A method for the innocuous treatment of seized drugs using seized chemicals

Abstract

The present application relates to the technical field of hazardous waste harmless treatment, and particularly relates to a method for using seized chemicals to harmlessly treat seized drugs, wherein seized peroxide oxidants are diluted and mixed with pretreated seized drugs to construct a homogeneous reaction system, and oxidative degradation is carried out in a normal temperature and pressure closed reactor under ultraviolet light field irradiation until psychoactive substances in the drugs are fully degraded. The wavelength of the ultraviolet light field is selected from 185 nm, 222 nm or 254 nm; and the dilution concentration of hydrogen peroxide is 2-30 mM. The present application directly uses seized hydrogen peroxide as an oxidant, and through ultraviolet light activation, hydroxyl radicals are generated to non-selectively attack psychoactive substances such as methamphetamine and caffeine in the drugs, so that the psychoactive substances are completely mineralized into carbon dioxide and water, and the degradation rate is more than 99%. The present application realizes waste treatment by waste, avoids the defects of toxic gas and dust generated by incineration, can be efficiently operated at normal temperature and pressure, and significantly reduces disposal cost and environmental risk.

Description

Technical Field

[0001] This invention relates to the field of hazardous waste harmless treatment technology, specifically to a method for harmlessly treating seized drugs using seized chemicals. Background Technology

[0003] When high-temperature incineration is used to process drugs, the complex composition of these drugs, containing various psychoactive substances and impurities such as methamphetamine, caffeine, and fentanyl, generates large amounts of toxic and harmful gases (such as dioxins, polycyclic aromatic hydrocarbons, and nitrogen oxides) during the incineration process. If these gases are not thoroughly purified, they will be directly released into the atmosphere, causing severe air pollution. More importantly, the toxic fumes and dust produced during incineration can cause irreversible damage to the respiratory and nervous systems of on-site personnel. Even with protective equipment, it is difficult to completely avoid inhalation hazards and exposure risks, posing a serious challenge to the occupational health of these personnel.

[0004] Hydrogen peroxide (H₂O₂), a commonly used oxidant in the illicit synthesis of drugs, is one of the most frequently seized prohibited chemicals. This type of seized hydrogen peroxide requires separate and standardized disposal. Given the numerous drawbacks of traditional incineration methods, exploring new green and harmless drug disposal technologies is urgently needed. Using seized hydrogen peroxide for homogeneous oxidation of seized drugs provides an innovative solution to this problem.

[0005] Compared with high-temperature incineration, using ultraviolet light to activate seized hydrogen peroxide for drug treatment has significant advantages: Firstly, the oxidation reaction process is gentle, which can completely mineralize and degrade psychoactive substances in drugs into harmless carbon dioxide and water for direct emission without high-temperature incineration. This effectively avoids the generation of toxic and harmful gases and dust, significantly reducing environmental pollution to the atmosphere, soil, and water bodies, while also reducing the health hazards to workers during the disposal process, thus significantly improving the safety and environmental friendliness of the disposal. Secondly, this method realizes the disposal concept of "using waste to treat waste," directly using the seized prohibited hydrogen peroxide as an oxidant to treat seized drugs, eliminating the need to purchase additional oxidants. This solves the disposal problems of two types of prohibited items and saves the costs of fuel and environmental purification equipment required for traditional incineration, significantly reducing the overall cost of drug disposal.

[0006] However, the technology for treating drugs using seized hydrogen peroxide has not yet formed a mature industrial application scheme. Existing oxidation treatment technologies are mostly designed for single types of drugs, and suffer from problems such as complex reaction condition control, incomplete drug degradation, and treatment efficiency being greatly affected by fluctuations in water quality (or drug form). Drug disposal work urgently needs to transform towards green, low-cost, and efficient directions. Developing a homogeneous oxidation and harmless treatment technology for drugs based on seized hydrogen peroxide, breaking through existing technological bottlenecks, can not only make up for many shortcomings of traditional incineration methods and achieve coordinated and environmentally friendly disposal of contraband, but also has important practical significance and application value for promoting the quality and efficiency of drug control work and practicing the concept of green development. Summary of the Invention

[0007] The purpose of this invention is to provide a method for harmlessly treating seized drugs using seized chemicals. By activating seized hydrogen peroxide with ultraviolet light to generate hydroxyl radicals, the psychoactive substances in the drugs are completely mineralized at room temperature and pressure without the need for high-temperature incineration. The reaction process is closed and controllable, with no toxic fumes or dust escaping. At the same time, ultraviolet light activation can reduce the reactivity threshold of the oxidant, reduce the risk of oxidant leakage, significantly improve the safety of the disposal process, and protect the occupational health of workers.

[0008] To achieve the above-mentioned technical objectives and effects, the present invention is implemented through the following technical solution: A method for harmlessly disposing of seized drugs using seized chemicals includes the following steps: The seized peroxide-based oxidants were pretreated to prepare an active oxidant solution; The seized drugs to be destroyed are pre-treated to ensure that they are evenly dispersed in a homogeneous system; The pretreated seized drugs were mixed with the active oxidant solution to construct a homogeneous reaction system; Under ultraviolet light irradiation, the reaction system is subjected to an oxidative degradation reaction in a closed reactor under normal temperature and pressure conditions until the psychoactive substances in the drugs are fully degraded. The wavelength of the ultraviolet light field is capable of exciting the peroxide-based oxidant to generate hydroxyl radicals.

[0009] Furthermore, the seized drugs included methamphetamine and / or caffeine as psychoactive substances.

[0010] Furthermore, the peroxide oxidant is captured hydrogen peroxide with an original mass fraction of 27%-50%; the pretreatment is dilution, and the concentration of hydrogen peroxide after dilution is 2-30 mM.

[0011] Furthermore, the ultraviolet light field is provided by a single-wavelength ultraviolet light source, the wavelength of which is selected from at least one of 185 nm, 222 nm, or 254 nm.

[0012] Furthermore, the pretreatment of the seized drugs includes mechanical crushing, grinding, or cutting to reduce the particle size to a scale that can be effectively dissolved or suspended in an aqueous phase.

[0013] Furthermore, the step of constructing the liquid-phase reaction system also includes promoting full contact between the drug and the oxidant by stirring, oscillation, or ultrasound, with a contact time of 30-60 minutes.

[0014] Furthermore, the ambient temperature and pressure conditions refer to a reaction temperature of 15-40℃ and a reaction pressure of 0.08-0.12MPa.

[0015] Furthermore, the term "fully degraded" refers to the reduction of the concentration of psychoactive substances in the drug to below the detection limit of high performance liquid chromatography, or a degradation rate of 99% or higher, without the need for additional pH adjustment of the reaction system.

[0016] Furthermore, the seized hydrogen peroxide is replaced with seized potassium permanganate, with a concentration of 2-30 mM; the wavelength of the ultraviolet light field is capable of exciting hydrogen peroxide to produce highly reactive species.

[0017] Furthermore, the seized drugs were methamphetamine pills.

[0018] The beneficial effects of this invention are: This invention achieves the complete mineralization and degradation of psychoactive substances in seized drugs, solving the technical problems of incomplete incineration and the generation of secondary pollutants. This invention uses 222 nm or 254 nm ultraviolet light to excite seized hydrogen peroxide, utilizing photon energy to break the O2O bonds in the hydrogen peroxide molecule, generating hydroxyl radicals in situ. These radicals non-selectively attack the benzene ring structure of methamphetamine and the purine ring of caffeine, causing the psychoactive substances to undergo ring-opening and bond breaking through reaction pathways such as hydroxyl addition, hydrogen extraction, and electron transfer, ultimately converting them into carbon dioxide and water. Example 1 shows that under 254 nm ultraviolet light irradiation for 180 minutes, the degradation rate of both methamphetamine and caffeine reached over 99.9%, the reaction solution was clear and residue-free, and the concentration of the target substances was below the detection limit of high-performance liquid chromatography. Example 2, a quenching experiment, confirms that the degradation reaction was significantly inhibited after the addition of methanol, proving that hydroxyl radicals are the key active species dominating the degradation process. Example 3 further demonstrates that under 222nm light irradiation, 4 mM hydrogen peroxide can completely degrade the two target substances in a 5 mg / L methamphetamine solution within 6 minutes, with a degradation rate of 100%, verifying the rapid and thorough removal capability of this oxidation system for low-concentration pollutants.

[0019] This invention significantly reduces disposal costs and improves processing efficiency through a waste-to-waste technology approach. It directly uses 27% to 50% of seized hydrogen peroxide as the oxidant source, requiring only dilution to 2 to 30 mM before reaction. No additional chemical reagents are needed, nor is purification of seized chemicals required, solving the problem of separate disposal of seized hydrogen peroxide. The introduction of ultraviolet light reduces the required amount of hydrogen peroxide; in Example 3, 4 mM hydrogen peroxide is sufficient for complete degradation, significantly improving reagent utilization. The reaction is carried out under normal temperature and pressure conditions, eliminating the need for high-temperature equipment, fuel consumption, and investment in exhaust gas purification systems required for incineration. In terms of processing time, the 20 mM hydrogen peroxide system in Example 1 completes the degradation of a 4 g / L methamphetamine solution within 180 minutes. Even including 60 minutes of pre-stirring, the total processing time is still much shorter than the entire process involving material transfer, high-temperature incineration, and residue post-treatment in incineration.

[0020] This invention eliminates the inherent occupational health hazards and environmental pollution risks of incineration methods through mild reaction conditions and a closed system design. The reaction is carried out at ambient temperature and pressure of 15 to 40°C and 0.08 to 0.12 MPa. The driving force of the reaction comes from ultraviolet photon energy rather than thermal energy, fundamentally avoiding the generation of toxic gases such as dioxins, polycyclic aromatic hydrocarbons, and nitrogen oxides during high-temperature pyrolysis. The reactor adopts a fully sealed design, effectively confining volatile organic compounds and hydrogen peroxide vapor within the liquid phase system, preventing their escape into the working environment. Hydroxyl radicals exist only within the reactor and have an extremely short half-life, rapidly quenching after the reaction, leaving no residual toxicity. In Example 1, the degradation rate of the control group without light exposure was less than 2%, proving that photolysis alone is weak, and the degradation reaction depends entirely on a controllable hydroxyl radical oxidation pathway, without generating unknown toxic intermediate products due to side reactions. Example 5 verified that the degradation rate of the target substance reached over 99.5% after reacting for 180 minutes at 15℃ and 40℃, which was comparable to the degradation effect at 25℃. This shows that the method of the present invention can operate stably in a wide temperature range of 15-40℃ without the need for additional temperature control equipment.

[0021] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1This is a flowchart illustrating the overall process flow of the present invention for treating captured methamphetamine using a homogeneous system of ultraviolet light-activated hydrogen peroxide.

[0024] Figure 2 This image shows the homogeneous degradation effect of different concentrations of hydrogen peroxide on caffeine in methamphetamine under 254 nm light irradiation conditions, according to the present invention.

[0025] Figure 3 This image shows the homogeneous degradation effect of hydrogen peroxide at different concentrations on methamphetamine in methamphetamine pills under 254 nm light irradiation conditions, according to the present invention.

[0026] Figure 4 This diagram illustrates the quenching effect of methanol on caffeine degradation in a hydrogen peroxide system under 222 nm illumination, according to the present invention.

[0027] Figure 5 This is a diagram showing the quenching effect of adding methanol to a hydrogen peroxide system on the degradation of methamphetamine under 222 nm light irradiation conditions, according to the present invention.

[0028] Figure 6 This diagram illustrates the quenching effect of methanol on caffeine degradation in a hydrogen peroxide system under 254 nm illumination, according to the present invention.

[0029] Figure 7 This diagram illustrates the quenching effect of methanol on the degradation of methamphetamine in a hydrogen peroxide system under 254 nm illumination, according to the present invention.

[0030] Figure 8 This is a graph showing the homogeneous degradation kinetics of caffeine in low-concentration methamphetamine under 222 nm light irradiation conditions using hydrogen peroxide of different concentrations.

[0031] Figure 9 This is a kinetic curve of homogeneous degradation of methamphetamine in low-concentration methamphetamine pills by different concentrations of hydrogen peroxide under 222 nm light irradiation conditions.

[0032] Figure 10 This is a graph showing the homogeneous degradation kinetics of caffeine in low-concentration methamphetamine under 254 nm light irradiation conditions using hydrogen peroxide of different concentrations.

[0033] Figure 11 This is a kinetic curve of homogeneous degradation of methamphetamine in low-concentration methamphetamine pills by different concentrations of hydrogen peroxide under 254 nm light irradiation conditions.

[0034] Figure 12 This is a comparison chart showing the final degradation rate of caffeine in low-concentration methamphetamine under 222 nm light irradiation conditions using different concentrations of hydrogen peroxide.

[0035] Figure 13This is a comparison chart showing the final degradation rate of methamphetamine in low-concentration methamphetamine pills by different concentrations of hydrogen peroxide under 222 nm light irradiation conditions, according to the present invention.

[0036] Figure 14 This is a comparison chart showing the final degradation rate of caffeine in low-concentration methamphetamine under 254 nm light irradiation conditions using different concentrations of hydrogen peroxide.

[0037] Figure 15 This is a comparison of the final degradation rates of methamphetamine in low-concentration methamphetamine pills by different concentrations of hydrogen peroxide under 254 nm light irradiation conditions, according to the present invention. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. 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.

[0039] Example 1 A batch of seized hydrogen peroxide with a mass fraction of approximately 35% was used as the oxidant source. It was diluted with deionized water to prepare active oxidant solutions with concentrations of 10 mM, 20 mM, and 30 mM, respectively, for later use. At the same time, a batch of seized methamphetamine tablets was mechanically pulverized and ground to make them into a fine powder that could be uniformly dispersed in the liquid phase.

[0040] To construct the liquid-phase reaction system, three portions of pretreated methamphetamine powder, each weighing 4.0 g, were accurately weighed and placed in three identical closed photoreactors. 1 L of pre-prepared diluted hydrogen peroxide solutions with concentrations of 10 mM, 20 mM, and 30 mM were slowly added to each of the three reactors. A control reactor was also set up, containing 4.0 g of methamphetamine powder and 1 L of deionized water as a blank control without oxidants. The stirring device was started and stirred at 500 r / min at room temperature (25 ± 2 °C) for 45 minutes to ensure that the psychoactive substances in the methamphetamine were fully dissolved or uniformly suspended in the liquid phase.

[0041] Subsequently, an external energy field was activated, and all four reactors were placed in a photochemical reaction apparatus equipped with 254 nm low-pressure mercury lamps. The distance between the lamps and the liquid surface was adjusted to 6 cm, and the light source power was 20 W. After sealing the reactors, the ultraviolet light source was turned on, and the oxidative degradation reaction was carried out under ambient temperature and pressure conditions of approximately 25 ± 2 °C and 0.1 MPa for a total reaction time of 180 minutes. During the reaction, the stirring rate was maintained at 400 r / min, and 2 mL samples were taken from each reactor at 0, 20, 40, 60, 80, 100, 120, 140, 160, and 180 minutes after the start of the reaction, and stored in brown sample bottles protected from light.

[0042] The concentrations of methamphetamine and caffeine in the samples were determined by high-performance liquid chromatography (HPLC). The chromatographic conditions were as follows: C18 reversed-phase column (4.6 mm × 250 mm, 5 μm); mobile phase: a mixture of methanol and 0.1% formic acid aqueous solution (volume ratio 60:40); flow rate: 1.0 mL / min; column temperature: 40℃; injection volume: 20 μL; detection wavelength: 210 nm. The concentrations and degradation rates of the target pollutants at each time point were calculated based on the standard curve.

[0043] Experimental results are as follows Figure 2 and Figure 3 As shown. From Figure 2 It can be seen that the homogeneous degradation of caffeine under different concentrations of hydrogen peroxide shows significant differences. In the control group without light, caffeine hardly decomposes, while under 254 nm light conditions, higher concentrations of hydrogen peroxide can catalyze the oxidation and degradation of caffeine in a shorter time and at a higher degradation rate. Figure 3 The degradation of methamphetamine follows the same pattern as that of caffeine, indicating that ultraviolet light is a necessary condition for initiating the reaction, and within a certain range, the higher the concentration of hydrogen peroxide, the faster the degradation rate and the higher the final degradation rate.

[0044] Specifically, in this embodiment, after 180 minutes of reaction, the degradation rates of methamphetamine and caffeine in the 10 mM hydrogen peroxide system reached 99.1% and 99.4%, respectively, with trace amounts of precipitation in the solution after the reaction. In the 20 mM hydrogen peroxide system, the degradation rates of both substances reached over 99.9%, below the detection limit of high-performance liquid chromatography (HPLC), and the solution after the reaction was clear with no obvious residue. The degradation effect of the 30 mM hydrogen peroxide system was similar to that of the 20 mM system. In contrast, the degradation rate of both substances in the blank control group without oxidant was less than 2% under ultraviolet light irradiation, indicating that the photolysis effect of ultraviolet light alone is very limited. This verifies that in a hydrogen peroxide system with a concentration of 20 mM or higher, combined with 254 nm ultraviolet light irradiation, the psychoactive substances in methamphetamine can be fully degraded within 180 minutes.

[0045] Example 2 The underlying reaction mechanism of UV-activated hydrogen peroxide degradation of methamphetamine was investigated using free radical quenching experiments to identify the active species playing a key role in the reaction. A low-concentration methamphetamine solution of 5 mg / L, the same as in Example 1, was used as the target compound. Two reaction systems were prepared: a control group containing only 4 mM hydrogen peroxide, and an experimental group containing excess methanol in addition to the 4 mM hydrogen peroxide solution. Methanol is a typical hydroxyl radical quencher.

[0046] The two reaction systems were subjected to degradation experiments under 222 nm and 254 nm ultraviolet light, respectively. The lamp-liquid distance, power, and temperature conditions were kept consistent with those in Example 1. High-performance liquid chromatography (HPLC) was used to monitor the concentration changes of methamphetamine and caffeine. The experimental results are as follows: Figure 4-7 As shown.

[0047] from Figure 4 As can be seen, under 222 nm light, caffeine is rapidly degraded in the system containing only 4 mM hydrogen peroxide; however, when methanol is added, the ability of hydrogen peroxide to decompose caffeine decreases significantly, and the degradation curve becomes flatter. Figure 5 The quenching experiment of methamphetamine under 222 nm light illumination showed results that were completely consistent with those of caffeine, indicating that the addition of methanol significantly inhibited the degradation of methamphetamine. Figure 6 and Figure 7 This demonstrates that methanol exhibits the same significant inhibitory effect on the degradation of caffeine and methamphetamine under 254 nm illumination.

[0048] The experimental results consistently demonstrate that the degradation process of hydrogen peroxide, whether activated by 222 nm or 254 nm ultraviolet light, is highly dependent on the hydroxyl radicals generated in the system. When methanol is added as a quencher to capture the hydroxyl radicals, the degradation reaction essentially stops, directly proving that hydroxyl radicals are the key reactive species in this oxidation system, and that the role of ultraviolet light is to efficiently excite hydrogen peroxide to generate hydroxyl radicals. This embodiment provides solid theoretical support for the technical solution of this invention from a mechanistic perspective.

[0049] Example 3 To precisely investigate the synergistic degradation kinetics of 222 nm and 254 nm ultraviolet light with different concentrations of hydrogen peroxide, this embodiment uses a lower concentration of methamphetamine samples to further optimize process parameters. Pre-treated methamphetamine powder was used to precisely prepare a series of 5 mg / L methamphetamine aqueous solutions. Equal portions of these solutions were then mixed with diluted hydrogen peroxide to achieve final concentrations of 2 mM, 4 mM, and 6 mM, respectively, to construct liquid-phase reaction systems. A control group without hydrogen peroxide was also included.

[0050] The above reaction system was placed in photoreactors equipped with 222 nm and 254 nm UV lamps, respectively, with a lamp-liquid distance of 6 cm and a light source power of 20 W. After sealing the reactors, the degradation reaction was carried out under stirring conditions of 25±1℃ and 400 r / min for a total duration of 10 minutes. Samples were taken every 1 minute, and the concentration changes of methamphetamine and caffeine were detected using the same high-performance liquid chromatography conditions as in Example 1.

[0051] like Figure 8-15 As shown, Figure 8 and Figure 9 The degradation curves of caffeine and methamphetamine under 222 nm illumination with 2 mM, 4 mM, and 6 mM hydrogen peroxide are shown. As can be seen from the figures, under 222 nm illumination, both methamphetamine and caffeine in the 4 mM and 6 mM hydrogen peroxide systems were degraded to below the detection limit within 6 minutes, achieving a degradation rate of 100%. For details, please refer to [link to relevant documentation]. Figure 12 and Figure 13 The degradation rate of the 2 mM hydrogen peroxide system was close to 99% after 10 minutes. Figure 10 and Figure 11 The degradation under 254 nm light showed a similar trend to that under 222 nm light, also exhibiting concentration dependence. Furthermore, under 254 nm light, all three concentrations of hydrogen peroxide could completely degrade both substances within 10 minutes. Figure 14 and Figure 15 As shown.

[0052] All figures include data from a control group without illumination, clearly showing that caffeine and methamphetamine hardly decompose under light-free conditions regardless of hydrogen peroxide concentration, further emphasizing the indispensable role of ultraviolet light as a driving force for the reaction. This example precisely verifies the effectiveness of 222 nm and 254 nm ultraviolet light, and through comparative experiments at different concentrations, provides detailed kinetic data support for selecting process parameters in scenarios involving the treatment of low-concentration, highly toxic waste liquids.

[0053] Example 4 The feasibility of using other seized peroxide-based oxidants for degradation was verified. Seized potassium permanganate solid was dissolved in deionized water to prepare a 5 mM oxidant solution. 0.5 g of pre-treated methamphetamine powder was placed in a closed reactor, and 100 mL of the above potassium permanganate solution was added. The mixture was stirred to dissolve and disperse the powder, thus constructing the reaction system.

[0054] The reactor was placed in a 254 nm ultraviolet light reactor with a lamp-liquid distance of 7 cm and a light source power of 20 W. The reaction was stirred at room temperature (25°C) for 60 minutes. Samples were taken at 0, 15, 30, 45, and 60 minutes of reaction. After appropriate pretreatment, the concentrations of methamphetamine and caffeine were determined by high-performance liquid chromatography (HPLC). A control group was also included, with only potassium permanganate added and no light exposure.

[0055] Experiments showed that under 254 nm ultraviolet light irradiation, the purplish-red potassium permanganate solution gradually faded, indicating that it was activated by light energy to produce highly active species. After 60 minutes of reaction, the degradation rates of methamphetamine and caffeine both reached over 98.5%. In contrast, in the control group without light irradiation, the oxidative degradation efficiency of potassium permanganate for methamphetamine was extremely low, with a degradation rate of less than 10% after 60 minutes. This example demonstrates that seized potassium permanganate can also be activated under ultraviolet light, enabling efficient degradation of seized drugs and expanding the scope of application of this invention.

[0056] Example 5 The effects of contact time and reaction temperature range on degradation efficiency were verified. Using the same methamphetamine powder and 20 mM diluted hydrogen peroxide solution as in Example 1, a series of experiments were conducted under 254 nm, 20 W UV light irradiation.

[0057] First, the effect of contact time was investigated. Two sets of experiments were set up, with stirring contact times of 15 minutes and 60 minutes before turning on ultraviolet light, respectively. Then, the final degradation rate was measured after 180 minutes of light exposure under the same conditions. The results showed that the degradation rate of the system with pre-stirring for 15 minutes was 99.2% after the reaction, while the degradation rate of the system with pre-stirring for 60 minutes was close to 99.9%. This indicates that ensuring effective dispersion of the drug through sufficient contact is a favorable guarantee for achieving sufficient degradation.

[0058] Secondly, the effect of reaction temperature was investigated. The reaction system was subjected to photocatalytic degradation reactions in constant temperature environments of 15℃ and 40℃, respectively. The results showed that after reacting for 180 minutes at both 15℃ and 40℃, the degradation rate of the target substance could reach over 99.5%, with no significant difference compared to the effect at 25℃. This demonstrates that the method of the present invention has good adaptability over a wide temperature range and can meet the room temperature treatment needs of different regions and seasons.

[0059] In summary, this invention proposes a method for the harmless treatment of seized drugs using seized chemicals. The method involves diluting seized peroxide-based oxidants and mixing them with pre-treated seized drugs to construct a liquid-phase reaction system. This system is then subjected to oxidative degradation in a closed reactor at room temperature and pressure under ultraviolet light irradiation until the psychoactive substances in the drugs are fully degraded. The ultraviolet light wavelength is selected from 185nm, 222nm, or 254nm, capable of stimulating the peroxide-based oxidants to generate hydroxyl radicals; the hydrogen peroxide concentration is 2-30mM. This invention directly utilizes seized hydrogen peroxide as an oxidant, using ultraviolet light to activate and generate hydroxyl radicals that non-selectively attack psychoactive substances such as methamphetamine and caffeine in the drugs, completely mineralizing them into carbon dioxide and water, achieving a degradation rate of over 99%. This method achieves waste-to-waste treatment, avoiding the drawbacks of incineration methods that produce toxic gases and dust. It can operate efficiently at room temperature and pressure, significantly reducing disposal costs and environmental risks.

[0060] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A method for harmlessly disposing of seized drugs using seized chemicals, characterized in that, Includes the following steps: The seized peroxide-based oxidants were pretreated to prepare an active oxidant solution; The seized drugs to be destroyed are pre-treated to ensure that they are evenly dispersed in a homogeneous reaction system; The pretreated seized drugs were mixed with the active oxidant solution to construct a homogeneous reaction system; Under ultraviolet light irradiation, the reaction system is subjected to an oxidative degradation reaction in a closed reactor under normal temperature and pressure conditions until the psychoactive substances in the drugs are fully degraded. The wavelength of the ultraviolet light is capable of exciting the peroxide-based oxidant to generate hydroxyl radicals.

2. The method as described in claim 1, characterized in that, The seized drugs included methamphetamine and / or caffeine as psychoactive substances.

3. The method as described in claim 1, characterized in that, The peroxide oxidant is the captured hydrogen peroxide, with an original mass fraction of 3%-60%; the pretreatment is dilution, and the concentration of hydrogen peroxide after dilution is 2-30 mM.

4. The method as described in claim 1, characterized in that, The ultraviolet light field is provided by a single-wavelength ultraviolet light source, the wavelength of which is selected from at least one of 185 nm, 222 nm or 254 nm.

5. The method as described in claim 1, characterized in that, The pretreatment of the seized drugs includes mechanical crushing, grinding, or cutting to reduce the particle size to a scale that can be effectively dissolved or suspended in an aqueous phase.

6. The method as described in claim 1, characterized in that, The step of constructing the liquid-phase reaction system also includes promoting full contact between the drug and the oxidant by stirring, oscillation or ultrasound, with a contact time of 30-60 minutes.

7. The method as described in claim 1, characterized in that, The ambient temperature and pressure conditions refer to a reaction temperature of 15-40℃ and a reaction pressure of 0.08-0.12 MPa.

8. The method according to any one of claims 1-7, characterized in that, The seized drugs were methamphetamine pills.

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