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A modified attapulgite material and its preparation and application method

A technology for modifying attapulgite and attapulgite, which is applied in the field of uranium adsorption materials and can solve problems such as limited adsorption performance

Active Publication Date: 2019-03-05
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, attapulgite itself is prone to agglomeration, and its own adsorption performance is limited. Usually, it needs to be modified to improve its adsorption performance.

Method used

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  • A modified attapulgite material and its preparation and application method
  • A modified attapulgite material and its preparation and application method
  • A modified attapulgite material and its preparation and application method

Examples

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Embodiment Construction

[0026] The following examples describe the present invention in more detail.

[0027] Put 1g of attapulgite in 15ml, 0.2mol / L HCl solution, ultrasonic 10-30min, filter, wash with deionized water, after filtration, dry at 80°C for 4h, heat up to 350°C for 2-10h, cool to room temperature , to obtain intermediate A;

[0028] 0.2g MnCl 2 4H 2 Add O to 100mL isopropanol, dissolve and add intermediate A, stir and sonicate for 10-30min, stir for 30-120min, add 10-20mL0.04mol / L potassium permanganate solution, stir, reflux at 87°C for 30 -60min, cool to room temperature; suction filter, wash with 30% isopropanol solution until the liquid is clear; dry in an oven at 80-100°C for 1.5-2h to obtain modified attapulgite.

[0029] The characteristics of the above steps are described as follows:

[0030] (1) Acid activation: After the attapulgite is soaked in acid, the internal structure will be partially dissolved, and the undissolved part will act as a support, increasing the number of...

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Abstract

The invention provides a modified attapulgite material and its preparation and application methods. The modified attapulgite is prepared by: ultrasonically treating attapulgite in HCL solution, filtering, washing, drying, heating to 350+ / -5 DEG C for activation, and cooling to room temperature to obtain intermediate A; dissolving MnCl2.4H2O in isopropanol, adding the intermediate A, stirring and ultrasonically processing, adding potassium permanganate solution, refluxing at 87+ / -2 DEG C, cooling to room temperature, filtering by suction, washing with isopropanol solution until a clear liquid is formed, and drying at 80-100 DEG C. Through acid activation and thermal activation, specific surface area is enlarged, attachment active sites for bivalent manganese ions are increased; the activated attapulgite can adsorb bivalent manganese ions under anhydrous condition, and it is possible to effectively avoid the competition between water and the bivalent manganese ions; the number of the bivalent manganese ions is under control, it is guaranteed that post-adsorbing solution contains few bivalent manage ions, and no influence is caused to further reaction.

Description

technical field [0001] The invention relates to a uranium adsorbing material, and also relates to a preparation method of the uranium adsorbing material, and also relates to an application method of the uranium adsorbing material. Background technique [0002] Attapulgite, also known as palygorskite, is a hydrous magnesium-rich silicate clay mineral with a chain layer structure, which belongs to the sepiolite group in mineralogy. Attapulgite contains a lattice replacement structure on both sides, and there is a variable amount of Ca 2+ , Fe 3+ , Mg 2+ 、Al 3+ , and its approximate chemical formula is: Mg 5 Si 8 o 20 (OH) 2 (OH 2 ) 4 4H 2 O. The specific structure of attapulgite is composed of 8 tetrahedrons, among which Si 4+ can be Al 3+ and Fe 3+ Plasma replaced, Mg 2+ Can also be a small amount of Fe 2+ and Al 3+ ion instead. [0003] The crystals of attapulgite are nano-scale fibrous, needle-like or fiber-assembled, with a large specific surface, which b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/12B01J20/30G21F9/12
CPCB01J20/06B01J20/12G21F9/12
Inventor 王君魏新涛张宏森刘琦刘婧媛宋大雷李茹民
Owner HARBIN ENG UNIV
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