Supercharge Your Innovation With Domain-Expert AI Agents!

Sulfur modified iron-manganese bimetallic oxide and preparation method and application thereof

A double metal oxide and sulfur modification technology, which is applied to chemical instruments and methods, water pollutants, and other chemical processes, can solve the problems of adsorption rate, adsorption affinity and adsorption capacity to be further improved, and achieve good removal effect , the effect of increasing the adsorption rate

Active Publication Date: 2019-03-22
NANJING UNIV OF SCI & TECH
View PDF7 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the adsorption rate, adsorption affinity and adsorption capacity of traditional iron-manganese bimetallic oxides for arsenic and antimony still need to be further improved.

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
  • Sulfur modified iron-manganese bimetallic oxide and preparation method and application thereof
  • Sulfur modified iron-manganese bimetallic oxide and preparation method and application thereof
  • Sulfur modified iron-manganese bimetallic oxide and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040]At room temperature, under nitrogen protection, dissolve 0.06mol of ferrous sulfate heptahydrate and 0.02mol of manganese acetate in 500mL of deionized water, stir them with magnetic force to completely dissolve, then add 1mol / L NaOH solution to adjust the pH to 7~ 8. After stirring vigorously for 30 minutes, add 0.002 mol of sodium dithionite, continue to stir and react for 12 hours, centrifuge the reacted suspension at 8000r / min for 5 minutes, wash the precipitate repeatedly with anaerobic deionized water and absolute ethanol, and place in a vacuum Dry in a drying oven at 60°C to constant weight, grind and sieve to obtain a sulfur-modified iron-manganese bimetallic oxide, wherein the molar ratio of S:Fe:Mn is 0.2:3:1, which is recorded as 0.2S-Fe- Mn (Fe:Mn=3:1). The preparation method of the iron-manganese double metal oxide material without adding sodium dithionite is the same as above, which is recorded as Raw Fe-Mn (Fe:Mn=3:1).

[0041] Table 1. Kinetic parameter...

Embodiment 2

[0047] At room temperature, 0.03 mol of ferrous sulfate heptahydrate and 0.01 mol of manganese acetate were dissolved in 200 mL of deionized water under the protection of nitrogen, and magnetically stirred to completely dissolve, and then ammonia solution was added to adjust the pH to 7-8. After stirring vigorously for 30 minutes, add 0.03 mol of sodium sulfide, continue to stir the mixed solution at 90°C for 24 hours, centrifuge the reacted suspension at 8000r / min for 5 minutes, and then use anaerobic deionized water and absolute ethanol repeatedly Wash, place in a vacuum drying oven at 60°C and dry to constant weight, grind and sieve to obtain a black deposit that is a sulfur-modified iron-manganese double metal oxide, wherein the molar ratio of S:Fe:Mn is 3:3: 1, recorded as 3S-Fe-Mn (Fe:Mn=3:1). The preparation method of the iron-manganese double metal oxide material without adding sodium bisulfide is the same as that in Example 1, which is recorded as Raw Fe-Mn (Fe:Mn=3:1...

Embodiment 3

[0054] At room temperature, under nitrogen protection, dissolve 0.10mol of ferrous chloride and 0.01mol of manganese nitrate in 200mL of deionized water, stir them with magnetic force to completely dissolve, then add 1mol / L of KOH solution to adjust the pH at 7-8 . After stirring vigorously for 30 minutes, add 0.01 mol of sodium dithionite, continue to stir the mixed solution at room temperature for 48 hours, transfer the reacted suspension to centrifuge at 8000r / min for 5 minutes, and then use anaerobic deionized water and absolute ethanol Wash repeatedly, dry in a vacuum drying oven at 60°C to constant weight, grind and sieve to obtain black deposits that are sulfur-modified iron-manganese double metal oxides, wherein the molar ratio of S:Fe:Mn is 2:10 :1, recorded as 2S-Fe-Mn (Fe:Mn=10:1). The preparation method of the iron-manganese double metal oxide material without adding sodium dithionite is the same as above, which is recorded as Raw Fe-Mn (Fe:Mn=10:1).

[0055] Tab...

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
Adsorption rateaaaaaaaaaa
Adsorption rateaaaaaaaaaa
Adsorption rateaaaaaaaaaa
Login to View More

Abstract

The invention discloses a sulfur modified iron-manganese bimetallic oxide and a preparation method and application thereof. The method comprises the following steps: dissolving iron salt and manganesesalt in water under protection of nitrogen, regulating the pH of a solution to be 7-8, then adding a sulfur source, and reacting to obtain a sulfur modified iron-manganese bimetallic oxide material.The preparation method is simple, the cost is low, compared with an unmodified material, the prepared sulfur modified iron-manganese bimetallic oxide material has the advantages that the adsorption rate, adsorption affinity and adsorption capacity to arsenium and antimony are greatly increased, and moreover, a good removal effect for low-concentration arsenium and antimony wastewater is also achieved.

Description

technical field [0001] The invention relates to a sulfur-modified iron-manganese double metal oxide and a preparation method thereof, and the application of arsenic and antimony in adsorbing waste water, belonging to the technical field of environmental functional materials. Background technique [0002] Arsenic is a toxic heavy metal that exists in nature and is listed as a class I carcinogen. Antimony and arsenic belong to group VA, and they have similar physical and chemical properties and toxicity. Antimony is carcinogenic to the human body and can damage the nervous system, digestive system and immune system of the human body. The United States Environmental Protection Agency and the European Union have identified antimony as a priority pollutant and stipulated the critical value of antimony pollution in drinking water. my country's drinking water hygiene standard GB5749-2006 stipulates that the antimony content limit is 5 μg / L. Therefore, it is of great significance...

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
IPC IPC(8): B01J20/06B01J20/30C02F1/28C02F101/20
CPCB01J20/045B01J20/06C02F1/281C02F2101/20C02F2101/103
Inventor 孙秀云李桥王连军李瑞韩卫清李健生沈锦优刘晓东梅晓杰
Owner NANJING UNIV OF SCI & TECH
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com