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Environmentally friendly nanofiber material and preparation method thereof for fast adsorption of heavy metal ions

A technology for adsorbing heavy metals and nanofibers, which is applied in chemical instruments and methods, adsorbed water/sewage treatment, other chemical processes, etc., can solve the problem that the adsorption performance of heavy metal ions has not been greatly improved, the preparation method is complex and uneconomical Environmental protection and other issues, to achieve the effect of excellent heavy metal ion adsorption performance, increased specific surface area and porosity, and excellent specific surface area

Active Publication Date: 2021-11-12
YIYANG SHENGLI CHEM IND
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above-mentioned porous carbon nanofiber membranes do not have the ability to regenerate, are not economical and environmentally friendly, and the adsorption performance of heavy metal ions has not been greatly improved, which cannot meet the needs of practical applications.
At the same time, the preparation method is complicated, the preparation raw materials are not environmentally friendly, and the secondary pollution caused by the porous carbon nanofiber membrane adsorption material to the environment cannot be effectively avoided.

Method used

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  • Environmentally friendly nanofiber material and preparation method thereof for fast adsorption of heavy metal ions
  • Environmentally friendly nanofiber material and preparation method thereof for fast adsorption of heavy metal ions
  • Environmentally friendly nanofiber material and preparation method thereof for fast adsorption of heavy metal ions

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preparation example Construction

[0035] see figure 1 As shown, the present invention provides a kind of preparation method of the environment-friendly nanofibrous material of fast adsorption heavy metal ion, comprises the steps:

[0036] S1, put waste cotton-containing fibers in dimethylimidazole solution, soak for 8-16 hours, then add zinc nitrate hexahydrate solution and fully stir and mix to obtain a reaction system, after standing for 18-30 hours, put the reacted The waste cotton fibers are taken out and cleaned and dried to obtain modified cotton-containing fibers;

[0037] S2, performing carbonization treatment on the modified cotton-containing fibers under an inert gas atmosphere; then, cooling down to room temperature to obtain carbonized cotton fibers;

[0038] S3, placing the carbonized cotton fiber in a hydrochloric acid solution with a predetermined concentration, soaking it at 55-65° C. for 18-30 hours; then washing it until neutral, and drying it to prepare a carbon fiber material;

[0039] S4, ...

Embodiment 1

[0051] Embodiment 1 of the present invention provides a method for preparing an environmentally friendly nanofiber material that rapidly absorbs heavy metal ions, comprising the following steps:

[0052] S1, cut waste cotton-containing fibers into 5cm×5cm square materials, and place them in a mixed solution of dimethylimidazole and anhydrous methanol (the ratio of dimethylimidazole and anhydrous methanol is 40mmol: 100mL), cotton-containing After the fibers are fully immersed, soak for 12 hours, then add a mixed solution of zinc nitrate hexahydrate and anhydrous methanol (the ratio of zinc nitrate hexahydrate and anhydrous methanol is 10mmol: 100mL) and fully stir and mix to obtain a reaction system, and let it stand for 24 hours Finally, the waste cotton fibers after the reaction are taken out and cleaned with anhydrous methanol, and dried at 50° C. to obtain modified cotton-containing fibers;

[0053] S2, carbonize the modified cotton-containing fiber under a nitrogen atmosp...

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Abstract

The invention provides an environment-friendly nanofibrous material that rapidly absorbs heavy metal ions and a preparation method thereof. The preparation method uses waste cotton-containing fibers from a wide range of sources as the base material. Firstly, through the in-situ growth of metal-organic framework structure-carbonization pore-forming modification treatment combined with acid etching treatment on the cotton-containing fibers, a surface with mesopore-micropores is prepared. The carbon fiber material with porous multilayer structure and polyhedral structure, and then, through two-step joint modification of carbon fiber material oxidation and reduction to prepare environmentally friendly nanofiber material, which has excellent heavy metal ion adsorption performance and hydrothermal regeneration performance, and Effectively prevent the secondary pollution of the adsorption material. On the basis of retaining the unique biomass fiber structure of cotton fiber, the environmentally friendly nanofiber material provided by the present invention builds a rich porous structure and polyhedral structure on its fiber surface, and has active sites composed of a variety of oxygen-containing functional groups. Has excellent adsorption properties.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to an environment-friendly nanofiber material capable of rapidly absorbing heavy metal ions and a preparation method thereof. Background technique [0002] With the rapid development of economy and industry in modern society, the problem of water pollution has become increasingly serious, which has threatened people's daily life. Among the many wastewater pollutants, heavy metal ions are particularly harmful to the human body. Heavy metals in the environment are toxic to humans and animals, and may bioaccumulate along the food chain, posing a threat to human health. [0003] Among many heavy metal ion sewage treatment technologies, biomass carbon fiber material adsorption technology has attracted widespread attention due to its high-efficiency removal capacity, no secondary pollution and recyclable characteristics. Biomass carbon fiber adsorption materials can be prepared...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/20B01J20/30C02F1/28C02F101/20
CPCB01J20/20B01J2220/4825C02F1/283C02F2101/20
Inventor 顾晓凡唐磊王西晓
Owner YIYANG SHENGLI CHEM IND