Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Efficient and rapid removal of as(iii) or as(v) based on magnetic core-shell bimetallic MOF

A bimetallic and magnetic technology, applied in the fields of alkali metal compounds, chemical instruments and methods, alkali metal oxides/hydroxides, etc., can solve problems such as pollution, achieve the effect of overcoming the difficulty of recycling, excellent effect, and simple operation

Active Publication Date: 2022-01-25
CENT SOUTH UNIV
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Purpose of the invention: In order to solve the situation of inorganic arsenic pollution in water bodies, the technical problem to be solved by the present invention is to provide a method that can not only convert As(III) into As(V) in combination with magnetic core-shell bimetallic MOF, but also convert both Both are removed from the water body. Therefore, the present invention proposes for the first time the method of using potassium persulfate to assist magnetic core-shell bimetallic MOF to remove As(III, V) efficiently and quickly, which is of great significance to the rapid and efficient removal of inorganic arsenic. The method can effectively improve the removal effect of As(III) and As(V), and the operation process is simple and the processing time is short

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
  • Efficient and rapid removal of as(iii) or as(v) based on magnetic core-shell bimetallic MOF
  • Efficient and rapid removal of as(iii) or as(v) based on magnetic core-shell bimetallic MOF
  • Efficient and rapid removal of as(iii) or as(v) based on magnetic core-shell bimetallic MOF

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Example 1 Preparation of magnetic core-shell bimetallic MOF material

[0030] Add 0.05 g of Fe3O4 nanoparticles into a beaker containing 2 g of polyvinylpyrrolidone and 30 mL of methanol. After sonicating for 30 minutes, 0.98 g of 2-methylimidazole was added to the mixture, which was then sonicated for another 5 minutes. At the same time, 0.7417 g of zinc nitrate hexahydrate and 0.1455 g of cobalt nitrate hexahydrate were weighed and dissolved in 30 mL of methanol. After mixing the two solutions above, ultrasonically for 5 minutes, transfer to an autoclave, heat at 120°C for 4 hours, wash the resulting solid with methanol three times, and dry it in a vacuum oven at 60°C for 12 hours to obtain a magnetic core-shell Bimetallic MOF materials.

Embodiment 2

[0031] Example 2 Preparation of magnetic core-shell bimetallic MOF-2 material

[0032] Add 0.05 g of Fe3O4 nanoparticles into a beaker containing 2 g of polyvinylpyrrolidone and 30 mL of methanol. After sonicating for 30 minutes, 0.98 g of 2-methylimidazole was added to the mixture, which was then sonicated for another 5 minutes. At the same time, 0.446 g of zinc nitrate hexahydrate and 0.4365 g of cobalt nitrate hexahydrate were weighed and dissolved in 30 mL of methanol. After mixing the two solutions above, ultrasonically for 5 minutes, transfer to an autoclave, heat at 120°C for 4 hours, wash the resulting solid with methanol three times, and dry it in a vacuum oven at 60°C for 12 hours to obtain a magnetic core-shell Bimetallic MOF-2 materials.

Embodiment 3

[0033] Example 3 Preparation of magnetic core-shell bimetallic MOF-3 material

[0034] Add 0.05 g of Fe3O4 nanoparticles into a beaker containing 2 g of polyvinylpyrrolidone and 30 mL of methanol. After sonicating for 30 minutes, 0.98 g of 2-methylimidazole was added to the mixture, which was then sonicated for another 5 minutes. At the same time, 0.801 g of zinc nitrate hexahydrate and 0.087 g of cobalt nitrate hexahydrate were weighed and dissolved in 30 mL of methanol. After mixing the two solutions above, ultrasonically for 5 minutes, transfer to an autoclave, heat at 120°C for 4 hours, wash the resulting solid with methanol three times, and dry it in a vacuum oven at 60°C for 12 hours to obtain a magnetic core-shell Bimetallic MOF-3 materials.

[0035] Depend on figure 1 It can be seen that the magnetic core-shell bimetallic MOF material prepared in Example 1 has both Fe 3 o 4 and the characteristic peaks of bimetallic MOF, indicating that the material is indeed Fe ...

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
concentrationaaaaaaaaaa
Login to View More

Abstract

The present invention relates to a method for efficiently and rapidly removing As(III) or As(V) based on a magnetic core-shell bimetallic MOF. The method is to add a magnetic core-shell bimetallic MOF to a sample containing As(III) or As(V). Materials and potassium hydrogen persulfate solution are kept in a water bath with constant temperature oscillation to complete the removal reaction of As(III) or As(V). The magnetic core-shell bimetallic MOF prepared by the method of the present invention has a certain removal effect on As(III) and As(V), and then the pore size can be significantly increased by adding potassium hydrogen persulfate to cooperate with the magnetic core-shell bimetallic MOF , so that the transformed As(V) can be more easily adsorbed and removed, and can reduce the concentration of arsenic in inorganic arsenic-polluted water sources to meet the drinking water standard (10µg / L) in a short time. In addition, the magnetic core-shell bimetallic MOF can be quickly separated from water by magnets, which overcomes the difficulty of recycling powder materials.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and is suitable for efficient and rapid removal of inorganic arsenic in wastewater, and in particular relates to a method for efficient and rapid removal of As(III) or As(V) based on magnetic core-shell bimetallic MOF. Background technique [0002] Inorganic arsenic (As) is one of the most common heavy metal pollutants, mainly originating from anthropogenic activities such as smelting, mining, application of pesticides and fertilizers, and burning of fossil fuels. Studies have confirmed that overexposure to As can lead to nervous system diseases, organ damage, anemia, etc. At present, arsenic has been listed as one of the important controlled pollutants. Therefore, it is an urgent and urgent problem to find a technology and method that can quickly remove inorganic arsenic from polluted water. [0003] At present, the common removal methods of As(III, V) in water include electrocoagulati...

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): C02F1/72C02F1/48C02F1/28B01J20/22B01J20/28B01J20/30B01J31/16B01J35/02C08G83/00C02F101/10
CPCC02F1/725C02F1/285C02F1/488B01J20/226B01J20/28009B01J20/28014B01J31/1691B01J35/0033B01J35/02C08G83/008C02F2101/103
Inventor 方颖李海普钱宝玉
Owner CENT SOUTH UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com