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A device for realizing the method of removing ronidazole in water

A technology for ronidazole and water removal, which is applied in the fields of environmental protection and water treatment, can solve the problems of complex chemical structure, cannot be effectively removed and degraded, and achieves the effects of simple operation, improved feasibility and operability, and outstanding safety.

Active Publication Date: 2016-08-24
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a representative nitroimidazole substance, ronidazole has a complex chemical structure, and traditional treatment processes cannot effectively remove and degrade it

Method used

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  • A device for realizing the method of removing ronidazole in water
  • A device for realizing the method of removing ronidazole in water
  • A device for realizing the method of removing ronidazole in water

Examples

Experimental program
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Effect test

Embodiment 1

[0043] The initial concentration of ronidazole was prepared with ultrapure water at 5μM (1mg / L), and the degradation experiments of ronidazole under three processes were carried out respectively. The experimental operation of the degradation of ronidazole under the single chlorine process is: use acid and alkali solution to adjust the initial pH of ronidazole solution to 7, add chlorine to the ronidazole solution, so that the dosage of chlorine is [HOCl] 0 =50μM (as Cl 2 meter), the control reaction temperature is 25 ° C; the degradation experiment operation of ronidazole under the independent ultraviolet process is: use acid and alkali solution to adjust the initial pH of ronidazole solution to 7, carry out ultraviolet irradiation to ronidazole solution, and control the intensity of ultraviolet irradiation to be 10.6μW / cm 2 , the reaction temperature is controlled at 25°C; the experimental operation of the degradation of ronidazole under the combined UV / chlorine process is a...

Embodiment 2

[0046] Use ultrapure water to configure the initial concentration of ronidazole to be 5 μM (1mg / L), use acid and alkali to adjust the initial pH of ronidazole solution to 7, add chlorine to the ronidazole solution, and control the amount of chlorine added to [HOCl] 0 =0, 125, 25, 50, 100, 150μM (with Cl 2 meter), and at the same time carry out ultraviolet irradiation, and control the ultraviolet intensity to 5.4μW / cm 2 , the reaction temperature is controlled to be 25°C during the reaction process, and the removal rates of ronidazole are respectively 37.7%, 67.6%, 95.8%, 97.3%, and 98.6% after 15 minutes of reaction, see Figure 4 .

[0047] The increase of chlorine dosage increases the concentration of substrate reactants, increases the driving force of the reaction, and effectively improves the reaction rate and the removal rate of RNZ.

Embodiment 3

[0049] Use ultrapure water to prepare RNZ with an initial concentration of 5 μM (1 mg / L), use acid and alkali solution to adjust the initial pH of ronidazole solution to 7, add chlorine to ronidazole solution, and the amount of chlorine added is [HOCl] 0 =50μM (as Cl 2 At the same time, UV irradiation was carried out, and the UV intensity was controlled to be 0, 3.0, 5.4, 8.3, 10.6 μW / cm 2 , under the test conditions that the reaction temperature is controlled at 25°C, the removal rates of ronidazole are 0% (15min), 78.9% (15min), 95.8% (15min), 98.9% (15min), and 98.4% (8min). See Figure 5 .

[0050] The increase of ultraviolet intensity increases the generation rate of hydroxyl radicals, increases the driving force of the reaction, and effectively improves the reaction rate and the removal rate of RNZ.

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Abstract

A method for removing ronidazole in water comprises the following steps: pretreating the water sample to improve the ultraviolet irradiation effect on the water sample; performing photocatalytic oxidation on the pretreated water sample to effectively degrade RNZ in the water. The method is a photocatalytic oxidation technology, that is, a combined ultraviolet / chlorine process, in which a certain amount of chlorine is added to the water body, and a certain ultraviolet intensity is controlled for ultraviolet irradiation. The device for realizing the method includes: a reactor, a quartz tube, an ultraviolet lamp, an agitator, a power connection line, a water pump and a constant temperature water bath box, the quartz tube is arranged in the center of the reactor, the agitator is arranged in the quartz tube, and the ultraviolet lamp Set in the reactor, the ultraviolet lamp is connected to the power supply through the power connection line. Controlling the reaction time to 15 minutes can achieve the purpose of efficiently removing ronidazole in water, and the removal rate can reach more than 95%, which provides technical support for improving the water purification process of water plants. The invention is suitable for the treatment of antibiotic waste water and source water.

Description

technical field [0001] The invention belongs to the technical field of environmental protection and water treatment, and relates to the removal technology of toxic and harmful organic substances in water, in particular to a method and device for removing antibiotic waste water and ronidazole (RNZ) in water source water. Background technique [0002] At present, bacterial infection is still a major disease that endangers human health, and systemic and local application of antibiotics is the main way to kill pathogenic bacteria in the body. Nitroimidazoles have been widely used clinically because of their strong bactericidal ability, broad antibacterial spectrum, low drug resistance, low price and good curative effect. [0003] As a new pollutant, nitroimidazoles are carcinogenic, teratogenic, mutagenic and genotoxic, so they are becoming a new concern in the field of drinking water safety. Foreign countries have begun to pay attention to the residue and removal of nitroimida...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/08
Inventor 陈英英徐斌马慧荣林琳朱贺振
Owner TONGJI UNIV