Sulfonated iron-copper bimetal composite material as well as preparation method and application thereof

A composite material, sulfonated iron-copper technology, applied in the field of environmental remediation, can solve the problems of reduced selectivity of zero-valent iron reaction, low processing efficiency, too fast formation of passivation layer, etc.

Inactive Publication Date: 2021-03-19
HEBEI YUHUAN ENVIRONMENTAL PROTECTION TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Studies have shown that reducing the size of zero-valent iron can increase the utilization and activity of zero-valent iron, but it will lead to a decrease in electronic efficiency; at the same time, it has been found that the composite material of zero-valent iron can slow down the water corrosion of zero-valent iron, thereby improving the zero-valent iron. Reaction selectivity
[0004] CN103979704A discloses a method for treating waste water containing hexavalent chromium with pyrite. The method mainly includes: passing the waste water containing hexavalent chromium with a pH value of 2.0 to 3.0 through coarse-grained pyrite and fine-grained pyrite. Second reduction, so that all the Cr(VI) in the wastewater is reduced to Cr(III), and then the pH of the wastewater is adjusted to be alkaline, so that the Cr(III) is completely precipitated; this method uses Fe 2+ Although the cost is low, the processing ef

Method used

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  • Sulfonated iron-copper bimetal composite material as well as preparation method and application thereof
  • Sulfonated iron-copper bimetal composite material as well as preparation method and application thereof
  • Sulfonated iron-copper bimetal composite material as well as preparation method and application thereof

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Comparison scheme
Effect test

Embodiment 1

[0063] This embodiment provides a preparation method of a sulfonated iron-copper bimetallic composite material, and its specific preparation method is:

[0064] (1) Prepare 200ml of 2mmol / L copper salt solution, use inert gas helium to purge to remove dissolved oxygen in the solution, and seal the solution system;

[0065] (2) Add 1 g of micron-sized iron powder to the system in step (1), and heat it in a water bath shaker for 30 minutes at a temperature of 25 ~ 30 °C and a stirring speed of 200 rpm;

[0066] (3) Vacuum filter the mixed solution after the reaction described in step (2) using a 0.22 μm water-based filter membrane to obtain a filter residue, which is vacuum freeze-dried to obtain an iron-copper bimetallic material;

[0067] (4) Configure pH = 6 acetic acid buffer solution, and pass inert gas argon to remove dissolved oxygen in the solution, and seal the solution system;

[0068] (5) Add 0.5g of the iron-copper bimetal produced in step (3) to the system in step ...

Embodiment 2

[0073] This embodiment provides a preparation method of a sulfonated iron-copper bimetallic composite material, and its specific preparation method is:

[0074] (1) Prepare 200ml of 6mmol / L copper salt solution, purge with inert gas argon to remove dissolved oxygen in the solution, and seal the solution system;

[0075] (2) Add 1 g of micron-sized iron powder to the system in step (1), and heat it in a water bath shaker for 30 minutes at a temperature of 25 ~ 30 °C and a stirring speed of 200 rpm;

[0076] (3) Vacuum filter the mixed solution after the reaction described in step (2) using a 0.22 μm water-based filter membrane to obtain a filter residue, which is then dried to obtain an iron-copper bimetallic material;

[0077] (4) Configure pH = 6 acetic acid buffer solution, and pass inert gas nitrogen to remove dissolved oxygen in the solution, and seal the solution system;

[0078] (5) Add 0.5g of the iron-copper bimetal produced in step (3) to the system in step (4), and ...

Embodiment 3

[0082] This embodiment provides a preparation method of a sulfonated iron-copper bimetallic composite material, and its specific preparation method is:

[0083] (1) Prepare 200ml of 8mmol / L copper salt solution, purge with inert gas nitrogen to remove dissolved oxygen in the solution, and seal the solution system;

[0084] (2) Add 1 g of micron-sized iron powder to the system in step (1), and heat it in a water bath shaker for 30 minutes at a temperature of 25 ~ 30 °C and a stirring speed of 200 rpm;

[0085] (3) Vacuum filter the mixed solution after the reaction described in step (2) using a 0.22 μm water-based filter membrane to obtain a filter residue, which is then dried to obtain an iron-copper bimetallic material;

[0086] (4) Configure pH = 6 acetic acid buffer solution, and pass inert gas helium to remove dissolved oxygen in the solution, and seal the solution system;

[0087] (5) Add 0.5g of the iron-copper bimetal produced in step (3) to the system in step (4), and...

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Abstract

The invention provides a sulfonated iron-copper bimetal composite material as well as a preparation method and application thereof. The sulfonated iron-copper bimetal composite material is micron-sized particles, the theoretical mass ratio of copper to iron is (0-0.125):1, the theoretical molar ratio of sulfur to iron is (0-0.140):1, and the sulfonated iron-copper bimetal composite material has alarge specific surface area and a good reduction effect. The preparation method for the sulfonated iron-copper bimetal composite material mainly comprises a replacement reaction step and a reaction step of enabling ferrous sulfide generated by iron and sulfur coprecipitation to be attached to the surface of the material so as to replace an oxide layer on the surface of the material. Compared withoriginal iron powder, the composite material has the advantage that the activity of the original iron powder is greatly improved; and compared with iron-copper bimetal, the composite material has theadvantage that the reduction effect is better; and in the preparation process of the composite material, due to the generation of the ferrous sulfide, the reduction effect of iron powder on hexavalentchromium is greatly improved, and the preparation method is an efficient and economical preparation method.

Description

technical field [0001] The invention belongs to the field of environmental restoration, and in particular relates to a sulfonated iron-copper bimetallic composite material and a preparation method and application thereof. Background technique [0002] Hexavalent chromium (Cr(VI)) is a common pollutant in soil and groundwater. Commonly found in wastewater from electroplating, metal finishing, pigment manufacturing, tanneries and chrome mining operations. Hexavalent chromium is carcinogenic to humans and animals, and it can cause dermatitis, rhinitis, and even lung and nasopharyngeal cancer. In the aqueous environment, due to the high mobility of Cr(VI), there may be increased exposure and hazards to human health and the environment. In contrast, trivalent chromium Cr(III) has low mobility in the environment and low toxicity; in addition, Cr(III) is also a nutrient required by humans and animals, so reducing Cr(VI) Cr(III) is environmentally favorable and can be used to rem...

Claims

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Application Information

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IPC IPC(8): B22F9/24B22F1/00B22F1/02C02F1/461C02F1/467C02F1/70C02F101/22C02F103/06
CPCB22F9/24C02F1/46176C02F1/4678C02F1/4676C02F1/70C02F1/705C02F2101/22C02F2103/06B22F1/145B22F1/16
Inventor 王源刘星海陈辉霞张奇屈敏刘晓东徐红彬陈盟
Owner HEBEI YUHUAN ENVIRONMENTAL PROTECTION TECH CO LTD
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