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A method for catalytic ozone oxidation to remove organic pollutants and synergistic bactericidal and antibacterial methods

A technology for organic pollutants and ozone oxidation, applied in the field of water treatment, to achieve good sterilization effect, fast speed, and low ozone concentration requirements

Active Publication Date: 2020-06-16
建德市环保科技创新创业中心有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The purpose of chlorination disinfection of drinking water is to eliminate pathogens in the water, but later studies have found that many disinfection by-products (disinfection by-products, DBPs) will be produced in the water after chlorine disinfection

Method used

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  • A method for catalytic ozone oxidation to remove organic pollutants and synergistic bactericidal and antibacterial methods
  • A method for catalytic ozone oxidation to remove organic pollutants and synergistic bactericidal and antibacterial methods

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) Pretreatment of B-type silica gel: B-type silica gel particles with a particle size of 1-2mm were washed with tap water, and dried in a constant temperature drying oven at 105°C. Soak 1kg of the cleaned type B silica gel with 8% NaOH aqueous solution for 2h, and then soak it with 8% dilute nitric acid solution for 2h to modify type B silica gel, and then wash it with tap water until neutral and dried at 105° C. to obtain a modified B-type silica gel carrier.

[0036] (2) Catalyst loading: immerse 1 kg of pretreated modified B-type silica gel carrier in a mixed solution of 1.2 times the volume of copper nitrate and manganese nitrate, wherein the mass fraction of copper nitrate is 1%, and the mass fraction of manganese nitrate is 1 %, mixed in a shaker for 24h, then filtered, treated with microwave radiation with a power of 800W and a frequency of 2450±50MHz for 20min, and then calcined in a muffle furnace at 500°C for 4h to obtain a catalyst.

[0037] (3) Catalytic ...

Embodiment 2

[0039] (1) Pretreatment of B-type silica gel: B-type silica gel particles with a particle size of 1-2mm were washed with tap water, and dried in a constant temperature drying oven at 105°C. Soak 1kg of the cleaned type B silica gel with 13% NaOH aqueous solution for 1h, and then soak it with 13% dilute nitric acid solution for 1h to modify type B silica gel, then wash with tap water until neutral and dried at 105° C. to obtain a modified B-type silica gel carrier.

[0040] (2) Catalyst loading: 1 kg of pretreated modified B-type silica gel carrier is immersed in 1.6 times the volume of copper nitrate and manganese nitrate mixed solution, wherein the mass fraction of copper nitrate is 2%, and the mass fraction of manganese nitrate is 4 %, mixed in a shaker for 12h, then filtered, treated with microwave radiation with a power of 800W and a frequency of 2450±50MHz for 20min, and then calcined in a muffle furnace at 500°C for 4h to obtain a catalyst.

[0041] (3) Catalytic ozone ...

Embodiment 3

[0043] (1) Pretreatment of B-type silica gel: B-type silica gel particles with a particle size of 3-5mm were washed with tap water, and dried in a constant temperature drying oven at 105°C. Soak 1kg of the cleaned type B silica gel with 10% NaOH aqueous solution for 2 hours, and then soak it with 10% dilute nitric acid solution for 2 hours to modify type B silica gel, and then wash it with tap water until neutral and dried at 105° C. to obtain a modified B-type silica gel carrier.

[0044] (2) Catalyst loading: immerse 1 kg of pretreated modified B-type silica gel carrier in 1.2 times the volume of copper nitrate, iron nitrate and manganese nitrate mixed solution, wherein the mass fraction of copper nitrate is 2%, the mass fraction of manganese nitrate The fraction is 4%, the mass fraction of iron nitrate is 4%, mixed in a shaker for 12h, then filtered, treated with microwave radiation with a power of 500W and a frequency of 2450±50MHz for 40min, and then calcined in a muffle ...

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Abstract

The invention discloses a method for removing organic pollutants and synergistically killing and inhibiting bacteria by means of catalytic ozonation. According to the method, ozone is mixed with a sample to be treated, and the mixture is then introduced into a device filled with a catalyst so as to be treated. A preparation method of the catalyst comprises the following steps: (1) putting silica gel into a NaOH aqueous solution for soaking, then putting the soaked silica gel into a nitric acid aqueous solution for dipping, taking out the silica gel, washing to neutral, and then drying to obtain a modified silica gel carrier; (2) dipping the modified silica gel carrier into a metal salt solution; after dipping is completed, drying and aging by means of microwave radiation; finally, calcining to obtain the catalyst. The multi-component catalyst obtained by the preparation method has the advantages of being rapid in reaction rate, more complete in degradation of organic micro-pollutants,free from toxic and harmful by-products, low in ozone demand concentration, high in ozone utilization efficiency, and the like when being used in treatment of tap water with the organic micro-pollutants. The catalytic ozonation also can be used for sterilizing the water body when removing the organic micro-pollutants; furthermore, the method is good in sterilizing effect and rapid in speed.

Description

technical field [0001] The invention relates to the field of water treatment, in particular to a method for catalyzing ozone oxidation to remove organic pollutants and synergistically killing and inhibiting bacteria. Background technique [0002] Water is the source of life, and excellent water quality is the guarantee for human health, ecological environment, and sustainable economic and social development. With the rapid development of modern industry, agriculture and urbanization, water resources in many areas of our country have been seriously polluted. Early water quality testing tended to focus on biochemical oxygen demand (BOD 5 ), chemical oxygen demand (COD), total organic carbon (TOC) and other comprehensive indicators, but in recent years it has been found that many organic micro-pollutants can cause serious damage to human health and the environment These substances contribute very little to the comprehensive index, but can cause serious consequences. [0003]...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/72C02F1/78B01J23/889C02F101/30
CPCB01J23/002B01J23/8892B01J2523/00C02F1/725C02F1/78C02F2101/30B01J2523/17B01J2523/41B01J2523/72
Inventor 徐洁潘江江官宝红
Owner 建德市环保科技创新创业中心有限公司
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