Preparation method and application of fluorine removal material

Abstract

The present invention discloses a preparation method of a fluorine removal material. The method is as follows: soil of reed stems is removed; the soil removed reed stems are washed; the washed reed stems are air-dried; the air-dried reed stems are crushed; the crushed reed stems are sieved; then an acid liquid is added; heating reflux is conducted; acidolysis de-sugarization is conducted; then a solid-liquid separation is conducted to obtain an acidolysis residue; the acidolysis residue is rinsed with deionized water until neutral; the rinsed acidolysis residue is dried; and finally, the driedacidolysis residue is puffed to obtain the fluorine removal material. The present invention also discloses a method for applying the fluorine removal material to remove fluoride ions in water. The method is as follows: firstly, the fluorine removal material is added into fluorine-containing waste water to be stirred to obtain a mixture solution; the mixture solution is put still; then an inorganic flocculating agent is added; the mixture is put still; finally, a flocculation aid is added; and the mixture is put still. The reed stems after the de-sugarization are puffed; the surface area of the fluorine removal material is greatly increased; fluorine adsorption sites in the fluorine removal material are increased; and fluorine adsorption amount of the fluorine removal material is improved.The fluorine removal material is applied to remove the fluoride ions in the water, further strengthens the fluorine removal effect, and is less in adverse residues, green and environmentally-friendly.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to a preparation method and application of a fluorine removal material. Background technique [0002] Fluorine is a common halogen element in nature and one of the essential trace elements for human body. A small amount of fluoride ion is beneficial to the human body, but when the mass concentration of fluoride ion is greater than 1.5mg / L, it will have adverse effects on the human body, and it will also cause poisonous effects on plants. According to investigations, 80% of fluoride ions in water can be directly absorbed by the human body, and drinking water is the main source of fluoride ions for human beings. Therefore, the removal of fluoride ions in drinking water has attracted people's attention. my country's "Drinking Water Standards" stipulates that the fluorine content in drinking water should be below 1.0mg / L. [0003] At present, the main treatment met...

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Problems solved by technology

Xu Haiyang et al. used HCl to desugar the roots, stems, and leaves of reeds to prepare defluoridation agents. The defluoridation effect was remarkable, and the defluoridation effect of the roots was the best. However, in practical applications, the roots of reeds are difficult to obtain, and compared to The amount of stems and leaves is small, and there is no other optimization process after acid solution and sugar removal, so the effect of fluoride removal is limited (Xu Haiyang. Research on the performance of reed residues to adsorb fluoride ions in water[D], Chang'an University, 2017.)

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