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A kind of preparation method of metal-modified humic acid defluorination adsorption material

An adsorption material and humic acid technology, applied in chemical instruments and methods, adsorption water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of low mechanical strength and poor fluorine selectivity, and achieve low price and high adsorption The effect of high efficiency, obvious economic benefits and environmental benefits

Inactive Publication Date: 2016-08-24
SICHUAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among these different adsorption materials for fluorine removal, natural organic polymer adsorption materials are attracting more and more attention due to their wide range of sources, large specific surface area, and environmental friendliness, but their mechanical strength is low and their selectivity to fluorine is poor.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Example 1: Prepare 10 g of humic acid with sodium hydroxide and deionized water to prepare 0.2 L of sodium humate solution with pH=13. In a 0.5L reactor, add 10g of aluminum nitrate powder and 1g of zirconyl nitrate powder, add 0.1L of deionized water to dissolve, and add 0.2L of For the prepared sodium humate solution, use sodium hydroxide and nitric acid to adjust the pH of the mixed solution to 7.5~7.8, stir at 65~70°C (stirring speed 220r / min) for 30 min, cool to room temperature, centrifuge, and use 0.5 Wash with L deionized water for 3 times, put the centrifuged solid into a vacuum freeze dryer, and dry it for 24 hours at a cold trap temperature of -60°C and a vacuum of 1 Pa. After drying, the product is ground to obtain a metal-modified Humic acid defluoridation adsorption material. When the pH of the wastewater is 7, the water temperature is 20°C, the dosage is 5g / L, and the adsorption time is 6h, when the adsorption material is used to treat fluorine-containin...

Embodiment 2

[0013] Example 2: 40 g of humic acid was formulated with sodium hydroxide and deionized water into a 0.8 L, pH=13 sodium humate solution. In a 2L reaction kettle, add 20g of aluminum nitrate and 8g of zirconium oxynitrate powder, add 0.4L of deionized water to dissolve, and add 0.8L of the For the prepared sodium humate solution, use sodium hydroxide and nitric acid to adjust the pH of the mixed solution to 6.5~6.7, continue to stir at 50~55°C (stirring speed 150r / min) for 90 min, cool to room temperature, centrifuge, and use 1L to remove Wash with ionic water for 3 times, put the solid obtained by centrifugation into a vacuum freeze dryer, dry for 12 hours at a cold trap temperature of -45°C, and a vacuum of 5 Pa, and grind the dried product to obtain metal-modified humic acid Fluorine removal adsorption material. When the pH of the wastewater is 7, the water temperature is 20°C, the dosage is 5g / L, and the adsorption time is 6h, when the adsorption material is used to treat...

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PUM

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Abstract

The invention introduces a preparation method of metal-modified humic acid defluoridation adsorption material, which is characterized in that humic acid is prepared into sodium humate solution with sodium hydroxide and water, and aluminum nitrate and zirconyl nitrate are dissolved in acid and alkali resistant Add the prepared sodium humate solution into the container under vigorous stirring, adjust the pH value of the mixed solution in the container to the set value with sodium hydroxide and nitric acid, and carry out the polymerization reaction of the material, and the polymerization reaction ends Afterwards, solid-liquid separation is carried out, and the solid is washed, freeze-dried and pulverized to obtain the desired adsorption material. The preparation method has the characteristics of easy process operation, low product cost and short production cycle, and the prepared adsorption material has good adsorption and removal effect on fluorine ions in water.

Description

technical field [0001] The invention relates to a method for preparing a fluorine-removing adsorption material by using humic acid as a raw material. Background technique [0002] Fluorine is an important chemical raw material. Fluorine and related fluorides are widely used in coke, glass, fertilizer, electroplating, electronics, pesticides, solar cells and other industries. During the production and application of fluoride, a large amount of high-concentration fluorine-containing wastewater will be generated, causing environmental pollution. Fluorine pollution has drawn more and more people's attention. If it is not handled properly, it will cause serious harm to human health and water environment safety. In order to protect the living environment of human beings and improve people's quality of life, the research on defluoridation of fluorine-containing wastewater is an important task in the field of environmental protection and hygiene at home and abroad. [0003] There ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/26B01J20/30C02F1/28C02F1/58
CPCY02W10/37
Inventor 刘咏赵丽娟刘娅汪诗翔刘若娟
Owner SICHUAN NORMAL UNIV