Nano zero valent iron @ molecular sieve composite material and preparation method and applications thereof

A nano-zero-valent iron and composite material technology, applied in chemical instruments and methods, adsorbed water/sewage treatment, water pollutants, etc. Air contact, many active sites, avoid contact oxidation effect

Inactive Publication Date: 2019-11-15
WUHAN UNIV OF SCI & TECH
View PDF6 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these materials have certain limitations respectively. For example, the adsorbents prepared by modifying industrial and agricultural wastes have little abili

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
  • Nano zero valent iron @ molecular sieve composite material and preparation method and applications thereof
  • Nano zero valent iron @ molecular sieve composite material and preparation method and applications thereof
  • Nano zero valent iron @ molecular sieve composite material and preparation method and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] The preparation method is as follows:

[0047] (1) Prepare a ferrous sulfate solution with a concentration of 1mol / L and a pH value of 3.0, add pretreated molecular sieve NaY to the iron salt solution according to the mass ratio of iron to molecular sieve 1:0.2, and mechanically stir under nitrogen protection 2h to exchange iron ions into molecular sieves to obtain a mixture A of iron salts and molecular sieves.

[0048] (2) Suction filtration of the mixed solution A for solid-liquid separation, rinse the separated solid twice with deionized water, transfer the solid to a three-necked flask, and add 40 mL of distilled water to the three-necked flask to obtain a mixed reaction solution , under the conditions of nitrogen protection and mechanical stirring, in the three-necked flask, the material ratio of iron and reducing agent is 1:2, and the sodium borohydride solution of 1mol / L is uniformly dropped into the mixed reaction solution, and after the dropwise addition is co...

Embodiment 2

[0055] (1) Prepare a ferrous chloride solution with a concentration of 0.5mol / L and a pH value of 3.1, add pretreated molecular sieve NaY to the iron salt solution at a mass ratio of iron to molecular sieve of 1:1, and under nitrogen protection Stir mechanically for 3 hours to exchange iron ions into molecular sieves to obtain a mixture A of iron salts and molecular sieves.

[0056] (2) Suction filtration of the mixed solution A for solid-liquid separation, rinse the separated solid with deionized water for 3 times, transfer the solid to a three-necked flask, and add 30 mL of distilled water to the three-necked flask to obtain a mixed reaction solution , under the conditions of nitrogen protection and mechanical stirring, in the three-necked flask, the material ratio of iron and reducing agent is 1:2, and the sodium borohydride solution of 0.5mol / L is uniformly dropped into the mixed reaction solution, and the dropwise addition After that, the mechanical stirring was continued...

Embodiment 3

[0060] (1) Prepare a ferric sulfate solution with a concentration of 0.2mol / L, add pretreated molecular sieve NaA to the iron salt solution at a mass ratio of iron to molecular sieve of 1:5, and mechanically stir for 4 hours to exchange iron ions into molecular sieves to obtain Mixture A of iron salt and molecular sieve.

[0061] (2) Suction filtration of the mixed solution A for solid-liquid separation, rinse the separated solid with deionized water for 3 times, transfer the solid to a three-necked flask, and add 50 mL of distilled water to the three-necked flask to obtain a mixed reaction solution , under the conditions of nitrogen protection and mechanical stirring, in the three-necked flask, the material ratio of iron and reducing agent is 1:3, and the sodium borohydride solution of 0.4mol / L is uniformly dripped into the mixed reaction solution, and after adding After that, the mechanical stirring was continued for 35 minutes to obtain the mixed solution B.

[0062] (3) S...

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
Particle sizeaaaaaaaaaa
Adsorption capacityaaaaaaaaaa
Adsorption capacityaaaaaaaaaa
Login to view more

Abstract

The invention relates to a nano zero valent iron @ molecular sieve composite material and a preparation method and applications thereof. The preparation method comprises following steps: preparing aniron salt solution; adding molecular sieves into the iron salt solution; mechanically stirring the iron salt solution under the protection of nitrogen so as to introduce iron ions into the molecular sieves to obtain a mixed solution (A) containing molecular sieves and iron salts; subjecting the mixed solution (A) to solid-liquid separation; after separation, mixing the solids with water to obtaina mixed reaction solution; under the protection of nitrogen and mechanical stirring, adding a solution of a reducing agent into the mixed reaction solution, keeping on stirring to obtain a mixed solution (B); subjecting the mixed solution (B) to solid-liquid separation; and finally washing and drying the obtained solids after separation to obtain the nano zero valent iron @ molecular sieve composite material. The synthesized nano zero valent iron @ molecular sieve composite material has a cation exchange function of molecular sieves and an adsorption-reduction function of nano zero valent ironand has a good effect on removing cations of heavy metals such as Pb<2+>, Cu<2+>, etc. and anions such as ions of arsenous acid.

Description

technical field [0001] The invention belongs to the technical field of composite material preparation, and specifically relates to a nanometer zero-valent iron@molecular sieve composite material and its preparation method and application. Background technique [0002] Heavy metals are the most serious pollutants to the environment and the most harmful to human beings. Mine mining, metal smelting and processing, electroplating, tanning, pesticides, papermaking, paint, printing and dyeing, nuclear technology and petrochemical industries all produce wastewater containing heavy metals, some of which also contain lead, arsenic, zinc, copper, Various heavy metal ions such as cadmium, nickel, mercury, etc. Heavy metals are highly toxic, difficult to be biodegraded, and easy to bioaccumulate. eliminate. At present, the treatment methods of heavy metal wastewater at home and abroad mainly include chemical precipitation, redox, adsorption, ion exchange, membrane separation and elect...

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): C02F1/28C02F1/70C02F101/10C02F101/20C02F101/22
CPCC02F1/281C02F1/288C02F1/705C02F2101/20C02F2101/103C02F2101/22
Inventor 刘冰雪刘红范先媛李志学
Owner WUHAN UNIV OF SCI & TECH
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