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Porous nano hydrated titanium dioxide dearsenifying material and preparation method thereof

A hydrated titanium dioxide, nanotechnology, applied in the direction of titanium dioxide, nanostructure manufacturing, titanium oxide/hydroxide, etc., can solve the problems of low arsenic removal performance and poor separability performance of nano titanium dioxide, and achieve high arsenic removal performance. Effect

Inactive Publication Date: 2012-11-28
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a simple and low-cost method for preparing nano hydrated titanium dioxide arsenic removal material to solve the existing problems of low arsenic removal performance and poor separability of nano titanium dioxide

Method used

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  • Porous nano hydrated titanium dioxide dearsenifying material and preparation method thereof
  • Porous nano hydrated titanium dioxide dearsenifying material and preparation method thereof
  • Porous nano hydrated titanium dioxide dearsenifying material and preparation method thereof

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Embodiment 1

[0020] Such as figure 1 As shown, the preparation process of the porous nano hydrated titanium dioxide arsenic removal material of the present invention is as follows:

[0021] The titanium tetrachloride solution with a concentration of 0.1 mol / L was continuously stirred at 90°C, and then the ammonia solution with a mass fraction of 25% was evenly added dropwise to the titanium tetrachloride aqueous solution to obtain a white suspension. When the pH of the suspension reaches 8.5, stop adding ammonia water dropwise. Filter the white precipitate, wash it to neutral, and then dry it at 100°C until the mass fraction of water is about 12.5%, to obtain a large particle hydrated titanium dioxide with a certain strength, and grind it mechanically for 10 minutes to obtain a porous nano-hydrated titanium dioxide arsenic removal material It is composed of anatase-type and amorphous nano-hydrated titanium dioxide, wherein the mass fraction of anatase is 62.9%, and the mass fraction of wa...

Embodiment 2

[0030] Such as figure 1 As shown, the preparation process of the porous nano hydrated titanium dioxide arsenic removal material of the present invention is as follows:

[0031] The titanium tetrachloride solution with a concentration of 0.1 mol / L was continuously stirred at 20° C., and then the ammonia solution with a mass fraction of 25% was evenly added dropwise into the titanium tetrachloride aqueous solution to obtain a white suspension. When the pH of the suspension reaches 8.5, stop adding ammonia water dropwise. Filter the white precipitate, wash it to neutral, and then dry it at 100°C until the mass fraction of water is about 19.8%, to obtain a large particle hydrated titanium dioxide with a certain strength, and grind it mechanically for 10 minutes to obtain a porous nano-hydrated titanium dioxide arsenic removal material It is composed of anatase and amorphous nano-hydrated titanium dioxide, wherein the mass fraction of anatase is 12.2%, and the mass fraction of wat...

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Abstract

The invention belongs to the technical field of environmental materials, and particularly relates to a porous nano hydrated titanium dioxide dearsenifying material and a preparation method thereof. The invention provides a good option for removing arsenium in a water body. The material provided by the invention is composed of anatase and amorphous nano hydrated titanium dioxide, wherein the mass percent of water is about 12.5-19.8%. A titanium tetrachloride water solution can be hydrolyzed at different temperatures to obtain nano hydrated titanium dioxide particles with different phase compositions and crystallization degrees; and since the nanoparticles are very fine and have high surface energy, the nanoparticles can easily aggregate to form large particles composed of hydrated titaniumdioxide, and the large particles can be mechanically ground in a proper way to obtain the porous hydrated titanium dioxide nano material with required particle size. The porous nano hydrated titaniumdioxide has excellent adsorbability for trivalent arsenium, can be used for dearsenifying treatment in ground surface arsenium-polluted water sources and underground arsenium-polluted water, and can also be used as an arsenium adsorbent for dearsenifying water purifiers.

Description

technical field [0001] The invention belongs to the technical field of environmental materials, and specifically relates to a porous nanometer hydrated titanium dioxide arsenic removal material and a preparation method thereof, which provide a good choice for removing arsenic in water bodies. Background technique [0002] Arsenic pollution in water is a global environmental problem. Tens of millions of people around the world are harmed by arsenic-polluted water to varying degrees. (USEPA) set the arsenic content standard in drinking water as 10μg / L in 2001, and my country's new "Drinking Water Standard" also reduced the arsenic content standard from 50g / L to 10g / L. Arsenic removal from waste water and drinking water brings new challenges. [0003] Due to the reduction of arsenic content standards in drinking water, the problem of excessive arsenic content in surface water bodies and groundwater worldwide has become more serious. For arsenic-containing water with medium and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G23/047B82B3/00
Inventor 徐正超李琦高世安尚建库
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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