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Porous foamed ceramic loaded nanometer zero-valent iron composite and preparation method thereof

A nano-zero-valent iron and ceramic loading technology, applied in chemical instruments and methods, water/sludge/sewage treatment, water pollutants, etc., can solve the problems of easy deactivation, difficult recycling and reuse, and easy agglomeration of magnetic properties, etc. problem, to improve the effect of being easily oxidized

Pending Publication Date: 2019-10-08
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides porous foam ceramics loaded nano-zero-valent iron composite material and its preparation method, which solves the existing technical problems that the magnetic properties of nano-zero-valent iron are easy to agglomerate and easily deactivate in water, and are difficult to recycle and reuse

Method used

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  • Porous foamed ceramic loaded nanometer zero-valent iron composite and preparation method thereof
  • Porous foamed ceramic loaded nanometer zero-valent iron composite and preparation method thereof
  • Porous foamed ceramic loaded nanometer zero-valent iron composite and preparation method thereof

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Embodiment 1

[0031] Step 1: Pretreatment of Precursor

[0032] 9.92g of FeSO 4 ·7H 2 O was dissolved in 100mL ethanol water solution (alcohol-water ratio: 2:3), stirred to dissolve, then added 5g of polyethylene glycol PEG-4000 as a dispersant, and at the same time added foam ceramics and then magnetically stirred at a certain speed for 30min to mix evenly. 100mL of NaBH with a concentration of 1mol / L 4 The solution was added dropwise to the solid-liquid mixture at a rate of 3.3 ml / min, and magnetic stirring was continued for 60 minutes after the addition. The dispersion mixture was sonicated for 10 minutes every 20 minutes of stirring.

[0033] Step 2: Hydrothermal Treatment

[0034] Put the solid-liquid mixture containing foam ceramics obtained in step 1 into a 250ml autoclave, control its filling degree within an appropriate range, then put it into a drying oven, and set the hydrothermal treatment temperature to 150°C, and the holding time After 5 hours, after starting to heat up, ...

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Abstract

The invention belongs to the technical field of water treatment materials and in particular relates to a porous foamed ceramic loaded nanometer zero-valent iron composite and a preparation method thereof. The invention provides the preparation method of the porous foamed ceramic loaded nanometer zero-valent iron composite, and the preparation method comprises the steps: dissolving FeSO4.7H2O intoan ethanol aqueous solution, carrying out stirring for dissolution, then, adding a dispersant and foamed ceramics, and carrying out uniform mixing to obtain a solid-liquid mixture, dropwise adding anNaBH4 solution into the solid-liquid mixture, and carrying out ultrasonic dispersion; carrying out a hydrothermal reaction on the solid-liquid mixture, and carrying out washing and drying to obtain afirst sample; annealing the first sample to obtain a second sample; and sintering the second sample at a hydrogen atmosphere, and cooling the second sample to the room temperature to obtain the porousfoamed ceramic loaded nanometer zero-valent iron composite. The invention further provides the porous foamed ceramic loaded nanometer zero-valent iron composite. The technical problem that existing nanometer zero-valent iron is easy to agglomerate and inactivate in water due to magnetic property so as to be difficult to recover and reutilize is solved.

Description

technical field [0001] The invention belongs to the technical field of water treatment materials, and in particular relates to a porous foam ceramic loaded nano-zero-valent iron composite material and a preparation method thereof. Background technique [0002] With the development of industrial production, the discharge of pollutants has gradually deteriorated the environment, especially the problem of heavy metal pollution has become increasingly serious. Heavy metal pollutants mainly include copper, lead, nickel, chromium, mercury, etc., and their main form is the discharge of wastewater containing heavy metal ions. In view of the harm of heavy metal pollution to the environment and human body, the remediation strategy to promote the conversion of heavy metals from unstable parts to stable parts has become a promising technology. Scientists from all over the world have been devoting themselves to the research and development of new materials and technologies to control he...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/70C02F1/28C22C1/10C02F101/20
CPCC02F1/705C02F1/288C22C1/101C22C1/1026C02F2101/20
Inventor 卢敏仪梁波郭劲孟文彬
Owner GUANGDONG UNIV OF TECH
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