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A kind of affinity adsorption biodegradable film and preparation method thereof

A biodegradable membrane, affinity technology, applied in chemical instruments and methods, biological water/sewage treatment, other chemical processes, etc., can solve the problems of high treatment cost, nano-microsphere residue, toxic secondary pollutants, etc. Achieve the effect of high adsorption specificity, high adsorption and degradation efficiency, and resistance to impurity interference

Inactive Publication Date: 2015-09-23
HUAZHONG UNIV OF SCI & TECH
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

Physicochemical methods have higher processing costs for large-volume low-concentration pollutants, and sometimes produce more toxic secondary pollutants that are difficult to remove by the same method (Torres, R.A., et al., Bisphenol A mineralization by integrated ultrasound -UV-iron (II) treatment. Environmental Science & Technology, 2007.41 (1): p.297-302)
(2) Physical adsorption method: physical adsorption method can adsorb BPA in water onto the adsorbent, but cannot carry out harmless treatment to the adsorbed BPA (Lin, Y., et al., Removal of phenolic estrogen pollutants from different sources of water using molecularly imprinted polymeric microspheres. Environmental Pollution, 2008.153(2): p.483-491)
However, in the previous experiment, the MIPs nanospheres were mixed with activated sludge, and the nanospheres remained in the water, which could not be recycled, which was a potential hazard to the environment.

Method used

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  • A kind of affinity adsorption biodegradable film and preparation method thereof
  • A kind of affinity adsorption biodegradable film and preparation method thereof
  • A kind of affinity adsorption biodegradable film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Example 1: Degradation of BPA in pure water by affinity adsorption biodegradable membrane

[0044] Accurately weigh several 10mg membranes (group A: bacteria+MIM; group B: bacteria+nMIM; group C: dominant bacteria) and add them into 20mL spiked pure water (BPA=500μg / L) to start the degradation reaction. At each reaction termination time point (0, 3, 6, 12, 24h), take parallel samples, centrifuge the reactant at a speed of 6000rpm / min for 3min, and detect BPA in the solid phase (membrane + bacteria) and water phase respectively . Add 3mL methanol into the solid phase and soak for 10min; add 15mL dichloromethane into the water phase three times, shake and extract for 3min each time, collect and combine the organic phases, evaporate to dryness on a nitrogen blower (50°C), and redissolve the residue in 1mL of acetonitrile, and then detected by liquid chromatography-mass spectrometry. It was found that the 24h degradation rate of bacteria+MIM BPA was 47.25%, which was sign...

Embodiment 2

[0045] Example 2: BPA in pure water with heavy metal lead ions degraded by affinity adsorption biodegradable membrane

[0046] Accurately weigh several 10mg films (group A: bacteria+MIM; group B: bacteria+nMIM; group C: dominant bacteria) and add them into 20mL spiked pure water containing lead (BPA=500μg / L, Pb(CH 3 COO) 2 =1mg / L) to start the degradation reaction. At each reaction termination time point (0, 3, 6, 12, 24h), take parallel samples, centrifuge the reactant at a speed of 6000rpm / min for 3min, and detect BPA in the solid phase (membrane + bacteria) and water phase respectively . Add 3mL methanol into the solid phase and soak for 10min; add 15mL dichloromethane into the water phase three times, shake and extract for 3min each time, collect and combine the organic phases, evaporate to dryness on a nitrogen blower (50°C), and redissolve the residue in 1mL of acetonitrile, and then detected by liquid chromatography-mass spectrometry. It is found that the bacterium+...

Embodiment 3

[0047] Example 3: BPA in pure water with heavy metal cadmium ions degraded by affinity adsorption biodegradable membrane

[0048] Accurately weigh several 10mg films (group A: bacteria+MIM; group B: bacteria+nMIM; group C: dominant bacteria) and add 20mL of cadmium-containing pure water (BPA=500μg / L, CdCl 2 =1mg / L) to start the degradation reaction. At each reaction termination time point (0, 3, 6, 12, 24h), take parallel samples, centrifuge the reactant at a speed of 6000rpm / min for 3min, and detect BPA in the solid phase (membrane + bacteria) and water phase respectively . Add 3mL methanol into the solid phase and soak for 10min; add 15mL dichloromethane into the water phase three times, shake and extract for 3min each time, collect and combine the organic phases, evaporate to dryness on a nitrogen blower (50°C), and redissolve the residue in 1mL of acetonitrile, and then detected by liquid chromatography-mass spectrometry. It is found that the bacterium+MIM of the presen...

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Abstract

The invention provides an affinity adsorption biodegradation membrane and a preparation method of the affinity adsorption biodegradation membrane. The preparation method includes that polyving akohol (PVA) nanometer fibers simultaneously serves as fixed carriers of molecular engram nanoparticles and fixed carriers of microbes; and by means of a high-pressure static spinning technique, the molecular engram nanoparticles (MIPs) capable of specifically adsorbing target pollutants are enveloped in the PVA nanometer fibers, dominant bacteria capable of effectively degrading the target pollutants are adsorbed on a PVA membrane, and the affinity adsorption biodegradation membrane is obtained. The MIPs in the membrane can specifically and quickly adsorb the target pollutants, the dominant bacteria on the membrane can effectively degrade the target pollutants adsorbed by the MIPs, due to combination of the MIPs and the dominant bacteria, the purpose of specifically and effectively degrading the trace target pollutants is achieved, the trace target pollutants in a water body can be effectively degraded, and the membrane has the advantages of being high in degrading efficiency, resistant to interferences of impurities in water, quick in speed, free of secondary pollution and capable of being used repeatedly and the like, and is suitable for processing the trace target pollutants in the environmental water body with a large size.

Description

technical field [0001] The invention belongs to the fields of molecular imprinting technology, high-voltage electrospinning and biodegradation, and specifically relates to a preparation method of a novel material with specific molecular recognition ability and high-efficiency biodegradation ability, and the application of the material in degrading trace pollutants in water . technical background [0002] Environmental hormones (ECDs) refer to a class of compounds that can interfere with the synthesis, release, transport, binding, and metabolism of normal hormones in the body, and affect the normal function of the endocrine system. Bisphenol A (BPA) is mainly used in the production of polycarbonate plastics and epoxy resins, widely used in industry and household life, and has become one of the most common phenolic environmental hormones in environmental water (Kang, J.H., et al. , Human exposure to bisphenol A. Toxicology, 2006.226(2-3): p.79-89). Literature research shows ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F226/06C08F222/14C08J9/28B01J20/285B01J20/30C02F3/34
Inventor 吕斌刘倩
Owner HUAZHONG UNIV OF SCI & TECH
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