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Magnetic attapulgite cellulose composite microsphere as well as preparation method and application thereof

A technology of attapulgite and composite microspheres, applied in chemical instruments and methods, alkali metal compounds, and other chemical processes, can solve the problems of unfavorable adsorption of heavy metal cadmium, etc. The effect of grafting ratio

Pending Publication Date: 2022-04-15
BCEG ENVIRONMENTAL REMEDIATION CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the existing method of preparing carrier microspheres by using cellulose, the microspheres obtained are soft, and the pores of the microspheres are less, which is not conducive to the subsequent adsorption and the adsorption of heavy metal cadmium, and then provide a magnetic Attapulgite cellulose composite microspheres and its preparation method and application

Method used

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  • Magnetic attapulgite cellulose composite microsphere as well as preparation method and application thereof
  • Magnetic attapulgite cellulose composite microsphere as well as preparation method and application thereof
  • Magnetic attapulgite cellulose composite microsphere as well as preparation method and application thereof

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Effect test

Embodiment 1

[0040] This embodiment provides a method for preparing magnetic attapulgite cellulose composite microspheres, comprising the following steps:

[0041] 1) Attapulgite (the specific surface area of ​​attapulgite is 800m 2 / g) washing with water to remove impurities, passing through a 400-mesh sieve after drying, then weighing 30g of the sieved attapulgite, adding it to 300g of hydrochloric acid with a concentration of 4mol / L, stirring and activating at 90°C for 4h, and suction filtration. The product was washed with water until neutral, and then dried at 60°C for 12 hours to obtain activated attapulgite;

[0042] 2) Take 40 g of ionic liquid 1-allyl-3 methylimidazolium chloride salt, add 1 g of microcrystalline cellulose to the ionic liquid, and heat at 100° C. for 2 hours to completely dissolve the cellulose to obtain a cellulose solution;

[0043] 3) Add 0.5 g of activated attapulgite, 0.2 g of nano-ferric oxide and 0.15 g of calcium carbonate to the cellulose solution obtain...

Embodiment 2

[0055] This embodiment provides a method for preparing magnetic attapulgite cellulose composite microspheres, comprising the following steps:

[0056] 1) Attapulgite (the specific surface area of ​​attapulgite is 800m 2 / g) washing with water to remove impurities, passing through a 400-mesh sieve after drying, then weighing 30g of the sieved attapulgite, adding it to 300g of hydrochloric acid with a concentration of 4mol / L, stirring and activating at 90°C for 4h, and suction filtration. The product was washed with water until neutral, and then dried at 60°C for 12 hours to obtain activated attapulgite;

[0057] 2) Take 40 g of ionic liquid 1-allyl-3 methylimidazolium chloride salt, add 1 g of microcrystalline cellulose to the ionic liquid, and heat at 100° C. for 2 hours to completely dissolve the cellulose to obtain a cellulose solution;

[0058] 3) Add 1g of activated attapulgite to the cellulose solution obtained in step 2), 0.5g of nano-ferric oxide and 0.2g of calcium ca...

Embodiment 3

[0069] This embodiment provides a method for preparing magnetic attapulgite cellulose composite microspheres, comprising the following steps:

[0070] 1) Attapulgite (the specific surface area of ​​attapulgite is 800m 2 / g) washing with water to remove impurities, passing through a 400-mesh sieve after drying, then weighing 30g of the sieved attapulgite, adding it to 300g of hydrochloric acid with a concentration of 4mol / L, stirring and activating at 90°C for 4h, and suction filtration. The product was washed with water until neutral, and then dried at 60°C for 12 hours to obtain activated attapulgite;

[0071] 2) Take 40 g of ionic liquid 1-allyl-3 methylimidazolium chloride salt, add 1 g of microcrystalline cellulose to the ionic liquid, and heat at 100° C. for 2 hours to completely dissolve the cellulose to obtain a cellulose solution;

[0072] 3) Add 1g of activated attapulgite to the cellulose solution obtained in step 2), 0.5g of nano-ferric oxide and 0.6g of calcium ca...

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Abstract

The invention relates to the technical field of heavy metal contaminated soil remediation, in particular to a magnetic attapulgite cellulose composite microsphere as well as a preparation method and application thereof. The preparation method of the magnetic attapulgite cellulose composite microspheres provided by the invention comprises the following steps: mixing cellulose and ionic liquid, and heating to obtain a cellulose solution; the preparation method comprises the following steps: mixing a cellulose solution, attapulgite, magnetic particles and a pore-forming agent, dropwise adding the obtained mixed solution into an acid solution, and filtering to obtain composite microspheres; and mixing the composite microspheres, a solvent and acrylamide, then adding an initiator and an acid, carrying out a stirring reaction, and carrying out filtering and drying so as to obtain the magnetic attapulgite cellulose composite microspheres. The composite microspheres prepared by the preparation method provided by the invention can effectively solidify and stabilize cadmium ions in soil, reduce the biological effective state content of the cadmium ions, and reduce the soil heavy metal absorption amount of crops.

Description

technical field [0001] The invention relates to the technical field of remediation of heavy metal polluted soil, in particular to a magnetic attapulgite cellulose composite microsphere and a preparation method and application thereof. Background technique [0002] Due to the rapid development of modern industry, heavy metals in the atmosphere enter water bodies and soils through rainwater, which will aggravate the problem of heavy metal pollution in water bodies and soils. [0003] Attapulgite is a mineral mainly composed of hydrous magnesium-rich aluminum silicate, which belongs to silicate minerals. porous material. Cellulose, the most abundant and renewable organic biopolymer in the world, is widely recognized as an important source of sustainable materials due to its strong mechanical strength, biocompatibility and thermal stability. Attapulgite and cellulose are abundant in my country, low in price, and have strong ion exchange capacity and good adsorption performance...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/28B01J20/30B09C1/08
Inventor 李博郭丽莉王蓓丽李书鹏熊静徐宏伟樊强杨旭李亚秀
Owner BCEG ENVIRONMENTAL REMEDIATION CO LTD
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