Preparation method of grading magnesium and aluminum hydrotalcite capable of adsorbing Cr(VI)

A magnesium aluminum hydrotalcite and adsorbent technology, which is applied in the direction of separation methods, adsorption water/sewage treatment, chemical instruments and methods, etc., can solve the problems of complex preparation process and difficult control of magnesium aluminum hydrotalcite morphology, and achieve simple process , Good recycling ability, high adsorption effect
CN103551104AInactive Publication Date: 2014-02-05WUHAN UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
WUHAN UNIV OF TECH
Publication Date
2014-02-05
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a preparation method of grading magnesium and aluminum hydrotalcite capable of adsorbing Cr(VI) and recycling. The method comprises the steps of firstly, sequentially adding a certain amount of sodium polyacrylate, Pluronic block copolymer P123 or F127 and a urea precipitating agent into magnesium salt solution and aluminum salt solution, stirring and dissolving and transferring to a hydrothermal kettle for performing hydrothermal treatment, naturally cooling, filtering, washing, vacuum drying and roasting a hydrothermal product to obtain magnesium and aluminum hydrotalcite with excellent Cr(VI) property. The method has the advantages of low-cost active ingredients, simple preparation technology, mild conditions, diversified product shapes and the like, and the prepared grading magnesium and aluminum hydrotalcite has good adsorption property on the Cr(VI) in a water body, and can be regenerated and recycled.
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Description

technical field

[0001] The invention relates to a magnesium aluminum hydrotalcite material used in the field of environmental purification, in particular to a preparation method of a graded magnesium aluminum hydrotalcite adsorbent which adsorbs Cr(VI) and can be recycled. Background technique

[0002] Chromium is one of the common heavy metal elements in industrial wastewater. Chromium-containing wastewater is very harmful to the ecological environment and human health, especially Cr(VI) is very toxic and is easily absorbed and accumulated in the human body. Highly carcinogenic. Therefore, the treatment of chromium-containing wastewater has aroused the attention of all walks of life. There are more than ten kinds of treatment methods for Cr(VI)-containing wastewater, such as chemical precipitation, ion exchange, electrolysis, and adsorption. Among them, the porous solid adsorption method has the advantages of simple operation and strong practicability. The field of wastew...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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