Method for detecting harmful and toxic substance absorption performance of absorption material

Abstract

The invention belongs to the technical field of harmful and toxic substance absorption, and particularly relates to a method for detecting the harmful and toxic substance absorption performance of an absorption material. According to the detection method provided by the invention, the change relation of the absorption mass multiple of the absorption material along with time and the change relation of the absorption rate of the absorption material along with time are calculated; the performance of the absorbing material on the liquid harmful and toxic substances is comprehensively detected from four aspects of the absorption material, the displacement drainage rate of the absorbing material and the volatilization rate of the liquid harmful and toxic substances of the absorbing material, and the detection method provided by the invention can accurately and effectively evaluate the performance of the absorbing material for absorbing the harmful and toxic substances; therefore, the absorption material is guided to be applied to the absorption practice of harmful and toxic substances.

Description

Technical Field

[0001] The invention belongs to the technical field of harmful and toxic substance absorption, and in particular relates to a method for detecting the harmful and toxic substance absorption performance of an absorbing material. Background Art

[0002] Unlike most oils that float on the water and are insoluble in water, HNS exhibits a variety of behavior states (evaporation, floating, dissolution, and sedimentation). HNS may contaminate objects including: air, sea surface, water bodies, and seabeds, and indirectly affect organisms in all of the above spaces and the users of these spaces, posing a wider range of human health risks and aquatic toxicity. The hazards of HNS to humans and the aquatic environment can be divided into nine categories: respiratory toxicity, explosiveness, flammability, radioactivity, corrosiveness, carcinogenicity, aquatic toxicity, bioaccumulation, and persistence.

[0003] The adsorption method uses the surface of the adsorbent to absorb the leaked chemical. When the density of the chemical is less than that of water, the movement of the adsorbent and the leaked chemical can be controlled by nets and booms. If the density of the chemical is greater than that of water, the adsorbent also needs to sink to the water to absorb the chemical, and then there is the subsequent recovery work.

[0004] The adsorption process of existing adsorbent materials is a physical reaction. Therefore, during the adsorption process, HNS pollutants are desorbed at the same time, and the treatment effect of HNS pollution is not ideal. However, the absorption material reacts chemically with HNS pollutants, and the treatment effect of HNS pollution is more ideal. However, there is no good test method for the performance of existing absorption materials, and it is impossible to accurately guide the evaluation and use of the absorption material's performance in absorbing harmful and toxic substances. Summary of the invention

[0005] The purpose of the present invention is to provide a method for detecting the performance of an absorbent material in absorbing harmful and toxic substances. The detection method provided by the present invention can accurately and effectively evaluate the performance of an absorbent material in absorbing harmful and toxic substances, thereby guiding the application of the absorbent material in the practice of absorbing harmful and toxic substances.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] The present invention provides a method for detecting the performance of an absorbent material in absorbing harmful and toxic substances, comprising the following steps:

[0008] The absorbent material is immersed in liquid harmful and toxic substances for absorption, and the mass difference of the absorbent material before and after absorption is obtained at different absorption times;

[0009] The absorption mass multiple of the absorption material is obtained according to the mass difference before and after absorption and the mass of the absorption material before absorption, and the absorption time is taken as the independent variable and the absorption mass multiple of the absorption material is taken as the dependent variable to obtain the relationship between the absorption mass multiple of the absorption material and time;

[0010] The absorption rate of the absorbent material is obtained according to the mass difference before and after absorption and the absorption time, and the absorption time is taken as the independent variable and the absorption rate of the absorbent material is taken as the dependent variable to obtain the relationship between the absorption rate of the absorbent material and time;

[0011] The water-saturated absorbent material is immersed in a mixed solution containing liquid harmful and toxic substances for absorption; the mixed solution includes the liquid harmful and toxic substances and salt water; the absorption retention rate of the absorbent material is obtained according to the mass of the absorbent material before water absorption, the mass of the water-saturated absorbent material, the volume of salt water in the mixed solution before absorption, the volume of salt water in the mixed solution after absorption, and the density of the liquid harmful and toxic substances;

[0012] The absorption material is immersed in liquid harmful and toxic substances for absorption until saturation, so as to obtain an absorption saturated absorption material; the absorption saturated absorption material is placed for t time, and the mass of the absorption saturated absorption material at the initial moment is recorded as m1, and within the total time of t, the mass of the absorption saturated absorption material changing with time at equal time intervals is obtained, and the sum of the mass changes of the absorption material at equal time intervals within the total time of t is obtained, and the volatilization rate of the liquid harmful and toxic substance in the absorption material is obtained according to the sum of the time t and the mass change.

[0013] Preferably, the calculation formula for the absorption mass multiple of the absorption material is as shown in Formula 1:

[0014]

[0015] Preferably, the calculation formula of the absorption rate of the absorbent material is as shown in Formula 2:

[0016]

[0017] Preferably, the calculation formula of the absorption retention rate is shown in Formula 3:

[0018]

[0019] In formula 3: m1 is the mass of the absorbent material before absorbing water, m2 is the mass of the absorbent material saturated with water, V1 is the volume of the brine in the mixed solution containing liquid harmful and toxic substances before absorption, V2 is the volume of the brine in the mixed solution containing liquid harmful and toxic substances after absorption, and ρ is the density of the liquid harmful and toxic substances.

[0020] Preferably, the calculation formula of the volatilization rate of the liquid harmful and toxic substances in the absorbent material is as shown in Figure 4:

[0021]

[0022] In formula 4: i is a positive integer ≥ 3, t is the total time, m is n-1 is the mass of adsorbed material at the start of equal time intervals, m n is the mass of adsorbed material at the end point of equal time intervals.

[0023] Preferably, the liquid harmful and toxic substances include one or more of vegetable oil, benzene and styrene.

[0024] Preferably, the absorbent material is in the shape of a cuboid.

[0025] Preferably, the length×width×thickness of the absorbent material is 10cm×10cm×1cm.

[0026] Preferably, the mass percentage of sodium chloride in the brine is 3.5%.

[0027] Preferably, i is 7 and t is 60 min.

[0028] The present invention provides a method for detecting the performance of an absorbent material in absorbing harmful and toxic substances, comprising the following steps: immersing the absorbent material in liquid harmful and toxic substances for absorption, obtaining the mass difference of the absorbent material before and after absorption at different absorption times; obtaining the absorption mass multiple of the absorbent material according to the mass difference before and after absorption and the mass of the absorbent material before absorption, taking the absorption time as an independent variable and the absorption mass multiple of the absorbent material as a dependent variable, and obtaining the relationship between the absorption mass multiple of the absorbent material and time; obtaining the absorption rate of the absorbent material according to the mass difference before and after absorption and the absorption time, taking the absorption time as an independent variable and the absorption rate of the absorbent material as a dependent variable, and obtaining the relationship between the absorption rate of the absorbent material and time; immersing the water-saturated absorbent material in a mixed solution containing liquid harmful and toxic substances for absorption; the mixed solution comprises Liquid harmful and toxic substances and salt water; obtaining the absorption retention rate of the absorbent material according to the mass of the absorbent material before water absorption, the mass of the absorbent material saturated with water, the volume of the salt water in the mixed solution before absorption, the volume of the salt water in the mixed solution after absorption and the density of the liquid harmful and toxic substance; immersing the absorbent material in the liquid harmful and toxic substance for absorption until saturation, thereby obtaining the absorption saturated absorbent material; placing the absorption saturated absorbent material at rest for t time, the mass of the absorption saturated absorbent material at the initial moment is recorded as m1, obtaining the mass of the absorption saturated absorbent material changing with time at equal time intervals within the total time of t, obtaining the sum of the mass changes of the absorbent material at equal time intervals within the total time of t, and obtaining the volatilization rate of the liquid harmful and toxic substance of the absorbent material according to the sum of the time t and the mass changes. The detection method provided by the present invention comprehensively detects the performance of the absorbent material for liquid harmful and toxic substances from four aspects: the relationship between the change of the absorption mass multiple of the absorbent material with time, the relationship between the change of the absorption rate of the absorbent material with time, the absorption retention rate of the absorbent material, and the volatilization rate of the liquid harmful and toxic substances of the absorbent material. The detection method provided by the present invention can accurately and effectively evaluate the performance of the absorbent material in absorbing harmful and toxic substances, thereby guiding the application of the absorbent material in the practice of absorbing harmful and toxic substances. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a graph showing the relationship between the absorption mass multiples of soybean oil by Material A, Material B and Material C in Example 1 of the present invention and the absorption time;

[0030] Figure 2 The test results of the benzene absorption retention rate of material A, material B and material C in Example 1 of the present invention are as follows;

[0031] Figure 3 These are the test results of the styrene absorption retention rates of Material A, Material B and Material C in Example 1 of the present invention. DETAILED DESCRIPTION

[0032] The present invention provides a method for detecting the performance of an absorbent material in absorbing harmful and toxic substances, comprising the following steps:

[0033] The absorbent material is immersed in liquid harmful and toxic substances for absorption, and the mass difference of the absorbent material before and after absorption is obtained at different absorption times;

[0034] The absorption mass multiple of the absorption material is obtained according to the mass difference before and after absorption and the mass of the absorption material before absorption, and the absorption time is taken as the independent variable and the absorption mass multiple of the absorption material is taken as the dependent variable to obtain the relationship between the absorption mass multiple of the absorption material and time;

[0035] The absorption rate of the absorbent material is obtained according to the mass difference before and after absorption and the absorption time, and the absorption time is taken as the independent variable and the absorption rate of the absorbent material is taken as the dependent variable to obtain the relationship between the absorption rate of the absorbent material and time;

[0036] The water-saturated absorbent material is immersed in a mixed solution containing liquid harmful and toxic substances for absorption; the mixed solution includes the liquid harmful and toxic substances and salt water; the absorption retention rate of the absorbent material is obtained according to the mass of the absorbent material before water absorption, the mass of the water-saturated absorbent material, the volume of salt water in the mixed solution before absorption, the volume of salt water in the mixed solution after absorption, and the density of the liquid harmful and toxic substances;

[0037] The absorption material is immersed in liquid harmful and toxic substances for absorption until saturation, so as to obtain an absorption saturated absorption material; the absorption saturated absorption material is placed for t time, and the mass of the absorption saturated absorption material at the initial moment is recorded as m1, and within the total time of t, the mass of the absorption saturated absorption material changing with time at equal time intervals is obtained, and the sum of the mass changes of the absorption material at equal time intervals within the total time of t is obtained, and the volatilization rate of the liquid harmful and toxic substance in the absorption material is obtained according to the sum of the time t and the mass change.

[0038] The present invention immerses the absorbent material in liquid harmful and toxic substances for absorption, and obtains the mass difference of the absorbent material before and after absorption at different absorption times; the absorption mass multiple of the absorbent material is obtained according to the mass difference before and after absorption and the mass of the absorbent material before absorption, and the absorption time is used as the independent variable and the absorption mass multiple of the absorbent material is used as the dependent variable to obtain the relationship between the absorption mass multiple of the absorbent material and time.

[0039] In the present invention, the liquid harmful and toxic substances specifically include one or more of vegetable oil, benzene and styrene. The shape of the absorbent material sample is preferably a cuboid. The length×width×thickness of the absorbent material sample is preferably 10cm×10cm×1cm. In a specific embodiment of the present invention, the different absorption times are preferably intervals of 3min, 5min, 10min, 20min, 30min, 45min, and 60min.

[0040] In the present invention, the calculation formula for the absorption mass multiple of the absorption material is shown in Formula 1:

[0041]

[0042] The present invention immerses the absorbent material in liquid harmful and toxic substances for absorption, measures the mass difference of the absorbent material before and after absorption at different absorption times, obtains the absorption rate of the absorbent material according to the mass difference before and after absorption and the absorption time, takes the absorption time as the independent variable and the absorption rate of the absorbent material as the dependent variable, and obtains the relationship between the absorption rate of the absorbent material and time.

[0043] In the present invention, the liquid harmful and toxic substances specifically include one or more of vegetable oil, benzene and styrene. The shape of the absorbent material sample is preferably a cuboid. The length×width×thickness of the absorbent material sample is preferably 10cm×10cm×1cm. In a specific embodiment of the present invention, the different absorption times are preferably intervals of 3min, 5min, 10min, 20min, 30min, 45min, and 60min.

[0044] In the present invention, the calculation formula of the absorption rate of the absorbent material is shown in Formula 2:

[0045]

[0046] The present invention immerses a water-saturated absorbent material in a mixed solution containing liquid harmful and toxic substances for absorption; the mixed solution includes the liquid harmful and toxic substances and salt water; the absorption retention rate of the absorbent material is obtained according to the mass of the absorbent material before water absorption, the mass of the water-saturated absorbent material, the volume of salt water in the mixed solution before absorption, the volume of salt water in the mixed solution after absorption, and the density of the liquid harmful and toxic substances.

[0047] In the present invention, the liquid harmful and toxic substances specifically include one or more of vegetable oil, benzene and styrene. The shape of the absorbent material sample is preferably a cuboid. The length×width×thickness of the absorbent material sample is preferably 10cm×10cm×1cm. In a specific embodiment of the present invention, the mass percentage of sodium chloride in the brine is 3.5%. The method for preparing the saturated absorbent material preferably includes: immersing the absorbent material in water to obtain an initially saturated absorbent material; allowing the initially saturated absorbent material to stand until no water drips out of the absorbent material to obtain an saturated absorbent material. The time for immersing the absorbent material in water is preferably 2h, and the temperature is preferably room temperature. The standing is preferably standing on a metal mesh. The mass of the water-saturated absorbent material is the mass of the absorbent material after it is saturated and no water drips out when standing.

[0048] In the present invention, the water-saturated absorbent material is immersed in the mixed solution containing liquid harmful and toxic substances for absorption for a time preferably of 2 hours.

[0049] In the present invention, the calculation of the absorption retention rate is known as shown in Formula 3:

[0050]

[0051] In formula 3: m1 is the mass of the absorbent material before absorbing water, m2 is the mass of the absorbent material saturated with water, V1 is the volume of the brine in the mixed solution containing liquid harmful and toxic substances before absorption, V2 is the volume of the brine in the mixed solution containing liquid harmful and toxic substances after absorption, and ρ is the density of the liquid harmful and toxic substances.

[0052] In the present invention, the absorption retention rate of the absorbent material is also referred to as the displacement drainage rate of the absorbent material.

[0053] The present invention immerses an absorbent material in a liquid harmful or toxic substance for absorption until absorption is saturated, thereby obtaining an absorbent material saturated with absorption; the absorbent material saturated with absorption is placed for a time period of t, and the mass of the absorbent material saturated with absorption at the initial moment is recorded as m1; within a total time period of t, the mass of the absorbent material saturated with absorption that changes with time at equal time intervals is obtained; the sum of the mass changes of the absorbent material at equal time intervals within a total time period of t is calculated; and the volatilization rate of the liquid harmful or toxic substance of the absorbent material is obtained based on the sum of the time t and the mass change.

[0054] In the present invention, the liquid harmful and toxic substances specifically include one or more of vegetable oil, benzene and styrene. The shape of the absorbent material sample is preferably a cuboid. The length×width×thickness of the absorbent material sample is preferably 10cm×10cm×1cm. In a specific embodiment of the present invention, the mass m1 of the saturated absorbent material is the mass of the absorbent material after it is saturated and no liquid harmful and toxic substances drip out when it is left standing.

[0055] In the present invention, the absorption saturated absorbent material is preferably placed in a fume hood to carry out the above-mentioned operation of changing the absorption saturated absorbent material with time for a total time of t.

[0056] In the present invention, i is 7. In a specific embodiment of the present invention, after obtaining the absorption saturated absorption material, the present invention places the absorption saturated absorption material in a fume hood, and records the mass of the absorption saturated absorption material at each time interval T. The total number of time intervals T is preferably 6, and the total time length is t. Within the time t, the mass of the absorption saturated absorption material recorded by the present invention is m1 at t=0, m2 at the first time interval T, m3 at the second time interval T, m4 at the third time interval T, m5 at the fourth time interval T, m6 at the fifth time interval T, and m7 at the sixth time interval T. In a specific embodiment of the present invention, t=60min, T=10min.

[0057] In the present invention, the calculation formula of the volatilization rate of the liquid harmful and toxic substances in the absorbent material is as shown in Figure 4:

[0058]

[0059] In formula 4: i is a positive integer ≥ 3, t is the total time, m is n-1 is the mass of adsorbed material at the start of equal time intervals, m n is the mass of adsorbed material at the end point of equal time intervals.

[0060] In the present invention, the volatilization rate of the liquid harmful and toxic substances in the absorbent material is also referred to as the release rate of the liquid harmful and toxic substances in the absorbent material.

[0061] In order to further illustrate the present invention, the technical solutions provided by the present invention are described in detail below in conjunction with embodiments, but they should not be construed as limiting the protection scope of the present invention.

[0062] Example 1

[0063] This embodiment provides a method for detecting the performance of an absorbent material contaminated with HNS. The reagents and materials used in this embodiment specifically include: using benzene, styrene, and soybean oil as test solvents (simulating HNS), measuring the performance of the absorbent material in absorbing HNS, including a curve of the change of the absorption mass multiple over time, a curve of the change of the absorption rate over time, an absorption retention rate (i.e., a displacement drainage rate), and a release rate (i.e., a volatilization rate).

[0064] The absorbent material samples tested in this embodiment include: absorbent material purchased by Xuyi County Meida Purification Environmental Protection Material Co., Ltd. (Material A), Beijing Yuzhong Guangxin Environmental Protection Equipment Co., Ltd. (Material B), and Suzhou Beiduo Environmental Protection Equipment Co., Ltd. (Material C).

[0065] (I) Performance of absorbing HNS:

[0066] 1. Experimental instruments

[0067] Clock; electronic balance; metal mesh; glass container (8.6 cm in diameter, 1.7 cm in depth).

[0068] 2. Experimental Procedure

[0069] The entire experiment was carried out in a fume hood.

[0070] Prepare experimental materials

[0071] 1000 mL of liquid HNS (benzene, styrene, soybean oil) was placed in three experimental glass containers, numbered A1 (benzene), A2 (styrene), and A3 (soybean oil).

[0072] 3. Operation steps

[0073] Take a sample of the absorbent material, weigh it and make it into a square material sample of length × width × thickness = 10 cm × 10 cm × 1 cm, and place it flat in a glass container filled with liquid HNS, ensuring that the amount of liquid HNS is sufficient to saturate the absorbent material.

[0074] After intervals of 3min, 5min, 10min, 20min, 30min, 45min, 60min, 100min, 200min, 300min and 400min, take out the samples and place them flat on the metal mesh, and weigh them when there is no more liquid HNS dripping.

[0075] 4. Calculation formula

[0076] In this embodiment, the application performance of the absorbent material is determined by the absorption mass multiple and absorption rate of the absorbent material. The absorption mass multiple refers to the mass of HNS absorbed by the absorbent material sample per unit mass; the absorption rate refers to the mass of HNS absorbed by the absorbent material sample per unit time. The calculation formula of the absorption mass multiple is as follows:

[0077]

[0078] The calculation formula of absorption rate is as follows;

[0079]

[0080] Draw the graphs of absorption time and absorption mass multiple of the absorbent material and the graphs of absorption time and absorption rate of the absorbent material respectively, observe the graphs, and remove the wrong experiments. Carry out three sets of comparative parallel experiments to determine the absorption performance of each material.

[0081] (II) Absorbent material displacement drainage rate test

[0082] 1. Purpose of the experiment

[0083] The purpose of this embodiment is to detect the absorption effect of the absorbent material after saturation with water on insoluble HNS, and to detect the priority order of the absorbent material for water and insoluble HNS.

[0084] 2. Reagents and Materials

[0085] Benzene (C6H6): ρ = 876.5 mg / cm 3 .

[0086] Styrene (C8H8): ρ = 960.0 mg / cm 3 .

[0087] Soybean oil: 915.0~937.5mg / cm 3 .

[0088] Saline solution: 3.5% sodium chloride aqueous solution by mass.

[0089] Dye: Insoluble in water, it is recommended to use ink pad ink.

[0090] 3. Experimental instruments

[0091] Clock; electronic balance; metal mesh; glass container (8.6cm in diameter, 1.7cm in depth); separating funnel; rubber-tipped dropper.

[0092] 4. Experimental Procedure

[0093] Prepare experimental materials

[0094] After weighing the absorbent material, a square material sample with a size of length × width × thickness = 10 cm × 10 cm × 1 cm is prepared and weighed m1.

[0095] 100 mL of HNS and a volume of V1 of saline solution were placed in the experimental glass container A2. When the dye was dropped into the HNS, the dye was dissolved immediately, and the upper layer of the solution in the glass container A2 appeared red.

[0096] 5. Operation steps

[0097] Immerse the material sample in a glass container A1 filled with sufficient water. After immersion for 2 hours, when the absorption material is completely saturated, take it out and place it on a metal mesh.

[0098] When no more water drips out of the material sample, weigh it and record the mass m2 after water absorption and saturation.

[0099] Place the water-saturated material sample flat in glass container A2 and let it stand for 20 min, 40 min, 60 min, 80 min, 100 min and 2 h, then take it out and weigh it.

[0100] According to the stratification phenomenon indicated by the dye, pour the liquid in the glass container A2 into the separatory funnel for separation. After the separation is completed, record the volume V2 of the existing saline solution. The calculation formula for the displacement drainage rate is shown in Formula 3: Where ρ in Formula 3 is the density of HNS;

[0101]

[0102] A graph is made of the replacement time of the absorbent material versus the absorbency retention.

[0103] (III) Absorbent material release rate test

[0104] 1. Reagents

[0105] Benzene (C6H6): ρ = 876.5 mg / cm 3 .

[0106] Styrene (C8H8): ρ = 960.0 mg / cm 3 .

[0107] Soybean oil: 915.0~937.5mg / cm 3 .

[0108] 2. Experimental Instruments

[0109] Clock; electronic balance; metal mesh; tweezers; glass container (8.6 cm in diameter, 1.7 cm in depth).

[0110] 3. Experimental Procedure

[0111] Prepare experimental materials

[0112] After weighing the absorbent material, make it into a square material sample with a size of length × width × thickness = 10 cm × 10 cm × 1 cm, weigh it, and record the mass m1.

[0113] 1000 ml of pure liquid HNS was placed in a test glass container A1.

[0114] 4. Operation steps

[0115] Immerse the material sample in glass container A1. After immersion for 2 hours, when the absorption material is completely saturated, hang up the sample with tweezers, weigh it immediately, and record the mass m2.

[0116] When the material sample stops dripping, record the time when dripping stops, and weigh it immediately, and record the mass m3.

[0117] Hang the absorbent material with a mass of m3 in a fume hood and record the mass of the absorbent material every 10 minutes. Record 6 sets of data, namely, mass m4 at 10 minutes, mass m5 at 20 minutes, mass m6 at 30 minutes, mass m7 at 40 minutes, mass m8 at 50 minutes and mass m9 at 60 minutes. The time is 1 hour.

[0118] Based on the above 6 sets of data, a linear relationship diagram between the experimental time and the material weight is drawn to calculate the average volatilization rate within 1 hour. The calculation formula for the volatilization rate is as follows;

[0119]

[0120] Test results:

[0121] 1. Soybean oil absorption mass ratio (soybean oil density: 921mg / cm 3 )

[0122] The relationship between the absorption mass multiple of soybean oil by Material A (the absorbent material purchased by Xuyi Meida Purification Environmental Protection Material Co., Ltd.) and the absorption time (seconds) is as follows: Figure 1 As shown in the upper left corner of the figure, the maximum absorption mass multiple is 7.98.

[0123] The relationship between the absorption mass multiple of soybean oil by Material B (Beijing Yuzhong Guangxin Environmental Protection Equipment Co., Ltd.) and the absorption time (seconds) is as follows: Figure 1 As shown in the upper right corner of the figure, the maximum absorption mass multiple is 8.80.

[0124] The relationship between the absorption mass multiple of soybean oil by Material C (Suzhou Beiduo Environmental Protection Equipment Co., Ltd.) and the absorption time (seconds) is as follows: Figure 1 As shown in the lower left corner of the figure, the maximum absorption mass multiple is 7.68.

[0125] Depend on Figure 1The results show that material A is thick and heavy, and absorbs soybean oil at a slightly slower rate; materials B and C can absorb saturated oil in 20 seconds. For soybean oil, the absorption mass multiples of materials A, B and C are all ≥7.0.

[0126] 2. Benzene absorption retention rate (obtained from the displacement drainage rate formula 3 of the absorption material displacement drainage rate experiment in Example 1 (II)),

[0127] The test results of material A (absorbent material purchased from Xuyi Meida Purification Environmental Protection Material Co., Ltd.) on benzene absorption retention rate are as follows: Figure 2 As shown in the upper left corner of the figure.

[0128] The test results of material B (Beijing Yuzhong Guangxin Environmental Protection Equipment Co., Ltd.) on benzene absorption retention are as follows: Figure 2 As shown in the upper right corner of the figure.

[0129] The test results of material C (Suzhou Beiduo Environmental Protection Equipment Co., Ltd.) on benzene absorption retention are as follows Figure 2 As shown in the lower left corner of the figure.

[0130] Depend on Figure 2 The results show that the absorption retention rate of material A to benzene is ≥80.0% within 90 minutes. The absorption retention rates of materials B and C to benzene cannot be fitted.

[0131] 3. Styrene absorption retention rate (obtained from the displacement drainage rate formula 3 of the absorption material displacement drainage rate experiment in Example 1 (II)),

[0132] The test results of material A (absorbent material purchased from Xuyi Meida Purification Environmental Protection Material Co., Ltd.) on styrene absorption retention rate are as follows: Figure 3 As shown in the upper left corner of the figure.

[0133] The test results of material B (Beijing Yuzhong Guangxin Environmental Protection Equipment Co., Ltd.) on styrene absorption retention are as follows: Figure 3 As shown in the upper right corner of the figure.

[0134] The test results of material C (Suzhou Beiduo Environmental Protection Equipment Co., Ltd.) on styrene absorption retention are as follows Figure 3 As shown in the lower left corner of the figure.

[0135] Depend on Figure 3 The results show that for styrene, the absorption retention rates of absorbent materials A, B and C are all ≥80.0% within 60 minutes and ≥75.0% within 90 minutes.

[0136] Although the above embodiment describes the present invention in detail, it is only a part of the embodiments of the present invention, not all of the embodiments. Other embodiments can be obtained based on this embodiment without creativity, and these embodiments all fall within the protection scope of the present invention.

Claims

1. A method for detecting the performance of an absorbent material in absorbing harmful and toxic substances, characterized in that: The following steps are involved: The absorbent material is immersed in liquid harmful and toxic substances for absorption, and the mass difference of the absorbent material before and after absorption is obtained at different absorption times; The absorption mass multiple of the absorption material is obtained according to the mass difference before and after absorption and the mass of the absorption material before absorption, and the absorption time is taken as the independent variable and the absorption mass multiple of the absorption material is taken as the dependent variable to obtain the relationship between the absorption mass multiple of the absorption material and time; The absorption rate of the absorbent material is obtained according to the mass difference before and after absorption and the absorption time, and the absorption time is taken as the independent variable and the absorption rate of the absorbent material is taken as the dependent variable to obtain the relationship between the absorption rate of the absorbent material and time; The water-saturated absorbent material is immersed in a mixed solution containing liquid harmful and toxic substances for absorption; the mixed solution includes the liquid harmful and toxic substances and salt water; the absorption retention rate of the absorbent material is obtained according to the mass of the absorbent material before water absorption, the mass of the water-saturated absorbent material, the volume of salt water in the mixed solution before absorption, the volume of salt water in the mixed solution after absorption, and the density of the liquid harmful and toxic substances; The absorption material is immersed in liquid harmful and toxic substances for absorption until saturation, so as to obtain an absorption saturated absorption material; the absorption saturated absorption material is placed for t time, and the mass of the absorption saturated absorption material at the initial moment is recorded as m1, and within the total time of t, the mass of the absorption saturated absorption material changing with time at equal time intervals is obtained, and the sum of the mass changes of the absorption material at equal time intervals within the total time of t is obtained, and the volatilization rate of the liquid harmful and toxic substance in the absorption material is obtained according to the sum of the time t and the mass change.

2. The detection method according to claim 1, characterized in that: The calculation formula of the absorption mass multiple of the absorption material is shown in Formula 1:

3. The detection method according to claim 1, characterized in that: The calculation formula of the absorption rate of the absorbent material is shown in Formula 2:

4. The detection method according to claim 1, characterized in that: The calculation formula of the absorption retention rate is shown in Formula 3: In formula 3: m1 is the mass of the absorbent material before absorbing water, m2 is the mass of the absorbent material saturated with water, V1 is the volume of the brine in the mixed solution containing liquid harmful and toxic substances before absorption, V2 is the volume of the brine in the mixed solution containing liquid harmful and toxic substances after absorption, and ρ is the density of the liquid harmful and toxic substances.

5. The detection method according to claim 1, characterized in that: The calculation formula of the volatilization rate of the liquid harmful and toxic substances in the absorbent material is shown in Figure 4: In formula 4: i is a positive integer ≥ 3, t is the total time, m is n-1 is the mass of adsorbed material at the start of equal time intervals, m n is the mass of adsorbed material at the end point of equal time intervals.

6. The detection method according to claim 1, characterized in that: The liquid harmful and toxic substances include one or more of vegetable oil, benzene and styrene.

7. The detection method according to claim 1, characterized in that: The absorbent material is in the shape of a cuboid.

8. The detection method according to claim 1 or 7, characterized in that: The length×width×thickness of the absorbent material is 10 cm×10 cm×1 cm.

9. The detection method according to claim 1, characterized in that: The mass percentage of sodium chloride in the brine is 3.5%.

10. The detection method according to claim 5, characterized in that: The i is 7, and t is 60 min.

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