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Mineral precursor adsorbing agent and preparation method and application thereof

A precursor and adsorbent technology, which is applied in the field of mineral precursor adsorbent and its preparation, can solve the problem of unsatisfactory adsorption capacity and achieve excellent adsorption effect

Inactive Publication Date: 2016-05-04
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, the existing adsorbents are limited by the unfavorable factors brought about by the structure of the adsorbent, the competing components in the aqueous solution, the concentration potential difference, etc. when adsorbing the predetermined components in the sewage, and the adsorption capacity cannot reach a satisfactory level.

Method used

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  • Mineral precursor adsorbing agent and preparation method and application thereof
  • Mineral precursor adsorbing agent and preparation method and application thereof
  • Mineral precursor adsorbing agent and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A kind of mineral precursor adsorbent, its preparation method comprises the steps:

[0031] 1.38g magnesium hydroxide (Mg(OH) 2 ), 0.62g aluminum hydroxide (Al(OH) 3 ), (the molar ratio is 3:1), put it into a 50mL grinding jar, add 80g of zirconium balls with a diameter of 15mm, set the mill speed to 700rpm, and the grinding time to 180min. After the grinding is completed, the mineral precursor adsorbent is obtained.

[0032] figure 1 The XRD patterns of the mineral precursor adsorbent obtained in this example are used to adsorb wastewater containing methyl orange before and after. Depend on figure 1 It can be seen that after the raw materials (magnesium hydroxide and aluminum hydroxide) are mechanically ground, the structure is destroyed, and a weak crystal structure substance near glass is formed. After absorbing methyl orange in the aqueous solution, the obtained mineral precursor adsorbent is transformed into Highly crystalline hydrotalcite.

[0033] Add the mi...

Embodiment 2

[0038] A kind of mineral precursor adsorbent, its preparation method comprises the steps:

[0039] Mix 0.5g calcium hydroxide, 1.15g calcium sulfate dihydrate and 0.35g aluminum hydroxide (molar ratio is 3:3:2), put them into a 50mL grinding jar, add 80g of zirconium balls with a diameter of 15mm, place Set the grinding speed in the mill to 500 rpm, and the grinding time to 120 min. After the grinding is completed, the mineral precursor adsorbent is obtained.

[0040] figure 2 It is the XRD patterns of the mineral precursor adsorbent obtained in this example before and after being used to adsorb phosphorus-containing wastewater. Depend on figure 2 It can be seen that after the raw materials (calcium hydroxide, calcium sulfate dihydrate, aluminum hydroxide) are mechanically ground, the structure is destroyed and a weakly crystalline substance is formed. After absorbing phosphorus in the aqueous solution, the mineral precursor compound is transformed into a highly crystallin...

Embodiment 3

[0046] A preparation method of a mineral precursor adsorbent, comprising the steps of:

[0047] Mix 0.85g of calcium hydroxide, 0.56g of calcium chloride dihydrate and 0.59g of aluminum hydroxide (the molar ratio is 3:1:2) into a 50mL grinding jar, add 80g of zirconium balls with a diameter of 15mm, and place in the grinding jar. The grinding speed is set to 500 rpm in the machine, and the grinding time is 120 min. After the grinding is completed, the mineral precursor adsorbent is obtained.

[0048] image 3 It is the XRD pattern of the products obtained after the mineral precursor adsorbent products obtained in this example are respectively used to adsorb chlorine-containing wastewater. Depend on image 3 It can be seen that after the raw material is mechanically ground, the structure is destroyed and a weakly crystalline substance is formed. After absorbing methyl orange in the aqueous solution, the mineral precursor compound is transformed into Ca-Al-Cl hydrotalcite. Th...

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Abstract

The invention discloses a mineral precursor adsorbing agent and a preparation method thereof. A mechanical force grinding means is adopted, raw materials are placed into a grinding machine according to the matching ratios, the ratio of grinding media to materials is controlled to be 7-45, the grinding speed is 100-1200 rpm, the grinding time is 20-240 min, and the mineral precursor adsorbing agent is obtained. The precursor adsorbing agent can be hydrated on the condition of room temperature water phase stirring to obtain the set mineral phase; meanwhile, in the process of converting the precursor structure into the synthetic mineral phase, various organic pollutants and inorganic pollutants in a water solution can be captured and removed, and useful constituents in water can be recycled. Being different from the adsorption effect of common adsorbing agents, the mineral precursor adsorbing agent can greatly improve the removing efficiency for pollutants based on the reaction adsorption phenomenon of the precursor. The related preparation method is simple in technology, free of pollution, environmentally friendly and low in cost. The mineral precursor adsorbing agent can be widely applied in the fields of printing and dyeing, chemical engineering, domestic sewage purification, resource recovery and reuse and the like.

Description

technical field [0001] The invention belongs to the field of sewage treatment, and in particular relates to a mineral precursor adsorbent and its preparation method and application. Background technique [0002] Sewage is mainly divided into domestic sewage, industrial wastewater and initial rainwater, which contains a large amount of organic and inorganic pollutants, posing a huge threat to ecology and human health. At present, the main methods of sewage treatment include: chemical precipitation method, ion exchange method, electrolysis method, membrane separation method, adsorption method, etc., among which adsorption method is used for water treatment. It has the advantages of wide application range, good treatment effect, recyclable useful materials and reusable adsorbent. With the continuous improvement of the performance of existing adsorbents and the successful development of new adsorbents. The application prospect of adsorption method in water treatment will be mor...

Claims

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Application Information

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IPC IPC(8): B01J20/30B01J20/12C02F1/28
CPCB01J20/0203B01J20/041B01J20/043B01J20/08B01J20/12C02F1/281C02F2101/10C02F2101/105C02F2101/30C02F2101/308
Inventor 张其武瞿军钟丽华王本涛雷治武
Owner WUHAN UNIV OF TECH
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