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Zirconium-based arsenic removing material and preparation method and application thereof

A zirconium-based, nano-zirconium dioxide technology, applied in chemical instruments and methods, zirconia, and other chemical processes, can solve problems such as excessive arsenic in water, and achieve low cost, low hydrothermal reaction temperature, and simple operation.

Active Publication Date: 2013-08-21
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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Problems solved by technology

[0006] The purpose of the present invention is to provide a high specific surface area, low isoelectric point nano zirconia and its preparation method and its application in the removal of arsenic, this nano zirconia can remove arsenic well in water, to solve the current The problem of excess arsenic

Method used

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  • Zirconium-based arsenic removing material and preparation method and application thereof
  • Zirconium-based arsenic removing material and preparation method and application thereof
  • Zirconium-based arsenic removing material and preparation method and application thereof

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Embodiment

[0029] like figure 1 As shown, under the action of magnetic stirring, ZrOCl was 2 ·8H 2 O (11.2791g), water (20mL), and ammonia water (50mL) were thoroughly mixed, and then introduced into a polytetrafluoroethylene reactor for hydrothermal reaction. The temperature of the hydrothermal reaction was 150°C, and the hydrothermal time was 3h. Then, the precipitate was washed until silver nitrate was free of chloride ions, dried at 110° C. for 8 hours, and finally ground into powder to obtain amorphous zirconia with a particle size of 7.12-13.75 microns. The amorphous nano-zirconia powder is heat-treated: the temperature is 450-500° C., the temperature is kept for 1 hour, and then the furnace is cooled to room temperature to obtain crystallized nano-zirconia with a grain size of 7-10 nm.

[0030] like figure 1 As shown, (a) is amorphous zirconia, and (b) is crystalline zirconia. Depend on figure 1 It can be seen that the prepared nano-zirconia has a relatively serious agglomera...

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Abstract

The invention belongs to the technical fields of inorganic nonmetallic nanomaterial preparation and water purification environmental protection, in particular to high-specific surface area low-isoelectric point nano zirconium dioxide and a preparation method and application thereof in removing arsenic. The nano zirconium dioxide has the crystallized specific surface area of 161.8m<2> / g, the amorphous specific surface area of 327.1m<2> / g and the isoelectric point of about 3 to 4. The nano zirconium dioxide has higher arsenic-removing capacity, the saturated adsorption capacity of a crystallized sample exceeds 47mg / g, and the saturated adsorption capacity of an amorphous sample exceeds 83mg / g. ZrOCl2.8H2O, water and ammonia water serve as precursors of a hydrothermal reaction, and the method comprises the following steps of: performing hydrothermal reaction to obtain a zirconium oxide precipitate; washing, drying and grinding to obtain amorphous zirconium dioxide powder; and calcining to obtain the crystallized zirconium dioxide material. The process of preparing the nano zirconium dioxide is simple, the high-specific surface area low-isoelectric point nano zirconium dioxide can be obtained, and a novel arsenic removing material is provided for purification of arsenic-containing sewage and environmental protection.

Description

technical field [0001] The invention belongs to the technical field of preparation of inorganic non-metallic nanomaterials and water purification and environmental protection, in particular to the preparation of nano-zirconia with high specific surface area and low isoelectric point, a preparation method and application in arsenic removal. Background technique [0002] Arsenic is widely distributed in the atmosphere, water, soil, rocks and living organisms. In natural water bodies, dissolved arsenic is generally represented by inorganic arsenate (AsO 4 3- ), arsenite (AsO 3 3- ) or in the form of methylated arsenic compounds. Arsenic contamination is currently found in surface waters in many countries and regions. In Inner Mongolia, Xinjiang, Taiwan and other places in my country, the arsenic content in drinking water is as high as 0.2-2.0mg / L in some areas. [0003] my country's drinking water standard GB5749-2006 stipulates that the arsenic concentration in drinking ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/06B01J20/30C01G25/02C02F1/28C02F1/58
Inventor 崔航李琦高世安尚建库
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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