A water treatment method based on manganese-cobalt composite oxide nanoparticles modified ceramic membrane

A nanoparticle modification and composite oxide technology, which is applied in the fields of oxidized water/sewage treatment, permeate/dialysis water/sewage treatment, etc., can solve the problems such as impossibility to reduce the permeate flow and separation characteristics, pollution and blockage.

Active Publication Date: 2019-03-19
BEIJING FORESTRY UNIVERSITY
View PDF6 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the process of membrane filtration, the particles, colloidal particles or solute macromolecules in the water are adsorbed or deposited on the surface of the membrane or in the pores of the membrane due to the physical, chemical or mechanical interaction with the membrane, resulting in a smaller or smaller membrane pore size. Clogging, leading to membrane fouling in which the permeate flow rate and separation characteristics cannot be reduced

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 water treatment method based on manganese-cobalt composite oxide nanoparticles modified ceramic membrane
  • A water treatment method based on manganese-cobalt composite oxide nanoparticles modified ceramic membrane
  • A water treatment method based on manganese-cobalt composite oxide nanoparticles modified ceramic membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0030] The method for assembling the catalytic ceramic membrane modified by manganese-cobalt composite oxide nanoparticles will be described below in conjunction with specific embodiments, so as to further understand the invention. The technical solution of the present invention is not limited to the specific embodiments listed below, but also includes any combination of the specific embodiments.

specific Embodiment approach 1

[0031] Specific implementation mode one: MnO 2 -Co 3 o 4 The assembly method of the nanoparticle-modified catalytic ceramic membrane can be realized through the following steps:

[0032] (1) Accurately weigh 13.0973g Co(NO 3 ) 2 ·6H 2 O and 2.3706 g KMnO 4 , were completely dissolved in 200mL of deionized water, so that the solute was completely dissolved to obtain a clear solution;

[0033] (2) Co(NO 3 ) 2 Add the solution dropwise to the KMnO at a rate of 2-3 drops per second 4 In the solution, use 5mol / L NaOH at the same time to adjust the pH of the mixed solution to 7-8, while the mixed solution is continuously stirred at 800rpm / min to obtain a homogeneous suspension;

[0034] (3) to be Co(NO 3 ) 2 After the solution was added dropwise, the mixed solution continued to stir for 1 h to ensure that the reaction was carried out completely;

[0035] (4) Aging the suspension for 12 hours at room temperature;

[0036] (5) Wash and age the obtained solid with deionize...

specific Embodiment approach 2

[0043] Specific embodiment two: the difference between this embodiment and specific embodiment one is that 13.0973g (45mmmol) Co(NO 3 ) 2 ·6H 2 O can be replaced by 10.7069g CoCl 2 ·6H 2 O, other steps and parameters are the same as those in Embodiment 1.

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

PropertyMeasurementUnit
specific surface areaaaaaaaaaaa
pore sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
Login to view more

Abstract

The invention relates to an advanced water treatment technique for pollution removal through heterogeneous catalytic ozonation. Directed at the disadvantage that a conventional powdery catalyst is unfavorable for realizing separation and inactivation in a water phase, an assembly method for a novel manganese-cobalt complex oxide nanoparticle catalyst-loaded ceramic membrane is provided. The assembly method aims to combine heterogeneous ozonation with a ceramic membrane filtration technique, and utilizes a ceramic membrane structure and active components (MnO2 and Co3O4) on a catalytic layer to catalyze ozone so as to generate -OH with high oxidation capacity, wherein organic compounds can realize reinforced removal of pharmaceutical and personal care products (PPCPs) like 2-hydroxyl-4-methoxybenzophenone in water through direct reaction with molecular ozone or reaction with -OH generated by ozone decomposition; meanwhile, ozone can react with humic acid and natural organic matters (NOMs) in the water, so the formation of membrane pollution is effectively controlled. The manganese-cobalt complex oxide nanoparticles are loaded on the surface of the ceramic membrane, so separation of the catalyst from the water is realized, and a novel method for cleaning and repeated use of the catalyst is provided.

Description

technical field [0001] The invention relates to the assembly of a manganese-cobalt composite oxide nano-particle modified catalytic ceramic membrane and its application in catalytic ozone oxidation and pollution removal technology. Background technique [0002] In recent years, with the development of pharmaceutical and personal care industries, Pharmaceutical and Personal Care Products (PPCPs), as an emerging pollutant, have attracted increasing attention. Many PPCPs components have strong biological activity, optical rotation and polarity, and most of them exist in the environment in trace concentrations, ranging from ng / L to μg / L. The use of veterinary medicine, agricultural medicine, human medicine and cosmetics is the main way it is introduced into the environment. Most of the PPCPs are discharged into the sewage in the original or converted form and enter the sewage treatment plant with the sewage. The representative substances of the PPCPs detected include antimicrob...

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): C02F1/44C02F1/78
Inventor 齐飞郭杨
Owner BEIJING FORESTRY UNIVERSITY
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