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Inorganic composite material, preparation method and application thereof in removing heavy metal ions for sewage treatment

An inorganic composite material, brucite technology, applied in water/sewage treatment, adsorption water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problem of large land occupation of treatment facilities, heavy burden on enterprises, and low removal efficiency and other issues, to achieve the effect of reducing processing costs, reducing floor space, and increasing surface area

Active Publication Date: 2017-12-12
南京乐透思高新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional treatment scheme is mainly to add chemical agents for precipitation. Due to the low removal efficiency, large amount of sludge generated, large area of ​​treatment facilities and difficult maintenance, the treatment cost is high, which has become a heavy burden for related enterprises

Method used

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  • Inorganic composite material, preparation method and application thereof in removing heavy metal ions for sewage treatment
  • Inorganic composite material, preparation method and application thereof in removing heavy metal ions for sewage treatment
  • Inorganic composite material, preparation method and application thereof in removing heavy metal ions for sewage treatment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Example 1: Synthesis of materials

[0029] (1) Mix 100 grams of limestone, 30 grams of magnesite, 30 grams of dolomite, 30 grams of brucite, and 2 grams of apatite, and react in a sealed manner at 450°C for 6 hours;

[0030] (2) Mix the reaction products of step (1) uniformly, fill with air at 200°C, and continue to blow air for 30 minutes;

[0031] (3) The product obtained in step (2) is calcined at a high temperature, the temperature is 750°C, and the calcining time is 30 minutes;

[0032] (4) Fill the calcined product of step (3) with water vapor, and perform hydration at high temperature and high pressure (3 atmospheres, 120°C);

[0033] (5) Subjecting the hydrated product of step (4) to microwave drying treatment;

[0034] (6) The product after the microwave drying treatment is ultrasonically crushed and passed through a 200-screen mesh to obtain the final required material.

[0035] The particle size of the material obtained in the above synthesis step is 10-30 microns, and t...

Embodiment 2

[0036] Example 2: Direct treatment of typical heavy metal sewage

[0037] 1g of the material was added to 100ml of experimental self-made sewage water samples (prepared with heavy metal ions in pure water) containing different heavy metal pollutants, and stirred at room temperature at a uniform speed at 100 revolutions per minute. After 6 hours of stirring and reaction, the main pollutant indicators of the sewage were tested. The main indicators before and after treatment are shown in the following table:

[0038]

[0039] It can be seen from the table that the various indicators of the treated sewage have decreased significantly. With reference to the relevant national environmental protection regulations, the above indicators of the treated sewage meet the requirements of the "People's Republic of China Integrated Wastewater Discharge Standard" (GB8978-1996).

Embodiment 3

[0040] Example 3: Used as a filling material with equipment

[0041] Add 100g of the material into a column with a diameter of 10cm and a length of 15cm. The liquid conveying equipment will circulate 500ml of sewage containing different metals at a rate of 1000 cubic centimeters per hour. The treatment time is 6 hours. The pollutant indicators are tested. The main indicators before and after treatment are shown in the following table:

[0042]

[0043] It can be seen from the table that the various indicators of the treated wastewater have decreased significantly. With reference to the relevant national environmental protection regulations, the above indicators of the treated wastewater all meet the national special limit standards.

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Abstract

The invention discloses an inorganic composite material which is mainly prepared from limestone, magnesite, dolomite, brucite and apatite. The inorganic composite material has a lamellar zeolite-shaped structure; the grain size is 1 micron to 5000 microns; the specific surface area is 200-500m<2> / g. The invention also discloses a preparation method for the composite material and an application thereof in removing heavy metal ions for sewage treatment. A zeolite-like multilayer micro-structure material with higher ion exchange activity on surface is acquired in the manner of combing various materials according to the invention, so that the superficial area of the particle is greatly increased and the ion exchange efficiency is increased. The invention acquires the particle with structure stability and capability of efficiently absorbing heavy metal ions. The particle can be directly used for treating sewage and also can be used as a filling material which is used together with a specific sewage treatment device. Besides, the material contains no environmental pollutant specified by environment competent department and generates no new environmental pollution in the use process.

Description

Technical field [0001] The present invention mainly relates to sewage treatment. Specifically, the present invention relates to an inorganic composite material, a preparation method and its use for removing heavy metal ions in sewage treatment. Background technique [0002] Heavy metal ions are the key objects of industrial wastewater treatment. The traditional treatment scheme is mainly to add chemical agents for precipitation. Due to the low removal efficiency, the large amount of sludge generated, the large area of ​​the treatment facility, and the difficulty of maintenance, the treatment cost is high, which has become a heavy burden for related enterprises. Therefore, new technical products are needed for the intensive treatment of heavy metal ions, improve treatment efficiency, reduce sludge output, compress treatment processes, simplify treatment facilities, and ultimately achieve the goal of reducing treatment costs. Summary of the invention [0003] In order to solve the...

Claims

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Application Information

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IPC IPC(8): B01J20/04B01J20/30B01J39/09C02F1/42C02F1/28C02F101/20C02F101/22
CPCB01J20/041B01J20/043B01J20/048B01J39/09B01J2220/42B01J2220/4806C02F1/281C02F1/42C02F2101/20C02F2101/22
Inventor 朱阳光
Owner 南京乐透思高新材料科技有限公司
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