An absorbent material for medical waste liquid and its preparation method and application

Abstract

The present application belongs to the technical field of medical waste treatment, and specifically relates to an absorption material for medical waste liquid, a preparation method and application thereof. The absorption material comprises 60-85 wt% polypropylene fibers for forming a three-dimensional skeleton, 4-15 wt% cross-linked sodium polyacrylate dispersed in the three-dimensional skeleton for absorbing an aqueous phase and forming a hydrogel, 4-15 wt% adsorption fibers from waste medical textiles, and 4-15 wt% inorganic materials configured to simultaneously perform two functions: (i) providing polyvalent cation cross-linking of the hydrogel to enhance the gel strength; and (ii) serving as a sulfur fixation agent in incineration treatment. Experimental results show that the absorption material can quickly form an integrated gel block after contacting with a simulated waste liquid, effectively preventing liquid leakage; after adsorption saturation and incineration at a temperature of 850 DEG C or higher, the ash content is less than or equal to 15%, and no harmful gas is discharged. The absorption and solidification treatment is suitable for anesthesia waste liquid in an operating room and various types of medical waste liquid.

Description

Technical Field

[0001] This invention belongs to the field of medical waste treatment technology, specifically, it relates to an absorbent material for medical waste liquid, its preparation method and application. Background Technology

[0002] In the medical field, the treatment of anesthetic waste (such as sevoflurane and propofol) in operating rooms and post-anesthesia care units has always faced severe challenges. Traditional treatment methods, whether direct incineration, chemical neutralization, or relying on ordinary absorbent materials for adsorption and subsequent disposal, all have certain limitations. First, ordinary absorbent materials have limited liquid retention capacity, making waste liquid prone to leakage, leading to occupational exposure risks for medical staff and increasing the possibility of secondary environmental pollution. Second, at the final disposal level, if incineration is used, the waste liquid adsorbed by existing materials may produce sulfur dioxide, harmful fumes or residues containing heavy metals during the incineration process, which does not meet the requirements of green healthcare. In addition, existing absorbent materials mostly rely on the production of virgin chemical raw materials, failing to achieve resource recycling within the medical system. Although some materials in existing technologies can achieve basic adsorption functions, they often cannot simultaneously meet the multiple requirements of clinical operation safety and environmentally friendly end-of-life disposal: they are difficult to gel and solidify at the moment of absorption to prevent leakage, and cannot achieve clean combustion in the subsequent unavoidable incineration disposal. Furthermore, their material sources rarely consider the reuse of waste resources. Summary of the Invention

[0003] The present invention aims to overcome the shortcomings of the prior art and provide an absorbent material for medical waste liquid. This material can quickly absorb and gel the waste liquid and prevent leakage. At the same time, its component design takes into account the environmental protection of waste resource utilization and end-of-pipe incineration treatment.

[0004] To achieve the above objectives, the technical solution of the present invention is as follows: an absorbent material for medical waste liquid, comprising the following components: 60-85 wt% polypropylene fiber for forming a three-dimensional skeleton structure; 4-15 wt% cross-linked sodium polyacrylate dispersed in the three-dimensional skeleton for rapidly absorbing aqueous components and forming a hydrogel; 4-15 wt% adsorption fiber, the adsorption fiber being derived from waste medical textiles and used after sterilization; and 4-15 wt% inorganic material; wherein the inorganic material is configured to simultaneously achieve the following two functions: (i) providing polyvalent cations to cross-link the hydrogel formed by the cross-linked sodium polyacrylate, significantly enhancing the strength of the formed hydrogel; (ii) in the incineration treatment after the absorbent material adsorbs the waste liquid, acting as a sulfur-fixing agent to react with sulfur-containing pollutants and reduce the emission of harmful gases such as sulfur dioxide.

[0005] Furthermore, the adsorbent material comprises 70-72 wt% polypropylene fiber, 9-10 wt% cross-linked sodium polyacrylate, 4-5 wt% soda lime, and 14-15 wt% adsorbent fiber. This ratio helps optimize the synergistic effect among the components and balance the adsorption of the oil and aqueous phases.

[0006] In a preferred embodiment, the inorganic material includes calcium compounds, such as calcium hydroxide, calcium oxide, calcium carbonate, or combinations thereof. More preferably, the inorganic material is soda lime that has undergone ultraviolet disinfection treatment, which provides both a sufficient source of calcium ions and a certain degree of disinfection.

[0007] In a preferred embodiment, the length of the polypropylene fibers is controlled at 20 mm ± 1 mm, and the diameter is controlled at 20-100 micrometers. Fibers of this specification easily form a uniform and robust three-dimensional network. The adsorbent fibers are preferably derived from discarded medical masks and gauze, and are cut to approximately 10 mm² ± 2 mm after sterilization to facilitate dispersion and adsorption.

[0008] As a preferred embodiment, the absorbent material may further include a pH-sensitive indicator, which provides a visual signal through color change when absorbing waste liquid with a specific pH value, intuitively indicating the liquid absorption state and saturation level of the material.

[0009] This invention also provides a method for preparing the absorbent material, characterized by comprising a simple dry physical mixing of the polypropylene fiber, cross-linked sodium polyacrylate, adsorption fiber, and inorganic material (and optionally an indicator) in the above proportions. This method is extremely simple, requires no complex equipment, and is suitable for large-scale production and rapid on-site preparation.

[0010] The present invention further provides the application of the absorbent material in the absorption and solidification of medical waste liquid, particularly anesthetic waste liquid.

[0011] Furthermore, the present invention provides a method for treating medical waste liquid, characterized in that it includes: a) contacting the medical waste liquid with the absorbent material described in any one of the above claims until the waste liquid is fully absorbed and solidified; and b) incinerating the saturated absorbent material at a temperature of 850°C or higher.

[0012] The significant advantages of this invention compared to the prior art are as follows: (1) The adsorbent material of this application uses polypropylene fibers to form a three-dimensional skeleton, cross-linked sodium polyacrylate (SAP) as the core component, and adsorbent fibers from waste medical textiles, which are then mixed by a dry method. After absorbing various waste liquids, all the sample samples in the examples can eventually form an integrated block that does not fall apart when lifted with tweezers; leakage tests show no continuous liquid leakage. Among them, Example 4 lost its fluidity within 8 seconds after absorbing a water-oil mixed waste liquid and completely solidified after 30 minutes, with an initial leakage of only 0.1g. These experimental phenomena show that the material provided by this application can effectively prevent waste liquid leakage and improve operational safety.

[0013] (2) The absorbent material of this application introduces a specific calcium compound (such as soda lime) as an inorganic component, which enables it to perform dual functions at the same time: On the one hand, the calcium ions released by it can crosslink SAP to enhance the strength of the hydrogel. In Example 2 of Verification, after the absorption of oil phase waste liquid in Example 2, the gel strength continued to increase over time. After 2 hours, it turned into a tough gel, and after 8 hours, it no longer precipitated, thus enhancing the liquid-locking and leak-proof ability. On the other hand, this component acts as a sulfur fixative in the incineration treatment of the absorbent material to fix sulfur elements. After the material is saturated with adsorption, the ash content is about 12% after incineration at 850°C. No obvious black smoke was observed during the incineration process, and sulfur dioxide was not detected in the flue gas.

[0014] (3) In the raw materials of the adsorbent material of this application, the adsorbent fiber is directly derived from waste medical textiles such as masks and gauze, and the inorganic material can also be derived from medical system waste (such as waste soda lime from anesthesia machines). Verification Examples 1 and 2 show that the sample examples based on these recycled raw materials all exhibit excellent adsorption and solidification performance, which helps to realize the resource recycling of medical solid waste into efficient waste liquid treatment materials, significantly reducing raw material costs while conforming to the concept of green medical development. Detailed Implementation

[0015] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0016] The term "embodiment" as used herein means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in multiple embodiments of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0017] General Implementation Examples

[0018] An absorbent material for medical waste liquid is prepared by the following method: S1: Raw material preparation.

[0019] Polypropylene fibers, with a length controlled at 20mm±1mm and a diameter of 20~100 micrometers; Crosslinked sodium polyacrylate (SAP); The inorganic material is selected from sodium lime powder and is sterilized by ultraviolet light before use. The absorbent fibers are selected from discarded medical masks and gauze, and are cut to a size of approximately 10mm² after disinfection.

[0020] The indicator, selected from moisture-sensitive color-changing granules, was purchased from Shanghai Yanding Desiccant Co., Ltd.; the color-changing silica gel is orange that turns green when moist.

[0021] S2: Dry mixing The above components are mixed in a mixer according to the target mass percentages: 60-85 wt% polypropylene fiber, 4-15 wt% SAP, 4-15 wt% soda lime, and 4-15 wt% adsorbent fiber. The mixture is then thoroughly mixed using a dry method at room temperature to obtain the absorbent material. An indicator may optionally be added.

[0022] This invention systematically investigated the effects of four components—polypropylene fiber, soda lime, SAP, and adsorption fiber—on material properties by designing experimental groups with different proportions. The theoretical mass percentages of each experimental group are shown in the table below: Table 1 Experimental Design Proportion Table (Theoretical Percentage)

[0023] Note: The percentages in the table are theoretical design values. In actual preparation, the proportions of each group will be converted to dry basis mass, and the total mass of the absorbent material (excluding indicator) will be controlled to be 10g.

[0024] Examples 1-9 Following the method and raw material types described in the general embodiments, and based on the design proportions in Table 1, the proportions of each group were converted to actual weighing mass (based on a total dry basis of 10g of absorbent material), and 14.56g of indicator was added. The mixture was then dry-mixed thoroughly to obtain absorbent material samples M1-M9. The specific compositions of each embodiment are shown in the following table: Table 2 Composition of absorbent materials in Examples 1-9 (dry basis, excluding indicator)

[0025] Note: The indicator in Examples 1 to 9 is 14.56g.

[0026] Verification Example 1: Basic Adsorption Performance Test of Absorbent Materials Testing standards: Adsorption capacity: The adsorbent materials (M1-M9) obtained in Examples 1 to 9 were immersed in excess deionized water and emulsified soybean oil, respectively, and left to stand for 30 min, 2 h, 8 h and 24 h, respectively. After being taken out and drained, the adsorption capacity per unit mass of material (g / g) was calculated.

[0027] Coefficient of volume expansion: The volume ratio of a sample before and after it becomes saturated with water.

[0028] Table 3 Water absorption properties of absorbent materials:

[0029] Table 4 Oil absorption properties of absorbent materials:

[0030] As shown in Tables 1 and 2, the absorbent material of the present invention exhibits significant adsorption capacity for both aqueous and oily waste liquids; among which, For aqueous phase adsorption: Sample M4 (Example 4) exhibited the best overall water absorption performance, with the highest maximum adsorption capacity in 24 hours (115.24 g / g), the largest volume expansion coefficient (5.05), and the adsorption capacity reached 77.8% of the maximum value in 30 minutes, demonstrating rapid water absorption characteristics.

[0031] For oil phase adsorption: M2 (Example 2) exhibited the strongest oil adsorption capacity (42.41 g / g), and the adsorption reached saturation within 30 minutes (data remained constant at all time points), indicating that its adsorption and fixation rate for the oil phase was extremely fast. M6 (Example 6) also demonstrated excellent oil adsorption capacity (31.10 g / g, ranking second).

[0032] Overall performance: While maintaining good oil absorption capacity (ranked 4th), M4 has the best overall water absorption performance, demonstrating its potential as a broad-spectrum medical waste absorption material.

[0033] Verification Example 2: Dynamic Phenomena of the Absorption Process and Characterization of Leakage Prevention Performance 1. Testing Standards Samples M1-M9 were taken separately and contacted with a quantitative amount of simulated medical waste liquid (emulsified soybean oil, copper sulfate solution, or a mixture thereof). The following indicators were observed and recorded at time points of 1 minute, 30 minutes, 2 hours, 8 hours, and 24 hours: (1) Color and distribution The diffusion range and uniformity of copper sulfate solution; Does the emulsified soybean oil turn yellow overall or does it develop yellow spots? If it has spots, measure the diameter. The overall color of the material changes.

[0034] (2) Liquidity Tilt the bottle at 45° and record the time (in seconds) it takes for the colloid to flow from the bottom of the bottle to the cap. Press with a glass rod and record the state of the material: powder, sand, wet lump, viscous paste, tough gel, no longer flowing.

[0035] (3) Oil / water separation phenomenon After standing, does the oil or aqueous phase re-precipitate? If precipitation occurs, remove the paper towel and absorb the precipitate, then weigh the precipitate (g).

[0036] (4) Structural morphology Macroscopic form: After molding, is it a monolithic block or a loose, easily disintegrated mass? Structural integrity: If you gently lift it with tweezers, will it fall apart? Internal uniformity: Cut open the gel block with scissors and observe whether the interior is uniform or has obvious sandwich or channel structures. Phase separation observation: Is the oil phase concentrated in certain areas (e.g., wrapped by polypropylene fibers)? (Yes / No) Fiber entanglement state: Have the long fibers formed an entangled structure, wrapping the wet SAP and fibers within it? Microcapsule formation: Does the fiber physically encapsulate copper sulfate crystals or oil droplets to form microcapsules? (5) Process phenomena Do you feel a temperature change when you touch the outer wall of the container? The visual time it takes for the liquid to be completely absorbed (the time it takes for the material surface to change from wet and reflective to matte) is recorded in seconds.

[0037] (6) Leakage test Remove the material block and place it on a sieve lined with dry filter paper. Let it stand for 10 minutes, observe the filter paper for water or oil stains, and record the results. The color of the water stains; Size of the water stain (measure diameter, cm); Size of the oil stain (measure diameter, cm).

[0038] Blank or missing data in some test batches indicates that this item was not recorded.

[0039] 2. Experimental Results 1) Sample M1 (Example 1) - Oil Phase Test Composition of absorbent material: 8.24g polypropylene fiber, 0.59g SAP, 0.59g soda lime, 0.59g adsorbent fiber, 14.56g indicator; Simulated waste liquid: 0g copper sulfate solution, 21.7g emulsified soybean oil.

[0040]

[0041] 2) Sample M1 (Example 1) - Water-oil mixing test Composition of absorbent material: 8.24g polypropylene fiber, 0.59g SAP, 0.59g soda lime, 0.59g adsorbent fiber, 14.56g indicator; Simulated waste liquid: 19.2g copper sulfate solution, 19.2g emulsified soybean oil.

[0042]

[0043] 3) Sample M2 (Example 2) - Oil Phase Test Composition of absorbent material: 7.0g polypropylene fiber, 1.0g SAP, 1.0g soda lime, 1.0g adsorbent fiber, 14.56g indicator; Simulated waste liquid: 0g copper sulfate solution, 27.85g emulsified soybean oil.

[0044]

[0045] 4) Sample M2 (Example 2) – Water-oil mixing test Composition of absorbent material: 7.0g polypropylene fiber, 1.0g SAP, 1.0g soda lime, 1.0g adsorbent fiber, 14.56g indicator; Simulated waste liquid: 30.26g copper sulfate solution, 18g emulsified soybean oil.

[0046]

[0047] 5) Sample M3 (Example 3) - Oil Phase Test Composition of absorbent material: 6.09g polypropylene fiber, 1.3g SAP, 1.3g soda lime, 1.3g adsorbent fiber, 14.56g indicator; Simulated waste liquid: 0g copper sulfate solution, 28.11g emulsified soybean oil.

[0048]

[0049] 6) Sample M3 (Example 3) – Water-oil mixing test Composition of absorbent material: 6.09g polypropylene fiber, 1.3g SAP, 1.3g soda lime, 1.3g adsorbent fiber (no indicator). Simulated waste liquid: 21.59g copper sulfate solution, 17.1g emulsified soybean oil.

[0050]

[0051] 7) Sample M4 (Example 4) - Oil Phase Test Composition of absorbent material: 7.14g polypropylene fiber, 0.95g SAP, 0.48g soda lime, 1.43g adsorbent fiber, 14.56g indicator; Simulated waste liquid: 0g copper sulfate solution, 24.39g emulsified soybean oil.

[0052]

[0053] 8) Sample M4 (Example 4) – Water-oil mixing test Composition of absorbent material: 7.14g polypropylene fiber, 0.95g SAP, 0.48g soda lime, 1.43g adsorbent fiber, 14.56g indicator; Simulated waste liquid: 18.02g copper sulfate solution, 18.02g emulsified soybean oil.

[0054]

[0055] 9) Sample M5 (Example 5) - Oil Phase Test Composition of absorbent material: 7.14g polypropylene fiber, 1.43g SAP, 0.95g soda lime, 0.48g adsorbent fiber, 14.56g indicator; Simulated waste liquid: 0g copper sulfate solution, 22.59g emulsified soybean oil.

[0056]

[0057] 10) Sample M5 (Example 5) – Water-oil mixing test Composition of absorbent material: 7.14g polypropylene fiber, 1.43g SAP, 0.95g soda lime, 0.48g adsorbent fiber, 14.56g indicator; Simulated waste liquid: 20g copper sulfate solution, 20g emulsified soybean oil.

[0058]

[0059] 11) Sample M6 (Example 6) - Aqueous Phase Test Composition of absorbent material: 7.14g polypropylene fiber, 0.48g SAP, 1.43g soda lime, 0.95g adsorbent fiber, 14.56g indicator; Simulated waste liquid: 28.5g copper sulfate solution, 0g emulsified soybean oil.

[0060]

[0061] 12) Sample M6 (Example 6) – Water-oil mixing test Composition of absorbent material: 7.14g polypropylene fiber, 0.48g SAP, 1.43g soda lime, 0.95g adsorbent fiber, 14.56g indicator; Simulated waste liquid: 19.4g copper sulfate solution, 19.4g emulsified soybean oil.

[0062]

[0063] 13) Sample M7 (Example 7) - Aqueous Phase Test Composition of absorbent material: 7.2g polypropylene fiber, 1.36g SAP, 0.45g soda lime, 0.91g adsorbent fiber, 14.56g indicator; Simulated waste liquid: 35.4g copper sulfate solution, 0g emulsified soybean oil.

[0064]

[0065] 14) Sample M7 (Example 7) - Oil Phase Test Composition of absorbent material: 7.2g polypropylene fiber, 1.36g SAP, 0.45g soda lime, 0.91g adsorbent fiber, 14.56g indicator; Simulated waste liquid: 0g copper sulfate solution, 31.1g emulsified soybean oil.

[0066]

[0067] 15) Sample M7 (Example 7) – Water-oil mixing test Composition of absorbent material: 7.2g polypropylene fiber, 1.36g SAP, 0.45g soda lime, 0.91g adsorbent fiber, 14.56g indicator; Simulated waste liquid: 22.54g copper sulfate solution, 22.54g emulsified soybean oil.

[0068]

[0069] 16) Sample M8 (Example 8) - Aqueous Phase Test Composition of absorbent material: 7.27g polypropylene fiber, 0.45g SAP, 0.91g soda lime, 1.36g adsorbent fiber, 14.56g indicator; Simulated waste liquid: 24.9g copper sulfate solution, 0g emulsified soybean oil

[0070] 17) Sample M8 (Example 8) - Oil Phase Test Composition of absorbent material: 7.27g polypropylene fiber, 0.45g SAP, 0.91g soda lime, 1.36g adsorbent fiber, 14.56g indicator; Simulated waste liquid: 0g copper sulfate solution, 21.68g emulsified soybean oil.

[0071]

[0072] 18) Sample M9 (Example 9) - Aqueous Phase Test Composition of absorbent material: 7.27g polypropylene fiber, 0.91g SAP, 1.36g soda lime, 0.45g adsorbent fiber, 14.56g indicator; Simulated waste liquid: 30.38g copper sulfate solution, 0g emulsified soybean oil.

[0073]

[0074] 19) Sample M9 (Example 9) - Oil Phase Test Composition of absorbent material: 7.27g polypropylene fiber, 0.91g SAP, 1.36g soda lime, 0.45g adsorbent fiber, 14.56g indicator; Simulated waste liquid: 0g copper sulfate solution, 20.42g emulsified soybean oil.

[0075]

[0076] 20) Sample M9 (Example 9) – Water-oil mixing test Composition of absorbent material: 7.27g polypropylene fiber, 0.91g SAP, 1.36g soda lime, 0.45g adsorbent fiber, 14.56g indicator; Simulated waste liquid: 15.5g copper sulfate solution, 15.5g emulsified soybean oil.

[0077]

[0078] 3. Conclusion Analyzing the experimental results of Verification Example 1 and Verification Example 2, we can see that: (1) All the samples in the examples (Examples 1-9) were able to form an integral block after absorbing various waste liquids (pure oil phase, pure water phase, and water-oil mixed phase), and they were able to form a solid whole that would not fall apart when lifted with tweezers. This shows that the three-dimensional skeleton constructed by polypropylene fibers and the adsorption fibers in this application can effectively constrain and encapsulate the gel formed after liquid absorption, preventing the material from dispersing.

[0079] (2) Compared with the proportions of Examples 1, 5, 8, and 9, Example 4 (M4) showed significantly improved water absorption and volume expansion coefficient, and significantly faster curing speed. As shown in Table 3, Example 4 ranked first in both 24-hour water absorption and volume expansion coefficient. As shown in Verification Example 2, Example 4 lost its fluidity within 8 seconds after absorbing the water-oil mixture waste liquid, and completely solidified after 30 minutes. The initial seepage amount was only 0.1g, which achieved the best water absorption performance and comprehensive anti-leakage effect.

[0080] (3) Compared with the ratios of Examples 1, 5, and 8, the oil adsorption capacity of Example 2 (M2) is significantly improved. As shown in Table 4, Example 2 has an oil adsorption capacity of 42.41 g / g, ranking first. As shown in Verification Example 2, after absorbing the oil phase waste liquid, the gel strength of Example 2 continues to increase over time. After 2 hours, it transforms into a tough gel, and after 8 hours, it no longer precipitates. It has good oil absorption performance and late-stage locking ability.

[0081] (4) Compared with the proportions of Examples 4 and 2, the anti-leakage performance of Examples 1, 5, 8 and 9 is poor. Verification Example 2 shows that in the oil phase test, Examples 1 and 5 always had oil precipitation and failed to completely lock in the liquid; in the aqueous phase test, Example 8 always had water seepage; although Example 9 cured quickly, the initial seepage was large (water stain 3cm).

[0082] This indicates that polypropylene fiber, as the main skeleton material in the absorbent material of this application, needs to maintain an appropriate ratio with SAP, soda lime, and adsorbent fiber. The data from the verification examples show that: too low SAP content (5% SAP in Example 1) will result in insufficient liquid absorption capacity; too high SAP content (15% SAP in Example 5) may affect the stability of the skeleton; too high soda lime content (15% soda lime in Example 9) will affect the water absorption performance; and an imbalance in the content of adsorbent fiber will also affect the overall structural integrity of the material.

[0083] (5) In summary, the absorbent material of the present invention can achieve rapid absorption and solidification of medical waste liquid, effectively preventing leakage. Among them, the formulation of Example 4 shows the best performance in terms of rapid absorption, instantaneous solidification, extremely low initial leakage and structural integrity; Examples 2 and 6 show excellent performance in terms of oil phase adsorption and rapid water phase solidification, respectively.

[0084] Application examples To further illustrate the effectiveness of the absorbent material of the present invention, the following describes the method of using the absorbent material in conjunction with specific application scenarios.

[0085] Application Example 1: Treatment of anesthetic waste in the operating room Take 50g of the absorbent material prepared in Example 4 and place it in a waste liquid collection box with a hole at the bottom. Place the collection box below the waste liquid outlet of the anesthesia machine. Turn on the anesthesia machine to discharge waste liquid. Simulate the contact between the anesthetic waste liquid (a mixture of sevoflurane and physiological saline) and the absorbent material. Observe that the waste liquid is rapidly absorbed. Within 10 seconds, the surface of the material loses its fluidity and forms an integrated gel block. There is no liquid leakage at the bottom of the collection box. After continuous collection for 8 hours, the saturated gel block is taken out. The saturated gel block is sent to a medical waste incinerator and incinerated at 850°C. After incineration, the ash content accounts for 12% of the dry basis of the absorbent material. No obvious black smoke is observed during the incineration process, and no harmful gases such as sulfur dioxide are detected in the flue gas.

[0086] Application Example 2: Waste Liquid Disposal in Primary Healthcare Institutions Take 20g of the absorbent material prepared in Example 4 and encapsulate it in a breathable non-woven fabric bag to make a portable waste liquid absorption bag. Pour the residual anesthetic waste liquid in the syringe or the liquid in the small waste liquid bottle directly onto the absorption bag and observe that the waste liquid is rapidly absorbed after contact with the material, and the surface of the material dries without any free liquid within 30 seconds. Place the used absorption bag into the medical waste temporary storage box, collect it together with other medical waste, and then send it to the medical waste incinerator for unified treatment.

[0087] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An absorbent material for medical waste liquid, characterized in that, include: 60-85 wt% polypropylene fibers are used to form a three-dimensional skeleton; 4~15 wt% of cross-linked sodium polyacrylate is dispersed in a three-dimensional framework to absorb the aqueous phase and form a hydrogel; 4-15 wt% of the absorbent fibers are derived from waste medical textiles; And 4-15 wt% of inorganic materials, said inorganic materials being configured to: (i) provide multivalent cation crosslinking of the hydrogel to enhance the strength of the formed hydrogel; and (ii) serve as a sulfur fixative in the incineration treatment of the absorbent material.

2. The absorbent material according to claim 1, characterized in that, It includes 70-72 wt% polypropylene fiber, 9-10 wt% cross-linked sodium polyacrylate, 4-5 wt% soda lime, and 14-15 wt% adsorption fiber.

3. The absorbent material according to claim 1 or 2, characterized in that, The inorganic material includes a calcium compound, which is selected from calcium hydroxide, calcium oxide, calcium carbonate, or a combination thereof.

4. The absorbent material according to claim 3, characterized in that, The inorganic material is sodium lime that has been sterilized by ultraviolet light.

5. The absorbent material according to claim 3, characterized in that, The length of the polypropylene fiber is controlled at 20mm ± 1mm, and the diameter is controlled at 20~100 micrometers; the absorbent fiber is selected from medical waste masks and gauze, and is cut into 10mm pieces after disinfection. 2 The dimensions are ±2mm.

6. The absorbent material according to claim 3, characterized in that, The absorbent material also includes a pH-sensitive indicator to indicate the liquid absorption state of the absorbent material via a visual signal.

7. A method for preparing the absorbent material according to any one of claims 1 to 6, characterized in that, This includes dry mixing the polypropylene fiber, cross-linked sodium polyacrylate, adsorption fiber, and inorganic materials in a certain proportion.

8. The use of the absorbent material as described in any one of claims 1-6 in the absorption and solidification of medical waste liquid.

9. The application according to claim 8, characterized in that, The medical waste liquid is anesthetic waste liquid.

10. A method for treating medical waste liquid, characterized in that, include: a) Contacting the medical waste liquid with the absorbent material according to any one of claims 1 to 6; and b) Incinerating the absorbent material after it has been saturated with adsorption at a temperature of ≥850°C.

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