Hydrous zirconium oxide/strontium alginate composite gel bead, and preparation method application thereof

A technology of hydrated zirconia and composite gel, which is applied in alkali metal oxides/hydroxides, chemical instruments and methods, and combustible gas purification/transformation, etc., can solve the problems of difficult separation and easy loss of hydrated zirconia, and achieve Low price, easy separation, low filtration resistance

Active Publication Date: 2019-06-07
JINAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The primary purpose of the present invention is to provide a hydrated zirconia / strontium alginate composite gel beads for the problems of existing hydrated zirconia that are difficult to separate and easy to lose.

Method used

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  • Hydrous zirconium oxide/strontium alginate composite gel bead, and preparation method application thereof
  • Hydrous zirconium oxide/strontium alginate composite gel bead, and preparation method application thereof
  • Hydrous zirconium oxide/strontium alginate composite gel bead, and preparation method application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] A preparation method of hydrated zirconia / strontium alginate composite gel beads, comprising the steps of:

[0054] (1) Configure 400mL of ZrCl with a concentration of 0.025mol / L 4 Aqueous solution, in the state of stirring, drop by drop 1mol / L NaOH solution until the pH is 9-10. Continue to react for 10 minutes, stop stirring and let stand for 5 minutes until the white precipitate is complete, pour off the supernatant, add 300 mL of deionized water to wash, repeat the water wash 2 times, fully transfer all the precipitate into a 100 ml volumetric flask, and set the volume to the mark to obtain A hydrated zirconia colloidal dispersion with a concentration of 0.1mol / L.

[0055] (2) Weigh 4.0 g of sodium alginate and dissolve it in water to obtain a 2 wt % sodium alginate solution.

[0056] (3) Take 8mL of the sodium alginate solution prepared in step (2), and 12mL of the hydrated zirconia colloidal dispersion prepared in step (1), stir and mix to obtain the gel bead pr...

Embodiment 2

[0060] A preparation method of hydrated zirconia / strontium alginate composite gel beads, comprising the steps of:

[0061] (1) Prepare 100 mL of zirconium acetate aqueous solution with a concentration of 0.1 mol / L. While stirring, 5 mol / L NaOH solution was added dropwise until the pH was 9-10. Continue to react for 10 minutes, stop stirring and let stand for 5 minutes until the white precipitate is complete, pour off the supernatant, add 100 mL of deionized water to wash, repeat the water wash 2 times, fully transfer all the precipitate into a 100 ml volumetric flask, and set the volume to the mark to obtain A hydrated zirconia colloidal dispersion with a concentration of 0.1mol / L.

[0062] (2) Weigh 4.0 g of sodium alginate and dissolve it in water to obtain a 2 wt % sodium alginate solution.

[0063] (3) Take 8mL of the sodium alginate solution prepared in step (2), and 12mL of the hydrated zirconia colloidal dispersion prepared in step (1), stir and mix to obtain the gel ...

Embodiment 3

[0066] A preparation method of hydrated zirconia / strontium alginate composite gel beads, comprising the steps of:

[0067] (1) Prepare 100 mL of zirconium oxychloride aqueous solution with a concentration of 0.1 mol / L. In the state of stirring, 28wt% concentrated ammonia solution was added dropwise until the pH was 9-10. Continue to react for 10 minutes, stop stirring and let stand for 5 minutes until the white precipitate is complete, pour off the supernatant, add 100 mL of deionized water to wash, repeat the water wash 2 times, fully transfer all the precipitate into a 100 ml volumetric flask, and set the volume to the mark to obtain A hydrated zirconia colloidal dispersion with a concentration of 0.1mol / L.

[0068] (2) Weigh 2.0 g of sodium alginate and dissolve it in water to obtain a 1 wt % sodium alginate solution.

[0069] (3) Take 10mL of the sodium alginate solution prepared in step (2), and 10mL of the hydrated zirconia colloidal dispersion prepared in step (1), st...

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Abstract

The invention relates to a strontium alginate gel bead product coated with hydrous zirconium oxide and an adsorption application of the strontium alginate gel bead product. A hydrous zirconium oxide dispersion liquid is mixed with a sodium alginate water solution according to a certain volume ratio, then the obtained mixture is dropwise added into a strontium salt solution, stirring is carried outto form gel beads, and water washing is carried out to remove excess strontium ions, so that the hydrous zirconium oxide / strontium alginate composite gel beads with a particle size of 0.1-5 mm are obtained. The gel beads can be used for adsorbing and removing anionic pollutants in water. The Langmuir saturated adsorption capacities of the composite gel beads to phosphate micro-polluted water, fluoride micro-polluted water and arsenite micro-polluted water can respectively reach 53 mg / g, 36 mg / g and 61 mg / g. According to the invention, the separation problem of hydrous zirconium oxide can be solved while high adsorption activity of the hydrous zirconium oxide is ensured, and a certain potential application value is achieved in the field of water purification.

Description

technical field [0001] The invention relates to the field of adsorption materials for water purification applications, in particular to a hydrated zirconia / strontium alginate composite gel bead and its preparation method and application. Background technique [0002] With the rapid development of the national economy, the problem of environmental pollution is becoming more and more serious. Lakes, rivers, and groundwater are all polluted to varying degrees in large areas, posing a serious threat to people's health. Phosphate ion, fluoride ion, arsenate ion, etc. are representative types of anion pollutants. Excessive levels of these anionic pollutants can cause water eutrophication, fluorosis, and arsenic poisoning. At present, chemical precipitation, membrane separation and other methods are generally used to effectively remove high-concentration polluted water, but for slightly polluted water, these methods are often too expensive and inconvenient to use. [0003] Adsor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/28B01J20/34B01J20/30
Inventor 李战军黄宣旗夏嫣李万斌
Owner JINAN UNIVERSITY
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