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Method for preparing TiO2 by biological template for fixing arsenic in plants

A biological template and plant technology, applied in the direction of titanium oxide/hydroxide, titanium dioxide, etc., can solve the problems of low resource utilization and energy utilization, low separation rate of heavy metal elements, secondary pollution of the environment, etc., and achieve arsenic fixation Improved performance, good effect, and the effect of preventing secondary pollution

Inactive Publication Date: 2020-04-03
YUNNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These treatment methods have the disadvantages of secondary pollution to the environment, low separation rate of heavy metal elements, long process flow, large investment in equipment, and low utilization rate of resource and energy utilization.

Method used

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  • Method for preparing TiO2 by biological template for fixing arsenic in plants
  • Method for preparing TiO2 by biological template for fixing arsenic in plants
  • Method for preparing TiO2 by biological template for fixing arsenic in plants

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Preparation of TiO as a biological template for immobilizing arsenic in plants 2 Method, preparation process:

[0039] (1) prepare glutaraldehyde solution, soak fresh centipede grass in the glutaraldehyde solution;

[0040] (2) Dehydration of centipede grass is placed in ethanol with different concentration gradients, after dehydration, it is naturally dried in a ventilated place, and the ethanol after gradient dehydration is recovered;

[0041] (3) Add tetrabutyl titanate, acetylacetone, and ethanol into the beaker to prepare TiO 2 The precursor liquid, the centipede grass that dries is immersed in the precursor liquid and stands still;

[0042] (4) naturally hydrolyze the centipede grass after the precursor solution is immersed in a ventilated place for a week;

[0043] (5) Put the hydrolyzed centipede grass into the muffle furnace, grind it after calcining, and the obtained product is the centipede grass biological template TiO 2 ; Centipede grass biological temp...

Embodiment 2

[0045] On the basis of embodiment 1, preparation process:

[0046] (1) preparation concentration is 3% glutaraldehyde solution, and fresh centipede grass is soaked in the glutaraldehyde solution;

[0047] (2) Dehydration of centipede grass is placed in ethanol with different concentration gradients, after dehydration, it is naturally dried in a ventilated place, and the ethanol after gradient dehydration is recovered;

[0048] (3) Add tetrabutyl titanate, acetylacetone, and ethanol into the beaker to prepare TiO2 The precursor liquid, the centipede grass that dries is immersed in the precursor liquid and stands still;

[0049] (4) naturally hydrolyze the centipede grass after the precursor solution is immersed in a ventilated place for a week;

[0050] (5) Put the hydrolyzed centipede grass into the muffle furnace, grind it after calcining, the calcining temperature is 440°C, and the calcining time is 5h, the product obtained is the centipede grass biological template TiO 2 ...

Embodiment 3

[0052] On the basis of embodiment 1-2, preparation process:

[0053] (1) preparation concentration is 5% glutaraldehyde solution, and fresh centipede grass is soaked in the glutaraldehyde solution;

[0054] (2) Dehydration of centipede grass is placed in ethanol with different concentration gradients, after dehydration, it is naturally dried in a ventilated place, and the ethanol after gradient dehydration is recovered;

[0055] (3) Add tetrabutyl titanate, acetylacetone, and ethanol into the beaker to prepare TiO 2 The precursor liquid, the centipede grass that dries is immersed in the precursor liquid and stands still;

[0056] (4) naturally hydrolyze the centipede grass after the precursor solution is immersed in a ventilated place for a week;

[0057] (5) Put the hydrolyzed centipede grass into the muffle furnace, grind it after calcining, the calcining temperature is 480°C, and the calcining time is 1h, the product obtained is the centipede grass biological template TiO...

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Abstract

The invention discloses a method for preparing TiO2 by a biological template for fixing arsenic in plants, wherein the method comprises the preparation process: (1) preparing a glutaraldehyde solution, and soaking fresh ciliate desert-grass in the glutaraldehyde solution; (2) placing the ciliate desert-grass in ethanol with different concentration gradients, dehydrating, naturally airing in a ventilated place after dehydration, and recovering ethanol after gradient dehydration; (3) adding tetrabutyl titanate, acetylacetone and ethanol into a beaker to prepare a TiO2 precursor solution, and immersing the aired ciliate desert-grass into the precursor solution for standing; (4) naturally hydrolyzing the ciliate desert-grass soaked in the precursor solution at a ventilated place for one week;and (5) putting the hydrolyzed ciliate desert-grass into a muffle furnace, calcining and grinding to obtain a product, namely the ciliate desert-grass biological template TiO2. By controlling the preparation process, the prepared TiO2 has excellent arsenic fixation rate.

Description

technical field [0001] The invention relates to the technical field of arsenic removal in soil, in particular to a biological template for fixing arsenic in plants to prepare TiO 2 method. Background technique [0002] Arsenic is a very common element in the earth's crust and a metalloid that is harmful to organisms. Its pollution to the environment is a natural process, such as rock weathering and volcanic eruptions. At the same time, human activities will also aggravate arsenic pollution in groundwater and soil. For example, many sites around the world have reported severe soil contamination by arsenic due to the widespread use of arsenic-containing pesticides, herbicides, etc. Arsenic diffused in soil and groundwater can enter the food chain through drinking water and contaminated vegetables and agricultural products, so arsenic contamination in soil and water is a global problem. Millions of people worldwide are directly or indirectly exposed to arsenic, which has var...

Claims

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Application Information

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IPC IPC(8): C01G23/047
CPCC01G23/047
Inventor 王家强姜亮和佼张琳龙翔
Owner YUNNAN UNIV
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