Method for removing sulfonamides in water by using modified zeolite to activate peracetic acid

A technology of sulfonamide drugs and peracetic acid, which is applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, water pollutants, etc., can solve the problems of failure, difficulty in storage, and low utilization efficiency. , to achieve the effect of low application cost, avoid secondary pollution, and increase contact

Active Publication Date: 2018-11-23
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, Fe 2+ Easily oxidized by dissolved oxygen, etc., Fe 2+ Utilization efficiency is low, so based on Fe 2+ The homogeneous activation technology usually requires an acidic atmosphere
In addition, Fe 2+ The preservation of the solution is difficult, and generally needs to be temporarily prepared before use

Method used

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  • Method for removing sulfonamides in water by using modified zeolite to activate peracetic acid
  • Method for removing sulfonamides in water by using modified zeolite to activate peracetic acid

Examples

Experimental program
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Effect test

Embodiment 1

[0030] Embodiment 1: a kind of utilization Fe 2+ / artificial zeolite activated peracetic acid removes the method for sulfa antibiotics in water, it comprises the following steps:

[0031] S1. Catalyst preparation: Grind artificial zeolite into 200-mesh uniform fine powder, weigh a certain mass and add it to dilute sulfuric acid with a concentration of 0.05mol / L, so that the acid solution just submerges the powder, stir evenly and let it stand for 24 hours. Wash with deionized water until the pH is 6.8, and dry in a muffle furnace at 100°C. According to zeolite, Fe 2+ Add a certain amount of dried fine powder into the ferrous sulfate solution with a concentration of 0.2mol / L at a mass ratio of 60:1, soak for 20 hours, wash with deionized water for 3 to 4 times, and centrifuge to separate the solid Dry it in an oven at 100°C to make a catalyst.

[0032] S2. Oxidation reaction: Add 0.4mL to 50mL of peracetic acid solution with a concentration of 10g / L to 50mL 0.1mg / L sulfameth...

Embodiment 2

[0035] Embodiment 2: a kind of utilization Fe 2+ / artificial zeolite activated peracetic acid removes the method for sulfa antibiotics in water, it comprises the following steps:

[0036] S1. Catalyst preparation: Grind artificial zeolite into 200-mesh uniform fine powder, weigh a certain mass and add it to dilute sulfuric acid with a concentration of 0.1mol / L, so that the acid solution just submerges the powder, stir evenly and let it stand for 19 hours. Wash with deionized water until the pH is 7.0, and dry in a muffle furnace at 100°C. According to zeolite, Fe 2+ Add a certain amount of dried fine powder into the ferrous sulfate solution with a concentration of 0.2mol / L at a mass ratio of 55:1, soak for 24 hours, wash with deionized water for 3 to 4 times, and centrifuge to separate the solid Place it in an oven at 70°C and dry it to make a catalyst.

[0037] S2. Oxidation reaction: Add 0.5mL to 100mL of peracetic acid solution with a concentration of 10g / L to 100mL 0.5m...

Embodiment 3

[0040] Embodiment 3: a kind of utilization Fe 2+ / artificial zeolite activated peracetic acid removes the method for sulfa antibiotics in water, it comprises the following steps:

[0041] S1. Catalyst preparation: Grind the artificial zeolite into 300-mesh uniform fine powder, weigh a certain mass and add it to dilute sulfuric acid with a concentration of 0.1mol / L, so that the acid solution just immerses the powder, stir evenly and let it stand for 24 hours. Wash with deionized water until the pH is 6.8, and dry in a muffle furnace at 100°C. According to zeolite, Fe 2+ Add a certain amount of dried fine powder into the ferrous sulfate solution with a concentration of 0.4mol / L at a mass ratio of 65:1, soak for 24 hours, wash with deionized water for 3 to 4 times, and centrifuge to separate the solid Place it in an oven at 90°C and dry it to make a catalyst.

[0042] S2. Oxidation reaction: Add 10g / L peracetic acid solution 2.0mL to 200mL 1.5mg / L sulfamethoxazole wastewater, ...

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Abstract

The invention discloses a method for removing sulfonamides in water by using modified zeolite to activate peracetic acid. The method comprises the following steps: S1, preparing a catalyst: grinding artificial zeolite into fine powder, acid pickling, washing, drying, soaking in a ferrous sulfate solution for a period of time, centrifugally separating, washing solids by using deionized water, and drying; S2, performing the oxidization reaction: adding a prepared peracetic acid solution into sulfamethoxazole waste water, adjusting initial pH of water water, adding an appropriate amount of catalyst, and performing the oxidization reaction under the normal temperature normal pressure stirring condition. The adopted catalytic material is simple in preparation, easy to store, high in activationefficiency and low in active component and low in active component dissolution rate; the activated peracetic acid system is high in oxidation performance, the treatment process also has the sterilizing function, the combination of the further treatment and disinfection treatment for the waste water can be realized, the compatibility with the modern water treatment factory process is high, the sulfamethoxazole degradation efficiency is high, the reaction condition is mild, the cost is low, and the method is suitable for the industrialized mass treatment of the waste water.

Description

technical field [0001] The invention relates to an advanced oxidation method based on activated peracetic acid, specifically a method using Fe 2+ / Artificial zeolite activated peracetic acid method for removing sulfa antibiotics in water. Background technique [0002] Sulfa antibiotics are mainly used in medical treatment, breeding and other fields, and have strong migration ability in the environment, and are one of the main antibiotic pollutants in the water environment. At present, sulfa antibiotics in surface water in my country have reached the level of ng / L. Especially for sulfamethoxazole, its content in some water bodies even exceeds hundreds of ng / L. The concentration of sulfonamide antibiotics is higher in the influent of sewage treatment plants. Since the existence of such pollutants in water bodies has seriously threatened the survival of aquatic animals and plants and human health, it is necessary to develop efficient and environmentally friendly technologies...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/745C02F1/72C02F101/38
CPCB01J23/745C02F1/722C02F1/725C02F2101/38C02F2101/40C02F2305/023
Inventor 付永胜汪诗翔刘义青张李吴鹏
Owner SOUTHWEST JIAOTONG UNIV
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