A kind of phosphorus removal adsorbent and preparation method thereof

A phosphorus adsorbent, phosphate ion technology, applied in chemical instruments and methods, adsorbed water/sewage treatment, other chemical processes, etc., can solve the problems of insufficient strength of ordinary adsorbents, poor adsorption effect, low economic cost, etc. Achieve the effect of realizing a virtuous cycle, simple and stable preparation method, and low economic cost

Active Publication Date: 2022-02-18
浙江省环境科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Aiming at the deficiencies in this field, the present invention provides a method for preparing a phosphorus-removing adsorbent, which uses nano-titanium dioxide to be loaded on an adsorbent based on activated carbon and chitosan, and overcomes the poor adsorption effect of ordinary adsorbents. 1. Ordinary adsorbents have insufficient strength, are not easy to remove, and are easy to cause secondary pollution. To improve the adsorption capacity of the adsorbent, the selected material has low economic cost, can efficiently adsorb phosphate ions in the water body, and effectively increase the wastewater treatment capacity. Realize Environment-Economy Virtuous Circle

Method used

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  • A kind of phosphorus removal adsorbent and preparation method thereof
  • A kind of phosphorus removal adsorbent and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0035] (1) if figure 1 As shown in A and 1B, weigh 3g of the mixture of chitosan and activated carbon with a mass ratio of 1:3, and add it to the acetic acid solution with a mass concentration of 1.2%, to obtain a thick mixed solution;

[0036] (2) Mix sodium hydroxide solution with a mass concentration of 40% and absolute ethanol at a volume ratio of 1:10 to obtain an alkaline stationary solution;

[0037] (3) if figure 1 As shown in C, add the mixed solution dropwise to 80mL of fixative solution to obtain pellets, wash the pellets with distilled water until neutral, and dry to obtain the carrier adsorbent;

[0038] (4) if figure 1 Shown in D, nano-titanium dioxide and sodium dodecylbenzenesulfonate are added in water to obtain a dispersion, the mass concentration of nano-titanium dioxide in the dispersion is 1%, and the concentration of sodium dodecylbenzenesulfonate is 0.017mol / L, Add the carrier adsorbent to the dispersion, heat in a water bath at 60°C, and maintain mag...

Embodiment 2

[0041] (1) Take by weighing 3g mass ratio of chitosan and activated carbon mixture of 1:5, join in the acetic acid solution whose mass concentration is 1.2%, obtain the thick mixed solution;

[0042] (2) Mix sodium hydroxide solution with a mass concentration of 40% and absolute ethanol at a volume ratio of 1:15 to obtain an alkaline stationary solution;

[0043] (3) Add the mixed solution dropwise to 100 mL of fixative solution to obtain pellets, wash the pellets with distilled water until neutral, and dry to obtain the carrier adsorbent;

[0044] (4) adding nano-titanium dioxide and sodium dodecylbenzenesulfonate into water to obtain a dispersion, the mass concentration of nano-titanium dioxide in the dispersion is 2%, and the concentration of sodium dodecylbenzenesulfonate is 0.03mol / L. The carrier adsorbent is added to the dispersion liquid, heated in a water bath at 50°C, and kept under magnetic stirring for 12 hours, with the magnet rotating at 350rpm;

[0045] (5) Filt...

Embodiment 3

[0047] (1) Take 3g of chitosan and activated carbon mixture with a mass ratio of 1:7, and add it to the 1.2% acetic acid solution to obtain a thick mixed solution;

[0048] (2) Mix sodium hydroxide solution with a mass concentration of 40% and absolute ethanol at a volume ratio of 1:20 to obtain an alkaline stationary solution;

[0049] (3) Add the mixed solution dropwise to 110 mL of fixative to obtain pellets, wash the pellets with distilled water until neutral, and dry to obtain the carrier adsorbent;

[0050] (4) adding nano-titanium dioxide and sodium dodecylbenzenesulfonate into water to obtain a dispersion, the mass concentration of nano-titanium dioxide in the dispersion is 1.5%, and the concentration of sodium dodecylbenzenesulfonate is 0.01mol / L. The carrier adsorbent is added to the dispersion liquid, heated in a water bath at 70°C, and maintained for 36 hours under magnetic stirring, with the magnet rotating at 400rpm;

[0051] (5) Filtrate after stirring, wash with...

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Abstract

The invention discloses a preparation method of a phosphorus removal adsorbent, comprising: adding chitosan and activated carbon with a mass ratio of 1:1 to 10 into an acetic acid solution to obtain a mixed solution; mixing sodium hydroxide solution and absolute ethanol Mix at a volume ratio of 1:10-20 to obtain a stationary solution; add the mixed solution dropwise to the stationary solution, wash and dry the precipitate to obtain a carrier adsorbent; add nano-titanium dioxide and a dispersant to water to obtain a dispersion, and adsorb the carrier After the agent is added into the dispersion liquid for loading, the solid is collected by filtration, washed and dried, and calcined at 300-600°C for 2-3 hours to obtain the phosphorus-removing adsorbent. The invention also discloses a phosphorus removal adsorbent prepared according to the above preparation method, which uses nano-titanium dioxide to load on the adsorbent based on activated carbon and chitosan, improves the adsorption capacity, and can efficiently adsorb phosphate radicals in water bodies ion.

Description

technical field [0001] The invention relates to the technical field of phosphorus removal from sewage, in particular to a phosphorus removal adsorbent and a preparation method thereof. Background technique [0002] At present, eutrophication of natural water bodies such as rivers and lakes is very common, and phosphate is the key nutrient element leading to eutrophication. Therefore, it is particularly critical to remove the excessively high concentration of phosphate in water. [0003] For biological cells, phosphate is an important component of molecules in cells, constituting the skeleton of phospholipids, nucleotides, nucleic acids and coenzymes. Therefore, phosphate is a limiting nutrient element. Excessive levels of phosphate in water will lead to a large number of algae and other organisms in the water, which will lead to a series of reactions such as the decrease of dissolved oxygen in the water, the death of aquatic organisms, and the deterioration of the odor of t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/24B01J20/32C02F1/28C02F101/10
Inventor 金仁村程雅菲李桂凤刘颖艺张茜朱冰倩薛苑黄宝成
Owner 浙江省环境科技有限公司
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