A method for comprehensively evaluating the adsorption performance of an adsorbent material

Abstract

The present invention belongs to the technical field of evaluation of the adsorption performance of adsorbents, and particularly relates to a method for comprehensively evaluating the adsorption performance of adsorption materials, comprising the following steps: Step 1, determining the number of adsorbents to be involved in the evaluation; Step 2, respectively calculating the maximum adsorption capacity and adsorption rate of n adsorbents at different initial concentrations of the same adsorbate; Step 3, establishing a fitting model; Step 4, calculating the maximum adsorption rate of the fitting model and the initial concentration corresponding to half of the maximum adsorption rate; Step 5, calculating the semi-maximum adsorption rate of the fitting model; Step 6, calculating the corresponding affinity of the adsorbent; Step 7, plotting an affinity-adsorption capacity quadrant diagram; Step 8, dividing several adsorbents into three parts; Step 9, selecting the required adsorbent according to the current working conditions. The present invention constructs an affinity-adsorption capacity quadrant diagram, comprehensively evaluates and classifies the adsorption materials, which is beneficial to assisting the ecological restoration of natural water bodies and the phosphorus recovery and utilization of industrial wastewater.

Description

Technical Field

[0001] The present invention belongs to the technical field of evaluating the adsorption performance of adsorbents, and particularly relates to a method for comprehensively evaluating the adsorption performance of adsorption materials. Background Art

[0002] In recent years, with the further improvement of China's economic development level, a large amount of industrial wastewater, agricultural surface runoff, and urban domestic wastewater have entered natural water bodies, leading to an increasing number of water environment problems. Heavy metals dissolved in water are transferred and enriched step by step, threatening human life safety through the biological chain. The continuous input of nutrients such as nitrogen and phosphorus exceeds the self-purification capacity of natural water bodies such as lakes, resulting in water eutrophication, creating conditions for the proliferation and dominance of cyanobacteria, and promoting the outbreak of cyanobacterial blooms.

[0003] The adsorption method has the characteristics of low operating cost, simple operation, and high treatment efficiency, and is widely used in pollutant removal and the recycling of non-renewable resources such as phosphorus. At present, a series of adsorbents such as metal oxides, natural minerals, carbonyl materials, synthetic or natural polymers have been developed. These adsorbents usually have diverse adsorption capabilities, including adsorption capacity, affinity for target adsorbates, etc. These indicators jointly determine the adsorption efficiency and applicable range of the adsorbent for target pollutants, and are important bases for evaluating the comprehensive performance and application scenarios of the adsorbent. However, at present, a single indicator is widely used to evaluate the adsorption performance, that is, the increase in adsorption capacity is emphasized. The lack of qualitative and quantitative techniques for the affinity relationship between the adsorbent and the target pollutant is not conducive to the development of adsorbents with excellent comprehensive adsorption performance, and seriously hinders the development of the adsorption method for efficient pollutant removal or resource recovery. Therefore, a new technology or evaluation method is needed to quantitatively evaluate the comprehensive adsorption performance, clarify the comprehensive performance, advantages and disadvantages of the adsorbent, and contribute to the removal of pollutants or the recycling of non-renewable resources by the adsorption method, the protection of the water environment, and the promotion of green economic development. Summary of the Invention

[0004] The present invention provides a method for comprehensively evaluating the adsorption performance of adsorption materials, constructs an affinity-adsorption capacity quadrant diagram, classifies the comprehensive evaluation of adsorption materials, has a simple form and is easy to establish, and helps to efficiently remove pollutants or recycle resources in natural water bodies.

[0005] The technical solution adopted by the present invention to solve its technical problems is: a method for comprehensively evaluating the adsorption performance of adsorption materials, comprising the following steps:

[0006] Step 1: Determine the number of adsorbents to be involved in the evaluation:

[0007] Suppose there are n kinds of adsorbents to be involved in the evaluation;

[0008] Step 2: Calculate the adsorption capacity and adsorption rate:

[0009] Calculate the maximum adsorption capacity and adsorption rate of n adsorbents at different initial concentrations of the same adsorbate respectively;

[0010] Step 3: Establish n initial concentration-adsorption rate fitting models:

[0011] Fit the different initial concentrations of the same adsorbate with the adsorption rates of the n adsorbents at different initial concentrations of the same adsorbate obtained in Step 2 to obtain n initial concentration-adsorption rate fitting models;

[0012] Step 4: Calculate the maximum adsorption rate V max and the initial concentration K 0.5 corresponding to half of the maximum adsorption rate:

[0013] According to the n initial concentration-adsorption rate fitting models obtained in Step 3, obtain the maximum adsorption rate V max of the n initial concentration-adsorption rate fitting models and the initial concentration K 0.5 corresponding to half of the maximum adsorption rate for the n models;

[0014] Step 5: Calculate the half-maximum adsorption rate V 0.5 of the n initial concentration-adsorption rate fitting models:

[0015] According to the maximum adsorption rate V max of the n initial concentration-adsorption rate fitting models obtained in Step 4, calculate the half-maximum adsorption rate V 0.5 of the n initial concentration-adsorption rate fitting models;

[0016] Step 6: Calculate the affinity tanα corresponding to the n adsorbents:

[0017] According to the initial concentration K 0.5 corresponding to half of the maximum adsorption rate for the n models obtained in Step 4, and the half-maximum adsorption rate V 0.5 of the n fitting models obtained in Step 5, calculate the affinity tanα corresponding to the n adsorbents;

[0018] Step 7: Draw an affinity-adsorption capacity quadrant diagram:

[0019] Construct an affinity-adsorption capacity quadrant diagram with the maximum adsorption capacities of the n adsorbents at different initial concentrations of the same adsorbate obtained in Step 2 and the affinities corresponding to the n adsorbents obtained in Step 6;

[0020] Step 8: Divide the n adsorbents into three parts: the high-affinity and low-adsorption capacity region in Area A, the high-adsorption capacity and low-affinity region in Area B, and the low-adsorption capacity and low-affinity region in Area C;

[0021] Step 9. Select the required adsorbent: According to the requirements of the current working condition, select the adsorbent in the corresponding area among the three parts of Area A, Area B, and Area C divided in Step 8 as the adsorbent required for the current working condition.

[0022] As a further preference of the present invention, in Step 3, the fitting model formula is as follows:

[0023]

[0024] In Formula (1), V is the adsorption rate of the adsorbent at different initial concentrations of the same adsorbate; C 0 is the initial concentration of the adsorbate.

[0025] As a further preference of the present invention, in Step 5, the calculation formula for the half-maximum adsorption rate V 0.5 is as follows:

[0026]

[0027] As a further preference of the present invention, in Step 6, the calculation formula for the affinity tanα is as follows:

[0028]

[0029] As a further preference of the present invention, in Step 8, the three parts of Area A, Area B, and Area C specifically include the following steps: Step 8-1. Find the center point of the affinity-adsorption capacity quadrant diagram, and use the median of the adsorption capacity as the abscissa of the center point of the affinity-adsorption capacity quadrant diagram, and the median of the affinity as the ordinate of the center point of the affinity-adsorption capacity quadrant diagram;

[0030] Step 8-2. Take the center point of the affinity-adsorption capacity quadrant diagram as the origin, draw lines from the direction perpendicular to the abscissa and the direction of the ordinate, and mark the intersection point of the two drawn vertical lines as point E. The abscissa of point E is the maximum adsorption capacity, and the ordinate of point E is the maximum affinity. Connect the origin and point E, thereby dividing the affinity-adsorption capacity quadrant diagram into three parts: Area A with high affinity and low adsorption capacity, Area B with high adsorption capacity and low affinity, and Area C with low adsorption capacity and low affinity.

[0031] As a further preference of the present invention, the adsorbate is phosphorus.

[0032] Through the above technical solutions, compared with the prior art, the present invention has the following beneficial effects:

[0033] The present invention proposes a calculation method for the affinity of an adsorbent based on the phosphorus removal rate of the adsorbent, describes the change in the adsorption rate caused by the change in the unit phosphorus concentration, constructs an affinity-adsorption capacity quadrant diagram, comprehensively evaluates and classifies the adsorption materials, which has a simple form and is easy to establish, solves the current situation that it is difficult to match the utilization of the adsorbent with the actual needs of the complex water environment, and contributes to the ecological restoration of natural waters and the recycling of non-renewable resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The present invention will be further described below with reference to the drawings and embodiments.

[0035] Figure 1 It is a fitting result diagram of the adsorption rate and initial concentration curve of the adsorbent in Embodiment 1 of the present invention;

[0036] Figure 2 It is a quadrant partition result diagram of the adsorbent affinity and adsorption capacity in Embodiment 1 of the present invention;

[0037] Figure 3 It is a fitting result diagram of the adsorption rate and initial concentration curve of the adsorbent in Embodiment 2 of the present invention;

[0038] Figure 4 It is a quadrant partition result diagram of the adsorbent affinity and adsorption capacity in Embodiment 2 of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0039] The present invention will now be further described in detail with reference to the drawings. These drawings are all simplified schematic diagrams, only illustrating the basic structure of the present invention in a schematic manner, so they only show the components related to the present invention.

[0040] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by terms such as "left side", "right side", "upper part", "lower part", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. "First", "second", etc. do not represent the importance of the components, so they cannot be understood as limitations to the present invention. The specific dimensions adopted in this embodiment are only for illustrating the technical solution by way of example, and do not limit the protection scope of the present invention.

[0041] Affinity specifically refers to the association characteristics between one atom and another atom in the chemical field, and can be used to judge the degree of association between the adsorbent and the adsorbate. The present invention provides a method for comprehensively evaluating the adsorption performance of adsorption materials, which describes the change in the adsorption rate caused by the change in the unit concentration of the adsorbate. By combining the affinity and adsorption capacity of the adsorbent, an affinity-adsorption capacity quadrant diagram is constructed to comprehensively evaluate and classify the adsorption materials, contributing to the ecological restoration of natural waters and the recycling of non-renewable resources.

[0042] Example 1

[0043] This example provides a preferred implementation scheme, as Figure 1 and Figure 2 shown, a method for comprehensively evaluating the adsorption performance of an adsorbent material, comprising the following steps:

[0044] Step 1: Determine the number of adsorbents to be involved in the evaluation:

[0045] Suppose there are n kinds of adsorbents to be involved in the evaluation. In this example, n is 20 kinds.

[0046] Step 2: Calculate the adsorption capacity and adsorption rate:

[0047] Calculate the maximum adsorption capacity and adsorption rate of n kinds of adsorbents at different initial concentrations of the same adsorbate respectively;

[0048] Specifically, taking the literature of

Adsorptive removal of phosphate from aqueous solutions using iron oxide tailings

[0049] Table 1 Adsorption capacity and adsorption rate at different initial concentrations

[0050] Initial phosphorus concentration (mg / L) Adsorption capacity (mg / g) Adsorption rate (mg / g·h) 5.108 2.365 0.4729 10.51 3.953 0.7905 20.37 5.957 1.191 40.56 7.129 1.426 70.45 7.546 1.509 100.2 7.949 1.590 150.7 9.070 1.814

[0051] Step 3: Establish n initial concentration - adsorption rate fitting models:

[0052] Fit the different initial concentrations of the same adsorbate with the adsorption rates of n kinds of adsorbents at different initial concentrations of the same adsorbate obtained in Step 2 to obtain n initial concentration - adsorption rate fitting models;

[0053] Specifically, in Step 3, the fitting model formula is as follows:

[0054]

[0055] In formula (1), V is the adsorption rate of the adsorbent at different initial concentrations of the same adsorbate; C 0 is the initial concentration of the adsorbate.

[0056] Step 4: Calculate the maximum adsorption rate V max of each initial concentration - adsorption rate fitting model and the initial concentration K 0.5 corresponding to half of the maximum adsorption rate:

[0057] According to the n initial concentration-adsorption rate fitting models obtained in step 3, the maximum adsorption rate V of the n initial concentration-adsorption rate fitting models is obtained. max and the initial concentration K corresponding to half of the maximum adsorption rate for the n models. 0.5 ;

[0058] Specifically, for one of the n adsorbents, the maximum adsorption rate V max = 1.892 mg / g·h, and for one of the n adsorbents, the initial concentration K corresponding to half of the maximum adsorption rate 0.5 = 14.05 mg / L.

[0059] Step 5. Calculate the half-maximum adsorption rate V of the n initial concentration-adsorption rate fitting models: 0.5 :

[0060] According to the maximum adsorption rate V of the n initial concentration-adsorption rate fitting models obtained in step 4 max , calculate the half-maximum adsorption rate V of the n initial concentration-adsorption rate fitting models 0.5 ;

[0061] Furthermore, in step 5, the calculation formula for the half-maximum adsorption rate V 0.5 is as follows:

[0062]

[0063] Specifically, for one of the n adsorbents, the half-maximum adsorption rate V 0.5 = 0.9459 mg / g·h.

[0064] Step 6. Calculate the affinity tanα corresponding to the n adsorbents:

[0065] According to the initial concentration K corresponding to half of the maximum adsorption rate for the n models obtained in step 4 0.5 , and the half-maximum adsorption rate V of the n fitting models obtained in step 5 0.5 , calculate the affinity tanα corresponding to the n adsorbents, and the results are shown in Table 2;

[0066] Table 2 Adsorption capacity, affinity and related fitting parameters of different adsorbents

[0067]

[0068]

[0069] Specifically, in step 6, the calculation formula for the affinity tanα is as follows:

[0070]

[0071] Step 7, draw an affinity-adsorption capacity quadrant diagram:

[0072] Construct an affinity-adsorption capacity quadrant diagram with the maximum adsorption capacities of the n adsorbents obtained in Step 2 at different initial concentrations of the same adsorbate and the affinities of the n adsorbents obtained in Step 6;

[0073] Step 8, divide the n adsorbents into three regions: Region A with high affinity and low adsorption capacity, which is suitable for the restoration of eutrophic natural water bodies; Region B with high adsorption capacity and low affinity, which is suitable for the treatment of industrial high-concentration phosphorus-containing wastewater; Region C with low adsorption capacity and low affinity, and the performance of the adsorbents in Region C needs to be further improved before application.

[0074] Specifically, in Step 8, the division of the three parts of Region A, Region B, and Region C includes the following steps:

[0075] Step 8-1, find the center point of the affinity-adsorption capacity quadrant diagram, take the median of the adsorption capacity as the abscissa of the center point of the affinity-adsorption capacity quadrant diagram, and take the median of the affinity as the ordinate of the center point of the affinity-adsorption capacity quadrant diagram;

[0076] That is, in this embodiment, taking (37.86, 0.1334) as the center point, the performance of the selected 20 adsorbents is divided into regions.

[0077] Step 8-2, as Figure 2 shown, taking the center point of the affinity-adsorption capacity quadrant diagram as the origin, draw lines from the direction perpendicular to the abscissa and the direction of the ordinate. The intersection point of the two drawn vertical lines is denoted as point E. The abscissa of point E is the maximum adsorption capacity, and the ordinate of point E is the maximum affinity. Connect the origin and point E, thereby dividing the affinity-adsorption capacity quadrant diagram into three parts: Region A with high affinity and low adsorption capacity, Region B with high adsorption capacity and low affinity, and Region C with low adsorption capacity and low affinity.

[0078] Step 9, select the required adsorbent: According to the requirements of the current working condition, select the adsorbent in the corresponding region among the three parts of Region A, Region B, and Region C divided in Step 8 as the adsorbent required for the current working condition.

[0079] Example 2

[0080] This embodiment provides a preferred implementation method. As Figure 3 and Figure 4 shown, a method for comprehensively evaluating the adsorption performance of an adsorption material includes the following steps:

[0081] Step 1, determine the number of adsorbents to be involved in the evaluation:

[0082] Suppose there are n adsorbents to be evaluated, and in this embodiment, n is 21 kinds.

[0083] Step 2: Calculate the adsorption capacity and adsorption rate:

[0084] Calculate the maximum adsorption capacity and adsorption rate of n adsorbents at different initial concentrations of the same adsorbate respectively;

[0085] Specifically, taking the literature

Effective and Selective Adsorption of Phosphate from Aqueous Solution via Trivalent-Metals-Based Amino-MIL-101 MOFs

[0086] Table 3 Adsorption capacity and adsorption rate at different initial concentrations

[0087]

[0088] Step 3: Establish n initial concentration-adsorption rate fitting models:

[0089] Fit the different initial concentrations of the same adsorbate with the adsorption rates of n adsorbents at different initial concentrations of the same adsorbate obtained in Step 2 to obtain n initial concentration-adsorption rate fitting models;

[0090] Specifically, in Step 3, the fitting model formula is as follows:

[0091]

[0092] In formula (1), V is the adsorption rate of the adsorbent at different initial concentrations of the same adsorbate; C 0 is the initial concentration of the adsorbate.

[0093] Step 4: Calculate the maximum adsorption rate V max of each initial concentration-adsorption rate fitting model and the initial concentration K 0.5 corresponding to half of the maximum adsorption rate:

[0094] According to the n initial concentration-adsorption rate fitting models obtained in Step 3, obtain the maximum adsorption rate V max of the n initial concentration-adsorption rate fitting models and the initial concentration K 0.5 corresponding to half of the maximum adsorption rate for the n models;

[0095] Specifically, the maximum adsorption rate V max= 73.90 mg / g·h, the initial concentration K corresponding to half of the maximum adsorption rate of one of the n adsorbents 0.5 = 130.0 mg / L.

[0096] Step 5, calculate the half-maximum adsorption rate V of the n initial concentration-adsorption rate fitting models 0.5 :

[0097] According to the maximum adsorption rate V of the n initial concentration-adsorption rate fitting models obtained in Step 4 max , calculate the half-maximum adsorption rate V of the n initial concentration-adsorption rate fitting models 0.5 ;

[0098] Furthermore, in Step 5, the formula for calculating the half-maximum adsorption rate V 0.5 is as follows:

[0099]

[0100] Specifically, the half-maximum adsorption rate V of one of the n adsorbents 0.5 = 36.95 mg / g·h.

[0101] Step 6, calculate the affinity tanα corresponding to the n adsorbents:

[0102] According to the initial concentration K corresponding to half of the maximum adsorption rate of the n obtained in Step 4 0.5 , and the half-maximum adsorption rate V of the n fitting models obtained in Step 5 0.5 , calculate the affinity tanα corresponding to the n adsorbents, and the results are shown in Table 4.

[0103] Table 4 Adsorption capacity, affinity and related fitting parameters of different adsorbents

[0104]

[0105]

[0106] Specifically, in Step 6, the formula for calculating the affinity tanα is as follows:

[0107]

[0108] Step 7, draw a quadrant diagram of affinity-adsorption capacity:

[0109] Fit the maximum adsorption capacity of the n adsorbents obtained in Step 2 at different initial concentrations of the same adsorbate with the affinity corresponding to the n adsorbents obtained in Step 6, and draw a quadrant diagram of affinity-adsorption capacity;

[0110] Step 8: Divide the n adsorbents into area A with high affinity and low adsorption capacity, which is suitable for the restoration of eutrophic natural water bodies; area B with high adsorption capacity and low affinity, which is suitable for the treatment of industrial high-concentration phosphorus-containing wastewater; and area C with low adsorption capacity and low affinity. The performance of the adsorbents in area C needs to be further improved before they can be applied.

[0111] Specifically, in step 8, the division of the three parts, area A, area B, and area C, includes the following steps:

[0112] Step 8-1: Find the center point of the affinity-adsorption capacity quadrant diagram. Take the median of the adsorption capacity as the abscissa of the center point of the affinity-adsorption capacity quadrant diagram, and the median of the affinity as the ordinate of the center point of the affinity-adsorption capacity quadrant diagram.

[0113] That is, in this embodiment, with (35.09, 0.058345986) as the center point, the performance of the selected 20 adsorbents is partitioned.

[0114] Step 8-2: As Figure 4 shown, with the center point of the affinity-adsorption capacity quadrant diagram as the origin, draw lines from the direction perpendicular to the abscissa and the direction of the ordinate. The intersection point of the two drawn vertical lines is denoted as point E. The abscissa of point E is the maximum adsorption capacity, and the ordinate of point E is the maximum affinity. Connect the origin and point E, thereby dividing the affinity-adsorption capacity quadrant diagram into three parts: area A with high affinity and low adsorption capacity, area B with high adsorption capacity and low affinity, and area C with low adsorption capacity and low affinity.

[0115] Step 9: Select the required adsorbent: According to the requirements of the current working condition, select the adsorbent in the corresponding area among the three parts, area A, area B, and area C, divided in step 8 as the adsorbent required for the current working condition.

[0116] Those skilled in the art of this technology can understand that unless otherwise defined, all terms (including technical terms and scientific terms) used here have the same meaning as the general understanding of those of ordinary skill in the field to which this application belongs. It should also be understood that terms such as those defined in a general dictionary should be understood to have a meaning consistent with the meaning in the context of the prior art, and will not be interpreted with an idealized or overly formal meaning unless defined as here.

[0117] The meaning of "and / or" as described in this application refers to the situation where each exists alone or both exist simultaneously.

[0118] The meaning of "connection" as described in this application can be a direct connection between components or an indirect connection between components through other components.

[0119] Inspired by the above-described ideal embodiments of the present invention, through the above description, relevant staff can completely make various changes and modifications without departing from the technical idea of the present invention. The technical scope of the present invention is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A method for comprehensively evaluating the adsorption performance of an adsorbent material, characterized in that, it includes the following steps: Step 1. Determine the number of adsorbents to be involved in the evaluation: Suppose there are n kinds of adsorbents to be involved in the evaluation; Step 2. Calculate the adsorption capacity and adsorption rate: Calculate the maximum adsorption capacity and adsorption rate of n kinds of adsorbents at different initial concentrations of the same adsorbate respectively; Step 3. Establish n initial concentration-adsorption rate fitting models: Fit different initial concentrations of the same adsorbate with the adsorption rates of n kinds of adsorbents at different initial concentrations of the same adsorbate obtained in Step 2 to obtain n initial concentration-adsorption rate fitting models; Step 4: Calculate the maximum adsorption rate V of each initial concentration-adsorption rate fitting model max and the corresponding initial concentration K when reaching half of the maximum adsorption rate 0.5 : According to the n initial concentration-adsorption rate fitting models obtained in step 3, the maximum adsorption rate V of the n initial concentration-adsorption rate fitting models is obtained max and the initial concentration K corresponding to half of the maximum adsorption rate for the n models 0.5 ; Step 5. Calculate the half-maximal adsorption rate V of the n initial concentration-adsorption rate fitting models 0.5 : According to the maximum adsorption rate V of the n initial concentration-adsorption rate fitting models obtained in step 4 max , calculate the half-maximum adsorption rate V of the n initial concentration-adsorption rate fitting models 0.5 ; Step 6. Calculate the affinity tanα corresponding to n kinds of adsorbents: According to the n initial concentrations K corresponding to half of the maximum adsorption rate obtained in step 4 0.5 , and the half-maximum adsorption rates V of the n fitting models obtained in step 5 0.5 , calculate the affinity tanα corresponding to the n adsorbents; Step 7. Draw an affinity-adsorption capacity quadrant diagram: Construct an affinity-adsorption capacity quadrant diagram with the maximum adsorption capacities of n kinds of adsorbents at different initial concentrations of the same adsorbate obtained in Step 2 and the affinities corresponding to n kinds of adsorbents obtained in Step 6; Step 8. Divide the n kinds of adsorbents into three parts: the high-affinity and low-adsorption capacity area in Region A, the high-adsorption capacity and low-affinity area in Region B, and the low-adsorption capacity and low-affinity area in Region C; Step 9. Select the required adsorbent: According to the requirements of the current working condition, select the adsorbent in the corresponding area among the three parts of Region A, Region B, and Region C divided in Step 8 as the adsorbent required for the current working condition; In Step 3, the fitting model formula is as follows: Formula (1) In formula (1), V is the adsorption rate of the adsorbent at different initial concentrations of the same adsorbate; C 0 is the initial concentration of the adsorbate; In step 5, the semi-maximal adsorption rate V 0.5 is calculated as follows: Formula (2); In Step 6, the calculation formula for the affinity tanα is as follows: Formula (3).

2. The method for comprehensively evaluating the adsorption performance of an adsorbent material according to claim 1, characterized in that, in Step 8, the three parts of Region A, Region B, and Region C specifically include the following steps: Step 8-1. Find the center point of the affinity-adsorption capacity quadrant diagram, take the median of the adsorption capacity as the abscissa of the center point of the affinity-adsorption capacity quadrant diagram, and the median of the affinity as the ordinate of the center point of the affinity-adsorption capacity quadrant diagram; Step 8-2. Take the center point of the affinity-adsorption capacity quadrant diagram as the origin, draw lines from the direction perpendicular to the abscissa and the direction of the ordinate, and mark the intersection point of the two drawn vertical lines as point E. The abscissa of point E is the maximum adsorption capacity, and the ordinate of point E is the maximum affinity. Connect the origin and point E, thereby dividing the affinity-adsorption capacity quadrant diagram into three parts: the high-affinity and low-adsorption capacity area in Region A, the high-adsorption capacity and low-affinity area in Region B, and the low-adsorption capacity and low-affinity area in Region C.

3. The method for comprehensively evaluating the adsorption performance of an adsorbent material according to claim 1, characterized in that: The adsorbate is phosphorus.

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