Method for disinfecting water body based on multi-component composite material visible light catalysis

A composite material and visible light technology, which is applied in chemical instruments and methods, disinfectants, special compound water treatment, etc., can solve the problems of sterilizing efficiency to be strengthened, consumption, etc., to achieve water purification effect, high conductivity, and reduce agglomeration The effect of the phenomenon

Active Publication Date: 2020-07-24
ZHEJIANG UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, it generally takes 1-4 hours to achieve a bacterial inactivation rate of 3 logs through photocatalytic sterilization, and the sterilization efficiency needs to be strengthened

Method used

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  • Method for disinfecting water body based on multi-component composite material visible light catalysis
  • Method for disinfecting water body based on multi-component composite material visible light catalysis
  • Method for disinfecting water body based on multi-component composite material visible light catalysis

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Example 1 Zinc-manganese ferrite / nano-silver / graphene multi-component composite material efficiently inactivates Escherichia coli under visible light irradiation, the steps are as follows:

[0033] 1) Dissolve 1.26g of citric acid in 10mL of deionized water to prepare a citric acid solution. 0.3g Zn(NO 3 ) 2 ·6H 2 O, 0.25g Mn(NO 3 ) 2 4H 2 O and 1.6g Fe(NO 3 ) 3 9H 2 O was dissolved in 20 mL of deionized water, mixed with the above-prepared citric acid solution, stirred, and sonicated, then transferred to a water bath at 65 °C and stirred at a low speed for 15 minutes to form a uniform citric acid complex, namely Zn / Mn / Fe -Citrate complex (citric acid is used as a complexing agent, the main purpose here is to improve the steric effect between metal ions and obtain small-scale nanomaterials);

[0034] 2) Dissolve 1.36g NaOH in 10mL water to prepare NaOH solution. Under vigorous stirring, the NaOH solution prepared above was slowly added dropwise to the mixed so...

Embodiment 2

[0057] Example 2 Zinc-manganese ferrite / nano-silver / graphene multi-component composite material efficiently inactivates Pseudomonas aeruginosa under visible light irradiation, the steps are as follows:

[0058] In this example, the preparation process of zinc-manganese ferrite / nano-silver / graphene multi-component composite material was repeated in Example 1.

[0059] The multi-component composite material prepared in Example 2 is applied to water body disinfection and sterilization, and the process is as follows:

[0060] S1: Prepare 50 mL of pre-cultured Pseudomonas aeruginosa in pH 7.4 phosphate buffer solution, control the logarithmic value of the colony at about 7, add 5 mg of the zinc-manganese ferrite / nano-silver / graphene multi-component composite material prepared in Example 2 ;

[0061] S2: Under magnetic stirring, turn on the LED light and add 8.5 microliters of 30% H 2 o 2 Solution, stimulate the visible light photo-Fenton catalytic reaction;

[0062] S3: After 3...

Embodiment 3

[0064] Example 3 Zinc-manganese ferrite / nano-silver / graphene multi-component composite material efficiently inactivates Staphylococcus aureus under visible light irradiation, the steps are as follows:

[0065] In this example, the preparation process of zinc-manganese ferrite / nano-silver / graphene multi-component composite material was repeated in Example 1.

[0066] The multi-component composite material prepared in Example 3 is applied to disinfection and sterilization of water bodies, and the process is as follows:

[0067] S1: Prepare 50 mL of pre-cultivated Staphylococcus aureus in pH 7.4 phosphate buffer, control the logarithm of the colony to be around 7, add 5 mg of the zinc-manganese ferrite / nano-silver / graphene multi-component composite material prepared in Example 3;

[0068] S2: Under magnetic stirring, turn on the LED light and add 8.5 microliters of 30% H 2 o 2 Solution, stimulate the visible light photo-Fenton catalytic reaction;

[0069] S3: After 30 minutes,...

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Abstract

The invention discloses a method for disinfecting a water body based on multi-component composite material visible light catalysis. The method comprises the following steps: adding a zinc-manganese ferrite/nano-silver/graphene multi-component composite material with a two-dimensional nano-structure into the water body, adding hydrogen peroxide, and exciting a visible light catalytic reaction underthe irradiation of visible light to eliminate harmful bacteria in the water body; and after the reaction is finished, recovering the zinc-manganese ferrite/nano-silver/graphene multi-component composite material in the water body through magnetic separation to obtain purified water after disinfection treatment. The prepared multi-component composite material has a magnetic and two-dimensional nano-structure, and compared with a nano-particle structure, the agglomeration of nano-particles can be effectively controlled, and the dispersity of the material in the water body is improved. The multi-component composite material can play a role in disinfection and sterilization under the irradiation of visible light and avoids the use of high-energy-consumption ultraviolet irradiation and also can effectively avoid toxic carcinogenic byproducts caused by chlorine disinfection and the method is a new method which is more environment-friendly and sustainable.

Description

technical field [0001] The invention relates to a method for disinfecting water bodies based on multi-element composite material visible light catalysis. Background technique [0002] Water problems are closely related to ecological health, national economic development and the welfare of future generations. According to the World Health Organization (WHO), more than 500 million people around the world lack safe drinking water every year, and millions of people die from drinking sewage carrying pathogens. Traditional water disinfection technologies include ozonation, chlorination, and ultraviolet light disinfection processes. These methods have their own shortcomings or potential hazards, such as harmful disinfection by-products, high energy consumption, or carrying environmentally toxic substances (mercury lamps), etc. . For the above reasons, new methods are needed to replace traditional sterilization methods. The combination of disinfection technology, nano-particles, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/30C02F1/72B01J23/89B01J37/16A01N59/16A01P1/00
CPCC02F1/30C02F1/722B01J23/8986B01J35/004B01J35/023B01J23/002B01J35/0033B01J37/16A01N59/16C02F2303/04C02F2305/10B01J2523/00B01J2523/27B01J2523/72B01J2523/842
Inventor 胡钟霆金子彦赵峻陈月刘嘉炜丁寅邢文豪龚思燕赵佳
Owner ZHEJIANG UNIV OF TECH
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