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Composite adsorbing material for removing fluorine ions in water and preparation method thereof

A composite adsorption material and fluoride ion technology, applied in chemical instruments and methods, adsorption water/sewage treatment, other chemical processes, etc., can solve the problems of low fluoride removal rate, regular cleaning, high investment cost, etc., and achieve large adsorption capacity , Strong regenerative ability, easy to use

Inactive Publication Date: 2013-01-16
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when using electrodialysis to remove fluorine, the current must be controlled above the limiting current point, otherwise the fluorine removal rate will be low
At the same time, the water needs to be pretreated during electrodialysis to remove fluorine, and the investment cost is high, and the equipment needs to be cleaned regularly

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0022] Take 20g of zirconium oxychloride and put it in a 150ml beaker, dissolve it with water, add 150% sodium hydroxide to adjust the pH to weakly alkaline, and a large amount of white precipitate is produced. After heating and activation, suction filtration and washing with distilled water until neutral. Finally, put the white solid into an oven, bake it at 100°C for 1 hour, take it out, cool it, and crush it for later use. Crush the water hyacinth, dry it, weigh 5g of the raw material, add 40ml of 20% NaOH solution, stir and alkalize at 25°C for 80min, centrifuge, pour out and recover the upper layer of night, the lower solid is the alkali Cellulose. Transfer the alkali fiber into the Erlenmeyer flask, add 40ml of 10% NaOH solution to adjust the pH to neutral, add 3g of zirconia powder weighed, stir for 70min, and then add 5ml of 5% MgSO 4 Solution, stirring, centrifuging the mixture, drying and pulverizing to obtain a new type of composite adsorption material.

example 2

[0024] Take 25g of zirconium oxychloride and put it into 150ml burning standard, dissolve it with water, add 20% sodium hydroxide to adjust the pH to weakly alkaline, and a large amount of white precipitate is produced. After heating and activation, suction filtration and washing with distilled water until neutral. Finally, put the white solid into an oven, bake at 110°C for 2h, take it out, cool, and crush for use. Crush the water hyacinth, dry it, weigh 10g of the raw material, add 50ml of 25% NaOH solution, stir and alkalize at 30°C for 90min, centrifuge, pour out and recover the upper layer of night, the lower solid is the alkali Cellulose. Transfer the alkali fiber into the Erlenmeyer flask, add 40ml 15% NaOH solution to adjust the pH to neutral, add 4g weighed zirconia powder, stir for 80min, then add 10ml 5% MgSO 4 Dissolve the night, stir, centrifuge, dry, and crush the mixture to obtain a new type of composite adsorption material.

example 3

[0026] Put 20g of zirconium oxychloride into a 150ml beaker, dissolve it with water, add 15% sodium hydroxide to adjust the pH to weakly alkaline, and a large amount of white precipitate will be generated. After heating and activation, suction filtration is carried out and washed with distilled water to neutrality. Finally, put the white solid in an oven, bake at 110°C for 2h, take it out, cool it, smash it for later use, grind the water hyacinth, dry it, weigh 8g of the raw material and add 50ml of 20% NaOH solution, Stir and alkalize at ℃ for 85min, centrifuge, pour out and recover the upper layer of night, the lower layer of solid matter is alkali cellulose. Transfer the alkali fiber into the triangle, add 40ml of 10% NaOH solution to adjust the pH to neutral, add 5g of zirconia powder weighed, stir for 75min, and then add 7ml of 5% MgSO 4 Solution, stirring, centrifuging the mixture, drying and pulverizing to obtain a new type of composite adsorption material.

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PUM

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Abstract

The invention discloses a novel and efficient composite adsorbing material obtained by loading active zirconium oxide on eichhornia crassipes celluloses, which belongs to the field of water treatment. The invention also discloses a method of using the eichhornia crassipes celluloses loaded with zirconium oxide to remove the fluorine ions in the water, i.e., adsorbing the fluorine ions through the eichhornia crassipes celluloses loaded with zirconium oxide under any condition. In the invention, the adopted adsorbing method used for removing the fluorine ions in the water has the regenerability obviously superior to the traditional method. In addition, the invention is simple to operate, easy to obtain the materials, low in cost, large in exchange capacity, high in treatment effect and free from the interference of other ions. Therefore, the novel composite adsorbing material provided by the invention is utilized to remove the fluorine ions in the domestic waste water and industrial waste water, and has good economic and environmental benefits.

Description

Technical field [0001] The invention relates to a composite adsorption material for removing fluoride from water and a preparation method thereof, in particular to a novel material prepared by the combination of active zirconia and water hyacinth fiber cord, belonging to the field of water purification treatment. Background technique [0002] Fluorine is commonly found in plant tissues and is an essential element. However, too much fluorine can inhibit the metabolism, respiration and photosynthesis of crops. Fluorine can also inhibit the decomposition of soil cellulose, soil digestion and respiration intensity. Fluorine is one of the essential trace elements of the human body and one of the main components that make up the teeth and bones of humans and other animals. However, the safety range of fluorine in the human body is very narrow. If the fluorine content is higher than 1.5mg / L for long-term consumption Water can cause dental fluorosis or skeletal fluorosis and chronic fl...

Claims

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Application Information

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IPC IPC(8): B01J20/24B01J20/30C02F1/28C02F1/58
Inventor 雷春生陈蓉蓉雷思宇
Owner CHANGZHOU UNIV
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