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Method for preparing uranium adsorbent and curing agent from white mud and oil shale ash

The technology of oil shale ash and curing agent is applied in the field of uranium adsorption and curing material preparation, which can solve the problems of narrow application range, single product type of uranium-containing wastewater treatment materials, and high production cost, so as to improve the treatment capacity and improve the uranium-containing wastewater. Wastewater treatment capacity, the effect of reducing usage

Inactive Publication Date: 2015-09-30
三亚哈尔滨工程大学南海创新发展基地
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Problems solved by technology

[0005] 2. Using a single waste as a raw material to process uranium-containing wastewater treatment materials has a single product type and a narrow application range
But the shortcomings are mainly concentrated in the high production cost of chemical reagents as raw materials, and it is only used for better adsorption under weak acid conditions (pH between 4 and 6).

Method used

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  • Method for preparing uranium adsorbent and curing agent from white mud and oil shale ash

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) Crush and grind the oil shale ash to 200 mesh, add NaCl with 40-100% of the ash mass, calcinate at 1000-1200K for 3-10 hours, and air-dry to obtain sample A.

[0037] (2) According to the ratio of 2-5mL per gram of A, add 2-8M HCl to A. Extract metal ions under 333-573K vigorous stirring or microwave-assisted conditions, extract for 3-10 hours, separate the extract from the residue, grind and pulverize the residue. Repeat this step 3-10 times, and combine the extracts to obtain sample B. The final residue is 40-60%H 2 SO 4 Washed under vigorous stirring at 353-393K to obtain sample C

[0038] (3) Calcining the white mud 1173-1273K for 3-10 hours, the CO produced during the calcination process 2 Recovery with NaOH, preparation of Na 2 CO 3 . The product of calcined lime mud is sample D, and the CO 2 Save under conditions.

[0039] (4) By adjusting the method of adding the mass of D to B, the ratio of the total moles of trivalent and tetravalent metal ions to...

Embodiment 2

[0043] Change (1) in Example 1 to: crush and grind the oil shale ash to 200 mesh, add NaCl with 60-100% of the ash mass, calcinate at 1100-1200K for 3-8 hours, and air-dry to obtain sample A .

Embodiment 3

[0045] Change (1) in Example 2 to: crush and grind oil shale ash to 200 mesh, add NaCl with 80-100% ash mass, calcinate at 1150-1200K for 3-5 hours, and air-dry to obtain sample A .

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Abstract

The invention provides a method for preparing a uranium adsorbent and a curing agent by using raw materials of white mud and oil shale ash. The method comprises the following steps: (1) crushing oil shale ash, adding sodium salt and forging to obtain a product A; (2) adding HCL into the product A to extract metal ions, preparing a product B through an extracting solution, and preparing a product C through residues; (3) forging the white mud, preparing Na2CO3 with CO2 generated in a forging process so as to obtain a solid, namely the product D; (4) adding the Na2CO3 prepared in the step (3) when adjusting the pH (Potential of Hydrogen) value to be 5 by adjusting and controlling a total mol ratio of trivalent and tetravalent metal ions to divalent metal ions in the solution, and further adjusting the pH value of the solution to be in a range of 5-12, so as to obtain a uranium adsorbent E, and using NaCl in recycled filtrate as the raw materials in the step (1); (5) mixing the product C with the product D; and reacting the product C and the product D by adding water to obtain a uranium curing agent F. With the adoption of the method provided by the invention, the harmless, the recycling and the functionalization of various wastes can be realized; the products have the strong treatment capability of uranium-contained waste water.

Description

technical field [0001] The invention relates to a preparation method of a uranium adsorption and solidification material, and also relates to a preparation method of a material for comprehensive utilization of industrial waste after oil shale processing and radioactive waste liquid treatment. Background technique [0002] The application of industrial waste to produce uranium-containing wastewater adsorbent and uranium curing agent can not only realize the harmless and resourceful treatment of industrial waste, but also reduce the production cost of adsorbent, and achieve a win-win situation of social, environmental and economic benefits. Therefore, this research It has important research value and broad application prospects for energy and environmental protection. [0003] The current research mainly focuses on processing uranium-containing wastewater treatment materials with a single waste as raw material, and its shortcomings are mainly reflected in: [0004] 1. Since a...

Claims

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Application Information

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IPC IPC(8): B01J20/10B01J20/30C02F1/28C02F101/20
Inventor 王君张宏森刘琦刘婧媛宋大雷丁明惠张斌
Owner 三亚哈尔滨工程大学南海创新发展基地
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