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Removal of antibiotics from sewage using microbial-photocatalytic coupling and its upconversion-titanium dioxide composites

A technology of titanium dioxide and conversion materials, which is applied in the field of the present invention, can solve the problems of increasing sewage treatment costs and poor permeability, and achieve the effects of saving light source costs, improving removal efficiency, and environmentally friendly removal

Active Publication Date: 2022-07-05
INST OF SOIL SCI CHINESE ACAD OF SCI
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  • Claims
  • Application Information

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Problems solved by technology

In the photocatalytic removal method, titanium dioxide has been widely concerned and applied due to its advantages of wide availability and excellent removal effect. However, this method has certain defects, mainly because titanium dioxide can only produce photocatalysis under the excitation of ultraviolet light. , but in practical applications, the ultraviolet light in sunlight has poor permeability, so when titanium dioxide is used to degrade pollutants, an additional ultraviolet light source is required
Not only that, in order to ensure the utilization effect of titanium dioxide on ultraviolet light, the reactor of titanium dioxide will be made as small as possible, or the ultraviolet lamp tube will be covered with the whole reactor. Although these methods improve the degradation effect of pollutants, they will undoubtedly increase the pollution of sewage. processing cost

Method used

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  • Removal of antibiotics from sewage using microbial-photocatalytic coupling and its upconversion-titanium dioxide composites
  • Removal of antibiotics from sewage using microbial-photocatalytic coupling and its upconversion-titanium dioxide composites
  • Removal of antibiotics from sewage using microbial-photocatalytic coupling and its upconversion-titanium dioxide composites

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Embodiment 1

[0028] Example 1, a water treatment method for efficiently removing antibiotics in sewage by utilizing microbial-photocatalytic coupling.

[0029] (1) Preparation of upconversion materials

[0030] Pr 3+ and Li + Elements are derived from Pr(NO 3 ) 3 ·6H 2 O and LiNO 3 ·6H 2 O. 5.3 g of yttrium oxide and nitric acid were made into yttrium nitrate at a ratio of 1:1, while praseodymium and lithium were added as dopants (in the form of nitrate, with a molar ratio of 1%). The yttrium nitrate solution was then dried at a constant temperature of 104 °C to a constant weight, then dissolved in 17.25 mL of alcohol and 5.4 mL of water, and then about 10 mL of tetraethoxysilane was added as a silicon source and gelling agent with constant stirring until formed The uniformly dispersed solution was then heated in a water bath at 70 °C until a colloid was formed, then placed in a furnace at 104 °C for about 17 h, pulverized into powder, heated up to 1000 °C and held at a constant te...

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Abstract

A water treatment method for efficient removal of antibiotics from sewage using microbial-photocatalytic coupling and its upconversion-titanium dioxide composite material:. Preparation of upconversion materials: Pr, Li doped in Y 2 SiO 5 on;. the loading of TiO2 on the upconversion material;. the constructed pericong biological-upconversion-titanium dioxide composite system;. the use of the pericong biological-upconversion-titanium dioxide composite system to remove tetracycline in sewage. The invention can efficiently, thoroughly and environmentally friendly remove antibiotics from sewage, is a low-cost, flexible and easy-to-operate method for removing antibiotics, and is suitable for non-point source sewage or urban sewage containing relatively high antibiotic concentration. The present invention has remarkable effect. After 24 hours, 82% of the tetracycline in the system is degraded, and the surrounding organisms still retain biological activity. Compared with the microbial method, this method is more efficient for the removal of tetracycline, and 24 hours is higher than that of the surrounding organisms by ~40%. .

Description

technical field [0001] The invention belongs to the technical field of biological environment and sewage treatment, and in particular relates to a method for constructing an environment-friendly, efficient and stable microorganism-photocatalytic coupled water treatment technology, which combines a ubiquitous environmental microorganism surrounding organisms with up-conversion-driven light The coupling of catalytic composite materials can efficiently remove antibiotics in sewage through enhanced photocatalytic degradation, microbial degradation and other coupling effects. The invention also relates to upconversion-titania composites in this method. Background technique [0002] With the abuse of antibiotics in humans and animals, especially the widespread use of antibiotics as growth promoters and disease control drugs mixed in feeds, a large number of unused antibiotics enter the environment, causing environmental safety and human health. Great threat. Antibiotics entering...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/32C02F3/34B01J23/10B01J35/00C02F101/34C02F101/38
CPCC02F1/32C02F3/34B01J23/10B01J35/004C02F2101/38C02F2305/10C02F2101/34
Inventor 吴永红汪瑜
Owner INST OF SOIL SCI CHINESE ACAD OF SCI
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