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Porous composite material for removing low-concentration benzene series and its preparation method

A technology of porous composite materials and benzene series, applied in chemical instruments and methods, water pollutants, other chemical processes, etc., can solve the problems of high equipment and operation costs, difficult desorption, high infrastructure costs, etc., and achieve adjustable pores High performance, enhanced adsorption performance, and unique pore structure

Active Publication Date: 2017-11-10
石家庄民康水处理技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Photocatalytic degradation has the characteristics of high efficiency and fast reaction, but it cannot be completely oxidized to CO because of the stable intermediate products produced in the process of degrading organic matter, which inhibit its continued oxidation. 2 , the degradation is incomplete; although the membrane separation method can remove the benzene series pollutants in the water well, it has the disadvantages of difficult cleaning, high equipment and operation costs, and the membrane treatment technology is only suitable for small water treatment processes; the biodegradation method can There are few strains of bacteria that degrade benzene series, and the area is large, and the infrastructure cost is high
In contrast, the adsorption method has great advantages in removing benzene series pollutants. Currently, the adsorbents used to treat water pollution mainly include carbon molecular sieves, carbon nanotubes, activated carbon, etc. High price, large operating cost, difficult desorption after microporous adsorption, complex regeneration and other problems are subject to many restrictions in the process of industrialization

Method used

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  • Porous composite material for removing low-concentration benzene series and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] This example relates to a group of porous composite materials used to remove low-concentration benzene series and the comparison of their use effects. The content of benzene series in low-concentration benzene series is generally 10mg / L-40mg / L. The use effect experiment is carried out in a tubular reactor under normal pressure, the reaction temperature is 30°C, and the mass space velocity of waste water is 1.5h - 1 , after the reaction, the mixture enters the storage tank, and 5ml of the supernatant is taken with CS 2 Extract and measure the concentration of benzene series by gas chromatography. The content of benzene series in the wastewater to be treated is 29mg / L, and the composition and application effect of each porous composite material are shown in the following table:

[0024]

[0025] From the results in the above table, it can be seen that the weight ratio of attapulgite and molecular sieve in the porous composite material is different, and the activity, ...

Embodiment 2

[0034] This example involves the influence of impregnation treatment conditions on the performance of porous composite materials (use effect experiment is the same as Example 1). The ratio of raw materials and preparation method used are basically the same as those in Example 1.2. The only difference is that the impregnation in step b is changed. Temperature and soaking time, the results are shown in the table below:

[0035]

[0036] It can be seen from the results in the above table that when the impregnation treatment temperature is 80°C and the treatment time is 9 hours, the activity of the obtained porous composite material is the best, and the adsorption capacity and removal rate of benzene series are the best. If the temperature and time are too low, the nitrate aqueous solution of tungsten and titanium will not be completely impregnated, and the adsorption capacity and removal rate of benzene series by the porous composite material will be low; if the temperat...

Embodiment 3

[0038] This example relates to different preparation methods of porous composite materials for the removal of low concentration benzene series.

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Abstract

The invention relates to a porous composite material for removing low-concentration benzene series. The porous composite material is composed of attapulgite and molecular sieves for absorbing benzene series. The composite carrier is loaded with active components of tungsten and titanium nitrate The weight ratio of the attapulgite to the molecular sieve absorbing benzene series is 1:(1~4), and the weight ratio of the composite carrier to tungsten nitrate and titanium nitrate is 1:(0.5~0.7):( 4~12). The obtained porous composite material can absorb and degrade benzene series in water, can be used to remove low-concentration benzene series in water, has high adsorption capacity for benzene series, good removal effect, no secondary pollution, and can be recycled. The preparation method for removing low-concentration benzene series in water has simple process and low cost, and is suitable for industrial production and application.

Description

technical field [0001] The invention relates to a water treatment material, in particular to a porous composite material for removing low-concentration benzene series, and also to a preparation method of the porous composite material. Background technique [0002] Due to their specific chemical properties, benzene and benzene series will cause great harm to the natural environment and human health. In 2008, it was identified as a strong carcinogen by the World Health Organization. However, in the chemical industry, benzene and its homologues are important raw materials. In the fields of organic synthesis, rubber, paint and dyes, synthetic fibers, petroleum processing, pharmaceuticals, cellulose and other production fields, the waste water and waste gas produced will cause benzene large quantities of emissions. When the benzene series enter the water body, the physical, chemical properties and radioactivity of the water body will change, and the biological community group in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/12B01J20/30C02F1/28C02F1/58C02F101/30
Inventor 康秀卿刘义杰刘淑荣赵培楠康秀锋吴宝娈
Owner 石家庄民康水处理技术有限公司