Activated charcoal loaded nano zero-valent iron material

A nano-zero-valent iron and activated carbon technology, applied in water/sludge/sewage treatment, metal/metal oxide/metal hydroxide catalyst, water pollutants, etc., can solve the problem of difficult reuse and recycling, easy deactivation and agglomeration, increasing processing costs and other issues, to achieve the effect of excellent adsorption, strong reduction, and good technical support

Active Publication Date: 2014-04-16
WENZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Nano-iron can reduce nitro groups to amino groups and nitrate nitrogen to ammonia nitrogen, thereby improving oxidizability and biodegradability. However, the powdered nano-iron particles are extremely fine and easy to deactivate and agglomerate in water, making it difficult to reuse And recycling, solid-liquid separation may be required for the next step of treatment, which further increases the cost of treatment and limits its application in environmental remediation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0020] Add 0.5g of activated carbon into 50mL of 0.05mol / L FeSO4·7H2O solution, and place it in a constant temperature oscillator for 30min at room temperature (25°C) to make it fully adsorbed. Then, slowly add 0.05 mol / L NaBH4 solution equal to the volume of ferrous sulfate solution, place it in a constant temperature oscillator for 30 minutes to make it fully react, and centrifuge at 2500 rpm for 10 minutes after the reaction is completed. The activated carbon-loaded nano-iron product was separated by centrifugation, and the product was washed 3 times with deionized water degassed by ultrasonic degassing (7min, 60°C, 3000rpm), then washed 3 times with absolute ethanol, and transferred to a vacuum dryer for drying. The Fe content of the activated carbon nanometer zero-valent iron material is 200-2000mg / g.

[0021] Activated carbon-loaded nano-iron has a strong ability to catalyze the degradation of phenol. For example, when the concentration of phenol in water is 40mg / l, the ...

example 2

[0023] Add 0.5g of activated carbon into 50mL of 0.05mol / L FeSO4·7H2O solution, and place it in a constant temperature oscillator for 30min at room temperature (25°C) to make it fully adsorbed. Then, slowly add 0.05 mol / L NaBH4 solution equal to the volume of ferrous sulfate solution, place it in a constant temperature oscillator for 30 minutes to make it fully react, and centrifuge at 2500 rpm for 10 minutes after the reaction is completed. The activated carbon-loaded nano-iron product was separated by centrifugation, and the product was washed 3 times with deionized water degassed by ultrasonic degassing (7min, 60°C, 3000rpm), then washed 3 times with absolute ethanol, and transferred to a vacuum dryer for drying. The Fe content of the activated carbon nanometer zero-valent iron material is 200-2000mg / g.

[0024] Activated carbon-loaded nano-iron has a strong catalytic degradation ability for methyl orange. For example, when the concentration of methyl orange in water is 20m...

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Abstract

The invention relates to an activated charcoal loaded nano zero-valent iron material which is characterized in that the granulated activated charcoal is used as a carrier and has a particle diameter of 0.2-0.45 mm and specific surface area above 1,500 m<2>; a solid loaded inorganic material is nano zero-valent iron particles, the loaded iron is zero-valent Fe; the loaded nano zero-valent iron particle has the size of 1-100 nm, and the content of the Fe is 200-2000 mg / g. The zero-valent iron material provided by the invention not only has the superior adsorption effect of the activated charcoal, strong reducing action of the nano iron, but also can accelerate the reduction reaction as the loading type nano iron takes iron as an anode and C as a cathode to form a primary battery, has a great impact on the catalysis degradation of the contaminant and can provide better technical support for safe control and deep purification of environmental micro contaminant (such as heavy metal ions, macromolecule dye and halogenated organic matters).

Description

technical field [0001] The invention relates to a nanocomposite activated carbon for catalytically degrading environmental micro-pollutants, more specifically to a preparation method and application of a nanometer zero-valent iron material loaded with activated carbon. Background technique [0002] In modern society, the main pollutants in drinking water include soluble heavy metal ions, arsenic ions, trace organic pollutants, disinfection by-products, nitrates, nitrites, and pathogenic bacteria, viruses, and pathogenic microorganisms. Water purification materials mainly include activated carbon, molecular sieve, KDF and nanofiltration membrane. [0003] Adsorption is one of the effective methods to remove pollutants in polluted water. Adsorption is a physical and chemical phenomenon in which the adsorbate is adsorbed to the adsorbent through the van der Waals force, electrostatic force, hydrogen bond and chemical bond between the adsorbate and the adsorbent. In the field ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/745C02F1/70C02F101/34C02F101/38
Inventor 陈威王奇陈友墙许淑林沈莉
Owner WENZHOU UNIVERSITY
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