Preparation method of modified mesopore TiO2 capable of effectively removing phosphorus in wastewater

A modified, mesoporous technology, applied in chemical instruments and methods, water/sewage treatment, adsorbed water/sewage treatment, etc., can solve the problems of phosphorus ion removal in water, unused modification, etc., and achieve production costs. Low, wide distribution of raw materials, good economic and social benefits

Pending Publication Date: 2015-06-17
YUNNAN UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

And the mesoporous TiO prepared in this paper 2 It is used as a photocatalyst, and it is not used to trea

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0021] Example 1:

[0022] Add 5g of the dehydrated template water hyacinth to 30g of Ti precursor solution (titanium nitrate:ethanol:acetylacetone=1:19:0.1) and 1% iron and aluminum nitrate, the ratio of iron ion to aluminum ion is 1:2 , The mixed solution was ultrasonically oscillated for ultrasonic soaking for 20 hours. The soaked solution was evaporated at 100°C to obtain the initial product by the one-pot method. After that, the product was calcined at 280°C for 2 hours and then calcined at 460°C for 4 hours to obtain a white powder, which is mesoporous TiO. 2 Phosphorus removal agent.

Example Embodiment

[0023] Example 2:

[0024] Add 1g of the dehydrated template water hyacinth to 10g of Ti precursor solution (titanium sulfate:ethanol:acetylacetone=5:28:0.8) and 5% iron and aluminum sulfate, the ratio of iron ion to aluminum ion is 1:5 , The mixed solution is ultrasonically oscillated for ultrasonic soaking for 10 hours. The soaked solution is evaporated at 100°C to obtain the initial product by one-pot method, and then the product is calcined in a muffle furnace at 400°C for 5 hours to obtain a white powder, which is modified mesoporous TiO 2 Phosphorus removal agent.

Example Embodiment

[0025] Example 3:

[0026] Add 10g of dehydrated template water hyacinth to 30g of Ti precursor solution (titanium chloride:ethanol:acetylacetone=9:25:1) and 10% iron and aluminum chloride, the ratio of iron ion to aluminum ion is 1 :10, ultrasonically oscillate the mixed solution for 15 hours. The soaked solution is evaporated at 100°C to obtain the initial product by one-pot method, and then the product is calcined in a muffle furnace at 1000°C for 3 hours to obtain a white powder, which is modified mesoporous TiO 2 Phosphorus removal agent.

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Abstract

The invention provides a preparation method of a modified mesopore TiO2 capable of effectively removing phosphorus in wastewater. The preparation method comprises the following steps: mixing water hyacinth with a Ti precursor solution (a mixture of titanium source, ethyl alcohol and acetylacetone) for soaking; adding iron and aluminum salt to modify; obtaining an initial product through a one-pot method; and calcining at high temperature to obtain the modified mesopore TiO2. The maximum adsorption capacity of the obtained modified mesopore TiO2 is 135 mg/g; when the modified mesopore TiO2 is added into phosphorus wastewater to stir for 1-6 h, the phosphorus removal rate can be up to 90-98%; when the addition is less than 2 g/L, the phosphorus wastewater within 100 mg/L can be effectively removed; and the phosphorus adsorbed modified mesopore TiO2 can be repeatedly utilized through secondary high-temperature calcination without causing secondary pollution to the environment.

Description

technical field [0001] The invention relates to a one-pot method for preparing modified mesoporous TiO with water hyacinth stem as a template and doped with iron and aluminum ions 2 method of phosphorus removal. It can be used to efficiently remove phosphorus ions in phosphorus-containing wastewater with different concentrations by changing the amount of addition. Background technique [0002] Water is an indispensable and important substance in human life and production activities, and it is also an irreplaceable important natural resource. With the rapid development of the economy and the continuous improvement of the degree of industrialization, domestic sewage rich in high phosphorus and agricultural chemicals containing pesticide and fertilizer residues The volume of wastewater is getting higher and higher, resulting in the discharge of wastewater containing a large amount of nutrients into closed waters, causing serious harm to water bodies. At present, the eutrophic...

Claims

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Application Information

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IPC IPC(8): B01J20/06B01J20/30C02F1/28C02F1/58
Inventor 王家强段德良李俊杰闫智英孙月娟
Owner YUNNAN UNIV
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