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A preparation method of magnetic biological iron manganese oxide capable of degrading single benzene ring pollutants

A technology of biomanganese oxide and single benzene ring, applied in biochemical equipment and methods, methods based on microorganisms, water pollutants, etc., can solve problems such as human health and safety hazards, high acute toxicity, and difficult biodegradation

Active Publication Date: 2020-05-05
TIANJIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These single benzene ring pollutants are frequently detected in the environment and are difficult to be biodegraded, and their residual concentrations in the environment have very high acute toxicity to organisms in water
Certain monophenyl ring pollutants can produce drug-resistant pathogens in the environment, which will not only endanger human health and safety, but also adversely affect the growth of land vertebrates and fish

Method used

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  • A preparation method of magnetic biological iron manganese oxide capable of degrading single benzene ring pollutants
  • A preparation method of magnetic biological iron manganese oxide capable of degrading single benzene ring pollutants
  • A preparation method of magnetic biological iron manganese oxide capable of degrading single benzene ring pollutants

Examples

Experimental program
Comparison scheme
Effect test

Embodiment example 1

[0020] A method for preparing a magnetic biological iron-manganese oxide material capable of degrading single benzene ring pollutants, comprising the following steps:

[0021] (1) Preparation of biological manganese oxide: Inoculate the dry powder of the strain Psuedonomas putida (strain preservation number) with an inoculation amount of 1% (m / v) into PYCM sterilized at 121°C for 20 minutes by a high-pressure steam sterilizer In the culture medium, place it in a constant temperature air bath shaker and culture it at 25°C at a speed of 125r / min for 24h until a black granular precipitate is formed; the activated culture is inserted into a sterile exposure tank with an inoculum of 1%. In the fermenter with gas and stirring function, the volume of PYCM medium in the tank is 2 / 3 of the volume of the fermenter, and it is sterilized at 121°C for 20 minutes before filling;

[0022] (2) Preparation of magnetic bio-manganese oxide: when the activated culture is connected to the fermente...

Embodiment example 2

[0024] Degradation effect of magnetic bio-iron-manganese oxide materials on acetaminophen

[0025] (1) The preparation method of the magnetic bio-manganese oxide material is the same as the steps (1) and (2) in the implementation case 1;

[0026] (2) Add 5-15g / L magnetic bio-manganese oxide to 100ml, 10mg / L acetaminophen solution, place it in a constant temperature air bath shaker, and incubate at 25°C with a speed of 125r / min for 24h , take 1ml of the supernatant in a centrifuge tube, centrifuge at 12000r / min for 10min, then filter with a 0.22um filter membrane to obtain a sample, and use UV-HPLC to measure the content of acetaminophen at different times. figure 2 It is the degradation effect diagram of 10mg / L acetaminophen by magnetic biological iron manganese oxide material. The test results show that the degradation efficiency of the magnetic bio-iron-manganese oxide material can reach 75% within 2 hours, and the content of acetaminophen in the aqueous solution is 0 at 2...

Embodiment example 3

[0028] Degradation effect of 1-naphthol by magnetic bio-iron manganese oxide materials

[0029] (1) The preparation method of the magnetic bio-manganese oxide material is the same as the steps (1) and (2) in the implementation case 1;

[0030] (2) Add 5-15g / l magnetic bio-manganese oxide to 100ml, 10mg / L 1-naphthol solution, place it in a constant temperature air bath shaker, and cultivate it at 25°C with a speed of 125r / min for 24h , take 1ml of the supernatant in a centrifuge tube, centrifuge at 12000r / min for 10min, then filter with a 0.22um filter membrane to obtain a sample, and use UV-HPLC to measure the content of 1-naphthol at different times. image 3 It is the effect diagram of the degradation of 10mg / L 1-naphthol by the magnetic biological iron manganese oxide material. The test results show that the magnetic biological iron manganese oxide material can rapidly degrade 1-naphthol, the content of 1-naphthol in the aqueous solution is 2.608 mg / L in 240 minutes, and t...

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Abstract

The invention provides a method for preparing magnetic biological iron-manganese oxide that can degrade single benzene ring pollutants. By providing a specific culture environment for Pseudomonoas putida, the manganese oxidase of Pseudomonoas putida is induced to oxidize Mn2+ to prepare manganese oxide materials. During the formation process of manganese oxide, it interacts with nanomagnetic nuclei to form a cohesive mosaic structure and generates biological iron and manganese with superparamagnetic properties. Oxide. The present invention has a remarkable effect on degrading monobenzene-type organic wastewater. It can efficiently biodegrade single benzene ring pollutants without the addition of external chemicals. Its good magnetic stability is conducive to recovery and recycling. The activation effect is still good after repeated degradation of pollutants. It is a green and environmentally friendly Environmentally friendly materials have broad application prospects in degrading organic pollutants in water bodies.

Description

technical field [0001] The invention belongs to the field of biomass processing, and in particular relates to a preparation method and application of a magnetic biological iron-manganese oxide capable of degrading single benzene ring pollutants. Background technique [0002] In recent years, some emerging pollutants have appeared in the water environment, and single benzene ring pollutants are one of them. This kind of compound and its metabolites are continuously discharged into various environmental media such as surface water, groundwater and soil. Persistence may pose potential hazards to aquatic ecosystems and humans through complex interactions among species. These single benzene ring pollutants are frequently detected in the environment and are difficult to be biodegraded, and their residual concentration in the environment has very high acute toxicity to organisms in water. Certain monophenyl ring pollutants can produce drug-resistant pathogens in the environment, w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/889C02F1/00C12P3/00C12R1/40C02F101/34
CPCC12P3/00C02F1/00B01J23/8892C02F2101/345B01J35/33
Inventor 秦松岩胡杰黄鹏赵立新
Owner TIANJIN UNIVERSITY OF TECHNOLOGY