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Coated iron-carbon composite material, preparation method, modification method and sewage treatment method

A sewage treatment method and composite material technology, applied in the field of coating, can solve problems such as low compressive strength, and achieve the effects of increased strength, good barrier effect, and strong processing capacity

Active Publication Date: 2022-03-22
BCEG ENVIRONMENTAL REMEDIATION CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Therefore, the first technical problem to be solved by the present invention is to overcome the problem of low compressive strength of iron-carbon materials in the prior art, thereby providing a coated iron-carbon composite material and its preparation method

Method used

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  • Coated iron-carbon composite material, preparation method, modification method and sewage treatment method
  • Coated iron-carbon composite material, preparation method, modification method and sewage treatment method
  • Coated iron-carbon composite material, preparation method, modification method and sewage treatment method

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Embodiment 1

[0065] This embodiment provides a coated iron-carbon composite material, including 500 g of iron-carbon material and 20 g of coated polyethylene wrapped on its surface;

[0066] Among them, the iron-carbon material component includes 375g of iron powder, 100g of activated carbon powder, and 25g of sodium alginate powder.

[0067] This embodiment also provides a method for preparing the above-mentioned coated iron-carbon composite material, including the following steps:

[0068] (1) Preparation of iron-carbon material:

[0069] Preparation of pickling iron powder: Grind 500g of reduced iron powder to 200 mesh, place in 1000mL0.1 mol / L hydrochloric acid, stir for 5min, filter under reduced pressure, wash with deionized water until the pH value of the filtrate is 7.2, and vacuum oven at 50°C Dry for 2 hours and store in an oxygen-free environment.

[0070] Cross-linking and solidification: Grind the biological activated carbon to 200 mesh to obtain activated carbon powder. Ta...

Embodiment 2

[0078] This embodiment provides a coated iron-carbon composite material, including 465g of iron-carbon material and 46g of coated polyurethane DP3070A coated on its surface;

[0079] Wherein, the iron-carbon material component includes 400 g of iron powder, 50 g of graphite powder, and 15 g of sodium alginate powder.

[0080] This embodiment also provides a method for preparing the above-mentioned coated iron-carbon composite material, including the following steps:

[0081] (1) Preparation of iron-carbon material:

[0082] Preparation of pickling iron powder: Grind 500g of reduced iron powder to 400 mesh, place in 1000mL of 0.05mol / L sulfuric acid, stir for 4 minutes, filter under reduced pressure, wash with deionized water until the pH of the filtrate is 7.3, and place in a vacuum oven at 50°C Dry for 2 hours and store in an oxygen-free environment;

[0083] Cross-linking and solidification: Grinding graphite to 400 mesh to obtain graphite powder. Take 400g of dry picklin...

Embodiment 3

[0091] This embodiment provides a coated iron-carbon composite material, including 380g of iron-carbon material and coating material epoxy resin CYD-014U11g wrapped on its surface;

[0092] Wherein, the iron-carbon material component includes 200 g of iron powder, 150 g of activated carbon powder, and 30 g of sodium alginate powder.

[0093] This embodiment also provides a method for preparing the above-mentioned coated iron-carbon composite material, including the following steps:

[0094] (1) Preparation of iron-carbon material:

[0095] Preparation of pickling iron powder: Grind 500g of reduced iron powder to 300 mesh, place in 1000mL of 0.5mol / L nitric acid, stir for 3 minutes, filter under reduced pressure, wash with deionized water until the pH of the filtrate is 7.1, and place in a vacuum oven at 50°C Dry for 3 hours and store in an oxygen-free environment;

[0096] Cross-linking and solidification: Grind the bioactivated carbon to 300 mesh to obtain activated carbon ...

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Abstract

The invention relates to the technical field of coating, in particular to a coated iron-carbon composite material, a preparation method, a modification method and a sewage treatment method thereof. The coated iron-carbon composite material comprises an iron-carbon material and a coating material coated on the surface of the iron-carbon material. The coating material can obviously improve the strength of the iron-carbon material, so that the stability of the iron-carbon material in the mixing, transportation and placement processes is improved.

Description

technical field [0001] The invention relates to the field of coating technology, in particular to a coated iron-carbon composite material, a preparation and modification method, and a sewage treatment method. Background technique [0002] Zero-valent iron has active chemical properties and strong reducing ability. A large number of studies have shown that zero-valent iron can not only degrade chlorinated organic compounds in water, but also reduce and remove heavy metals, azo dyes, nitroaromatics, nitrates, and high chlorine. This greatly promotes the application of zero-valent iron in environmental pollution control. Because of its low cost, it is often used as a filler or injectant in permeable reactive walls and in-situ injection techniques. However, with the reaction of zero-valent iron, hydroxides are gradually deposited on the surface of iron, blocking the internal iron powder from participating in the reaction, weakening the oxidation-reduction reaction, and reducing...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/102C02F1/461
CPCC02F1/46176
Inventor 王祺李嘉晨熊静郭丽莉张孟昭李亚秀李书鹏李博
Owner BCEG ENVIRONMENTAL REMEDIATION CO LTD
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