Method for removing residual tetracycline in pharmaceutical wastewater by using MnO2 supported graphene after flocculation

A pharmaceutical wastewater and graphene technology, applied in chemical instruments and methods, water pollutants, water/sewage treatment, etc., can solve the problems of large-scale application of cost constraints, large specific surface area, poor biodegradability, etc., and achieve excellent affinity Water-based, large specific surface area, and many adsorption sites

Inactive Publication Date: 2018-12-14
NINGXIA UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Tetracycline industrial wastewater mainly refers to the reaction mother liquor and process wastewater discharged in the tetracycline production process. Because it contains a large amount of tetracycline and intermediate metabolites with antibacterial effect, this type of wastewater has poor biodegradability and has certain biological toxicity.
The above-mentioned treatment technologies have been applied to a certain extent in different fields, but still have their own limitations: tetracycline can be degraded by catalysis and photocatalysis, so that it can be completely converted into small molecular substances, but the high cost of catalysts and accelerators is limited. The large-scale application of this method
[0004] However, there is no static adsorption material with the characteristics of large specific surface area, excellent hydrophilicity, many adsorption sites, easy preparation, and selective adsorption, and there is no method for using this material to remove residual tetracycline in pharmaceutical wastewater.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1: a kind of utilization MnO 2 The method for loading graphene to remove residual tetracycline in pharmaceutical wastewater after flocculation is as follows: graphene and sodium hypochlorite solution with a mass concentration of 14% are fully mixed according to the ratio of 1kg:100L, stirred in a water bath at 50°C for 48h, and then reacted The mixture was washed with deionized water until the effluent was colorless, dried at 80°C for 24 hours to obtain pretreated graphene, 1kg of pretreated graphene was added to 100L deionized water and stirred for 2 hours, then 1.4kg of potassium permanganate was added to fully stir 5h, then reacted at 130°C for 24h, washed with deionized water until the effluent was colorless, and dried at 110°C for 12h to obtain MnO 2 Supported graphene. Add polyaluminum chloride 0.175g L respectively in pharmaceutical waste water -1 and polyferric sulfate 0.175g L -1 , speed 50r min -1 , the coagulation time is 50 min, and the settli...

Embodiment 2

[0021] Embodiment 2: a kind of utilization MnO 2 The method for loading graphene to remove residual tetracycline in pharmaceutical wastewater after flocculation is as follows: fully mix graphene and sodium hypochlorite solution with a mass concentration of 14% in a ratio of 1kg:110L, and stir in a water bath at 65°C for 48h. Subsequently, the reactant was washed with deionized water until the effluent was colorless, and dried at 80° C. for 24 hours to obtain pretreated graphene. Add 1kg of pretreated graphene to 100L deionized water and stir for 2 hours, then add 1.0kg of potassium permanganate and stir for 5 hours, then react at 150°C for 24h, wash with deionized water after reaction until the effluent is colorless, and dry at 110°C 12h, get MnO 2 Supported graphene. Add polyaluminum chloride 0.175g L respectively in pharmaceutical waste water -1 and polyferric sulfate 0.175g L -1 , speed 50r min -1 , the coagulation time is 100 min, and the settling time is 70 min to ob...

Embodiment 3

[0022] Embodiment 3: a kind of utilization MnO 2The method for loading graphene to remove residual tetracycline in pharmaceutical wastewater after flocculation is as follows: fully mix graphene and sodium hypochlorite solution with a mass concentration of 14% in a ratio of 1kg:120L, and stir in a water bath at 40°C for 48h. Subsequently, the reactant was washed with deionized water until the effluent was colorless, and dried at 80° C. for 24 hours to obtain pretreated graphene. Add 1kg of pretreated graphene to 100L deionized water and stir for 2 hours, then add 0.8kg of potassium permanganate and stir for 5 hours, then react at 120°C for 24h, wash with deionized water after reaction until the effluent is colorless, and dry at 110°C 12h, get MnO 2 Supported graphene. Add polyaluminum chloride 0.175g L respectively in pharmaceutical waste water -1 and polyferric sulfate 0.175g L -1 , speed 50r min -1 , the coagulation time is 60 min, and the settling time is 60 min to obta...

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Abstract

The invention relates to a method for removing residual tetracycline in pharmaceutical wastewater, and particularly relates to a method for removing residual tetracycline in pharmaceutical wastewaterby using MnO2 supported graphene after flocculation. The method comprises the following steps: firstly, pretreating graphene, then preparing the MnO2 supported graphene by utilizing the pretreated graphene, finally, adding the obtained MnO2 supported graphene into pharmaceutical wastewater obtained after flocculation, and then a static adsorption method is carried out. The method provided by the invention has a good environmental protection effect, the preparation method is unique and simple, and the adsorption material has the characteristics that hydrophilicity is excellent, the number of adsorption sites is large, preparation is easy, a selective adsorption property is achieved, and the like.

Description

technical field [0001] The invention relates to a method for removing residual tetracycline in pharmaceutical wastewater, in particular to a method using MnO 2 Supported graphene method for removing residual tetracycline in pharmaceutical wastewater after flocculation. Background technique [0002] Since the advent of the most representative penicillin in the early 20th century, various antibiotics have been widely used in the treatment of human and animal diseases. In recent years, a variety of antibiotics have been detected in different water bodies, and the environmental protection departments of various countries have listed them as emerging pollutants. Therefore, the pollution of antibiotics to water bodies has also attracted more and more attention. Antibiotics remaining in water not only affect water quality, but also pose long-term potential threats to ecosystems and human health. Tetracycline is an important member of the tetracycline antibiotic family. Because of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/28B01J20/30C02F1/28C02F101/38C02F103/34
CPCB01J20/0222B01J20/20B01J20/28054C02F1/281C02F2101/38C02F2103/343
Inventor 马玉龙宋智李聪儿
Owner NINGXIA UNIVERSITY
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