A method for detecting the absorption performance of absorbent materials in absorbing harmful and toxic substances.

Abstract

This invention belongs to the field of hazardous and toxic substance absorption technology, specifically relating to a method for testing the absorption performance of absorbent materials for hazardous and toxic substances. The testing method provided by this invention comprehensively tests the performance of absorbent materials for liquid hazardous and toxic substances from four aspects: the relationship between the absorption mass ratio of the absorbent material and time, the relationship between the absorption rate of the absorbent material and time, the displacement drainage rate of the absorbent material, and the volatilization rate of the liquid hazardous and toxic substances in the absorbent material. The testing method provided by this invention can accurately and effectively evaluate the performance of absorbent materials in absorbing hazardous and toxic substances, thereby guiding the application of absorbent materials in the practice of absorbing hazardous and toxic substances.

Description

Technical Field

[0001] This invention belongs to the field of harmful and toxic substance absorption technology, specifically relating to a method for detecting the absorption performance of absorbent materials in absorbing harmful and toxic substances. Background Technology

[0002] Unlike most oils that float on the water surface and are insoluble in water, hazardous and toxic substances (HNS) exhibit multiple behavioral states (evaporation, floating, dissolving, and settling). HNS can pollute the air, sea surface, water bodies, and seabed, indirectly affecting organisms and users in all these spaces, posing broader risks to human health and aquatic life. The hazards of HNS to humans and the aquatic environment can be categorized into nine types: respiratory toxicity, explosiveness, flammability, radioactivity, corrosiveness, carcinogenicity, aquatic life toxicity, bioaccumulation, and persistence.

[0003] Adsorption methods utilize the surface of an adsorbent to absorb leaked chemicals. When the density of the chemical is less than that of water, the movement of the adsorbent material and the leaked chemicals can be controlled using nets and oil booms. If the density of the chemical is greater than that of water, then the adsorbent material also needs to sink underwater to adsorb the chemicals, followed by subsequent recovery efforts.

[0004] The adsorption process of existing adsorbent materials involves a physical reaction. Therefore, during adsorption, desorption of HNS pollutants also occurs, resulting in unsatisfactory HNS pollution control. In contrast, absorbent materials react chemically with HNS pollutants, leading to more ideal HNS pollution control. However, there are no effective testing methods for the performance of existing absorbent materials, making it difficult to accurately guide the evaluation and application of their ability to absorb harmful and toxic substances. Summary of the Invention

[0005] The purpose of this invention is to provide a method for testing the absorption performance of absorbent materials in absorbing harmful and toxic substances. The testing method provided by this invention can accurately and effectively evaluate the absorption performance of absorbent materials in absorbing harmful and toxic substances, thereby guiding the application of absorbent materials in the practice of absorbing harmful and toxic substances.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] This invention provides a method for detecting the absorption performance of absorbent materials in absorbing harmful and toxic substances, comprising the following steps:

[0008] The absorbent material was immersed in a liquid harmful and toxic substance for absorption, and the mass difference of the absorbent material before and after absorption was obtained at different absorption times.

[0009] The absorption mass ratio of the absorbent material is obtained by considering the mass difference before and after absorption and the mass of the absorbent material before absorption. The relationship between the absorption mass ratio of the absorbent material and time is obtained by taking absorption time as the independent variable and the absorption mass ratio of the absorbent material as the dependent variable.

[0010] The absorption rate of the absorbent material is obtained by taking the mass difference before and after absorption and the absorption time. The relationship between the absorption rate of the absorbent material and time is obtained by taking the absorption time as the independent variable and the absorption rate of the absorbent material as the dependent variable.

[0011] The absorbent material saturated with water is immersed in a mixed solution containing liquid harmful and toxic substances for absorption; the mixed solution includes liquid harmful and toxic substances and salt water; the absorption retention rate of the absorbent material is obtained based on the mass of the absorbent material before water absorption, the mass of the absorbent material saturated with water, 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 absorbent material is immersed in a liquid harmful and toxic substance for absorption until it becomes saturated, resulting in a saturated absorbent material. The saturated absorbent material is then left to stand for a time t. The initial mass of the saturated absorbent material is denoted as m1. Over a total time period t, the mass change of the saturated absorbent material over time is obtained at equal time intervals. The sum of the mass changes of the absorbent material at equal time intervals over a total time period t is obtained. Based on the sum of the time t and the mass changes, the volatilization rate of the liquid harmful and toxic substance in the absorbent material is obtained.

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

[0014]

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

[0016]

[0017] Preferably, the formula for calculating the absorption retention rate is as shown in Formula 3:

[0018]

[0019] In Formula 3: m1 is the mass of the absorbent material before water absorption, m2 is the mass of the absorbent material saturated with water, V1 is the volume of salt water in the mixed solution containing liquid harmful and toxic substances before absorption, V2 is the volume of salt water 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 formula for calculating the volatilization rate of the liquid harmful and toxic substances in the absorbent material is shown in Figure 4:

[0021]

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

[0023] Preferably, the liquid hazardous and toxic substance includes 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 sodium chloride content in the brine is 3.5% by mass.

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

[0028] This invention provides a method for detecting the absorption performance of absorbent materials in absorbing harmful and toxic substances, comprising the following steps: immersing the absorbent material in a liquid harmful and toxic substance 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 based on the mass difference before and after absorption and the mass of the absorbent material before absorption, and obtaining the relationship between the absorption mass multiple of the absorbent material and time, with absorption time as the independent variable and the absorption mass multiple of the absorbent material as the dependent variable; obtaining the absorption rate of the absorbent material based on the mass difference before and after absorption and the absorption time, and obtaining the relationship between the absorption rate of the absorbent material and time, with absorption time as the independent variable and the absorption rate of the absorbent material as the dependent variable; immersing the water-saturated absorbent material in a mixed solution containing liquid harmful and toxic substances for absorption; the mixed solution includes… Liquid harmful and toxic substances and salt water; the absorption retention rate of the absorbent material is obtained based on 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 substances; the absorbent material is immersed in the liquid harmful and toxic substances for absorption until absorption saturation is obtained, resulting in saturated absorbent material; the saturated absorbent material is left to stand for time t, the initial mass of the saturated absorbent material is recorded as m1, and the mass change of the saturated absorbent material over time is obtained at equal time intervals over a total time period t. The sum of the mass changes of the absorbent material at equal time intervals over a total time period t is obtained, and the volatilization rate of the liquid harmful and toxic substances in the absorbent material is obtained based on the sum of the time and mass changes over time t. The detection method provided by this invention comprehensively tests the performance of absorbent materials in absorbing liquid harmful and toxic substances from four aspects: the relationship between the absorption mass ratio of the absorbent material and time, the relationship between the absorption rate of the absorbent material and time, the absorption retention rate of the absorbent material, and the volatilization rate of the liquid harmful and toxic substances in the absorbent material. The detection method provided by this invention can accurately and effectively evaluate the performance of absorbent materials in absorbing harmful and toxic substances, thereby guiding the application of absorbent materials in the practice of absorbing harmful and toxic substances. Attached Figure Description

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

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

[0031] Figure 3 The results show the test results of the styrene absorption retention rate of materials A, B, and C in Example 1 of this invention. Detailed Implementation

[0032] This invention provides a method for detecting the absorption performance of absorbent materials in absorbing harmful and toxic substances, comprising the following steps:

[0033] The absorbent material was immersed in a liquid harmful and toxic substance for absorption, and the mass difference of the absorbent material before and after absorption was obtained at different absorption times.

[0034] The absorption mass ratio of the absorbent material is obtained by considering the mass difference before and after absorption and the mass of the absorbent material before absorption. The relationship between the absorption mass ratio of the absorbent material and time is obtained by taking absorption time as the independent variable and the absorption mass ratio of the absorbent material as the dependent variable.

[0035] The absorption rate of the absorbent material is obtained by taking the mass difference before and after absorption and the absorption time. The relationship between the absorption rate of the absorbent material and time is obtained by taking the absorption time as the independent variable and the absorption rate of the absorbent material as the dependent variable.

[0036] The absorbent material saturated with water is immersed in a mixed solution containing liquid harmful and toxic substances for absorption; the mixed solution includes liquid harmful and toxic substances and salt water; the absorption retention rate of the absorbent material is obtained based on the mass of the absorbent material before water absorption, the mass of the absorbent material saturated with water, 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 absorbent material is immersed in a liquid harmful and toxic substance for absorption until it becomes saturated, resulting in a saturated absorbent material. The saturated absorbent material is then left to stand for a time t. The initial mass of the saturated absorbent material is denoted as m1. Over a total time period t, the mass change of the saturated absorbent material over time is obtained at equal time intervals. The sum of the mass changes of the absorbent material at equal time intervals over a total time period t is obtained. Based on the sum of the time t and the mass changes, the volatilization rate of the liquid harmful and toxic substance in the absorbent material is obtained.

[0038] This invention involves immersing an absorbent material in a liquid harmful or toxic substance for absorption, obtaining the mass difference of the absorbent material before and after absorption at different absorption times; based on the mass difference before and after absorption and the mass of the absorbent material before absorption, the absorption mass multiple of the absorbent material is obtained; with absorption time as the independent variable and the absorption mass multiple of the absorbent material as the dependent variable, the relationship between the absorption mass multiple of the absorbent material and time is obtained.

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

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

[0041]

[0042] This invention involves immersing an absorbent material in a liquid harmful or toxic substance for absorption. The mass difference of the absorbent material before and after absorption is measured at different absorption times. The absorption rate of the absorbent material is obtained based on the mass difference before and after absorption and the absorption time. The relationship between the absorption rate of the absorbent material and time is obtained by using the absorption time as the independent variable and the absorption rate of the absorbent material as the dependent variable.

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

[0044] In this invention, the formula for calculating the absorption rate of the absorbent material is shown in Formula 2:

[0045]

[0046] This invention involves immersing a water-saturated absorbent material in a mixed solution containing liquid harmful and toxic substances for absorption; the mixed solution includes liquid harmful and toxic substances and salt water; the absorption retention rate of the absorbent material is obtained based on the mass of the absorbent material before water absorption, the mass of the water-saturated absorbent material, 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 substances.

[0047] In this invention, the liquid harmful and toxic substance specifically includes one or more of vegetable oil, benzene, and styrene. The shape of the absorbent material sample is preferably cuboid. The length × width × thickness of the absorbent material sample is preferably 10cm × 10cm × 1cm. In a specific embodiment of this invention, the sodium chloride content in the saline solution is 3.5% by mass. The method for preparing the saturated absorbent material preferably includes: immersing the absorbent material in water to obtain an initially saturated absorbent material; and allowing the initially saturated absorbent material to stand until no more water drips out, obtaining a fully saturated absorbent material. The immersion time of the absorbent material in water is preferably 2 hours, and the temperature is preferably room temperature. The standing time is preferably on a metal mesh. The mass of the water-saturated absorbent material is the mass of the absorbent material after absorption saturation and when no more water drips out.

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

[0049] In this 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 water absorption, m2 is the mass of the absorbent material saturated with water, V1 is the volume of salt water in the mixed solution containing liquid harmful and toxic substances before absorption, V2 is the volume of salt water 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 this invention, the absorption retention rate of the absorbent material is also referred to as the displacement drainage rate of the absorbent material.

[0053] This invention involves immersing an absorbent material in a liquid harmful or toxic substance until it becomes saturated, resulting in a saturated absorbent material. The saturated absorbent material is then left to stand for a time t. The initial mass of the saturated absorbent material is denoted as m1. Over a total time period t, the mass change of the saturated absorbent material over equal time intervals is calculated. The sum of these mass changes over the total time period t is then used to determine the evaporation rate of the liquid harmful or toxic substance from the absorbent material.

[0054] In this invention, the liquid harmful and toxic substance specifically includes one or more of vegetable oil, benzene, and styrene. The shape of the absorbent material sample is preferably cuboid. The length × width × thickness of the absorbent material sample is preferably 10cm × 10cm × 1cm. In a specific embodiment of this invention, the mass m1 of the saturated absorbent material is the mass of the absorbent material after absorption saturation and when it has been left to stand without any further dripping of liquid harmful and toxic substances.

[0055] The present invention preferably places the saturated absorbent material in a fume hood and performs the above-mentioned operation of the saturated absorbent material changing over time for a total duration of t.

[0056] In this invention, i is 7. In a specific embodiment of this invention, after obtaining the saturated absorbent material, the saturated absorbent material is placed in a fume hood, and the mass of the saturated absorbent material is recorded at intervals T. The total number of intervals T is preferably 6, and the total duration is t. Within time t, the mass of the saturated absorbent material recorded by this 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 this invention, t=60min and T=10min.

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

[0058]

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

[0060] In this 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] To further illustrate the present invention, the technical solutions provided by the present invention will be described in detail below with reference to the embodiments, but they should not be construed as limiting the scope of protection of the present invention.

[0062] Example 1

[0063] This embodiment provides a method for testing the performance of absorbent materials contaminated with HNS. The reagents and materials used in this embodiment specifically include: using benzene, styrene, and soybean oil as test solvents (simulating HNS), determining the absorbent material's performance in absorbing HNS, including the absorption mass factor versus time curve, the absorption rate versus time curve, absorption retention rate (i.e., displacement drainage rate), and release rate (i.e., evaporation rate).

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

[0065] (a) The ability to absorb HNS:

[0066] 1. Experimental apparatus

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

[0068] 2. Experimental Procedure

[0069] The entire experiment was conducted inside a fume hood.

[0070] Prepare experimental materials

[0071] Take 1000 mL of liquid HNS (benzene, styrene, soybean oil) and place it into three experimental glass containers, which are numbered A1 (benzene), A2 (styrene), and A3 (soybean oil) respectively.

[0072] 3. Operating Procedures

[0073] Take a sample of absorbent material, weigh it, and then make it into a square sample with a length × width × thickness of 10cm × 10cm × 1cm. 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 3 min, 5 min, 10 min, 20 min, 30 min, 45 min, 60 min, 100 min, 200 min, 300 min, and 400 min, the samples were removed and laid flat on a metal mesh. They were weighed when no more liquid HNS dripped down.

[0075] 4. Calculation formula

[0076] This embodiment determines the application performance of the absorbent material by measuring its absorption mass ratio and absorption rate. The absorption mass ratio refers to the mass of HNS absorbed by a unit mass of absorbent material sample; the absorption rate refers to the mass of HNS absorbed by the absorbent material sample per unit time. The formula for calculating the absorption mass ratio is as follows:

[0077]

[0078] The formula for calculating the absorption rate is as follows;

[0079]

[0080] Plot the absorption time versus absorption mass ratio and the absorption time versus absorption rate of the absorbent material, respectively. Observe the plots and eliminate erroneous experiments. Conduct three sets of parallel comparative experiments to determine the absorption performance of each material.

[0081] (II) Experiment on the displacement drainage rate of absorbent material

[0082] 1. Experimental Objective

[0083] The purpose of this embodiment is to test the absorption effect of an absorbent material after it has become saturated with water on insoluble HNS. The experiment aims to determine the order of preference of the absorbent material for water and insoluble HNS.

[0084] 2. Reagents and Materials

[0085] Benzene (C6H6): ρ = 876.5 mg / cm³ 3 .

[0086] Styrene (C8H8): ρ = 960.0 mg / cm³ 3 .

[0087] Soybean oil: 915.0~937.5mg / cm³ 3 .

[0088] Salt solution: A sodium chloride aqueous solution with a mass percentage of 3.5%.

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

[0090] 3. Experimental Apparatus

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

[0092] 4. Experimental Procedure

[0093] Prepare experimental materials

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

[0095] Place 100 mL of HNS and a V1 volume of saline solution into glass container A2. Add the staining agent; layering is observed. The staining agent dissolves immediately upon addition to the HNS, and the upper layer of the solution in glass container A2 turns red.

[0096] 5. Operating Procedures

[0097] Immerse the material sample in a glass container A1 containing a sufficient amount of water. After immersion for 2 hours until the absorbent material is completely saturated, remove the sample and place it on a metal mesh.

[0098] Weigh the material sample when no more water droplets appear. Record the mass m2 after it becomes saturated with water.

[0099] After the material sample is saturated with water, place it 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] Based on the stratification phenomenon indicated by the dye, the liquid in glass container A2 was poured into a separatory funnel for separation. After separation, the volume V2 of the existing brine solution was recorded. The displacement displacement rate was calculated using Formula 3, where ρ in Formula 3 is the density of HNS.

[0101]

[0102] Plot a curve showing the replacement time of the absorbent material versus the absorption retention rate.

[0103] (III) Experiment on the release rate of the absorbent material

[0104] 1. Reagents

[0105] Benzene (C6H6): ρ = 876.5 mg / cm³ 3 .

[0106] Styrene (C8H8): ρ = 960.0 mg / cm³ 3 .

[0107] Soybean oil: 915.0~937.5mg / cm³ 3 .

[0108] 2. Experimental apparatus

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

[0110] 3. Experimental Procedure

[0111] Prepare experimental materials

[0112] After weighing the absorbent material, a square material sample with a length × width × thickness of 10cm × 10cm × 1cm was prepared, weighed, and the mass m1 was recorded.

[0113] Place 1000 ml of pure liquid HNS into the experimental glass container A1.

[0114] 4. Operating Procedures

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

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

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

[0118] Based on the above 6 sets of data, plot the linear relationship between experimental time and material weight, and calculate the average evaporation rate within 1 hour. The formula for calculating the evaporation rate is shown below;

[0119]

[0120] Test results:

[0121] 1. Soybean oil absorption mass ratio (soybean oil density: 921 mg / cm³) 3 )

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

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

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

[0125] Depend on Figure 1The results show that material A, being thicker and heavier, absorbs soybean oil at a slightly slower rate; materials B and C can be saturated with soybean oil within 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 formula 3 of the displacement drainage rate experiment of the absorbent material in Example 1 (II)).

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

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

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

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

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

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

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

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

[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 embodiments have provided a detailed description of the present invention, they are only some embodiments of the present invention, and not all embodiments. Other embodiments can be obtained based on these embodiments without creative effort, and these embodiments all fall within the protection scope of the present invention.

Claims

1. A method for detecting the absorption performance of an absorbent material in absorbing harmful and toxic substances, characterized in that, Includes the following steps: The absorbent material was immersed in a liquid harmful and toxic substance for absorption, and the mass difference of the absorbent material before and after absorption was obtained at different absorption times. The absorption mass ratio of the absorbent material is obtained by considering the mass difference before and after absorption and the mass of the absorbent material before absorption. The relationship between the absorption mass ratio of the absorbent material and time is obtained by taking absorption time as the independent variable and the absorption mass ratio of the absorbent material as the dependent variable. The absorption rate of the absorbent material is obtained by taking the mass difference before and after absorption and the absorption time. The relationship between the absorption rate of the absorbent material and time is obtained by taking the absorption time as the independent variable and the absorption rate of the absorbent material as the dependent variable. The absorbent material saturated with water is immersed in a mixed solution containing liquid harmful and toxic substances for absorption; the mixed solution includes liquid harmful and toxic substances and salt water; the absorption retention rate of the absorbent material is obtained based on the mass of the absorbent material before water absorption, the mass of the absorbent material saturated with water, 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 absorbent material is immersed in a liquid harmful and toxic substance for absorption until it becomes saturated, resulting in a saturated absorbent material. The saturated absorbent material is then left to stand for a time t. The initial mass of the saturated absorbent material is denoted as m1. Over a total time period t, the mass change of the saturated absorbent material over time is obtained at equal time intervals. The sum of the mass changes of the absorbent material at equal time intervals over a total time period t is obtained. Based on the sum of the time t and the mass changes, the volatilization rate of the liquid harmful and toxic substance in the absorbent material is obtained.

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

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

4. The detection method according to claim 1, characterized in that, The formula for calculating the absorption retention rate is shown in Formula 3: In Formula 3: m1 is the mass of the absorbent material before water absorption, m2 is the mass of the absorbent material saturated with water, V1 is the volume of salt water in the mixed solution containing liquid harmful and toxic substances before absorption, V2 is the volume of salt water 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 formula for calculating the volatilization rate of the liquid harmful and toxic substances in the absorbent material is shown in Formula 4: In Formula 4: i is a positive integer ≥ 3, t is the total time, and m n-1 m represents the mass of the adsorbed material at the start of equal time intervals. n The mass of the adsorbed material is the mass at the end of each equal time interval.

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

7. The detection method according to claim 1, characterized in that, The absorbent material is rectangular in shape.

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

9. The detection method according to claim 1, characterized in that, The brine contains 3.5% sodium chloride by mass.

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

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