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Modified attapulgite/sodium alginate/polyvinyl alcohol composite adsorbent as well as preparation method and application thereof

A technology for modifying attapulgite and sodium alginate, which is applied to chemical instruments and methods, and other chemical processes, and can solve the problems of low reuse rate and low adsorption performance

Inactive Publication Date: 2021-01-29
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although the adsorption capacity of the adsorption material can be improved by modifying the attapulgite in various aspects, the adsorption materials prepared in the prior art still have the disadvantages of low adsorption performance and low reuse rate

Method used

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  • Modified attapulgite/sodium alginate/polyvinyl alcohol composite adsorbent as well as preparation method and application thereof
  • Modified attapulgite/sodium alginate/polyvinyl alcohol composite adsorbent as well as preparation method and application thereof
  • Modified attapulgite/sodium alginate/polyvinyl alcohol composite adsorbent as well as preparation method and application thereof

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preparation example Construction

[0023] The invention provides a method for preparing a modified attapulgite / sodium alginate / polyvinyl alcohol composite adsorbent, comprising the following steps:

[0024] (1) attapulgite and hydrochloric acid solution are mixed to carry out acid modification, obtain acid-modified attapulgite;

[0025] (2) The acid-modified attapulgite obtained in the step (1) is mixed with water, magnesium sulfate solution and ammonia water successively, and a metathesis reaction is carried out to obtain a precursor; the precursor is calcined to obtain magnesium oxide / attapulgite composite materials;

[0026] (3) The magnesium oxide / attapulgite composite material obtained in the step (2) is mixed with water, polyvinyl alcohol and sodium alginate to obtain a mixed solution; the mixed solution is sequentially formed and solidified to obtain a modified attapulgite Soil / sodium alginate / polyvinyl alcohol composite adsorbent.

[0027] The invention mixes attapulgite with hydrochloric acid solutio...

Embodiment 1

[0060] (1) Mix 5 g of ATP with a particle size of 150 μm and 75 mL of a hydrochloric acid solution with a concentration of 1 mol / L, place the resulting mixture in a shaker, shake at a speed of 180 rpm for 60 min, and then centrifuge at a speed of 4000 rpm for 20 min The precipitate obtained by centrifugation was washed three times with deionized water, and the washed precipitate was placed in an oven at 75° C. for 24 hours, and then the dried solid was passed through a 100-mesh sieve to obtain acid-modified ATP.

[0061] (2) the acid-modified ATP that 5g step (1) obtains and 200mL deionized water and 12mL concentration are that the magnesium sulfate solution that 100g / L obtains is placed in the shaker, shakes 15min under the speed of 150rpm, To form a suspension, add 10 mL of 28% ammonia water to the suspension, and shake at a rate of 180 rpm for 45 minutes; separate the solid product from the shaken product under centrifugation at 4000 rpm, and wash the solid product with deio...

Embodiment 2

[0064] (1) Mix 5 g of ATP with a particle size of 100 μm and 50 mL of hydrochloric acid solution with a concentration of 0.5 mol / L, place the resulting mixture in a shaker, shake at a speed of 150 rpm for 45 min, and then centrifuge at a speed of 4500 rpm 20 min; the precipitate obtained by centrifugation was washed 3 times with deionized water, and the washed precipitate was placed in an oven at 70°C for 24 hours, and then the dried solid was passed through a 100-mesh sieve to obtain acid-modified ATP.

[0065] (2) The mixed solution obtained by the acid-modified ATP obtained in 5g step (1) and 200mL deionized water and 10mL concentration is that the magnesium sulfate solution of 110g / L is placed in a shaker, and shaken at a speed of 150rpm for 20min, To form a suspension, add 12mL of 28% ammonia water to the suspension, shake at a rate of 150rpm for 30min; separate the solid product from the shaken product under centrifugation at 4500rpm, and wash the solid product fully with...

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Abstract

The invention relates to the technical field of catalytic materials, and provides a preparation method of a modified attapulgite / sodium alginate / polyvinyl alcohol composite adsorbent. The preparationmethod comprises the following steps: mixing attapulgite with a hydrochloric acid solution, and carrying out acid modification to obtain acid-modified attapulgite; sequentially mixing the obtained acid-modified attapulgite with water, a magnesium sulfate solution and ammonia water, and carrying out a double decomposition reaction to obtain a precursor; calcining the precursor to obtain a magnesiumoxide / attapulgite composite material; mixing the obtained magnesium oxide / attapulgite composite material with water, polyvinyl alcohol and sodium alginate to obtain a mixed solution; and sequentiallymolding and curing the mixed solution to obtain the modified attapulgite / sodium alginate / polyvinyl alcohol composite adsorbent. According to the preparation method provided by the invention, the attapulgite is modified, so the adsorbability of the composite adsorbent can be improved; and through molding and curing, the composite adsorbent has excellent mechanical properties, and the reuse rate ofthe composite adsorbent is improved.

Description

technical field [0001] The invention relates to the technical field of catalytic materials, in particular to a cobalt metal organic framework material and its preparation method and application. Background technique [0002] Soil is an essential part of Earth's biosphere and the foundation of agricultural and natural ecosystems. As a living and dynamic resource, soil is a base for the production of food, fiber, etc., and a buffer for the formation, attenuation and degradation of harmful compounds in the environment. It has the function of balancing regional and global ecosystems. makes an important impact. Heavy metal pollution is concealed, lagging, morphologically diverse, accumulative, and difficult to eliminate. Excessive heavy metals in soil and water will be taken up by animals and plants in the ecosystem, and enter the human body through the food chain to produce an amplified effect, affecting the health of residents. healthy and cause serious damage to the ecosyste...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/30
CPCB01J20/041B01J20/12B01J20/24B01J20/261
Inventor 何池全张浦胡安妮王菲菲
Owner SHANGHAI UNIV
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