Preparation method and application of vascular plant based porous oxidative polymerization chelating adsorption material

A technology of oxidative polymerization and chelation adsorption, applied in chemical instruments and methods, adsorption of water/sewage treatment, water pollutants, etc. The effect of improving the adsorption effect

Active Publication Date: 2016-06-15
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the technology of using membrane separation to treat industrial uranium-containing wastewater is not mature enough, and there are still many problems to be solved, such as the selection of membrane materials, the recycling and regeneration performance of separation membranes, and the service life of separation membranes.

Method used

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  • Preparation method and application of vascular plant based porous oxidative polymerization chelating adsorption material
  • Preparation method and application of vascular plant based porous oxidative polymerization chelating adsorption material
  • Preparation method and application of vascular plant based porous oxidative polymerization chelating adsorption material

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Embodiment 1

[0056] (1) Pretreatment of ferns: fresh ferns were first rinsed twice with tap water, then rinsed three times with deionized water, and then rinsed twice with deionized water. Dry the ferns at 65°C, grind them through a 100-mesh sieve with a plant breaker, and store them in ziplock bags.

[0057] (2) Oxidation treatment of ferns: take an appropriate amount of ground ferns and mix them evenly with an oxidant, adjust the pH of the solution to a range of 1.0 to 6.5 with acid and alkali, and put it in a constant temperature water bath at 45°C under a nitrogen atmosphere to stir and react After 8 hours, filter, wash and dry after the reaction. Take 3.0g of the dried sample and add it to 100mL of acetic acid-sodium acetate buffer solution with pH=5.5, then add 3.0g of sodium chlorite and 5.0mL of hydrogen peroxide, react at 20°C for 24 hours, filter, wash and dry to prepare The oxidized plant product CIO is obtained.

[0058] (3) Surface grafting modification: Take 10.0 g of oxidi...

Embodiment 2

[0069] Preparation of oxidative polymeric chelation adsorption materials using nut shells (walnut shells, etc.) and their arsenic adsorption behavior:

[0070] (1) Pretreatment of walnut shells: fresh walnut shells are first rinsed twice with tap water, then rinsed three times with deionized water, and then rinsed twice with deionized water. Dry the walnut shells at 65°C, grind them through a 100-mesh sieve with a plant crusher, and store them in ziplock bags.

[0071] (2) Oxidation treatment of walnut shells: Take an appropriate amount of ground walnut shells and mix them evenly with an oxidizing agent, adjust the pH of the solution to 1.0-6.5 with acid and alkali, and put it in a constant temperature water bath at 45°C under a nitrogen atmosphere and stir for 8 hours. After the reaction, filter, wash and dry. Take 3.0 g of the dried sample and add it to 100 mL of acetic acid-sodium acetate buffer solution with pH=5.5, then add 3.0 g of sodium chlorite and 5.0 mL of hydrogen...

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Abstract

The invention discloses a preparation method and application of a vascular plant based porous oxidative polymerization chelating adsorption material. The adsorption material takes a porous vascular plant as the carrier, and is grafted with a lot of amidoxime groups. The preparation method includes: subjecting the vascular plant to oxidation treatment, then conducting coupling with a double-bond equipped silane coupling agent, then carrying out free radical polymerization reaction with acrylonitrile under the action of an initiator, and finally converting part of a nitrile group into an amidoxime group through hydroxylamine, thus obtaining the adsorption material. The adsorption material has strong hydrophilicity, abundant porous structure and numerous amidoxime groups, and can be applied to removal of heavy metals or radioactive metallic elements from wastewater. The adsorption material shows the characteristics of high adsorption capacity, strong adsorption ability, reproducibility and reusability, and good reuse effect, and is especially suitable for adsorption removal of lead, cadmium, uranium and other metals from wastewater.

Description

technical field [0001] The invention relates to a preparation method and application of a vascular plant-based porous oxidative polymerization chelating adsorption material, in particular to the preparation of a new type of plant by using vascular plants as carriers to carry out oxidation, surface activation, grafting and polymerization. Oxidation-based polymer materials, mainly used in the adsorption of heavy metal ions and radioactive elements in water and soil; belong to the field of natural organic polymer modification. Background technique [0002] The hazards of heavy metals are well known. Heavy metal elements in water and soil enter the ecological environment and food chain through migration and transformation, thereby endangering organisms and human health. Secondly, the radioactive element uranium has an irreplaceable position in national defense security and national economy. Adjusting the energy structure and reducing carbon emissions have brought unprecedented ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/30C02F1/28C02F1/62G21F9/12
CPCB01J20/24C02F1/286C02F2101/20G21F9/12
Inventor 刘耀驰周科王强邱波陈立妙
Owner CENT SOUTH UNIV
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