Method for inactivating aspergillus niger spores in water body

The silver single-atom-graphite phase carbon nitride composite material prepared by adding ClO2 to water and using frozen photoreduction method, the melanin protective layer of Aspergillus niger spores was destroyed, and the visible photocatalyst was used to achieve efficient inactivation of Aspergillus niger spores was solved, and the problems of poor inactivation effect and by-product generation in the prior art were solved, and efficient and safe disinfection effect was achieved.

CN119707020AActive Publication Date: 2025-03-28BEIJING NORMAL UNIVERSITY
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Patent Information

Application Number
CN202510228750.2
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-02-28
Publication Date
2025-03-28
Estimated Expiration
2045-02-28

AI Technical Summary

Technical Problem

The prior art is not effective when inactivated Aspergillus niger spores in water, especially due to the high reactivity of melanin to oxidative disinfectants, which leads to excessive consumption of disinfectants and may produce carcinogenic by-products.

Method used

The silver single-atom-graphite phase carbon nitride composite was prepared by frozen photoreduction method, and ClO2 was added under light conditions to destroy the melanin protective layer of Aspergillus niger spores. Under visible light irradiation conditions, the composite material is placed in water to act as an efficient photocatalyst to achieve efficient inactivation of Aspergillus niger spores.

Benefits of technology

It achieves efficient and rapid inactivation of Aspergillus niger spores, reduces the amount of disinfectant used, avoids the generation of carcinogenic by-products, and is simple to operate and low cost.

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Abstract

The invention provides a method for inactivating aspergillus niger spores in a water body, relates to the technical field of inactivation of pathogenic microorganisms in the water body, and aims to solve or improve the technical problem of poor inactivation effect of the aspergillus niger spores in the prior art. The inactivation method of the aspergillus niger spores in the water body comprises the following steps: preparing a silver monatomic-graphite phase carbon nitride composite material by adopting a freezing photoreduction method; the method comprises the following steps: adding ClO2 into a to-be-detected water body containing aspergillus niger spores under a dark condition; under the condition of visible light irradiation, the silver monatomic-graphite phase carbon nitride composite material is put into a water body to be detected so as to inactivate aspergillus niger spores. According to the method for inactivating the aspergillus niger spores in the water body, ClO2 can destroy a melanin protective layer of the aspergillus niger spores, so that spore cells are exposed to the outside, and the silver monatomic-graphite phase carbon nitride composite material can be in close contact with the exposed spore cells through an adsorption effect, so that the composite material can be used as an efficient photocatalyst; and the inactivation effect on the spores is realized on the interface of the spores.
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