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Functional nano-fiber based method for extracting and enriching pollutants in water

A functional nano- and nano-fiber technology is applied in the extraction technology of pollutant enrichment in water. The extraction field based on functional nano-fibers can solve the problems of low efficiency, complicated operation and high cost, and avoid environmental pollution, operation process and equipment. Simple, solvent-less effect

Inactive Publication Date: 2010-12-08
NANJING DONGJIAN BIOLOGICAL TECH
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  • Abstract
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Problems solved by technology

[0005] Technical problem: The purpose of the present invention is to overcome the defects of complex operation, high cost, and low efficiency of the prior art, thereby using functional nanofibers to extract membrane materials, utilizing the strong adsorption capacity of the surface of nanostructures, and modifying nanomaterials with various functional groups. The surface of the fiber structure makes it selectively adsorbable to different pollutants, providing an easy-to-operate, high-efficiency, and low-cost method for the enrichment and extraction of pollutants in water based on functional nanofibers

Method used

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Embodiment Construction

[0019] The present invention provides an extraction technology for enrichment of pollutants in water samples based on functional nanofibers, comprising the following steps:

[0020] 1) According to the chemical properties of the pollutants to be enriched, add functional substances that interact with them, use electrospinning technology to prepare functional nanofiber membrane materials, and install the membrane on a specific extraction device. Now taking polystyrene as an example, briefly describe its preparation steps:

[0021] Dissolving polystyrene (PS) in a mixture of N,N-dimethylformamide (DMF) and tetrahydrofuran (THF) to prepare a PS solution for electrospinning;

[0022] The diameter of the nanofiber is 10-1000nm, and the surface of the fiber is smooth or porous;

[0023] 2) After step 1) the functional nanofiber membrane material installed on the extraction device is soaked and activated with methanol or ethanol and water in sequence, it is placed in the water sample...

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Abstract

The pollutant-in-water enrichment and extraction method based on functional nano fiber comprises: with electronic-spinning technology, adding or not the functional material, or using post-process fiber surface, manufacturing fiber; preparing members with different diameter and thickness to match with proper fitting. This invention can improve interactive force between fiber and target, reduces balance time, and fit to instrumental analysis.

Description

technical field [0001] The invention relates to an extraction method based on functional nanofibers, in particular to an extraction technique for enriching pollutants in water. The invention belongs to the technical field of enrichment and extraction of pollutants in water. Background technique [0002] Due to the increasingly serious global chemical pollution, the persistent pollution of various inorganic and organic substances has gradually attracted people's attention to the environmental ecology and human health hazards. The detection of such pollutants has become a regular task of the environmental testing department. Work. [0003] At present, the methods for the enrichment of pollutants in water samples mainly include: liquid-liquid extraction, solid-phase extraction and solid-phase microextraction. The liquid-liquid extraction method generally has the characteristics of high extraction efficiency and small investment, but the liquid-liquid extraction method is only...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/34
Inventor 顾忠泽康学军戚东进张逸昀
Owner NANJING DONGJIAN BIOLOGICAL TECH
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