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Preparation method of iron-sludge based biological carbon micro-electrolysis filler and application of iron-sludge based biological carbon micro-electrolysis filler to treatment of uranium-containing wastewater

A technology of biological carbon and micro-electrolysis, which is applied in water/sludge/sewage treatment, water/sewage treatment, radioactive pollutants, etc., can solve the problems of easy hardening, easy passivation, high cost, etc., and achieves simple production methods, Efficient use, good treatment effect

Inactive Publication Date: 2018-04-20
NANHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the technical defects of high cost and easy hardening and passivation of existing iron-carbon fillers, the present invention proposes regularized iron-carbon micro-electrolytic fillers and a preparation method thereof

Method used

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  • Preparation method of iron-sludge based biological carbon micro-electrolysis filler and application of iron-sludge based biological carbon micro-electrolysis filler to treatment of uranium-containing wastewater
  • Preparation method of iron-sludge based biological carbon micro-electrolysis filler and application of iron-sludge based biological carbon micro-electrolysis filler to treatment of uranium-containing wastewater

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Embodiment 1

[0018] The preparation method of the iron-sludge-based bio-carbon micro-electrolysis filler of the present invention uses reducing iron powder and excess sludge-based bio-carbon as raw materials, uses sodium silicate as a binder, and uses non-ferrous heavy metal copper powder and cobalt powder as catalysts. These materials are mixed according to a certain ratio, roasted at a high temperature, and sintered to form a regularized iron-carbon micro-electrolytic material.

[0019] The binder can also use bentonite, or mix sodium silicate and bentonite; the catalyst can also use other non-ferrous heavy metals, such as aluminum or palladium.

Embodiment 2

[0021] The preparation method of the iron-sludge-based bio-carbon micro-electrolysis filler of this embodiment is different from Example 1 in that the mixing ratio of each material is by weight, wherein 40-70 parts of reducing iron powder, and the remaining sludge-based 20-50 parts of biochar, 15-25 parts of sodium silicate or / and bentonite, 5-10 parts of copper powder, and 1-5 parts of cobalt powder. After granulation and drying, sintering is carried out. The final temperature of sintering is 400-900°C.

Embodiment 3

[0023] The preparation method of the iron-sludge-based biochar micro-electrolysis filler of this embodiment differs from Example 1 or Example 2 in that the preparation process of the remaining sludge-based biochar is as follows: from the dehydration room of the sewage treatment plant Dry the remaining sludge after dehydration, crush the sludge, place it in a quartz boat, and roast it in a muffle furnace under anaerobic atmosphere at 300-600°C for two hours, preferably at 400°C. Allow it to cool naturally to room temperature in an oxygen-free atmosphere, take out the sample and grind it through a 120-160 mesh sieve in a mortar, preferably 150 mesh.

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Abstract

The invention relates to a method for treating uranium-containing wastewater through an iron-carbon micro-electrolysis method and preparation of filler. According to a preparation method of iron-sludge based biological carbon micro-electrolysis filler, reducing iron powder and residual sludge-based biological carbon are used as raw materials, sodium silicate or / and bentonite is / are used as a binding agent, and nonferrous heavy metal copper powder and cobalt powder are used as catalysts; the materials are mixed according to a certain ratio, are roasted at high temperature and are sintered to form a regularized iron and carbon micro-electrolysis material. By adopting the method provided by the invention, the defects that existing iron and carbon filler has high cost and is easy to harden andpassivate are overcome; the uranium-containing wastewater is creatively treated by utilizing the iron and carbon micro-electrolysis filler.

Description

technical field [0001] The invention relates to a method for treating uranium-containing wastewater by an iron-carbon micro-electrolysis method and preparation of filler thereof, in particular to a preparation of resource-based iron-carbon micro-electrolysis filler and a method for efficiently treating uranium-containing wastewater by using the filler. Background technique [0002] With the rapid economic development, my country's demand for nuclear energy continues to increase. The vigorous development of nuclear energy will inevitably produce a large amount of uranium-containing wastewater, which poses a huge threat to humans and the natural environment. The sources of uranium-containing wastewater include uranium mine wastewater and wastewater discharged from post-processing plants, seepage of uranium tailings and groundwater contaminated by uranium tailings, partial discharge of uranium-containing wastewater from nuclear power plants, laboratories and factories, and vari...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/461G21F9/06
CPCC02F1/46176C02F2101/006G21F9/06
Inventor 吴晓燕于守富张晓文李密
Owner NANHUA UNIV
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