Zero-valent iron-iron copper microelectrolysis filler and preparation method thereof

A technology of zero-valent iron and micro-electrolysis, applied in chemical instruments and methods, water/sewage treatment, water/sludge/sewage treatment, etc., can solve problems such as compaction, improve packing compaction, efficient wastewater treatment capacity, reduce The effect of contact

Inactive Publication Date: 2018-07-06
HAITIAN WATER GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the problem of serious compaction of the fixed bed system of zero-valent iron in the prior art, and provides a zero-valent iron-iron-copper micro-electrolytic filler, which can effectively solve the problem of serious compaction of the filler, improve wastewater treatment efficiency and reduce wastewater treatment cost

Method used

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  • Zero-valent iron-iron copper microelectrolysis filler and preparation method thereof
  • Zero-valent iron-iron copper microelectrolysis filler and preparation method thereof
  • Zero-valent iron-iron copper microelectrolysis filler and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A zero-valent iron-iron-copper micro-electrolytic filler, comprising zero-valent iron and iron-copper uniformly mixed with a mass ratio of 1:1; the zero-valent iron is zero-valent iron with an average particle size of 100 μm after derusting, cleaning and drying pink.

[0037] Its preparation method specifically comprises the following steps:

[0038] Step A: Preparation of Iron Copper

[0039] Use deionized water to prepare a plating solution with a copper sulfate concentration of 20 g / L and a disodium edetate concentration of 7 g / L, and place the zero-valent iron powder with an average particle size of 100 μm after derusting, cleaning and drying In the plating solution, react at 30°C for 10 min at a stirring speed of 250 rpm to form a uniform and dense copper layer on the surface of zero-valent iron to obtain iron-copper.

[0040] Step B: Wash and Dry

[0041] The iron-copper obtained in step A is cleaned with deionized water to remove the plating solution on the su...

Embodiment 2

[0060] A zero-valent iron-iron-copper micro-electrolytic filler, comprising zero-valent iron and iron-copper whose mass ratio is 3:1 and uniformly mixed; said zero-valent iron is zero-valent iron with an average particle diameter of 2mm after derusting, cleaning and drying particles.

[0061] Its preparation method specifically comprises the following steps:

[0062] Step A: Preparation of Iron Copper

[0063] With deionized water preparation cupric chloride concentration is that 42 g / L and sodium citrate concentration are the plating solution of 46 g / L, and the zero-valent iron particle of mean particle diameter 2mm after derusting cleaning and drying is placed in plating solution , reacted at 50°C for 30 minutes at a stirring speed of 250 rpm to form a uniform and dense copper layer on the surface of zero-valent iron particles to obtain iron-copper.

[0064] Step B: Wash and Dry

[0065] Wash the iron and copper obtained in step A with distilled water to remove the platin...

Embodiment 3

[0069] A zero-valent iron-iron-copper micro-electrolytic filler, comprising zero-valent iron and iron-copper uniformly mixed with a mass ratio of 0.3:1; the zero-valent iron is zero-valent iron with an average particle diameter of 100 μm after derusting, cleaning and drying pink.

[0070] Its preparation method specifically comprises the following steps:

[0071] Step A: Preparation of Iron Copper

[0072] Use deionized water to prepare a plating bath whose copper sulfate concentration is 2 g / L and sodium tartrate concentration is 7 g / L, and place the zero-valent iron powder with an average particle diameter of 100 μm after derusting, cleaning and drying in the plating bath. A uniform and dense copper layer was formed on the surface of the zero-valent iron powder by reacting at 5°C for 20 minutes at a stirring speed of 300 rpm to obtain iron-copper.

[0073] Step B: Wash and Dry

[0074] Wash the iron and copper obtained in step A with distilled water to remove the plating ...

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Abstract

The invention discloses zero-valent iron-iron copper microelectrolysis filler, which comprises zero-valent iron and iron copper that are mixed uniformly, wherein the iron copper is zero-valent iron coated with a dense copper layer on the surface. The invention further discloses a preparation method of the zero-valent iron-iron copper microelectrolysis filler. The preparation method comprises the following steps of: (1) coating the surface of the zero-valent iron with the dense copper layer to prepare the iron copper, (2) performing cleaning and drying, and (3) mixing to obtain the filler. Thezero-valent iron-iron copper microelectrolysis filler can effectively solve the problem of serious filler hardening, improves waste water treatment efficiency and lowers waste water treatment cost; the preparation method of the zero-valent iron-iron copper microelectrolysis filler is simple in technology; the filler is low in cost; and the prepared microelectrolysis filler is long in service lifeand facilitates effectively lowering the waste water treatment cost.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to a zero-valent iron-iron-copper micro-electrolytic filler and a preparation method thereof. Background technique [0002] Zero-valent iron-based fixed-bed systems have been widely used in groundwater remediation and wastewater treatment. Iron-based materials can effectively remove inorganic ions such as inorganic salts and heavy metals in water, and can effectively transform organic substances in water, reducing their toxicity or improving their biodegradability. At the same time, in order to further improve the treatment effect, the iron-based micro-electrolytic system (such as Fe 0 / Cu 0 Micro-electrolysis system, Fe 0 / Ni 0 Micro-electrolysis system, Fe 0 / C micro-electrolysis system, etc.) were developed and applied to fixed beds. These methods use the high electrode potential difference between the zero-valent iron and the transition metal (or c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/461
CPCC02F1/46104
Inventor 赖波任逸邱恋潘志成汪锐陈婷婷杨开虎陈琪璇
Owner HAITIAN WATER GRP CO LTD
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