A kind of method of controlling ozone bromate by-product

A technology of bromate and by-products, applied in the field of controlling bromate by-products of ozone, can solve problems such as consumption, weak inhibition effect, and accelerated bromate formation

Active Publication Date: 2021-04-09
SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Graphene oxide can catalyze the decomposition of ozone to generate hydroxyl radicals, and has rich oxygen-containing groups, good chemical modification and water dispersibility, making it show advantages in ozone catalytic oxidation; however, graphene oxide synergizes with the ozone oxidation process will accelerate the formation of bromate
Ceria has a good inhibitory effect on bromate formation in the process of ozonation, but the mechanical mixture of pure graphene oxide and ceria has a weak effect on the inhibition of bromate formation in the catalytic ozonation process, and consumes a large amount of ceria

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of method of controlling ozone bromate by-product
  • A kind of method of controlling ozone bromate by-product
  • A kind of method of controlling ozone bromate by-product

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment one: cerium oxide-graphene oxide (Ce x -GO) is used in conjunction with ozone, wherein x% represents the atomic number percentage content of Ce in cerium oxide-graphene oxide

[0031] To the 1mg / L bromide ion solution that is equipped with phosphate-adjusted pH (phosphate adjustment is to ensure that the pH of the reaction system is maintained at neutral during the reaction, so that the pH of the system is not affected by the substances generated in the reaction). Add cerium oxide-graphene oxide in the ozone reactor, make the mass concentration of cerium oxide-graphene oxide be 20mg / L, feed the ozone that concentration is 5mg / L, flow rate is 0.4NL / min, utilize ozone to add oxidation The bromide ion solution of cerium-graphene oxide was aerated, and samples were taken every 2 minutes, and the graphene oxide was removed by filtration with a 0.22 μm syringe filter, and the concentrations of bromide ions and bromate were determined. Wherein, the residence time o...

Embodiment 2

[0033] Example 2: Degradation of DEET

[0034] Add equal amounts of GO, CeO and 2 、Ce 0.36 -GO, inject ozone with a concentration of 5mg / L and a flow rate of 0.4NL / min, use ozone to aerate the DEET solution, take samples every 2min, filter with a 0.22μm needle filter, and measure DEET concentration. Among them, the residence time of the DEET solution in the ozone reactor is controlled to be 10 minutes, and the state of stirring and ozone is kept during the water treatment process. Then draw the removal rate graph, such as image 3 shown in the line chart. pass image 3 It can be seen that the ability to degrade DEET through cerium oxide-graphene oxide catalytic ozonation has been greatly improved, which is equivalent to the catalytic degradation ability of graphene oxide; while cerium oxide has no effect on the degradation of DEET by ozone oxidation. , and slightly suppressed.

[0035] In this embodiment, the cerium oxide-graphene oxide can be added directly in the form...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a method for controlling the by-product of ozone bromate, comprising: preparing cerium oxide-graphene oxide by a hydrothermal method, adding cerium oxide-graphene oxide to an ozone reactor equipped with water to be treated, and utilizing ozone Aeration of the water to be treated with addition of ceria-graphene oxide. The method for controlling the by-product of ozone bromate proposed by the invention can effectively catalyze the oxidation of ozone to degrade organic matter, and effectively inhibit the generation of bromate in the process of catalytic ozonation.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a method for controlling the by-product of ozone bromate. Background technique [0002] As a green, strong oxidizing agent, ozone has been widely used in water treatment process. However, due to the selective oxidation characteristics of ozone and the low reaction rate with pollutants, it is limited in the field of water treatment. Advanced oxidation technology uses the non-selective strong oxidation ability of hydroxyl radicals to degrade organic matter. Currently advanced oxidation technologies include ozone oxidation, photochemical oxidation, catalytic wet oxidation, sonochemical oxidation, electrochemical oxidation, Fenton oxidation, etc. Ozone in water can directly oxidize organic matter by using ozone molecules, and can also indirectly oxidize organic matter by using hydroxyl radicals generated by ozone decomposition. These two reactions exist simultaneously in th...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/78
CPCC02F1/725C02F1/78C02F2101/12
Inventor 吴乾元叶蓓胡洪营杨诚刘嘉南
Owner SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap