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Preparation method and application of chitosan-stabilized zirconium-modified nanometer ferrous sulfide composite material

A technology of ferrous sulfide and composite materials, applied in chemical instruments and methods, other chemical processes, contaminated groundwater/leachate treatment, etc., can solve problems such as easy aggregation, easy oxidation, and poor stability of nano-scale ferrous sulfide. Achieve low price, increase adsorption capacity, and improve the effect of easy agglomeration

Active Publication Date: 2021-05-28
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the deficiencies of the prior art in removing molybdate in water and the problems of easy aggregation, oxidation and poor stability of nano-ferrous sulfide, the technical problem to be solved in the present invention is to provide a chitosan-stabilized zirconium modification that removes molybdate in water. The preparation method of permanent nano-ferrous sulfide composite material, in order to improve the reactivity and stability of the composite material, and also provide technical reference for the actual removal of molybdate in water

Method used

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  • Preparation method and application of chitosan-stabilized zirconium-modified nanometer ferrous sulfide composite material
  • Preparation method and application of chitosan-stabilized zirconium-modified nanometer ferrous sulfide composite material

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Embodiment 1

[0037] Present embodiment provides a kind of chitosan stabilized zirconium modified nano ferrous sulfide composite material (the mol ratio of zirconium oxide and ferrous sulfide is 1:2, the mass ratio of chitosan and ferrous sulfide is 1:10, ) preparation method, said method comprising the following steps:

[0038] (1) Preparation of zirconia sol: configure 65mL of ethanol and water as a 5:3 (v / v) mixed solution, and then weigh 3.223g of ZrOCl 2 ·8H 2 O was added to the mixed solution to dissolve, so that the concentration was 0.154mol / L, transferred to a jar, sealed in a water bath, and heated to 70°C for 2 hours. The obtained clear and transparent zirconia sol was sealed and cooled to normal temperature for later use.

[0039] (2) preparation of chitosan solution: first prepare 1% glacial acetic acid with high-purity water, take by weighing 0.176g chitosan and add 1% glacial acetic acid solution to make it fully dissolve, prepare the chitosan solution of 5.275g / L, then tra...

Embodiment 2

[0042] This embodiment provides a chitosan-stabilized zirconium-modified nano-ferrous sulfide composite material (the molar ratio of zirconia to ferrous sulfide is 1:2, and the mass ratio of chitosan to ferrous sulfide is 3:10) The preparation method, described method comprises the following steps:

[0043] (1) The pretreatment of zirconia sol is described in step 1 in example 1.

[0044] (2) Chitosan solution was prepared as described in step 2 in Example 1, except that 0.528g chitosan was weighed.

[0045] (3) Prepare the chitosan-stabilized zirconium-modified nano-ferrous sulfide composite material as described in step 3 in Example 1. (Theoretical CS / ZrO 2 -FeS=0.3).

[0046] The composite material obtained in this example is rough and porous, and the rich zirconia component mainly exists in an amorphous state, and has a strong adsorption capacity for metal ions. (like figure 1 shown).

Embodiment 3

[0048] This embodiment provides a chitosan-stabilized zirconium-modified nano-ferrous sulfide composite material (the molar ratio of zirconia to ferrous sulfide is 1:2, and the mass ratio of chitosan to ferrous sulfide is 5:10) The preparation method, described method comprises the following steps:

[0049] (1) The pretreatment of zirconia sol is described in step 1 in example 1.

[0050] (2) Chitosan solution was prepared as described in step 2 in Example 1, except that 0.88 g of chitosan was weighed.

[0051] (3) Preparation of chitosan zirconium modified nano-ferrous sulfide composite material is the same as described in step 3 in Example 1. (Theoretical CS / ZrO 2 -FeS=0.5).

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Abstract

The invention provides a preparation method and application of a chitosan-stabilized zirconium-modified nanometer ferrous sulfide composite material, belonging to the technical field of environmentally functional composite nanomaterials. The preparation method specifically comprises the following steps: firstly, preparing zirconium oxide with controllable granularity and relatively high purity by adopting a sol method, and dissolving chitosan by using a dilute acid solution; and adding a ferrous chloride solution into the obtained chitosan solution under the protection of nitrogen, carrying out uniform stirring, adding the zirconium oxide sol, continuing stirring, dropwise adding a sodium sulfide solution, conducting reacting, and performing standing to obtain the chitosan-stabilized zirconium-modified nanometer ferrous sulfide composite material. The material is synthesized by adopting a one-step coprecipitation method, raw material cost is low, a preparation process is simple, the defects that ferrous sulfide is easy to agglomerate, low in reaction activity and poor in stability are overcome, meanwhile, the material has a more stable removal effect on molybdate in water, and the material has a good market application prospect in treatment of molybdenum pollution of surface water and underground water.

Description

technical field [0001] The invention belongs to the technical field of environmental functional composite nanomaterials, and in particular relates to a preparation method and application of a chitosan-stabilized zirconium-modified nano-ferrous sulfide composite material for removing molybdate from water and is mainly used in the treatment of molybdenum-containing wastewater. Background technique [0002] The heavy metal molybdenum is an essential trace element for plants and animals, and is also a very important mineral resource. In recent years, with the large-scale application of heavy metal molybdenum, its mining has increased year by year, and the resulting tailings drainage containing high concentration of molybdenum has brought certain harm to the surrounding environment. Such as the Molybdenum Pollution Incident of Huludao Reservoir, the Pollution Incident of Weinan Molybdenum Mine, the Pollution Incident of Luanchuan Molybdenum Mine in Luoyang, Henan Province, etc. ...

Claims

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Application Information

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IPC IPC(8): B01J20/24B01J20/30C02F1/28C02F101/20C02F103/06
CPCB01J20/24B01J20/06B01J20/0285B01J20/0229C02F1/281C02F1/286C02F2101/20C02F2103/06
Inventor 练建军邬洪艳陈波钱付平刘小芳刘再亮
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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