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Degradation treatment method for copper complexing reinforced tetracycline pollutants

A treatment method, tetracycline technology, applied in the field of water pollution treatment, can solve problems such as limiting the practical application of sulfite advanced oxidation process

Active Publication Date: 2021-09-07
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, studies have shown that transition metals can activate sulfite to generate sulfate radicals to degrade organic matter. However, these activation processes often require low pH acidic conditions, which limits the practical application of sulfite advanced oxidation processes.

Method used

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  • Degradation treatment method for copper complexing reinforced tetracycline pollutants
  • Degradation treatment method for copper complexing reinforced tetracycline pollutants
  • Degradation treatment method for copper complexing reinforced tetracycline pollutants

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) Tetracycline solution and copper sulfate solution were used to prepare 100 mL of 50 μM tetracycline-copper complex wastewater with a molar ratio of 1:1, and 126 mg of sodium sulfite was added to make the initial reaction concentration 1 mM. , stir evenly;

[0035] (2) Use sulfuric acid or sodium hydroxide to adjust the pH of the wastewater system to 5, quickly add 10 mg of ferrous sulfide to make the initial reaction concentration 100 mg / L, and fully stir;

[0036] (3) Sampling and measuring the concentration of residual tetracycline and copper ions in the water sample at different time points, and the whole reaction is completed after 60 minutes of reaction;

[0037] The above treatment processes are all carried out under aerobic conditions, and the concentration of dissolved oxygen is controlled at 7.6-11.5mg / L.

[0038] In this embodiment, the effect of ferrous sulfide activating sodium sulfite to degrade tetracycline is as attached figure 1 shown. From attach...

Embodiment 2

[0040] Basically the same as Example 1, except that the pH was adjusted to 3, 4, 5, 6, 7, 8, 9 respectively in step (2). attached figure 2 is the removal effect of tetracycline at different initial pH. As can be seen from the figure, after the pH is greater than 6, the complex of tetracycline and copper will generate a precipitate, and the physical method of precipitation can remove 16% (pH=6), 54% (pH=7), 62% ( pH=8) and 14% (pH=9) tetracycline, and the system of ferrous sulfide activated sodium sulfite has a good removal effect on tetracycline under neutral and slightly acidic conditions, at pH=3,4,5,6 The removal rate of tetracycline in aqueous solution can reach 70%, 74%, 77% and 73%. According to the pH environment of the pollutants, make full use of the advantages of ferrous sulfide activation of sulfite to oxidize and degrade tetracycline under acidic conditions and the co-precipitation and removal of tetracycline-complexes under neutral and alkaline conditions. The...

Embodiment 3

[0042] Basically the same as in Example 1, except that the concentration of copper ions in step (1) is adjusted to 0, 10, 25, 50, 100, 200 μM, the specific effects are as follows image 3 . It can be seen that the complexation of copper ions significantly promotes the degradation of tetracycline, and tetracycline hardly degrades when no copper ions are added or the concentration of copper ions is 10 μM. The higher the concentration of copper ions in the system, the earlier the time point for the degradation of tetracycline.

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Abstract

The invention relates to a copper complexation reinforced tetracycline pollutant degradation treatment method which comprises the following steps: (1) due to the fact that livestock or aquaculture wastewater simultaneously contains tetracycline and copper ion pollutants and a tetracycline copper complex is inevitably formed, adding a copper ion reagent into a to-be-treated water sample containing tetracycline pollutants to form a tetracycline copper complex, then adding sulfite, and adjusting the pH value to 3-9; and (2) continuously adding ferrous sulfide, and carrying out a mixed reaction so as to complete degradation treatment on the tetracycline-copper complex pollutants. Compared with the prior art, the natural mineral ferrous sulfide is used for activating the by-product sulfite of the desulfurization process to generate active species, the green and environment-friendly concept of treating waste with waste is fully played, and the degradation effect of tetracycline in the ferrous sulfide / sulfite system can be enhanced through copper ions complexed with tetracycline of pollutants.

Description

technical field [0001] The invention belongs to the technical field of water pollution treatment, and relates to a copper complexation-enhanced degradation treatment method for tetracycline pollutants. Background technique [0002] Tetracycline antibiotics are a class of spectrum antibiotics produced by Streptomyces, which are widely used in the treatment of human and animal diseases, and as feed additives to promote the growth of livestock, poultry and aquaculture animals. In addition, heavy metals such as copper are often added to feed as indispensable elements for the growth and development of livestock and poultry. However, heavy metals and tetracycline cannot be completely absorbed when they enter the animal body, and 40% to 70% will enter the natural environment in the form of the mother along with the excrement. Since tetracyclines are biologically active, stable and non-biodegradable, their long-term presence in the natural environment will not only increase the ris...

Claims

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Application Information

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IPC IPC(8): C02F1/72C02F101/34C02F101/38
CPCC02F1/725C02F2305/023C02F2305/02C02F2101/34C02F2101/345C02F2101/38
Inventor 樊金红蔡颖
Owner TONGJI UNIV
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