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Photocatalytic degradation method of ciprofloxacin by using wastewater containing cadmium

A technology of ciprofloxacin and photocatalysis, which is applied in the field of environmental engineering to achieve good effect, good stability and broad application prospects

Inactive Publication Date: 2017-11-17
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, how to directly use the sludge generated from the treatment of cadmium-containing wastewater as a photocatalyst to absorb and photocatalyze the degradation of ciprofloxacin has not been reported yet.

Method used

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  • Photocatalytic degradation method of ciprofloxacin by using wastewater containing cadmium
  • Photocatalytic degradation method of ciprofloxacin by using wastewater containing cadmium

Examples

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Effect test

Embodiment 1

[0030] This example provides a method for photocatalytic degradation of ciprofloxacin using cadmium-containing wastewater. The specific process is as follows: a 500mL four-neck flask is fixedly installed on a constant temperature magnetic stirring device, and its temperature and stirring rate are controlled to be 25°C and 25°C respectively. 600rpm, 300mL concentration of 0.1g / L TiO 2 The (anatase structure) suspension was added into the four-neck flask, and the cadmium nitrate solution with a concentration of 0.0005mol / L and the sodium sulfide solution with a concentration of 0.0020mol / L were separated at a speed of 2mL / min and added simultaneously Add 0.03mol / L dilute nitric acid to the four-neck flask to control its pH value to 6, and the feeding time is 25 minutes. After the reaction is completed, use a vacuum pump to filter and separate the solid and liquid, vacuum dry at 60°C and grind to obtain a precipitate; Take by weighing 50mg gained precipitation, be dispersed in th...

Embodiment 2

[0032] This example provides a method for photocatalytic degradation of ciprofloxacin using cadmium-containing wastewater. The specific process is as follows: a 500mL four-neck flask is fixedly installed on a constant temperature magnetic stirring device, and its temperature and stirring rate are controlled to be 25°C and 25°C respectively. 600rpm, 300mL concentration of 0.5g / L TiO 2The (anatase structure) suspension was added into the four-neck flask, and the cadmium nitrate solution with a concentration of 0.001mol / L and the sodium sulfide solution with a concentration of 0.0025mol / L were separated at a speed of 1mL / min and added simultaneously Add 0.03mol / L dilute nitric acid to the four-necked flask to control its pH value to 4.5, and the feeding time is 50 minutes. After the reaction is completed, use a vacuum pump to filter and separate the solid and liquid, vacuum dry at 60°C and grind to obtain a precipitate; Take by weighing 50mg gained precipitation, be dispersed in ...

Embodiment 3

[0034] This example provides a method for photocatalytic degradation of ciprofloxacin using cadmium-containing wastewater. The specific process is as follows: a 500mL four-neck flask is fixedly installed on a constant temperature magnetic stirring device, and its temperature and stirring rate are controlled to be 25°C and 25°C respectively. 600rpm, 300mL concentration of 0.15g / L TiO 2 The (anatase structure) suspension was added into the four-neck flask, and the cadmium nitrate solution with a concentration of 0.001mol / L and the sodium sulfide solution with a concentration of 0.0025mol / L were separated at a speed of 1mL / min and added simultaneously Add 0.03mol / L dilute nitric acid to the four-neck flask to control its pH value to 5, and the feeding time is 50 minutes. After the reaction is completed, use a vacuum pump to filter and separate the solid and liquid, vacuum dry at 60°C and grind to obtain a precipitate; Take by weighing 50mg gained precipitation, be dispersed in th...

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Abstract

The invention relates to a photocatalytic degradation method of ciprofloxacin by using wastewater containing cadmium. The method comprises the following steps: separating wastewater containing cadmium and a sodium sulfide solution according to a certain proportion and adding the wastewater containing cadmium and sodium sulfide solution into a base solution containing titanium dioxide seed crystals, adjusting the pH value to a range from 3.0 to 7.5, performing a reaction, performing separation to obtain a precipitate, adding the obtained precipitate into a ciprofloxacin solution, performing stirring and performing a degradation reaction under illumination. The method provided by the invention can realize treatment on the water containing cadmium, can also be used for photocatalytic degradation of ciprofloxacin, has a good catalytic effect and a fast degradation speed, and has great theoretical and practical significance. When the wastewater containing cadmium has a concentration of 0.0010 mol / L, the sodium sulfide solution has a concentration of 0.0025 mol / L, the adding rates are both 1.0 ml / min, the seed crystal adding quantity is 0.15 g / L, and the pH value is 5.0, 50 mg of the obtained precipitate is taken and dispersed in 100 mL of a ciprofloxacin solution with a concentration of 10 mu mol / L , and after the illumination reaction is carried out for 20 min, the degradation rate is 98.8%.

Description

technical field [0001] The invention belongs to the technical field of environmental engineering and relates to the recycling of cadmium-containing wastewater, in particular to a method for photocatalytically degrading ciprofloxacin by using cadmium-containing wastewater. Background technique [0002] Ciprofloxacin (CIP) belongs to quinolone antibacterial drugs, has good antibacterial activity against Gram-positive and negative bacteria, and is widely used in the treatment of human and animal diseases. With the continuous improvement of analysis and detection methods, it has been found that ciprofloxacin widely exists in groundwater, surface water, soil and other environmental media. As a broad-spectrum antibiotic, the presence of ciprofloxacin in the environment will cause certain toxicity to non-target microorganisms. [0003] Studies have shown that ciprofloxacin is difficult to be degraded by microorganisms and cannot be effectively removed by conventional water treatme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/30C02F101/36C02F101/38C02F101/34
CPCC02F1/30C02F2101/34C02F2101/36C02F2101/38C02F2305/10
Inventor 李青竹彭兵高梦思闵小波杨志辉刘恢王海鹰杨卫春
Owner CENT SOUTH UNIV