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Chemical Engineering Journal ; 431:8, 2022.
Article in English | Web of Science | ID: covidwho-1800163

ABSTRACT

With the outbreak of COVID-19, microbial pollution has gained increasing attention as a threat to human health. Consequently, many research efforts are being devoted to the development of efficient disinfection methods. In this context, hydrogen peroxide (H2O2) stands out as a green and broad-spectrum disinfectant, which can be produced and sprayed in the air directly by cavitation in ultrasonic nebulisation. However, the yield of H2O2 obtained by ultrasonic nebulisation is too low to satisfy the requirements for disinfection by spraying and needs to be improved to achieve efficient disinfection of the air and objects. Herein, we report the introduction of a zinc layer into an ultrasonic nebuliser to improve the production of H2O2 and generate additional Zn2+ by self-corrosion, achieving good disinfecting performance. Specifically, a zinc layer was assembled on the oscillator plate of a commercial ultrasonic nebuliser, resulting in a 21-fold increase in the yield of H2O2 and the production of 4.75 mu g/mL Zn2+ in the spraying droplets. When the generated water mist was used to treat a bottle polluted with Escherichia coli for 30 min, the sterilisation rate reached 93.53%. This ultrasonic nebulisation using a functional zinc layer successfully enhanced the production of H2O2 while generating Zn2+, providing a platform for the development of new methodologies of spray disinfection.

2.
Journal of Ecology and Rural Environment ; 36(12):1505-1513, 2020.
Article in Chinese | Scopus | ID: covidwho-1229536

ABSTRACT

The widespread outbreak of COVID-19 in 2020 has aroused great concern of the government and the public on the environmental management and safe disposal of medical wastes. Developed countries have established a relatively comprehensive medical waste management system, while the China's medical waste management system and treatment methods still need to be improved. The current status of the production, management and disposal of medical wastes were analyzed systematically in this paper to summarize and analyze the problems of medical waste management and disposal in China. Learned from the foreign practices, effective methods such as strengthening the classified medical waste collection management system, the establishment of the producers responsible recycling system, the full implemention of the centralized processing system, the strengthening of the whole process of tracking management of each link, the deepening of the disposal technology research, and the building of the emergency disposal of medical wastes management system were put forward to provide references for further standardizing the development in this field. © 2020, China Environmental Science Press. All rights reserved.

3.
Biophysical Journal ; 120(3):244A-244A, 2021.
Article in English | Web of Science | ID: covidwho-1187643
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