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A kind of method using sodium humate to prepare defluoride adsorption material

An adsorption material, a technology of sodium humate, applied in chemical instruments and methods, adsorption water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of limited adsorption capacity, poor selectivity and high treatment cost, and achieve obvious Economic and environmental benefits, high adsorption capacity and selectivity, effect of mild reaction conditions

Inactive Publication Date: 2015-09-09
SICHUAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, natural polymer adsorbents have a wide range of sources, but their preparation process is complicated, their mechanical strength is poor, and their selectivity is poor; although aluminum-containing inorganic adsorbents are cheap and simple in preparation technology, their adsorption capacity is limited; although rare earth adsorbents have good selectivity, they also have relatively high High adsorption capacity, but expensive, high processing costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Example 1: In a 2L reaction kettle, add 50g of aluminum chloride powder, add 1L of distilled water to dissolve, add 50g of sodium humate under the conditions of reaction temperature of 60~65°C and stirring (stirring speed 120r / min), and use hydrogen Sodium oxide adjusts the pH of the mixed solution to 7.8~8.0, continue to add 0.1L of lanthanum nitrate solution with a mass fraction of 50%, stir at 60~65°C (stirring speed 120r / min) for 30 min, cool to room temperature, and centrifuge. Wash 3 times with 1L of deionized water, dry the solid obtained by centrifugation at 70°C, and grind the product after drying to obtain a modified sodium humate defluorination adsorption material. When the pH of the wastewater is 7, the water temperature is 20°C, the dosage is 10g / L, and the adsorption time is 6h, when the adsorption material is used to treat fluorine-containing wastewater with an initial concentration of fluoride ions of 60mg / L, the removal efficiency of fluoride ions is as ...

Embodiment 2

[0012] Example 2: In a 0.5L reactor, add 7.5g of aluminum chloride powder, add 0.1L of distilled water to dissolve, and add 10g of humic acid under the conditions of reaction temperature 50~55°C and stirring (stirring speed 180r / min) , use sodium hydroxide solution to adjust the pH of the mixed solution to 6.2~6.5, continue to add 0.01L of lanthanum nitrate solution with a mass fraction of 50%, continue to stir at 50~55°C (stirring speed 180r / min) for 30 minutes, and cool to Centrifuge at room temperature, wash 3 times with 0.2L deionized water, dry the solid obtained by centrifugation at 65°C, and grind the product after drying to obtain a modified sodium humate defluorination adsorption material. When the pH of the wastewater is 7, the water temperature is 20°C, the dosage is 10g / L, and the adsorption time is 6h, when the adsorption material is used to treat fluorine-containing wastewater with an initial concentration of fluoride ions of 30mg / L, the removal efficiency of fluo...

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Abstract

The invention discloses a method for preparing a defluorination absorption material by using sodium humate. The method comprises the following steps: dissolving aluminum chloride into an acid-base resisting container, adding the sodium humate into the container under severe stirring, adjusting the pH value of the solution in the container to be a set value by using sodium hydroxide and hydrochloric acid, further adding lanthanum nitrate powder into the container, carrying out polymerization reaction on the materials, after the polymerization reaction is accomplished, carrying out solid-liquid separation, and washing, drying and crushing the solid so as to obtain the expected absorption material, wherein the mass ratio of the aluminum chloride to the sodium humate is (1:1)-(1:2), the mass ratio of the lanthanum nitrate to the sodium humate is (1:1)-(1:2), the stirring speed is 100-200r / min, the temperature of the whole polymerization reaction process is 50-70 DEG C, the pH value of the solution is 6-8; the polymerization time of the materials is 20-30 minutes, and the temperature for drying the solid is 50-70 DEG C. The method has the characteristics that the process is simple, the operation is convenient and the production period is short; the prepared absorption material has a good absorption and elimination effect on fluorinion in water.

Description

technical field [0001] The invention relates to a method for preparing a fluorine-removing adsorption material by using sodium humate as a raw material. Background technique [0002] Fluoride is widely used, and a large amount of fluoride-containing wastewater will be generated during the production and application of fluoride. Excessive intake of fluorine will damage human health and cause some fluorosis symptoms such as skeletal fluorosis and dental plaque. High fluorine will have adverse effects on the reproductive function of animals and the growth and development of plants. Based on the harm of fluoride to animals and plants, the discharge of fluoride ions into water bodies must be controlled to ensure people's normal production and life. For this reason, my country's comprehensive sewage discharge standard (GB8978-1996) stipulates that the discharge concentration of fluoride ions should not exceed 10mg / L. Many fluorine-containing industrial wastewaters need to be eff...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/24B01J20/30C02F1/28C02F1/58
Inventor 刘咏刘娅刘若娟
Owner SICHUAN NORMAL UNIV