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Method for removing medicines in urine by activating peracetic acid with human excrement biochar

A technology of peracetic acid and biochar, applied in chemical instruments and methods, water pollutants, water treatment of special compounds, etc., can solve the problems of expensive carbon nanotubes, difficult recovery of metal ions, and increased use costs, and achieve application Low cost, reduced disposal cost, enhanced oxidation performance

Active Publication Date: 2020-08-28
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the energy consumption of ultraviolet activation is relatively high, and although metal ion activation has a good degradation effect on pollutants, it is prone to secondary pollution problems, and as a homogeneous catalyst, metal ions are not easy to recycle and have a short service life. , the utilization rate is low, which greatly increases its use cost
Compared with ultraviolet activation and metal compounds, carbonaceous materials, as a new type of material, have shown their unique properties in the field of catalysis and are also used in the activation of peracetic acid. For example, the invention patent with publication number CN108423793A discloses a A method for carbon nanotubes to activate peracetic acid to degrade pollutants in wastewater. Although this method can achieve efficient degradation of pollutants in wastewater, this method is mainly aimed at sewage containing azo dyes, and carbon nanotubes are expensive high cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A method for activating peracetic acid to remove drugs in urine by biochar made from human feces, comprising the following steps:

[0023] (1) Preparation of biochar: 5g of feces with a water content of 82% (obtained by air-drying after collecting from the stool mouth of the toilet without water source separation, the same below) is placed in a crucible, covered, and placed in a tube furnace under a nitrogen atmosphere. Pyrolyze at 500°C for 4 hours, wash with deionized water until neutral after cooling, dry at 120°C for 48 hours, and grind to obtain biochar;

[0024] (2) Removal of drugs in urine: Take 100mL of urine collected through the urinal of an anhydrous-separated toilet, refrigerate at 4°C for 24 hours, add 0.2mL of peracetic acid solution with a mass concentration of 10g / L to the urine, and quickly adjust The pH of the solution was 7, and then 25 mg of the biochar prepared in step (1) was added, and the reaction was stirred at room temperature for 180 min at a...

Embodiment 2

[0026] A method for activating peracetic acid to remove drugs in urine by biochar made from human feces, comprising the following steps:

[0027] (1) Preparation of biochar: 5 g of feces with a moisture content of 80% were placed in a crucible, covered, and pyrolyzed at 400° C. for 7 hours in a tube furnace under an argon atmosphere, and washed with deionized water after cooling. neutral, and dried at 200°C for 12 hours, and ground to obtain biochar;

[0028] (2) Removal of drugs in urine: Take 100mL of urine collected through the urinal of an anhydrous-separated toilet, refrigerate at 4°C for 24 hours, add 0.2mL of peracetic acid solution with a mass concentration of 10g / L to the urine, and quickly adjust The pH of the solution was 7, and then 20 mg of the biochar prepared in step (1) was added, and the reaction was stirred at room temperature for 180 min at a stirring rate of 800 rpm. Adopt high performance liquid chromatography to measure the concentration of oxcarbazepine...

Embodiment 3

[0030] A method for activating peracetic acid to remove drugs in urine by biochar made from human feces, comprising the following steps:

[0031] (1) Preparation of biochar: 5 g of feces with a moisture content of 83% were placed in a crucible, covered, and pyrolyzed in a tube furnace at 800° C. for 2 h under a nitrogen atmosphere, and washed with deionized water to medium after cooling. properties, and dried at 150°C for 24 hours, and ground to obtain biochar;

[0032] (2) Removal of drugs in urine: Take 100mL of urine collected through the urinal of an anhydrous-separated toilet, refrigerate at 4°C for 24 hours, add 0.2mL of peracetic acid solution with a mass concentration of 10g / L to the urine, and quickly adjust The pH of the solution was 7, and then 30 mg of the biochar prepared in step (1) was added, and the reaction was stirred at room temperature for 180 min at a stirring speed of 1000 rpm. Adopt high performance liquid chromatography to measure the concentration of ...

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PUM

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Abstract

The invention discloses a method for removing medicines in urine by activating peracetic acid with human excrement biochar, and belongs to the technical field of wastewater treatment. The method comprises the following steps: firstly, putting air-dried excrement into a crucible, pyrolyzing for 2-8 hours at 300-800 DEG C in a protective gas atmosphere, and cooling, washing, drying and grinding to obtain biochar; and refrigerating the urea at 0-10 DEG C for 24-48 h, adding peracetic acid into the urea, adjusting the pH value of the solution to 7, adding the prepared biochar, and stirring at roomtemperature for reaction, wherein the addition amount of peracetic acid is 0.01-0.1 g / L, and the addition mass ratio of charcoal to peracetic acid is (2-20):1. According to the method disclosed by the invention, starting from an excrement source, biochar prepared by pyrolysis of human excrement is selected as an activating agent to activate peracetic acid to degrade and remove medicines in urine,so that the method not only has a relatively high medicine removal rate, but also can realize closed-loop utilization of excrement.

Description

technical field [0001] The invention relates to a method for removing drugs in urine by activating peracetic acid with biochar made from human feces, and belongs to the technical field of wastewater treatment. Background technique [0002] With the rapid growth of the population and the continuous development of the pharmaceutical industry, the number of antibiotics used worldwide is increasing year by year. The overuse of antibiotics has caused a large increase in resistant bacteria and resistant genes in the environment, which has caused extremely adverse effects on the ecosystem. Most of the antibiotics currently used are water-soluble, and about 90% of the antibiotics can be excreted with animal urine. As a refractory organic pollutant, antibiotics are often difficult to remove by traditional biological treatment methods. Advanced oxidation technology is a new technology suitable for the treatment of refractory organic pollutants. It has the characteristics of strong o...

Claims

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Application Information

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IPC IPC(8): C02F1/72C02F101/38C02F101/34
CPCC02F1/722C02F2101/38C02F2101/34C02F2305/023
Inventor 周雪飞张亚雷陈家斌张唯杨黎彬
Owner TONGJI UNIV
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