Modified montmorillonite and preparation method as well as application thereof in water resource purification

A montmorillonite and modified technology, applied in other chemical processes, chemical instruments and methods, adsorbed water/sewage treatment, etc., can solve the problems of the limitation of adsorbable metal ions, and achieve the goal of improving selective adsorption defects and improving the degree of purification. Effect

Inactive Publication Date: 2014-04-23
CHINA SHENHUA ENERGY CO LTD +1
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] The present invention aims to provide a modified montmorillonite, its preparation method and its application in purifying water sources, so as to solve the problem that the adsorbable metal ions in the prior art are relatively limited when using montmorillonite to purify water sources

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  • Modified montmorillonite and preparation method as well as application thereof in water resource purification

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preparation example Construction

[0020] As introduced in the background technology section, when using montmorillonite to purify water sources, there is a problem that the adsorbable metal ions are relatively limited. In order to solve this problem, the inventors of the present invention provide a preparation method of modified montmorillonite. The method comprises the following steps: S1, adding montmorillonite to the first solution to form a suspension to be columnized; S2, adding the second solution to the suspension to be columnized, stirring and reacting, and filtering to obtain the modified Montmorillonite; wherein, the first solution is an aqueous solution of sodium hydroxide, and the second solution is an aqueous solution of ferric chloride; or the first solution is an aqueous solution of ferric chloride, and the second solution is an aqueous solution of sodium hydroxide.

[0021] In the above method provided by the present invention, the ferric hydroxide pillaring agent is introduced between the crys...

Embodiment 1

[0037] At a temperature of 30°C, disperse 10g of montmorillonite into 200ml of 0.005mol / L FeCl 3 In an aqueous solution, a suspension to be columnized is formed;

[0038] Add 300ml, 0.005mol / L NaOH aqueous solution dropwise at a flow rate of 0.6ml / min to the suspension to be columned, and keep stirring during the addition. After the titration is completed, after reacting for 2 hours, filter with suction, dry at 70° C. for 24 hours, and grind to below 200 mesh to obtain modified montmorillonite.

Embodiment 2

[0040] Weigh 10g of montmorillonite and disperse it into 200ml of 0.05mol / L NaOH aqueous solution, and stir at 70°C for 3h. Cooling, suction filtration, washing with deionized water twice, drying to obtain pretreated montmorillonite;

[0041] At a temperature of 30°C, disperse the above pretreated montmorillonite into 200ml, 0.005mol / L FeCl 3 In an aqueous solution, a suspension to be columnized is formed;

[0042] Add 300 ml, 0.005 mol / L NaOH aqueous solution dropwise at a flow rate of 3.5 ml / min to the suspension to be columned, and keep stirring during the addition. After the titration was completed, after 2 hours of reaction, suction filtration was performed. Wash twice with suction filtration of hydrochloric acid with a concentration of 0.02mol / L, and then wash three times with deionized water. Then it was placed in 50ml of hydrogen peroxide / water solution with a concentration of 12wt%, stirred for 1h and then suction filtered. Dry at 70°C for 24 hours, and grind to b...

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Abstract

The invention discloses modified montmorillonite and a preparation method as well as an application thereof in water resource purification. The preparation method comprises the following steps: S1, adding montmorillonite into a first solution so as to form a suspension to be pillared; and S2, adding a second solution into the suspension to be pillared, reacting in a stirring manner and filtering so as to obtain the modified montmorillonite, wherein the first solution is a sodium hydroxide aqueous solution and the second solution is a ferric chloride aqueous solution; or the first solution is the ferric chloride aqueous solution and the second solution is the sodium hydroxide aqueous solution. According to the method, the montmorillonite is modified in the manner that a ferric hydroxide pillaring agent is added between the crystal layers of the montmorillonite. When the modified montmorillonite is applied to sewage treatment, the ferric hydroxide pillaring agent can be used for adsorbing metal ions which are provided with negative charges and exist in the sewage in the form of complex anions. Thus, the problem that the montmorillonite only can be used for adsorbing metal cations is solved. As a result, the purification degree of the sewage is improved.

Description

technical field [0001] The invention relates to the field of groundwater pollution control, in particular to a modified montmorillonite, its preparation method and its application in purifying water sources. Background technique [0002] With the rapid development of industrialization and urbanization, a large amount of metal ions are discharged into the environment, resulting in serious heavy metal pollution of surface water and groundwater. At present, there are mainly chemical precipitation, ion exchange, membrane separation and co-precipitation methods for the treatment of heavy metal polluted water at home and abroad. These methods have single functions and relatively expensive materials, which cannot solve the increasingly serious water pollution problem. Based on this, researchers have invested a lot of research, trying to find more efficient, cheap and easy-to-obtain water pollution purification materials, in order to more effectively solve the problem of heavy meta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/12B01J20/30C02F1/28
Inventor 赵伟刘海飞
Owner CHINA SHENHUA ENERGY CO LTD
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