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A kind of preparation method and application of zirconium modified chitosan microspheres

A chitosan microsphere, chitosan technology, applied in chemical instruments and methods, other chemical processes, water/sludge/sewage treatment, etc., can solve the problems of complex preparation process, decreased adsorption performance, large amount of organic solvents, etc. , to achieve the effect of simple preparation process, stable properties and easy operation

Active Publication Date: 2022-03-01
SOUTHWEST PETROLEUM UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The preparation process of these cross-linking modifications is quite complicated and requires a large amount of organic solvents, which is prone to secondary pollution and sometimes leads to a decline in adsorption performance.
In addition, some adsorbents in the existing patents are difficult to separate solids and liquids after adsorption

Method used

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  • A kind of preparation method and application of zirconium modified chitosan microspheres
  • A kind of preparation method and application of zirconium modified chitosan microspheres
  • A kind of preparation method and application of zirconium modified chitosan microspheres

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Experimental program
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Effect test

Embodiment 1

[0025] The preparation of embodiment 1 zirconium modified chitosan microsphere adsorbent

[0026] Dissolve 1g of chitosan in 100ml of 3% acetic acid solution and stir until the chitosan is completely dissolved. Then mix 2mL of ethanol with chitosan solution under vigorous stirring; after the air bubbles disappear completely, drop chitosan into 0.35mol / L NaOH solution with a syringe to solidify chitosan microspheres; when the chitosan microspheres are completely After becoming a white spherical shape, it was washed with deionized water until neutral. Soak the washed chitosan microspheres in 3% epichlorohydrin ethanol solution for 18h, and wash twice with deionized water. Prepare 50 mL of zirconium nitrate solution with a concentration of 0.075 mol / L, and soak chitosan microspheres in it for 12 hours; rinse zirconium-modified chitosan microspheres with deionized water to remove residual zirconium nitrate solution. After curing in 3% epichlorohydrin ethanol solution for 5 hours...

Embodiment 2

[0027] The preparation of embodiment 2 zirconium modified chitosan microsphere adsorbent

[0028] Dissolve 1g of chitosan in 150ml of 5% acetic acid solution and stir until the chitosan is completely dissolved. Then 3 mL of ethanol and chitosan solution were mixed under vigorous stirring; after the bubbles completely disappeared, the chitosan was dropped into 0.50mol / L NaOH solution with a syringe to solidify to form chitosan microspheres; when the chitosan microspheres were completely After becoming a white spherical shape, it was washed with deionized water until neutral. Soak the washed chitosan microspheres in 5% epichlorohydrin ethanol solution for 24h, and wash twice with deionized water. Prepare 50mL zirconium nitrate solution with a concentration of 0.14mol / L, and impregnate chitosan microspheres in it for 8h. The zirconium-modified chitosan microspheres were rinsed with deionized water to remove residual zirconium nitrate solution. After curing in 5% epichlorohydri...

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Abstract

The invention discloses a preparation method and application of zirconium-modified chitosan microspheres, belonging to the technical field of water pollution control. The invention prepares chitosan microspheres at normal temperature, and then loads zirconium ions on the surface of chitosan microspheres to obtain zirconium-modified chitosan microspheres. The zirconium-modified chitosan microspheres provided by the invention have simple preparation process, low energy consumption and easy operation; the prepared adsorbent has stable properties and can be used in a wide pH range; the zirconium-modified chitosan microspheres provided by the invention The surface of sugar microspheres is not only rich in ‑OH and ‑NH 2 Active groups such as zirconium ions that also have an adsorption effect on Cr(VI) can be used to adsorb and remove Cr(VI) in water.

Description

technical field [0001] The invention relates to the technical field of water pollution control, in particular to a preparation method and application of zirconium-modified chitosan microspheres. Background technique [0002] Heavy metal chromium is one of the priority pollutants in my country, mainly from leather manufacturing, printing and dyeing technology, iron and steel smelting and other industries. Chromium-containing wastewater exists in the form of trivalent and hexavalent compounds, and Cr(VI) is much more toxic than Cr(III), and will enter the human body through the accumulation of the food chain, destroying the normal metabolism of cells, and has strong carcinogenic and mutagenic effects. [0003] At present, the treatment methods of chromium-containing wastewater mainly include chemical precipitation method, ion exchange method, membrane separation method, photocatalytic method, electrochemical method, biological method, adsorption method and so on. The chemical...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/24B01J20/28B01J20/30C02F1/28C02F101/22
CPCB01J20/24B01J20/28021B01J20/02C02F1/286C02F2101/22
Inventor 杨晓婷兰贵红张英婷邱海燕张太亮
Owner SOUTHWEST PETROLEUM UNIV