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
CN102107907AInactive Publication Date: 2011-06-29INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
Publication Date
2011-06-29
Estimated Expiration
Not applicable · inactive patent

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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 titanium dioxide, 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 titanium dioxide 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.
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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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