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Gel for recovering phosphorus from water and preparation method and application thereof

A manufacturing method and technology for recycling water, applied in chemical instruments and methods, other chemical processes, adsorption water/sewage treatment, etc., can solve problems such as difficult operation and recycling, achieve high removal rate, improve adsorption capacity, and enhance mechanical strength and chemical stability

Active Publication Date: 2017-05-24
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, lanthanum oxide is in powder form, and it is difficult to handle and recycle when it is directly applied to water treatment.

Method used

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  • Gel for recovering phosphorus from water and preparation method and application thereof
  • Gel for recovering phosphorus from water and preparation method and application thereof
  • Gel for recovering phosphorus from water and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 1) Dissolve 4.0g polyvinyl alcohol (PVA) in water, stir mechanically and heat in a water bath to form solution I, weigh 2.0g sodium alginate (SA) and dissolve it in 48mL deionized water and magnetically stir to form solution II, weigh 1.0 g of lanthanum hydroxide was dissolved in 49 ml of water and stirred magnetically to form solution III, then preferably, lanthanum hydroxide was ultrasonically stirred for 1 hour and then continued to stir; then solution I, solution II and solution III were mixed, Stir mechanically until completely mixed to form a mixture I;

[0022] 2) Add the resulting mixed solution I to a mixture containing 4wt% boric acid and 3wt% AlCl 3 Cross-linking in the mixed solution II for 10 hours;

[0023] 3) The obtained gel was repeatedly rinsed with deionized water and soaked for 2 hours to remove unreacted monomers and a small amount of impurities.

Embodiment 2

[0025] 1) Dissolve 2.0g polyvinyl alcohol (PVA) in water, stir mechanically and heat in a water bath to form solution I, weigh 1.0g sodium alginate (SA) and dissolve it in 49mL deionized water and magnetically stir to form solution II, weigh 1.0 g of lanthanum hydroxide was dissolved in 49 ml of water and stirred magnetically to form solution III, then preferably, lanthanum hydroxide was ultrasonically stirred for 1 hour and then continued to stir; then solution I, solution II and solution III were mixed, Stir mechanically until completely mixed to form a mixture I;

[0026] 2) Add the resulting mixed solution I to a mixture containing 2wt% boric acid and 1wt% AlCl 3 Cross-linking in the mixed solution II for 14 hours;

[0027] 3) Wash the obtained gel repeatedly with deionized water and soak for 1 hour to remove unreacted monomers and a small amount of impurities.

Embodiment 3

[0029] 1) Dissolve 3.5g polyvinyl alcohol (PVA) in water, stir mechanically and heat in a water bath to form solution I, weigh 1.5g sodium alginate (SA) and dissolve it in 48.5mL deionized water and magnetically stir to form solution II, weigh Take 1.0g of lanthanum hydroxide dissolved in 49ml of water and magnetically stir to form solution III, then preferably, lanthanum hydroxide is ultrasonicated for 1 hour while stirring and then continue to stir; then solution I, solution II and solution III are mixed , mechanically stirred until completely mixed to form a mixed liquid I;

[0030] 2) Add the resulting mixed solution I to a mixture containing 3wt% boric acid and 2wt% AlCl 3 Cross-linking in the mixed solution II for 12 hours;

[0031] 3) Wash the obtained gel repeatedly with deionized water and soak for 3 hours to remove unreacted monomers and a small amount of impurities.

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Abstract

The invention belongs to the fields of wastewater treatment and high-molecular materials, and discloses a preparation method of gel for recovering phosphorus from water. The preparation method comprises the following steps: 1) dissolving polyvinyl alcohol in water completely to form a solution I, dissolving sodium alginate in deionized water completely to form a solution II, dissolving lanthanum hydroxide in water completely to form a solution III, and mixing the solution I, the solution II and the solution III to form a mixed liquor I; 2) adding the obtained mixed liquor I into mixed liquor II, performing a cross-linking reaction on the polyvinyl alcohol and the sodium alginate to form a polymer interpenetrating network structure, and embedding the lanthanum hydroxide in the polymer interpenetrating network structure to obtain gel; 3) flushing the obtained gel with deionized water repeatedly. In the preparation method, the lanthanum hydroxide is embedded into a copolymer of the polyvinyl alcohol and the sodium alginate by using the balling performance of the sodium alginate, the stability of the polyvinyl alcohol and the affinity of the lanthanum hydroxide to the phosphorus, so that an environment-friendly phosphorus recovering material is prepared.

Description

technical field [0001] The invention belongs to the field of waste water treatment and polymer materials, and more specifically relates to a gel for recovering phosphorus in water, its manufacturing method and application. Background technique [0002] In recent years, the large amount of discharge of agricultural runoff, industrial wastewater and municipal sewage has led to excessive phosphorus content in water bodies. Excessive phosphorus in water bodies is the main cause of water eutrophication and algal blooms. At the same time, phosphorus is also one of the elements necessary for life activities, and the consumption of phosphorus in industry and agriculture is also increasing year by year. However, it is difficult to recycle the phosphorus that enters the water body back to the land to realize the phosphorus cycle, and the available phosphorus resources in nature, such as phosphate rock, are also non-renewable. [0003] There are many methods for phosphorus removal, wh...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/28B01J20/30C02F1/28
Inventor 周爱姣朱畅陶涛罗凡冯晓楠陈王伟李崇武廖磊杨正委熊斌
Owner HUAZHONG UNIV OF SCI & TECH
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