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Reusable modified porous ceramic material based sewage treatment method

A sewage treatment method and porous ceramic technology, which are applied in water/sewage treatment, adsorbed water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of difficult heavy metal sewage treatment, high treatment cost, and low treatment efficiency. , to achieve good treatment effect, improve adsorption treatment efficiency, low cost effect

Active Publication Date: 2018-11-02
DALIAN UNIV OF TECH
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Problems solved by technology

[0005] Aiming at the disadvantages of difficult heavy metal sewage treatment, low treatment efficiency and high treatment cost, the present invention innovatively develops a sewage treatment method based on reusable modified porous ceramic materials, which can greatly improve the adsorption treatment efficiency of heavy metal sewage, And the porous ceramic material after adsorbing heavy metals can be regenerated by high-temperature calcination, modified and adsorbed again, and has the advantages of low cost, high efficiency and no secondary pollution

Method used

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  • Reusable modified porous ceramic material based sewage treatment method

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Embodiment 1

[0031] Implementation example 1, using this patented technology to carry out the treatment of chromium-containing sewage.

[0032] A kind of industrial wastewater, in which the chromium content is about 10mg / L, mainly exists in the form of dichromate ion, the total amount is 10 tons, and the chromium content is about 100g. Select 110kg of porous ceramics made of corundum, with an open porosity of 75%, resistant to strong acid corrosion, in the form of particles with an average diameter of about 5 mm, and washed for later use. Prepare 100 L of sulfuric acid solution with a concentration of 2.6 mol / L, and dissolve 20 kg of starch and 10 kg of dextrin in the aforementioned sulfuric acid solution to form a porous ceramic modification solution. Soak the prepared granular porous ceramics in the aforementioned modification solution, maintain the water temperature of the solution at 65° C., and keep stirring to modify the porous ceramics for 80 minutes. Then take out the modified por...

Embodiment 2

[0033] Implementation example 2, using this patented technology to carry out the treatment of nickel-containing wastewater.

[0034] A kind of industrial wastewater, the nickel content of which is about 20mg / L, mainly exists in the form of nickel ions, and the total amount is 1 ton, so the nickel content is about 20g. Select 22kg of porous ceramics made of corundum and cordierite, with an open porosity of 70%, resistant to strong alkali corrosion, in the shape of a ring with a diameter of about 3 cm, and wash it for later use. Configure 20 L of sulfuric acid solution with a concentration of 3.0 mol / L, and dissolve 2 kg of dextrin, 2 kg of fish skin gelatin, and 2 kg of chitosan gel in the aforementioned sulfuric acid solution to form a porous ceramic modification solution. Soak the prepared ring-shaped porous ceramics in the aforementioned modification solution, keep the water temperature of the solution at 60° C., and keep stirring to carry out the modification treatment of t...

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Abstract

The invention provides a reusable modified porous ceramic material based sewage treatment method. The porous surface of modified porous ceramic is coated with an organic connection adsorbent, and theconnection adsorbent refers to one or combination of starch, dextrin, animal gelatin, algae gel, chitosan gel and glucosyl resin gel. An application process includes: selecting an appropriate porous ceramic material; modifying, and coating with the connection adsorbent; subjecting modified porous ceramic to heavy metal sewage adsorption treatment; subjecting the saturated modified porous ceramic to high-temperature calcination regeneration treatment after heavy metal adsorption; subjecting ash heavy metal substances to safety treatment; subjecting the porous ceramic material to re-modificationtreatment and recycling. By adoption of the method, pollutants such as heavy metals can be efficiently transferred out of a water environment to form solid substances, the size is sharply reduced, and recycling or safety treatment is performed to avoid secondary pollution; the porous ceramic material is recyclable, and energy saving, high efficiency and environmental friendliness are realized.

Description

technical field [0001] The invention belongs to the field of environmental protection, and relates to a sewage treatment method based on reusable modified porous ceramic materials, especially suitable for the treatment of heavy metal sewage, and the porous ceramics can be repeatedly modified and recycled. Background technique [0002] Sewage containing heavy metals has always been a problem in the field of environmental protection. Because heavy metals are not degradable, it is often difficult and costly to treat. Among them, adsorption treatment is a relatively simple and easy heavy metal sewage treatment method. Common heavy metal sewage adsorption treatment agents include activated carbon, clay, resin, nanomaterials, etc. These adsorption treatment agents for heavy metal sewage have their own advantages and disadvantages. They often have disadvantages such as low adsorption capacity, difficult regeneration, and difficulty in recycling. Improper treatment may even cause se...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/28C02F101/20
CPCC02F1/281C02F2101/20C02F2303/16
Inventor 游奎周子晗张雨雨苏少帅陈泽文钟喆马彩华董婧张芳朱玲王振宇刘心田罗琦万磊徐国淞
Owner DALIAN UNIV OF TECH
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