CN111592089A - Method for removing medicine in urine by activating peroxyacetic acid with human excrement biochar - Google Patents
Method for removing medicine in urine by activating peroxyacetic acid with human excrement biochar Download PDFInfo
- Publication number
- CN111592089A CN111592089A CN202010449109.9A CN202010449109A CN111592089A CN 111592089 A CN111592089 A CN 111592089A CN 202010449109 A CN202010449109 A CN 202010449109A CN 111592089 A CN111592089 A CN 111592089A
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- Prior art keywords
- urine
- excrement
- biochar
- peroxyacetic acid
- peracetic acid
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/722—Oxidation by peroxides
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/34—Organic compounds containing oxygen
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/38—Organic compounds containing nitrogen
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/02—Specific form of oxidant
- C02F2305/023—Reactive oxygen species, singlet oxygen, OH radical
Abstract
The invention discloses a method for removing drugs in urine by activating peroxyacetic acid with human excrement-made charcoal, and belongs to the technical field of wastewater treatment. The method comprises the following steps: firstly, placing air-dried excrement in a crucible, pyrolyzing the excrement for 2-8 hours at 300-800 ℃ in a protective gas atmosphere, and cooling, washing, drying and grinding the excrement to obtain biochar; and then refrigerating the urine at 0-10 ℃ for 24-48 h, adding peroxyacetic acid into the urine, adjusting the pH value of the solution to 7, adding the prepared biochar, and stirring at room temperature for reaction, wherein the adding amount of the peroxyacetic acid is 0.01-0.1 g/L, and the adding mass ratio of the biochar to the peroxyacetic acid is (2-20): 1. The method starts from the source of the excrement, selects the biochar prepared by pyrolyzing the human excrement as an activator to activate peracetic acid for degrading and removing the medicines in the urine, not only has higher medicine removal rate, but also can realize the closed-loop utilization of the excrement.
Description
Technical Field
The invention relates to a method for removing drugs in urine by activating peroxyacetic acid with human excrement-made charcoal, belonging to the technical field of wastewater treatment.
Background
With the rapid growth of the population and the constant development of the pharmaceutical industry, the number of antibiotics used worldwide has increased year by year. The excessive use of antibiotics causes a large increase in resistant bacteria and resistant genes in the environment, which has an extremely adverse effect on the ecosystem. The majority of currently used antibiotics are water soluble, with about 90% of the antibiotics being excreted from the body along with the animal's urine. As a persistent organic pollutant, antibiotics are often difficult to remove using traditional biological treatment methods. The advanced oxidation technology is a new technology suitable for treating the organic pollutants difficult to degrade, and has the characteristics of strong oxidation capability, thorough degradation of the pollutants, high reaction efficiency and easy control. Peracetic acid is a peroxide of acetic acid, has high oxidation efficiency and sterilization efficiency, has been applied to many fields such as food, textile and the like, and is gradually becoming one of hot spots in the field of sewage treatment.
The activation mode of the peroxyacetic acid includes metal ion or metal oxide activation, ultraviolet activation, and the like. The ultraviolet activation energy consumption is high, the metal ion activation has a good degradation effect on pollutants, but the secondary pollution is easy to generate, and as a homogeneous catalyst, the metal ion is not easy to recover, the service life is short, the utilization rate is low, and therefore the use cost is greatly improved. Compared with ultraviolet activation and metal compounds, the carbon material has unique performance in the field of catalysis, and is also applied to the activation of peroxyacetic acid, for example, the invention patent with the publication number of CN108423793A discloses a method for degrading pollutants in wastewater by activating peroxyacetic acid with carbon nano tubes, although the method can realize the efficient degradation of pollutants in wastewater, the method mainly aims at the wastewater containing azo dyes, and the carbon nano tubes are expensive and high in cost.
The vast rural areas in China often lack perfect drainage systems, meanwhile, local rural areas have certain resource utilization requirements on human excrement, and if the medicine in urine can be efficiently treated from the excrement generation source, the method has important significance on the treatment and resource utilization of the excrement in the rural areas.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a method for removing drugs in urine by activating peroxyacetic acid through human excrement biochar, which starts from an excrement source, selects biochar prepared by human excrement pyrolysis as an activator to activate peroxyacetic acid for degrading and removing the drugs in urine, has higher drug removal rate, and can realize closed-loop utilization of excrement.
In order to achieve the technical purpose, the technical scheme of the invention is as follows:
a method for removing drugs in urine by using human excrement biochar to activate peracetic acid comprises the following steps:
(1) preparing biochar: putting the air-dried excrement into a crucible, pyrolyzing the excrement for 2-8 hours at 300-800 ℃ in a protective gas atmosphere, and cooling, washing, drying and grinding the excrement to obtain biochar;
(2) removal of drugs in urine: refrigerating urine at 0-10 ℃ for 24-48 h, adding peracetic acid into the urine, adjusting the pH of the solution to 7, adding the biochar prepared in the step (1), stirring at room temperature for reaction, wherein the adding amount of the peracetic acid is 0.01-0.1 g/L, and the adding mass ratio of the biochar to the peracetic acid is (2-20): 1.
Preferably, the feces are collected through a feces opening of the source separation toilet and the urine is collected through a urine opening or a urinal of the source separation toilet.
Preferably, the moisture content of the faeces is below 85%.
Preferably, the shielding gas is nitrogen or argon.
Preferably, the washing specifically means washing with deionized water to neutrality.
Preferably, the drying temperature is 100-200 ℃, and the drying time is 12-48 h.
Preferably, the stirring speed is 500-1000 rpm.
Preferably, the drug includes, but is not limited to, oxcarbazepine, carbamazepine, antipyrine, aminopyrine.
From the above description, it can be seen that the present invention has the following advantages:
(1) according to the invention, from the source of excrement, biochar prepared by pyrolyzing human excrement is selected as an activating agent, and the purpose of generating hydroxyl radicals with extremely strong oxidizing capability is achieved through the activation of functional groups on the surface of the biochar, so that the oxidizing property of peroxyacetic acid can be enhanced, the removal efficiency of the medicine in urine is improved, the solid waste of human excrement can be effectively utilized, the treatment and consumption cost is reduced, and the closed-loop utilization of excrement is realized.
(2) The method has the advantages of simple operation, mild reaction conditions, high pollutant degradation efficiency, low application cost and easy industrial application.
Detailed Description
The features of the invention will be further elucidated by the following examples, without limiting the claims of the invention in any way.
Example 1
A method for removing drugs in urine by using human excrement biochar to activate peracetic acid comprises the following steps:
(1) preparing biochar: placing 5g of excrement with water content of 82% (obtained by collecting and air-drying excrement of a water source-free separation toilet stool port, the same below) in a crucible, covering, pyrolyzing for 4h at 500 ℃ in a tubular furnace under nitrogen atmosphere, cooling, washing to neutrality by using deionized water, drying for 48h at 120 ℃, and grinding to obtain biochar;
(2) removal of drugs in urine: and (2) refrigerating 100mL of urine collected through a urine port of a water-free source separation toilet at 4 ℃ for 24h, adding 0.2mL of peroxyacetic acid solution with the mass concentration of 10g/L into the urine, quickly adjusting the pH of the solution to 7, adding 25mg of the biochar prepared in the step (1), and stirring at room temperature for 180min at the stirring speed of 600 rpm. Adopting high performance liquid chromatography to measure the concentrations of oxcarbazepine, carbamazepine, antipyrine and aminopyrine in urine after the initial reaction and the end of the reaction, and measuring the total organic carbon concentration (TOC) of the solution at the initial reaction and the end of the reaction; the calculation shows that the removal rate of the total amount of antibiotics is 90 percent, and the removal rate of TOC is 70 percent.
Example 2
A method for removing drugs in urine by using human excrement biochar to activate peracetic acid comprises the following steps:
(1) preparing biochar: placing 5g of excrement with the water content of 80% in a crucible, covering, pyrolyzing for 7h at 400 ℃ in a tubular furnace under the argon atmosphere, cooling, washing to neutrality by using deionized water, drying for 12h at 200 ℃, and grinding to obtain biochar;
(2) removal of drugs in urine: and (2) refrigerating 100mL of urine collected through a urine port of a water-free source separation toilet at 4 ℃ for 24h, adding 0.2mL of peroxyacetic acid solution with the mass concentration of 10g/L into the urine, quickly adjusting the pH of the solution to 7, adding 20mg of the biochar prepared in the step (1), and stirring at room temperature for 180min at the stirring speed of 800 rpm. Adopting high performance liquid chromatography to measure the concentrations of oxcarbazepine, carbamazepine, antipyrine and aminopyrine in urine after the initial reaction and the end of the reaction, and measuring the total organic carbon concentration (TOC) of the solution at the initial reaction and the end of the reaction; the calculation shows that the removal rate of the total amount of antibiotics is 85 percent, and the removal rate of TOC is 67 percent.
Example 3
A method for removing drugs in urine by using human excrement biochar to activate peracetic acid comprises the following steps:
(1) preparing biochar: placing 5g of excrement with the water content of 83% in a crucible, covering, pyrolyzing for 2h at 800 ℃ in a tubular furnace under the nitrogen atmosphere, cooling, washing to neutrality by using deionized water, drying for 24h at 150 ℃, and grinding to obtain biochar;
(2) removal of drugs in urine: refrigerating 100mL of urine collected through a urine port of a water-free source separation toilet at 4 ℃ for 24h, adding 0.2mL of peroxyacetic acid solution with the mass concentration of 10g/L into the urine, quickly adjusting the pH of the solution to 7, adding 30mg of the biochar prepared in the step (1), and stirring at room temperature for 180min at the stirring speed of 1000 rpm. Adopting high performance liquid chromatography to measure the concentrations of oxcarbazepine, carbamazepine, antipyrine and aminopyrine in urine after the initial reaction and the end of the reaction, and measuring the total organic carbon concentration (TOC) of the solution at the initial reaction and the end of the reaction; the calculation shows that the removal rate of the total amount of antibiotics is 94 percent, and the removal rate of TOC is 75 percent.
Comparative example 1
(1) The method disclosed in patent application example 1 with publication number CN108298668A is adopted to prepare phenol modified straw activated carbon;
(2) and (2) refrigerating 100mL of urine at 4 ℃ for 24h, adding 0.2mL of peroxyacetic acid solution with the mass concentration of 10g/L into the urine, quickly adjusting the pH of the solution to 7, adding 20mg of the phenol modified straw activated carbon prepared in the step (1), and stirring at room temperature for reaction for 180min at the stirring speed of 600 rpm. Adopting high performance liquid chromatography to measure the concentrations of oxcarbazepine, carbamazepine, antipyrine and aminopyrine in urine after the initial reaction and the end of the reaction, and measuring the total organic carbon concentration (TOC) of the solution at the initial reaction and the end of the reaction; the calculation shows that the removal rate of the total amount of antibiotics is 75 percent, and the removal rate of TOC is 52 percent.
Comparative example 2
Refrigerating 100mL of urine at 4 ℃ for 24h, adding 0.2mL of peroxyacetic acid solution with the mass concentration of 10g/L into the urine, quickly adjusting the pH of the solution to 7, adding 20mg of carbon nanotubes, and stirring at room temperature for reaction for 180min at the stirring speed of 600 rpm. Adopting high performance liquid chromatography to measure the concentrations of oxcarbazepine, carbamazepine, antipyrine and aminopyrine in urine after the initial reaction and the end of the reaction, and measuring the total organic carbon concentration (TOC) of the solution at the initial reaction and the end of the reaction; the calculation shows that the removal rate of the total amount of antibiotics is 82 percent, and the removal rate of TOC is 61 percent.
It should be understood that the detailed description of the invention is merely illustrative of the invention and is not intended to limit the invention to the specific embodiments described. It will be appreciated by those skilled in the art that the present invention may be modified or substituted equally as well to achieve the same technical result; as long as the use requirements are met, the method is within the protection scope of the invention.
Claims (8)
1. A method for removing drugs in urine by activating peracetic acid with human excrement biochar is characterized by comprising the following steps:
(1) preparing biochar: putting the air-dried excrement into a crucible, pyrolyzing the excrement for 2-8 hours at 300-800 ℃ in a protective gas atmosphere, and cooling, washing, drying and grinding the excrement to obtain biochar;
(2) removal of drugs in urine: refrigerating urine at 0-10 ℃ for 24-48 h, adding peracetic acid into the urine, adjusting the pH of the solution to 7, adding the biochar prepared in the step (1), stirring at room temperature for reaction, wherein the adding amount of the peracetic acid is 0.01-0.1 g/L, and the adding mass ratio of the biochar to the peracetic acid is (2-20): 1.
2. The method of claim 1, wherein the stool is collected through a stool port of the source separation toilet and the urine is collected through a urine port of the source separation toilet or a urinal.
3. The method of claim 1, wherein the moisture content of the stool is less than 85%.
4. The method of claim 1, wherein the shielding gas is nitrogen or argon.
5. The method according to claim 1, wherein the washing is specifically deionized water to neutrality.
6. The method according to claim 1, wherein the drying temperature is 100 to 200 ℃ and the drying time is 12 to 48 hours.
7. The method of claim 1, wherein the stirring rate is 500 to 1000 rpm.
8. The method of claim 1, wherein the drug includes, but is not limited to, oxcarbazepine, carbamazepine, antipyrine, and aminopyrine.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113209970A (en) * | 2021-05-13 | 2021-08-06 | 哈尔滨工业大学 | Preparation method and application of carbon-based catalyst prepared from excess sludge |
| CN114249411A (en) * | 2021-12-13 | 2022-03-29 | 东华大学 | Method for advanced treatment of organic micropollutants in landfill leachate by coupling biochar with peroxyacetic acid |
| CN114920345A (en) * | 2022-05-11 | 2022-08-19 | 同济大学 | Peroxyacetic acid reinforced disinfection method |
| CN115180703A (en) * | 2022-05-30 | 2022-10-14 | 同济大学 | Excrement purification and disinfection device and disinfection method based on nano-catalysis advanced oxidation |
| CN115838164A (en) * | 2022-12-14 | 2023-03-24 | 上海电力大学 | Biochar, preparation method thereof and method for degrading sulfonamide antibiotics by using biochar to activate peracetic acid |
| CN116002842A (en) * | 2022-12-22 | 2023-04-25 | 昆明理工大学 | Method for degrading carbamazepine by activating peroxyacetic acid with carbon nano tube supported catalyst |
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| CN113209970A (en) * | 2021-05-13 | 2021-08-06 | 哈尔滨工业大学 | Preparation method and application of carbon-based catalyst prepared from excess sludge |
| CN113209970B (en) * | 2021-05-13 | 2023-05-05 | 哈尔滨工业大学 | Preparation method and application of carbon-based catalyst prepared from excess sludge |
| CN114249411A (en) * | 2021-12-13 | 2022-03-29 | 东华大学 | Method for advanced treatment of organic micropollutants in landfill leachate by coupling biochar with peroxyacetic acid |
| CN114249411B (en) * | 2021-12-13 | 2024-03-01 | 东华大学 | Method for advanced treatment of organic micro-pollutants in landfill leachate by coupling biochar with peroxyacetic acid |
| CN114920345A (en) * | 2022-05-11 | 2022-08-19 | 同济大学 | Peroxyacetic acid reinforced disinfection method |
| CN115180703A (en) * | 2022-05-30 | 2022-10-14 | 同济大学 | Excrement purification and disinfection device and disinfection method based on nano-catalysis advanced oxidation |
| CN115838164A (en) * | 2022-12-14 | 2023-03-24 | 上海电力大学 | Biochar, preparation method thereof and method for degrading sulfonamide antibiotics by using biochar to activate peracetic acid |
| CN116002842A (en) * | 2022-12-22 | 2023-04-25 | 昆明理工大学 | Method for degrading carbamazepine by activating peroxyacetic acid with carbon nano tube supported catalyst |
| CN116002842B (en) * | 2022-12-22 | 2024-04-12 | 昆明理工大学 | Method for degrading carbamazepine by activating peroxyacetic acid with carbon nano tube supported catalyst |
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