Method for synergistically degrading refractory organic matters in village and town sewage by using hydrogen peroxide component in low-concentration peracetic acid

A technology of refractory organic matter and peracetic acid, applied in the direction of oxidized water/sewage treatment, chemical instruments and methods, water pollutants, etc., can solve problems such as poor effect, achieve cost reduction, good reusability, and shorten process Effect

Pending Publication Date: 2021-09-21
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the rapid reaction of this traditional homogeneous Fenton, its effect on macromolecular organic compounds with poor biodegradability is often poor; various heterogeneous Fenton-like systems have emerged, and solid iron-based The material replaces the direct addition of Fe 2+ , allowing it to continuously release Fe in the system 2+ , so as to ensure its continuous oxidative degradation effect on refractory organic matter

Method used

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  • Method for synergistically degrading refractory organic matters in village and town sewage by using hydrogen peroxide component in low-concentration peracetic acid
  • Method for synergistically degrading refractory organic matters in village and town sewage by using hydrogen peroxide component in low-concentration peracetic acid
  • Method for synergistically degrading refractory organic matters in village and town sewage by using hydrogen peroxide component in low-concentration peracetic acid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] This example provides a method for synergistically degrading refractory organic matter in village and town sewage by utilizing the hydrogen peroxide component in low-concentration peracetic acid, making full use of the hydrogen peroxide component in low-concentration peracetic acid to cooperate with peracetic acid to degrade village and town sewage Medium refractory organics, including the following steps:

[0039] (1) Turn on the 254nm low-pressure mercury lamp for 30 minutes to ensure a stable output of ultraviolet radiation, and the power of the low-pressure mercury lamp is 10W.

[0040] (2) 40mL of spiramycin solution with 0.1M dilute sulfuric acid solution to control the initial pH of the solution is 4 to prepare an initial concentration of 10mg / L in a quartz tube, then immediately add a certain amount of peracetic acid to make its concentration 3mg / L (when When the effective concentration of PAA is controlled at 3mg / L, the H contained in the low-concentration PAA ...

Embodiment 2

[0045] This example provides a method for synergistically degrading refractory organic matter in village and town sewage by utilizing the hydrogen peroxide component in low-concentration peracetic acid, making full use of the hydrogen peroxide component in low-concentration peracetic acid to cooperate with peracetic acid to degrade village and town sewage Medium refractory organics, including the following steps:

[0046] (1) Turn on the 254nm low-pressure mercury lamp for 30 minutes to ensure a stable output of ultraviolet radiation, and the power of the low-pressure mercury lamp is 10W.

[0047] (2) 40mL of spiramycin solution with 0.1M dilute sulfuric acid solution to control the initial pH of the solution is 4 to prepare an initial concentration of 10mg / L in a quartz tube, then immediately add a certain amount of peracetic acid to make its concentration 3mg / L (when When the effective concentration of PAA is controlled at 3mg / L, the H contained in the low-concentration PAA ...

Embodiment 3

[0052] This example provides a method for synergistically degrading refractory organic matter in village and town sewage by utilizing the hydrogen peroxide component in low-concentration peracetic acid, making full use of the hydrogen peroxide component in low-concentration peracetic acid to cooperate with peracetic acid to degrade village and town sewage Medium refractory organics, including the following steps:

[0053] (1) Turn on the 254nm low-pressure mercury lamp for 30 minutes to ensure a stable output of ultraviolet radiation, and the power of the low-pressure mercury lamp is 10W.

[0054] (2) 40mL of spiramycin solution with 0.1M dilute sulfuric acid solution to control the initial pH of the solution is 4 to prepare an initial concentration of 10mg / L in a quartz tube, then immediately add a certain amount of peracetic acid to make its concentration 3mg / L (when When the effective concentration of PAA is controlled at 3mg / L, the H contained in the low-concentration PAA ...

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Abstract

The invention provides a method for synergistically degrading refractory organic matters in village and town sewage by using a hydrogen peroxide component in low-concentration peracetic acid. The method comprises the following steps of: adding nano zero-valent iron serving as a catalyst and a low-concentration peracetic acid solution which serves as an oxidant and contains hydrogen peroxide into water containing antibiotics; irradiating the mixed solution by using ultraviolet light emitted by a low-pressure mercury lamp 1; using the nano zero-valent iron and the ultraviolet light to jointly activate strong oxidizing free radicals generated by the oxidant, and using the direct photolysis effect of the ultraviolet light to synergistically degrade the refractory organic matters in the village and town sewage. According to the method, the hydrogen peroxide in low-concentration peracetic acid is used for cooperating with peracetic acid, the nZVI catalyst is added, meanwhile, ultraviolet irradiation is carried out to construct an nZVI/UV/PAA heterogeneous strengthening system, and nZVI and UV are used for activating to generate strong oxidizing free radicals to oxidize and remove antibiotics; the method has the advantages of high treatment efficiency, simplicity and convenience in operation, good reusability of the catalyst, low cost and the like.

Description

technical field [0001] The invention belongs to the field of water treatment technology and application, in particular to a method for synergistically degrading refractory organic matter in village and town sewage by using hydrogen peroxide components in low-concentration peracetic acid. Background technique [0002] In recent years, the focus of environmental research has expanded from traditional environmental pollutants such as PCBs, dioxins, and pesticides to some emerging pollutants. Antibiotics have been included in the category of emerging environmental pollutants due to their refractory properties and possible significant impact on human health and the environment. Spiramycin (SPI) is a common macrolide veterinary antibiotic, which is widely used because it can treat diseases such as poultry pneumonia, enteritis and respiratory tract infection, and can relieve stress response and increase growth rate. The presence of spiramycins has been widely detected in aquatic e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/72C02F1/32C02F101/30
CPCC02F1/722C02F1/725C02F1/32C02F2101/30C02F2305/023C02F2305/10
Inventor 王林严婷婷李咏梅平倩孙启雅
Owner TONGJI UNIV
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