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Adsorbent of immobilized rare earth metal cerium and preparation method thereof

A technology of rare earth metals and adsorbents, applied in chemical instruments and methods, adsorption water/sewage treatment, and other chemical processes, to achieve strong stability, easy operation, and low secondary pollution

Inactive Publication Date: 2012-11-28
LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, this material has been studied in the removal of dyes, metal ions, and the immobilization of microorganisms and enzymes. However, the functional materials combined with collagen and rare earth metal elements have not been reported yet.

Method used

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  • Adsorbent of immobilized rare earth metal cerium and preparation method thereof
  • Adsorbent of immobilized rare earth metal cerium and preparation method thereof
  • Adsorbent of immobilized rare earth metal cerium and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1: A kind of adsorbent of immobilized rare earth metal cerium

[0024] The preparation method is as follows:

[0025] 1) Pretreatment of immobilized matrix: add 30g of dry collagen (commercially available) to 400mL of deionized water, shake or stir intermittently, and soak for about 20 hours to fully wet the collagen. Slowly add 10% (v / v) sulfuric acid to the above mixture to adjust the pH value of the whole system to 1.6, stir in the reactor at room temperature for 3 hours, and then set aside.

[0026] 2) Immobilization: Dissolve 90g of cerium sulfate in 400mL of deionized water, configure a cerium ion solution, and slowly add the cerium ion solution to the mixing system of the above step 1), so that the mass ratio of collagen to metal ion cerium is 1.4: 1. After reacting at room temperature for 3 hours, raise the temperature to about 45°C, add 1.5g / L sodium bicarbonate solution dropwise, adjust the pH to about 3.0-4.0, continue the reaction for about 6 hou...

Embodiment 2

[0029] Embodiment 2: A kind of adsorbent of immobilized rare earth metal cerium

[0030] The preparation method is as follows:

[0031] 1) Pretreatment of immobilized matrix: Add 20g of dry collagen (commercially purchased) into 200mL of deionized water, shake or stir intermittently, and soak for 24 hours to fully wet the collagen. Slowly add 10% (v / v) sulfuric acid to the above mixture to adjust the pH value of the whole system to 2.0, stir in the reactor at room temperature for 2 hours, and then set aside.

[0032]2) Immobilization: Dissolve 66.45g of cerium nitrate in 400mL of deionized water, configure a cerium ion solution, and slowly add the cerium ion solution to the mixing system of the above step 1), so that the mass ratio of collagen to metal ion cerium is 0.95 : 1 After reacting at room temperature for 2 hours, raise the temperature to 35°C, add 2.0g / L sodium hydroxide solution dropwise, adjust the pH to about 5.0-6.0, continue the reaction for about 4 hours, cool ...

Embodiment 3

[0035] Embodiment 3: A kind of adsorbent of immobilized rare earth metal cerium

[0036] The preparation method is as follows:

[0037] 1) Pretreatment of immobilized matrix: Add 30g of dry collagen (commercially purchased) into 600mL of deionized water, shake or stir intermittently, and soak for 12h. Slowly add 20% (v / v) hydrochloric acid to the above mixture to adjust the pH value of the whole system to 1.8, and stir in the reactor at room temperature for 4 hours before use.

[0038] 2) Immobilization: Take 5.588g of cerium trichloride and dissolve it in 400mL of deionized water, configure a cerium ion solution, take the cerium ion solution and slowly add it to the mixing system of the above step 1), so that the mass ratio of collagen to metal ion cerium is After reacting at room temperature for 4 hours, raise the temperature to 55°C, add 2g / L sodium carbonate solution dropwise, adjust the pH to about 6.0-7.0, continue the reaction for 8 hours, cool down to room temperature...

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Abstract

The invention relates to an adsorbent of immobilized rare earth metal cerium and a preparation method thereof. The adopted technical scheme is as follows: the immobilized amount of cerium in an immobilized substrate is 0.06-1.1g / g. The preparation method comprises the following steps: soaking collagen in deionized water under the condition that the mass ratio of the collagen to the deionized water is 3:20-60, adding acids to regulate the pH value to be less than or equal to 2.0, and stirring the mixture at room temperature; adding the cerium ion solution into the mixture under the condition that the mass ratio of the collagen to the cerium is 0.9-14.3:1, stirring the mixture for 2-4h at room temperature, heating the mixture to 35-55 DEG C, dropwise adding alkalis to regulate the pH value to 3.0-8.0, continuously reacting for 4-8h, then cooling the mixture to the room temperature, and stirring the mixture; and taking the collagen body containing cerium out of the mixed solution, flushing the collagen body with deionized water, soaking the collagen body in ethanol, and drying the collagen body in a vacuum mode. The adsorbent prepared by the invention can effectively adsorb and remove harmful inorganic fluoride anions, phosphate radical and arsenate radical in industrial smelting waste water and general water.

Description

technical field [0001] The invention belongs to the technical field of water treatment adsorption, and in particular relates to an adsorbent capable of effectively removing harmful inorganic anions—fluoride ions, phosphate and arsenate—from industrial smelting wastewater and general water bodies, and its preparation. method. Background technique [0002] Fluorine is a double-edged sword for human health, and fluorine content below or exceeding the allowable range will cause great harm to the human body. When the intake of fluoride is insufficient, dental caries is easy to suffer from, but if the water with high fluoride content is drunk for a long time, fluorosis is very easy to occur, and the bone fluorosis caused by it is one of the most widely distributed endemic diseases in the world one. WHO stipulates that the fluoride ion content in drinking water should be less than 1mg / L. Arsenic has carcinogenic, mutagenic and teratogenic effects on the human body and other orga...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/24B01J20/06B01J20/30C02F1/28C02F101/14
Inventor 邓慧李萍
Owner LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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