Adsorbing material for monitoring atmospheric pollutants as well as preparation method and application of adsorbing material

Abstract

The invention provides an adsorption material for monitoring atmospheric pollutants as well as a preparation method and application thereof, and belongs to the technical field of adsorbents. The adsorption material for monitoring the atmospheric pollutants comprises modified polyurethane foam and filler, the modified polyurethane foam is prepared by loading metal on polyurethane foam for modification; the metals are Fe, Zn and Mn; the filler is XAD-4 and activated carbon. The adsorption material for monitoring the atmospheric pollutants is large in static adsorption capacity, high in dynamic adsorption removal rate, long in effective time and good in hydrophobicity. And the preparation method is simple and efficient, and is beneficial to large-scale popularization.

Description

Technical Field

[0001] The present invention provides an adsorption material for monitoring air pollutants, a preparation method thereof, and an application thereof, belonging to the technical field of adsorbents. Background Art

[0002] VOCs (volatile organic compounds) are toxic, flammable and explosive, and are precursors of haze formation. They will seriously damage the ecological environment and endanger human health, and are also important causes of air pollution. VOCs participate in the formation of ozone and secondary aerosols in the atmospheric environment, and have an important impact on regional atmospheric ozone pollution and PM2.5 pollution. Most VOCs have unpleasant special odors and have toxicity, irritation, teratogenicity and carcinogenic effects. In particular, benzene, toluene and formaldehyde will cause great harm to human health and are important precursors of urban haze and photochemical smog.

[0003] Fan Yingge, in the research on the preparation and application of porous materials for efficient adsorption of aromatic volatile gases (DOI: 10.16584 / j.cnki.issn1671-5381.2021.05.022), disclosed a method for preparing a gel-like emulsion using polydimethylsiloxane with alkenyl bonds at both ends and Tween-80 as a stabilizer, and using styrene and divinylbenzene as a continuous phase, and obtaining a novel porous material by polymerization using this as a template. It has a highly interconnected porous network structure inside, the porosity can reach 85%, and it shows good adsorption performance for aromatic gases such as benzene, toluene, aniline, and styrene. The static adsorption amounts are 467 mg / g, 650 mg / g, 700 mg / g, and 432 mg / g respectively, and there is still room for further improvement.

[0004] Chinese Patent CN103418354B disclosed an adsorption material for collecting persistent organic pollutants (POPs) in ambient air, which is prepared from polyurethane foam and XAD-2 materials. It claims that the sampling time is 4 months and the sampling volume can reach 400 m 3 However, the adsorption performance of the adsorption material of this invention was not tested, and its dynamic and static adsorption performances and the adsorption performance for volatile organic compounds are unknown.

[0005] Tang Chao, in the research on polymer resin composites and their adsorption performance for atmospheric volatile organic compounds (DOI: 10.16247 / j.cnki.23-1171 / tq.20231249), disclosed a ZIF-8 / PDVB composite material for adsorbing atmospheric volatile pollutants. Its static adsorption amount is 1.60 g / g. During dynamic adsorption, the 100% removal rate only lasts for 200 s, and there is still room for improvement. Summary of the Invention

[0006] To solve the deficiencies existing in the prior art, the present invention provides an adsorption material for monitoring air pollutants, its preparation method and application. It has a large static adsorption capacity, a high dynamic adsorption removal rate, and good hydrophobicity, and can effectively adsorb harmful volatile organic compounds.

[0007] To achieve the above object, the technical solution adopted by the present invention is as follows:

[0008] On the one hand, the present invention provides an adsorption material for monitoring air pollutants, including modified polyurethane foam and fillers; the modified polyurethane foam is: polyurethane foam loaded with metal modification; the metal is Fe, Zn, and Mn; the fillers are XAD-4 and activated carbon.

[0009] Further, the mass ratio of the modified polyurethane foam to the fillers is 1:(0.1 - 0.4).

[0010] Preferably, the mass ratio of the modified polyurethane foam to the fillers is 1:(0.26 - 0.4).

[0011] More preferably, the mass ratio of the modified polyurethane foam to the fillers is 1:0.4.

[0012] Further, the density of the polyurethane foam is: 18 - 23 kg / m 3 .

[0013] Further, the metal is Fe, Zn, and Mn with a molar ratio of (1 - 3):(0.2 - 0.5):(0.1 - 0.2).

[0014] Preferably, the metal is Fe, Zn, and Mn with a molar ratio of (2 - 3):(0.3 - 0.5):0.2.

[0015] More preferably, the metal is Fe, Zn, and Mn with a molar ratio of 3:0.5:0.2.

[0016] Further, the loading amount of the metal compound is 0.5 - 1.9% of the modified polyurethane foam.

[0017] Preferably, the loading amount of the metal compound is 1.3 - 1.9% of the modified polyurethane foam.

[0018] Further, the mass ratio of XAD-4 to activated carbon is (1 - 2):(1 - 2).

[0019] Preferably, the mass ratio of XAD-4 to activated carbon is 2:(1 - 2).

[0020] Further, the specific surface area of XAD-4 is 750 - 850 m 2 / g.

[0021] Further, the specific surface area of the activated carbon is 400 - 1400 m 2 / g.

[0022] Preferably, the XAD-4 is 100 - 200 mesh.

[0023] In a second aspect, the present invention provides a method for preparing an adsorption material for monitoring atmospheric pollutants, comprising the following steps:

[0024] (1) Immerse the polyurethane foam in an aqueous solution of a metal salt, adjust the pH to alkaline with an alkali, heat and react, rinse and dry to obtain a modified polyurethane foam;

[0025] (2) Mix XAD-4 and activated carbon uniformly in a solvent to obtain a suspension;

[0026] (3) Immerse the modified polyurethane foam prepared in step (1) in the suspension obtained in step (2), and then dry.

[0027] Further, the metal salt in step (1) is at least one of the chloride, nitrate, sulfate, and acetate salts of the metal; the molar concentration of the metal in the aqueous solution is 0.5 - 1.5 mol / L; the alkali is at least one of ammonia water, sodium hydroxide, and potassium hydroxide; the temperature of the heating reaction is 80 - 100 °C, and the time is 5 - 10 h.

[0028] Further, the solvent in step (2) is at least one of water and ethanol; in the suspension, the total mass concentration of XAD-4 and activated carbon is 3 - 5 g / L.

[0029] Further, the impregnation and drying operations in step (3) are repeated 2 - 3 times; the impregnation time is 40 - 60 s.

[0030] Preferably, the impregnation further includes ultrasonic treatment.

[0031] In a third aspect, the present invention provides the application of the adsorption material for monitoring atmospheric pollutants in adsorbing atmospheric pollutants.

[0032] Preferably, the atmospheric pollutants are harmful volatile organic compounds.

[0033] In a fourth aspect, the present invention provides the application of the combined use of a modified polyurethane, XAD-4, and activated carbon in improving the adsorption efficiency and hydrophobicity of the adsorption material.

[0034] In a fifth aspect, an adsorbent includes the adsorption material for monitoring atmospheric pollutants.

[0035] Sixth aspect, an air sampling device, comprising an adsorption material for monitoring air pollutants.

[0036] The beneficial effects of the present invention are as follows:

[0037] In the present invention, polyurethane foam is modified by a specific metal, and at the same time, by adjusting the dosage relationship between XAD-4 and activated carbon, a filler is obtained, and the two are combined by the preparation method of the present invention to obtain an adsorption material for monitoring air pollutants. The static adsorption capacity is large, the dynamic adsorption removal rate is high and the effective time is long, and at the same time, the hydrophobicity is good. And the preparation method of the present invention is simple and efficient, which is helpful for large-scale promotion. Description of the drawings

[0038] Figure 1 For the toluene removal rates of Examples 1-3.

[0039] Figure 2 For the toluene removal rates of Comparative Examples 1-8. Detailed implementation manners

[0040] In order to make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, the present invention will be further clarified below with reference to specific embodiments. However, the following embodiments are only the preferred embodiments of the present invention, not all of them. Based on the embodiments in the implementation manners, other embodiments obtained by those skilled in the art without creative efforts all belong to the protection scope of the present invention. It is worth noting that the raw materials used in the present invention are all ordinary commercially available products, and no specific limitation is made on their sources. The technical and scientific terms used in the embodiments have the meanings commonly understood by those of ordinary skill in the technical field to which the present invention belongs.

[0041] The present invention does not limit the sources of the raw materials used. Unless otherwise specified, the raw materials used in the present invention are all ordinary commercially available products in the technical field of the present invention.

[0042] Table 1 shows the sources of some materials of the present invention.

[0043] Table 1

[0044] Name Manufacturer XAD-4 Shanghai Yuanye Bio-Technology Co., Ltd. / AMBERLITE XAD 4 Polyurethane foam <![CDATA[Jiasheng Sponge / High-density Foam Sponge (density 18kg / m 3 )]]> Activated carbon J&K Scientific

[0045] I. Examples and comparative examples

[0046] Example 1 An adsorption material for monitoring air pollutants

[0047] According to the molar ratio of Fe, Zn and Mn of 1:0.2:0.1, ferric chloride, zinc chloride and manganese chloride are weighed and configured into a metal salt solution with a molar concentration of 0.5 mol / L.

[0048] (1) Immerse the polyurethane foam in an aqueous solution of metal salt, adjust the pH to 11 with ammonia water, heat at 80 °C for 5 h, rinse and dry to obtain the modified polyurethane foam; the metal compound loading of the modified polyurethane foam is 0.5%.

[0049] (2) Mix XAD-4 and activated carbon in water at a mass ratio of 1:2 and a total mass concentration of 3 g / L to obtain a suspension.

[0050] (3) Immerse the modified polyurethane foam in the suspension and sonicate for 40 s, then dry, repeat 3 times to obtain the adsorption material for monitoring air pollutants in Example 1, which is 10% heavier than the modified polyurethane foam.

[0051] Example 2 An adsorption material for monitoring air pollutants

[0052] Weigh ferric chloride, zinc chloride and manganese chloride according to the molar ratio of Fe, Zn and Mn of 3:0.5:0.2, and prepare a metal salt solution with a molar concentration of 1.5 mol / L.

[0053] (1) Immerse the polyurethane foam in an aqueous solution of metal salt, adjust the pH to 11 with ammonia water, heat at 100 °C for 10 h, rinse and dry to obtain the modified polyurethane foam; the metal compound loading of the modified polyurethane foam is 1.9%.

[0054] (2) Mix XAD-4 and activated carbon in water at a mass ratio of 2:1 and a total mass concentration of 5 g / L to obtain a suspension.

[0055] (3) Immerse the modified polyurethane foam in the suspension and sonicate for 60 s, then dry, repeat 3 times to obtain the adsorption material for monitoring air pollutants in Example 2, which is 40% heavier than the modified polyurethane foam.

[0056] Example 3

[0057] Weigh ferric chloride, zinc chloride and manganese chloride according to the molar ratio of Fe, Zn and Mn of 2:0.3:0.2, and prepare a metal salt solution with a molar concentration of 1.2 mol / L.

[0058] (1) Immerse the polyurethane foam in an aqueous solution of metal salt, adjust the pH to 11 with ammonia water, heat at 90 °C for 8 h, rinse and dry to obtain the modified polyurethane foam; the metal compound loading of the modified polyurethane foam is 1.3%.

[0059] (2) Mix XAD-4 and activated carbon in water at a mass ratio of 1:1 and a total mass concentration of 4 g / L to obtain a suspension.

[0060] (3) Immerse the modified polyurethane foam in the suspension and sonicate for 50 s, then dry it. Repeat this process 3 times to obtain the adsorption material for monitoring atmospheric pollutants in Example 3, which has a 26% weight gain compared to the modified polyurethane foam.

[0061] Comparative Example 1

[0062] Compared with Example 2, the polyurethane foam was not modified.

[0063] (1) Mix XAD-4 and activated carbon in water at a mass ratio of 2:1 and a total mass concentration of 5 g / L to obtain a homogeneous suspension.

[0064] (3) Immerse the polyurethane foam in the suspension and sonicate for 60 s, then dry it. Repeat this process 3 times to obtain the adsorption material for monitoring atmospheric pollutants in Comparative Example 1, which has a 40% weight gain compared to the modified polyurethane foam.

[0065] Comparative Example 2

[0066] Compared with Example 2, only Fe was used to modify the polyurethane foam.

[0067] Weigh ferric chloride and prepare a metal salt solution with a molar concentration of 1.5 mol / L.

[0068] (1) Immerse the polyurethane foam in an aqueous solution of the metal salt, adjust the pH to 11 with ammonia water, heat at 100 °C for 10 h, rinse and dry to obtain the modified polyurethane foam; the metal compound loading of the modified polyurethane foam is 1.8%.

[0069] (2) Mix XAD-4 and activated carbon in water at a mass ratio of 2:1 and a total mass concentration of 5 g / L to obtain a homogeneous suspension.

[0070] (3) Immerse the modified polyurethane foam in the suspension and sonicate for 60 s, then dry it. Repeat this process 3 times to obtain the adsorption material for monitoring atmospheric pollutants in Comparative Example 2, which has a 40% weight gain compared to the modified polyurethane foam.

[0071] Comparative Example 3

[0072] Compared with Example 2, XAD-4 was replaced with XAD-2.

[0073] Weigh ferric chloride, zinc chloride and manganese chloride according to the molar ratio of Fe, Zn and Mn of 3:0.5:0.2 and prepare a metal salt solution with a molar concentration of 1.5 mol / L.

[0074] (1) Immerse the polyurethane foam in an aqueous solution of the metal salt, adjust the pH to 11 with ammonia water, heat at 100 °C for 10 h, rinse and dry to obtain the modified polyurethane foam; the metal compound loading of the modified polyurethane foam is 1.9%.

[0075] (2) Mix XAD-2 and activated carbon evenly in water at a mass ratio of 2:1 and a total mass concentration of 5 g / L to obtain a suspension;

[0076] (3) Immerse the modified polyurethane foam in the suspension and sonicate for 60 s, then dry it. Repeat this process 3 times to obtain the adsorption material for monitoring air pollutants in Comparative Example 3, which has a 40% weight gain compared to the modified polyurethane foam.

[0077] Comparative Example 4

[0078] Compared with Example 2, the mass ratio of the modified polyurethane foam to the filler is 1:0.5.

[0079] Weigh ferric chloride, zinc chloride and manganese chloride according to the molar ratio of Fe, Zn and Mn of 3:0.5:0.2, and prepare a metal salt solution with a molar concentration of 1.5 mol / L.

[0080] (1) Immerse the polyurethane foam in an aqueous solution of the metal salt, adjust the pH to 11 with ammonia water, heat at 100 °C for 10 h, rinse and dry to obtain the modified polyurethane foam; the metal compound loading of the modified polyurethane foam is 1.9%.

[0081] (2) Mix XAD-4 and activated carbon evenly in water at a mass ratio of 2:1 and a total mass concentration of 7 g / L to obtain a suspension;

[0082] (3) Immerse the modified polyurethane foam in the suspension and sonicate for 60 s, then dry it. Repeat this process 3 times to obtain Comparative Example 4, which has a 50% weight gain compared to the modified polyurethane foam.

[0083] Comparative Example 5

[0084] Compared with Example 2, the molar ratio of Fe, Zn and Mn is 3:1:1.

[0085] Weigh ferric chloride, zinc chloride and manganese chloride according to the molar ratio of Fe, Zn and Mn of 3:1:1, and prepare a metal salt solution with a molar concentration of 1.5 mol / L.

[0086] (1) Immerse the polyurethane foam in an aqueous solution of the metal salt, adjust the pH to 11 with ammonia water, heat at 100 °C for 10 h, rinse and dry to obtain the modified polyurethane foam; the metal compound loading of the modified polyurethane foam is 2%.

[0087] (2) Mix XAD-4 and activated carbon evenly in water at a mass ratio of 2:1 and a total mass concentration of 5 g / L to obtain a suspension;

[0088] (3) Immerse the modified polyurethane foam in the suspension and sonicate for 60 s, then dry it. Repeat this process 3 times to obtain Comparative Example 5, which has a 40% weight gain compared to the modified polyurethane foam.

[0089] Comparative Example 6

[0090] Compared with Example 2, the loading amount of the metal compound is 3.1% of the modified polyurethane foam.

[0091] According to the molar ratio of Fe, Zn and Mn being 3:0.5:0.2, ferric chloride, zinc chloride and manganese chloride were weighed and configured into a metal salt solution with a molar concentration of 2 mol / L.

[0092] (1) The polyurethane foam was impregnated in an aqueous solution of the metal salt, ammonia water was added to adjust the pH to 11, and the reaction was carried out at 100 °C for 10 h, then rinsed and dried to obtain the modified polyurethane foam; the loading amount of the metal compound in the modified polyurethane foam was 3.1%.

[0093] (2) XAD-4 and activated carbon were mixed evenly in water according to a mass ratio of 2:1 and a total mass concentration of 5 g / L to obtain a suspension;

[0094] (3) The modified polyurethane foam was impregnated in the suspension and ultrasonicated for 60 s, then dried, and repeated 3 times to obtain Comparative Example 6, which was 40% heavier than the modified polyurethane foam.

[0095] Comparative Example 7

[0096] Compared with Example 2, the mass ratio of XAD-4 to activated carbon was 2:0.5.

[0097] According to the molar ratio of Fe, Zn and Mn being 3:0.5:0.2, ferric chloride, zinc chloride and manganese chloride were weighed and configured into a metal salt solution with a molar concentration of 1.5 mol / L.

[0098] (1) The polyurethane foam was impregnated in an aqueous solution of the metal salt, ammonia water was added to adjust the pH to 11, and the reaction was carried out at 100 °C for 10 h, then rinsed and dried to obtain the modified polyurethane foam; the loading amount of the metal compound in the modified polyurethane foam was 1.9%.

[0099] (2) XAD-4 and activated carbon were mixed evenly in water according to a mass ratio of 2:0.5 and a total mass concentration of 5 g / L to obtain a suspension;

[0100] (3) The modified polyurethane foam was impregnated in the suspension and ultrasonicated for 60 s, then dried, and repeated 3 times to obtain Comparative Example 7, which was 40% heavier than the modified polyurethane foam.

[0101] Comparative Example 8

[0102] Compared with Example 2, the mass ratio of XAD-4 to activated carbon was 0.5:2.

[0103] According to the molar ratio of Fe, Zn and Mn being 3:0.5:0.2, weigh ferric chloride, zinc chloride and manganese chloride and prepare a metal salt solution with a molar concentration of 1.5 mol / L.

[0104] (1) Immerse the polyurethane foam in an aqueous solution of the metal salt, adjust the pH to 11 with ammonia water, heat at 100 °C for 10 h, rinse and dry to obtain the modified polyurethane foam; the metal compound loading of the modified polyurethane foam is 1.9%.

[0105] (2) Mix XAD-4 and activated carbon in water according to the mass ratio of 0.5:2 and a total mass concentration of 5 g / L to obtain a suspension.

[0106] (3) Immerse the modified polyurethane foam in the suspension and sonicate for 60 s, then dry, repeat 3 times to obtain Comparative Example 8, which is 40% heavier than the modified polyurethane foam.

[0107] II. Adsorption performance test

[0108] 1. Static adsorption performance

[0109] Place the beaker containing the adsorbate in a closed container, keep the temperature constant at 25 °C, allow the adsorbate to volatilize for 48 h, take 0.2 g of the adsorbent material and place it on a watch glass, then put it into the closed container and ensure that the adsorbate is in full contact with the adsorbent material at 25 °C for 24 h.

[0110] The adsorbates are toluene and water respectively.

[0111] The results are shown in Table 2.

[0112] Table 2

[0113] Static toluene adsorption capacity (g / g) Static water adsorption capacity (g / g) Example 1 2.1 0.33 Example 2 2.4 0.25 Example 3 2.2 0.28 Comparative Example 1 0.37 0.91 Comparative Example 2 0.52 0.98 Comparative Example 3 0.85 0.84 Comparative Example 4 0.74 0.97 Comparative Example 5 0.65 1.1 Comparative Example 6 0.39 0.88 Comparative Example 7 0.77 1.14 Comparative Example 8 0.81 0.78

[0114] In Examples 1-3 of the present invention, in the static adsorption test, the static adsorption capacity of toluene is 2.1 - 2.4 g / g, and the adsorption amount of toluene is large. Water vapor can compete with VOCs for adsorption, resulting in a decrease in the adsorption capacity of VOCs. The static adsorption capacity of water in the present invention is 0.25 - 0.33 g / g, and it has good hydrophobicity.

[0115] In Comparative Example 1, the polyurethane foam was not modified, and its static adsorption capacity of toluene was small and its hydrophobicity was poor.

[0116] In Comparative Example 2, only Fe was used to modify the polyurethane foam, and its static adsorption capacity of toluene was small and its hydrophobicity was poor.

[0117] In Comparative Example 3, XAD-4 was replaced by XAD-2, and its static adsorption capacity of toluene was small and its hydrophobicity was poor.

[0118] In Comparative Example 4, the dosage relationship between the modified polyurethane foam and the filler was changed, and its static adsorption capacity of toluene was small and its hydrophobicity was poor.

[0119] Comparative Example 5: The molar ratio of Fe, Zn and Mn was changed, and its static toluene adsorption capacity was small and its hydrophobicity was poor.

[0120] Comparative Example 6: The loading amount of the modified polyurethane foam metal compound was increased, and its static toluene adsorption capacity was small and its hydrophobicity was poor.

[0121] Comparative Examples 7-8: The relationship between the dosages of XAD-4 and activated carbon was changed, and their static toluene adsorption capacities were small and their hydrophobicities were poor.

[0122] 2. Dynamic adsorption performance

[0123] At 25°C, N2 was purged and bubbled through toluene to form toluene vapor, which was then mixed with dry air, and the toluene concentration was measured by gas chromatography. The adsorption material (0.5 g) was loaded into the adsorption column, and then it was connected to the system gas circuit. When the toluene concentration was stable, the gas circuit was switched to the adsorption column gas circuit for dynamic adsorption evaluation at a flow rate of 0.15 L / min.

[0124] Toluene removal rate (%) = (C0 - C A ) / C0 × 100, where C A is the concentration of the adsorbate in the tail gas and C0 is the initial concentration. The toluene removal rates are shown in Figure 1-2 .

[0125] In Examples 1-3 of the present invention, the time when the toluene removal rate was maintained at 100% was more than 450 s, and the dynamic adsorption performance was excellent.

[0126] In Comparative Examples 1-8, in the initial stage, the toluene adsorption rate could not reach 100%, and then it decreased rapidly, and the dynamic adsorption performance was worse than that of Examples 1-3.

[0127] Finally, it should be noted that the above content is only used to illustrate the technical solution of the present invention, rather than to limit the protection scope of the present invention. Any simple modification or equivalent replacement of the technical solution of the present invention by those of ordinary skill in the art shall not depart from the essence and scope of the technical solution of the present invention.

Claims

1. An adsorption material for air pollutant monitoring, characterized in that: The invention comprises modified polyurethane foam and filler; the modified polyurethane foam is: polyurethane foam is loaded with metal modification; the metal is Fe, Zn and Mn; the filler is XAD-4 and activated carbon.

2. The adsorption material for air pollutant monitoring according to claim 1, characterized in that: The mass ratio of the modified polyurethane foam to the filler is 1:(0.1-0.4); the density of the polyurethane foam is: 18-23kg / m 3 .

3. The adsorption material for air pollutant monitoring according to claim 1, characterized in that: The metals are Fe, Zn and Mn in a molar ratio of (1-3):(0.2-0.5):(0.1-0.2); the loading amount of the metal compound is 0.5-1.9% of the modified polyurethane foam.

4. The adsorption material for air pollutant monitoring according to claim 1, characterized in that: The mass ratio of XAD-4 to activated carbon is (1-2): (1-2); the specific surface area of ​​XAD-4 is 750-850m 2 / g.

5. The method for preparing the adsorption material for monitoring air pollutants according to any one of claims 1 to 4, characterized in that: The steps include: (1) immersing the polyurethane foam in an aqueous solution of a metal salt, adding alkali to adjust the pH to alkaline, heating for reaction, washing, and drying to obtain a modified polyurethane foam; (2) mixing XAD-4 and activated carbon in a solvent to obtain a suspension; (3) The modified polyurethane foam prepared in step (1) is immersed in the suspension obtained in step (2), and then dried.

6. The preparation method according to claim 5, characterized in that: The metal salt described in step (1) is at least one of the chloride, nitrate, sulfate and acetate of the metal; the molar concentration of the metal in the aqueous solution is 0.5-1.5 mol / L; the temperature of the heating reaction is 80-100° C. and the time is 5-10 h; the solvent described in step (2) is at least one of water or ethanol; the total mass concentration of XAD-4 and activated carbon in the suspension is 3-5 g / L; the immersion and drying operations in step (3) are repeated 2-3 times; and the immersion time is 40-60 s.

7. Use of the adsorbent material for monitoring air pollutants according to any one of claims 1 to 4 or the adsorbent material for monitoring air pollutants obtained by the preparation method according to any one of claims 5 to 6 in adsorbing air pollutants.

8. An application of a modified polyurethane and a filler in improving the adsorption efficiency of an adsorption material; the modified polyurethane is: polyurethane foam loaded with metal modification; the metal is at least one of Fe, Zn and Mn; the filler is XAD-4 and activated carbon.

9. An adsorbent, characterized in that It comprises the adsorption material for monitoring air pollutants as described in any one of claims 1 to 4 or the adsorption material for monitoring air pollutants obtained by the preparation method as described in any one of claims 5 to 6.

10. An air sampling device, comprising the adsorption material for monitoring air pollutants according to any one of claims 1 to 4 or the adsorption material for monitoring air pollutants obtained by the preparation method according to any one of claims 5 to 6.

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