the pores, and the pores are filled. The specific surface area is increased, the adsorption capacity is large and is 10 times of that of granular activated carbon, and the formaldehyde in the air is adsorbed into the high-molecular water-absorbent resin particles by adopting the nano activated carbon for chemical reaction.
Specifically, the nano-iron is iron formed by stacking iron atoms one by one according to a nano level, and has no difference in physical properties and chemical properties, for example, the nano-iron can spontaneously combust in air, and is corrosion resistant.
Specifically, when the nano-iron is immersed in the aqueous solution, a complete micro-battery loop is formed, and an internal electrolysis reaction, namely micro-electrolysis, is formed. The nano iron is also contacted with nano active carbon in the water solution, and the formed large primary battery is the iron-carbon micro-electrolysis method.
The iron-carbon micro-electrolysis technology mainly utilizes the reducibility of iron and the electrochemistry of iron. Pure iron is used as an anode of a primary battery, activated carbon is used as a cathode of the primary battery, electrochemical reaction is carried out in an aqueous solution containing an acidic electrolyte, so that iron is changed into ferrous ions to enter the solution, and the reaction process is as follows:
anode (Fe): Fe-2e → Fe2+E(Fe/Fe2+)。
In the reaction, nascent Fe is produced2+，Fe2+And removing H in the aldehyde solution2O2The hydroxyl radical has strong oxidizing property, is higher than other oxidants, can remove most pollutants, and has the following reaction formula:
Fe2++H++H2O2→Fe3++H2O+OH
the hydroxyl radical (. OH) is active oxygen molecule with the strongest activity and attack, can generate different types of chemical reactions with almost all biomolecules, organic matters or inorganic matters, has very high reaction rate constant, electronegativity and extremely strong oxidation electrode potential (2.8V), is the strongest inorganic oxidant except fluorine gas, and has the oxidation capability far exceeding that of common chemical oxidants. The hydroxyl radical has extremely strong oxidizing property, does not generate harmful substances when reacting with formaldehyde, and has the following reaction formula:
6OH+CH3OH→CO2↑+5H2O
the technical scheme of the invention combines an iron-carbon micro-electrolysis method and a Fenton method, wherein the main effects are oxidation reduction and electric adsorption, when nano activated carbon, nano iron and hydrogen peroxide are adsorbed into an aldehyde-removing water-absorbing resin ball in a solution state, the nano activated carbon adsorbs formaldehyde into the resin ball, the nano iron is contacted with the nano activated carbon in the solution, and a large amount of Fe is generated by an anode reaction2+，Fe2+With H in solution2O2The hydroxyl free radicals react with formaldehyde to generate carbon dioxide and water harmless substances, and the technical scheme of the invention has better formaldehyde removal effect through a chemical reaction method, does not generate secondary pollution, can obviously reduce the indoor formaldehyde content, and has lasting and long-term effective formaldehyde removal effect.
Optionally, the preparation method of the aldehyde removing solution comprises the step of adding 50-80 g of nano zero-valent iron into 1-1.5L of water.
Specifically, nanoscale zero-valent iron (NZVI) refers to zero-valent iron particles with a particle diameter in the range of 1nm to 100nm, and has the characteristics of large specific surface area, strong reducibility and the like. Compared with a macroscopic zero-valent iron material, the material has special properties such as surface effect, volume effect, macroscopic quantum tunneling effect and the like.
Specifically, nanometer zero-valent iron (Fe) is added0) On one hand, the iron-carbon micro-electrolysis system can be formed together with nano iron to generate ferrous ions, and on the other hand, the iron-carbon micro-electrolysis system has the advantages that the ferrous ions (Fe) can be repeatedly generated through chemical reaction2+) Thereby continuously providing ferrous ions for the aldehyde-removing water-absorbing resin ball and ensuring the continuous reaction. It is reacted with hydrogen peroxide (H)2O2) And hydrogen ions (H) in water+) The reaction generates ferrous ion (Fe)2+) The reaction process is shown in the following formula.
Fe0+H2O2+2H+→Fe2++2H2O
Ferrous ion (Fe)2+) Then catalyzing hydrogen peroxide (H)2O2) Decomposition yields (. OH), see the following formula.
Fe2++H2O2→Fe3++·OH+OH-
Generated ferric ion Fe3+And H2O2And reduced to Fe2+And hydroperoxyl radical (. OOH), ensuring Fe2+The reaction can be continuously carried out, and the reaction process is shown in the following formula.
Fe3++H2O2→Fe2++H++·OOH
Optionally, the preparation method of the aldehyde removing solution comprises the step of adding 2-6 g of hydroxypropyl methyl cellulose into 1-1.5L of water.
Specifically, as the particle size of the nano zero-valent iron is too small and easy to agglomerate, in order to disperse uniformly and improve the activity and reaction performance, a macromolecular stabilizer hydroxypropyl methyl cellulose needs to be added.
Optionally, the preparation method of the aldehyde removing solution comprises the step of adding 4-8 g of nano calcium peroxide into 1-1.5L of water.
In particular, calcium peroxide and H+The reaction may produce H2O2Reacting with water to slowly generate oxygen and H-The reaction may proceed to H2O2The reaction process is shown in the following formula.
CaO2+2H+→Ca2++H2O2
O2+2H-+2e-→H2O2
The iron-carbon micro-electrolysis and Fenton method combined process remarkably enhances the formaldehyde removal effect, purifies the indoor formaldehyde through the strong oxidizing property of the iron-carbon micro-electrolysis-Fenton method when the water-absorbing resin ball is rich in water, and simultaneously, the nano zero-valent iron (Fe)0) Can repeatedly generate ferrous ions (Fe)2+) The calcium peroxide can continuously react to generate H2O2So that the amount of hydroxyl free radicals (OH) is kept stable, the reaction with formaldehyde can be carried out for a long time, the indoor formaldehyde content is obviously reduced, and the formaldehyde removing effect is durable and effective for a long time.
Preferably, the mass ratio of the sum of the mass of the nano iron and the nano zero-valent iron to the nano activated carbon is 2.5-3.5: 1.
Specifically, under the condition of the ratio, iron and activated carbon can be fully contacted and simultaneously soaked in the aqueous solution to generate as many primary batteries as possible, so that the reaction is promoted, and the generation effect of ferrous ions is improved. If the iron content in the aldehyde-removing solution is too high, the excessive iron will react with the active H+Replacement occurs, and the electrode action in water is not participated any more; if the content of iron is too small, the number of tiny primary batteries in water can be reduced, and the oxidation-reduction reaction and the electric adsorption effect are directly influenced, so that the ferrous ion generation efficiency of an iron-carbon micro-electrolysis system is greatly reduced.
Optionally, the pH value of the aldehyde removal solution is 4-9. More preferably, the pH value of the aldehyde removing solution is 4-6.
Specifically, the PH value of the aldehyde removing solution system is not too large or too small, when the PH value is 6, the formaldehyde removal rate can reach the maximum, and the aldehyde removing effect is most obvious; when the pH value is more than 6, the solution system gradually changes into an alkaline environment, and ferrous ions in the system can generate ferric iron and OH in the system-Flocculent precipitate is generated, so that the whole iron-carbon micro-electrolysis-Fenton system loses strong oxidation, and the formaldehyde removal rate is greatly reduced.
The present invention also provides a method for preparing the aldehyde-removing water-absorbent resin beads, referring to fig. 1, comprising:
(1) providing 1-1.5L of aqueous solution, and adjusting the pH value of the aqueous solution to 4-9;
(2) adding 100-150 g of nano iron, 50-80 g of nano zero-valent iron, 50-80 g of nano activated carbon, 4-10 g of hydrogen peroxide solution, 4-8 g of nano calcium peroxide and 2-6 g of hydroxypropyl methyl cellulose into the aqueous solution, uniformly stirring by using a high-speed dispersion machine, wherein the operation speed is more than 1000r/min, and obtaining an aldehyde-removing solution after 3-5 minutes;
(3) and (3) putting 200-250 g of high-molecular water-absorbent resin particles into the aldehyde-removing solution, uniformly stirring, and soaking for 20-40 min to obtain the aldehyde-removing water-absorbent resin balls.
Optionally, the pH of the aqueous solution is 4-6.
Embodiments of the present invention will be described in detail below with reference to specific examples, but those skilled in the art will appreciate that the following examples are only illustrative of the present invention and should not be construed as limiting the scope of the present invention. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
Example 1
The preparation method of the aldehyde-removing water-absorbent resin beads of example 1 is as follows:
(1) providing 1L of aqueous solution, and adjusting the pH of the aqueous solution to 4;
(2) adding 100g of nano iron, 50g of nano zero-valent iron, 50g of nano activated carbon, 4g of hydrogen peroxide solution, 4g of nano calcium peroxide and 2g of hydroxypropyl methyl cellulose into the aqueous solution, uniformly stirring by using a high-speed dispersion machine, wherein the running speed is more than 1000r/min, and obtaining an aldehyde-removing solution after 3-5 minutes;
(3) 200g of the high molecular water-absorbent resin particles are put into the aldehyde-removing solution, stirred uniformly and soaked for 30min to obtain the aldehyde-removing water-absorbent resin balls in the embodiment 1.
Example 2
The preparation method of the aldehyde-removing water-absorbent resin beads of example 2 is as follows:
(1) providing 11.25L of an aqueous solution, and adjusting the pH of the aqueous solution to be 6;
(2) adding 125g of nano iron, 65g of nano zero-valent iron, 65g of nano activated carbon, 8g of hydrogen peroxide solution, 6g of nano calcium peroxide and 5g of hydroxypropyl methyl cellulose into the aqueous solution, uniformly stirring by using a high-speed dispersion machine, wherein the running speed is more than 1000r/min, and obtaining an aldehyde-removing solution after 3-5 minutes;
(3) 225g of high molecular water-absorbent resin particles are put into the aldehyde-removing solution, stirred uniformly and soaked for 30min to obtain the aldehyde-removing water-absorbent resin balls of the embodiment 2.
Example 3
The preparation method of the aldehyde-removing water-absorbent resin beads of example 3 is as follows:
(1) providing 1.5L of aqueous solution, and adjusting the pH of the aqueous solution to 9;
(2) adding 150g of nano iron, 80g of nano zero-valent iron, 80g of nano activated carbon, 10g of hydrogen peroxide solution, 8g of nano calcium peroxide and 6g of hydroxypropyl methyl cellulose into the aqueous solution, uniformly stirring by using a high-speed dispersion machine, wherein the running speed is more than 1000r/min, and obtaining an aldehyde-removing solution after 3-5 minutes;
(3) 250g of the high molecular water-absorbent resin particles are put into the aldehyde-removing solution, stirred uniformly and soaked for 30min to obtain the aldehyde-removing water-absorbent resin balls in the embodiment 3.
Comparative example
Comparative example 50g/m2The activated carbon was arranged in an amount of about 1250g depending on the size of the room.
Test examples
After the aldehyde-removing water-absorbent resin beads of the above examples were prepared, they were combinedComparative examples formaldehyde removal performance tests were performed separately. Selecting four rooms which are just finished soon, wherein the room area is 25m2The decoration is provided with wooden furniture and sofas, the wall surface is pasted with wallpaper, the suspended ceiling is sprayed with white emulsion paint, the floor is paved with wood floors, the indoor formaldehyde content is measured, and the numerical value is recorded. The prepared aldehyde-removing water-absorbent resin balls are respectively placed in different rooms, points are uniformly distributed, the indoor formaldehyde content is recorded after 4 hours, 8 hours, 12 hours, 24 hours and 36 hours, and the data are shown in the following table 1.
TABLE 1 results of formaldehyde removal test for each of the examples and comparative examples
It can be known from the data of table 2, the effect is obvious in earlier stage with the indoor formaldehyde of active carbon adsorption purification, but the action time is shorter relatively, this is mainly because, active carbon purifies formaldehyde is the highly dispersed porous structure who utilizes active carbon, have huge adsorption surface area, have adsorption to formaldehyde, and adsorption purification effect mainly depends on adsorption rate, adsorption process divide into outer diffusion, interior diffusion and absorption etc. but the formaldehyde that adsorbs to active carbon is easy to escape, and inside porous structure reaches the saturation after active carbon adsorbs the certain time, thereby influence its adsorption purification effect, consequently later stage active carbon adsorbs the effect of formaldehyde not good.
According to the technical scheme, the PH value of the aldehyde removing solution of the aldehyde removing water absorbent resin ball is not too large or too small, when the PH value is 6, the formaldehyde removal rate can be maximized, and the aldehyde removing effect is most obvious; when the pH value is more than 6, the solution system gradually changes into an alkaline environment, and ferrous ions in the system can generate ferric iron and react with OH in the system-Flocculent precipitate is generated, so that the whole iron-carbon micro-electrolysis-Fenton system loses strong oxidation, and the formaldehyde removal rate is greatly reduced. Therefore, embodiment 2 of the present invention is the most preferable embodiment.
Compared with a comparative example, the formaldehyde-removing water-absorbing resin ball in the technical scheme can effectively reduce the indoor formaldehyde content, and the formaldehyde is generated into a substance harmless to a human body through a chemical reaction, so that the formaldehyde-removing water-absorbing resin ball is a relatively thorough method for removing the formaldehyde, and has a lasting and long-term effective formaldehyde-removing effect.
The above description is only an alternative embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. The aldehyde-removing water-absorbent resin ball is characterized by comprising high-molecular water-absorbent resin particles, wherein an aldehyde-removing solution is adsorbed on the high-molecular water-absorbent resin particles, and the aldehyde-removing solution is prepared by adding 50-80 g of nano activated carbon, 100-150 g of nano iron and 4-10 g of hydrogen peroxide solution into 1-1.5L of water respectively.
2. The water-absorbent resin sphere for removing aldehyde according to claim 1, wherein the aldehyde-removing solution is prepared by adding 50-80 g of nano zero-valent iron to 1-1.5L of water.
3. The water-absorbent resin beads for removing aldehyde according to claim 2, wherein the aldehyde-removing solution is prepared by further adding 2 to 6g of hydroxypropyl methylcellulose to 1 to 1.5L of water.
4. The water-absorbent resin ball for removing aldehyde according to claim 3, wherein the aldehyde-removing solution is prepared by adding 4-8 g of nano calcium peroxide into 1-1.5L of water.
5. The aldehyde-removing water-absorbent resin ball as claimed in claim 4, wherein the mass ratio of the sum of the mass of the nano iron and the nano zero-valent iron to the nano activated carbon is 2.5-3.5: 1.
6. The water-absorbent resin beads for removing aldehyde according to claim 5, wherein the pH of the aldehyde-removing solution is 4 to 9.
7. The aldehyde-removing water-absorbent resin sphere according to claim 6, wherein the aldehyde-removing solution is a suspension solution.
8. The water-absorbent resin beads for removing aldehyde according to claim 7, wherein the pH of the aldehyde-removing solution is 4 to 6.
9. A preparation method of aldehyde-removing water-absorbing resin balls is characterized by comprising the following steps:
(1) providing 1-1.5L of aqueous solution, and adjusting the pH value of the aqueous solution to 4-9;
(2) adding 100-150 g of nano iron, 50-80 g of nano zero-valent iron, 50-80 g of nano activated carbon, 4-10 g of hydrogen peroxide solution, 4-8 g of nano calcium peroxide and 2-6 g of hydroxypropyl methyl cellulose into the aqueous solution, uniformly stirring by using a high-speed dispersion machine, wherein the operation speed is more than 1000r/min, and obtaining an aldehyde-removing solution after 3-5 minutes;
(3) and (3) putting 200-250 g of high-molecular water-absorbent resin particles into the aldehyde-removing solution, uniformly stirring, and soaking for 20-40 min to obtain the aldehyde-removing water-absorbent resin balls.
10. The method for preparing the aldehyde-removing water-absorbent resin beads according to claim 9, wherein the aqueous solution has a pH of 4 to 6.
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Application publication date: 20210507 |