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A kind of preparation method of lanthanum hydroxide modified airgel dephosphorization adsorbent

A lanthanum hydroxide and phosphorus adsorbent technology, applied in the field of water pollution treatment, can solve problems such as low mechanical properties and limited application, and achieve the effects of good mechanical properties, fast adsorption speed, and realization of reuse.

Active Publication Date: 2022-06-21
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the low mechanical properties of metal-crosslinked biopolymer composites limit their further applications.

Method used

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  • A kind of preparation method of lanthanum hydroxide modified airgel dephosphorization adsorbent
  • A kind of preparation method of lanthanum hydroxide modified airgel dephosphorization adsorbent
  • A kind of preparation method of lanthanum hydroxide modified airgel dephosphorization adsorbent

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specific Embodiment approach 1

[0037] Embodiment 1: The preparation method of the lanthanum hydroxide modified aerogel dephosphorization adsorbent of the present embodiment is carried out according to the following steps:

[0038] 1. Synthesis of lanthanum hydroxide modified hydrogel beads:

[0039] 1. Dissolve graphene oxide in deionized water and ultrasonically disperse it to obtain a graphene oxide dispersion;

[0040] 2. Dissolving lanthanum hydroxide in deionized water to obtain an aqueous solution of lanthanum hydroxide; dissolving sodium alginate in deionized water to obtain an aqueous solution of sodium alginate;

[0041] 3. Mix the dispersion of graphene oxide, the lanthanum hydroxide aqueous solution and the sodium alginate aqueous solution, and vigorously stir at room temperature to obtain a mixed solution;

[0042] 4. Under normal temperature conditions, dropwise add the aqueous crosslinking agent solution to the mixed solution obtained in step 3 to obtain hydrogel beads, and then stand for 18 ...

specific Embodiment approach 2

[0048] Embodiment 2: The difference between this embodiment and Embodiment 1 is: Step 1 ① The ultrasonic dispersion process is: ultrasonic for 10min-30min under the ultrasonic power of 100W-500W.

specific Embodiment approach 3

[0049] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that: Step 1 ① The mass fraction of graphene oxide in the graphene oxide dispersion liquid is 0.2-0.5%.

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Abstract

The invention discloses a preparation method of a lanthanum hydroxide modified airgel dephosphorization adsorbent, relating to a preparation method of a dephosphorization adsorbent. The purpose is to solve the problems of low saturation adsorption capacity of the current phosphorus removal adsorbent, difficulty in recovery and reuse after adsorption, and low mechanical properties. Preparation method: Mix graphene oxide dispersion, lanthanum hydroxide aqueous solution and sodium alginate aqueous solution and stir vigorously, add crosslinking agent aqueous solution drop by drop to obtain water coagulation beads, crosslink and solidify after standing, and finally wash and wash in sequence dry. The adsorbent of the invention can be reused, has low cost, fast adsorption speed, high adsorption capacity and good mechanical properties. The invention is suitable for preparing the phosphorus removal adsorbent.

Description

technical field [0001] The invention belongs to the technical field of water pollution treatment, and in particular relates to a preparation method of a phosphorus removal adsorbent. Background technique [0002] Phosphorus is an essential and non-renewable vital nutrient for biological growth. However, excessive phosphate discharge can cause severe eutrophication in water bodies. This may lead to the reduction of dissolved oxygen, the formation of a large number of algal toxins, which can cause abnormal reproduction of algae and other aquatic plants, and eventually lead to the collapse of the ecosystem, posing a huge threat to human health. Therefore, it is of great significance to effectively remove and recover phosphates in water bodies. [0003] So far, phosphorus removal methods are various, including biological method, chemical precipitation method, ion exchange method, membrane treatment method, adsorption method, etc. Among these methods, adsorption is considered ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/24B01J20/28B01J20/30C02F1/28C02F101/10
CPCB01J20/06B01J20/20B01J20/24B01J20/28047C02F1/281C02F1/283C02F1/286B01J2220/4806B01J2220/4825B01J2220/46C02F2101/105
Inventor 南军刘博涵
Owner HARBIN INST OF TECH
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