Sandwich micro-nano fiber composite membrane loaded with microorganisms and its preparation method and application

Abstract

The invention discloses a method for preparing a microorganism-loaded sandwiched micro-nano fiber composite membrane capable of adsorbing heavy metals on the basis of alternate use of electrostatic spinning and electrostatic spraying. The method comprises the steps that a polymer composite is dissolved into an organic solvent, and magnetic stirring is conducted to obtain a mixed solution; a micro-nano fiber membrane is prepared through an electrostatic spinning technology; microorganisms are dispersed into deionized water, and the solution is stirred to be uniform and electrostatically sprayed on the surface of the micro-nano fiber membrane; a sample is put into a vacuum drying oven to be dried till the solvent is completely volatilized, and a double layer is obtained; the microorganism-loaded sandwiched micro-nano fiber composite membranes with the different needed odd and even layer numbers can be obtained through repeated operation. What is more novel is that the material can achieve repeated desorption and reutilization and is significant in adsorption effect; in addition, the method is low in raw material cost, good in biocompatibility, mild in reaction condition, wide in applicability and the like and is expected to be applied to large-scale industrial production.

Description

technical field [0001] The invention belongs to the field of new materials, and specifically relates to a sandwich micro-nano fiber composite membrane loaded with microorganisms prepared alternately by electrospinning and electrostatic spraying, a preparation method thereof, and an application thereof in the field of repairing heavy metal pollution. Background technique [0002] Since the 20th century, with the rapid development of science and technology, while promoting economic development and improving people's living standards, human beings have also paid a heavy price. For example, with the rapid development of industries such as metallurgy, mining, electroplating, pesticides and leather, papermaking and battery manufacturing, various sewage containing heavy metals are directly or indirectly discharged to the external environment. With the continuous enrichment of the biological chain, it exceeds the normal range. It directly threatens human health and leads to the dete...

AI Technical Summary

Problems solved by technology

[0010] Although there are many researches and patents related to immobilized microorganisms, there is still no electrostatic spraying of raw materials on the nanofiber membranes prepared by electrospinning as in the present invention, and the process of alternating electrospinning-electrostatic spraying to obtain microorganism-loaded An example of a sandwich micro-nano fiber composite membrane. In addition, adding it to the reaction system has the advantages of easy operation, non-toxic, harmless, reusable, and low cost.

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