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Manganese dioxide/active aluminum oxide composite adsorbing material and its preparation method

A composite adsorption material and activated alumina technology, applied in the direction of alkali metal oxides/hydroxides, chemical instruments and methods, alkali metal compounds, etc., can solve the problem of large usage, limited application of activated alumina, and activated alumina adsorption The problem of low capacity

Inactive Publication Date: 2007-10-24
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the adsorption capacity of activated alumina is not high. When the fluorine content in water is high (greater than 2mg / L), the amount of use is relatively large, which greatly limits the application of activated alumina.

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] A kind of manganese dioxide / activated alumina composite adsorption material, its preparation method is:

[0014] (1) Activated alumina pretreatment; sieve the activated alumina particles with a particle size of 20-40 objects, rinse them repeatedly with deionized water for 2-3 times, and then dry them for later use;

[0015] (2) Take 6g of the above-mentioned pretreated activated alumina, add it to 50mL deionized water and stir, then add 0.015mol (CH 3 COO) 2 Mn 4H 2 O, stirred for 20min; then added 100mL of KMnO with a concentration of 0.045mol / L 4 solution, the color of the solution immediately changed to brown-black, indicating that MnO 2 generate;

[0016] (3) The suspension is discarded, and the remaining granular composite adsorption material is repeatedly washed with deionized water until the eluate is clarified, and finally dried to obtain the finished product;

Embodiment 2

[0018] (1) Activated alumina pretreatment; sieve the activated alumina particles with a particle size of 20-40 objects, rinse them repeatedly with deionized water for 2-3 times, and then dry them for later use;

[0019] (2) Take 10 g of the above-mentioned pretreated activated alumina, add it to 50 mL of deionized water for stirring, and then add 0.020 mol (CH 3 COO) 2 Mn 4H 2 O, stirred for 20min; then added 100mL concentration of 0.065mol / LKMnO 4 solution, the color of the solution immediately changed to brown-black, indicating that MnO 2 generate;

[0020] (3) The suspension is discarded, and the remaining granular composite adsorption material is repeatedly washed with deionized water until the eluate is clarified, and finally dried to obtain the finished product;

Embodiment 3

[0022] (1) Activated alumina pretreatment; sieve the activated alumina particles with a particle size of 20-40 objects, rinse them repeatedly with deionized water for 2-3 times, and then dry them for later use;

[0023] (2) MnO 2 Loading; Take 10g of the above-mentioned pretreated activated alumina, add it to 50mL deionized water and stir, then add 0.020mol (CH 3 COO) 2 Mn 4H 2 O, stirred for 20min; then added 250mL concentration of 0.085mol / LKMnO 4 solution, the color of the solution immediately changed to brown-black, indicating that MnO 2 generate;

[0024] (3) The suspension is discarded, and the remaining granular composite adsorption material is repeatedly washed with deionized water until the eluate is clear, and finally dried to obtain the finished product.

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PUM

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Abstract

The invention relates to the battery manganese water processing technology, with dark brown appearance, BET specific surface area being 315. 543 m2 / g, particle radius 20-40 , by screening active alumina granules with particle radius being 20-40 , cleaning with ion removal water for two to three times, and drying it for further usage, getting the above processed alumina granules for 6-10g, adding them to 50ml ion removal water for twisting, adding 0. 015-0. 020mol (CH3COO)2Mn.4H2O, twisting for 20min, then adding KMnO4 solution 100-250mL with density of 0. 045-0. 085mol / L, seeing the solution turned into dark brown and generated into MnO2, abandoning the suspended solution, leaving the particle compound absorbent ion till the pure solution coming ut, drying it to get the absorbent.

Description

(1) Technical field [0001] The invention relates to a manganese dioxide / activated alumina composite adsorption material and a preparation method thereof, belonging to the technical field of water treatment. (2) Background technology [0002] Fluorine is one of the essential trace elements for human body. Insufficient or too much fluorine intake by the human body from the outside world will affect the health of the body. Fluorine deficiency is prone to dental caries, and drinking water with high fluoride content for a long time will cause excessive accumulation of fluorine in the body, which will lead to chronic fluorosis. my country's drinking water hygiene standards stipulate that the fluorine content in drinking water shall not exceed 1.0mg / L. [0003] my country is a country with serious fluoride hazards, with a population of about 200 million in fluorosis areas, and endemic fluorosis in drinking water is the main manifestation of fluoride hazards. On the other hand, t...

Claims

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Application Information

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IPC IPC(8): B01J20/28B01J20/08B01J20/30C02F1/28C02F1/58
Inventor 王曙光滕少香巩文信刘贤伟
Owner SHANDONG UNIV
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