| Issue |
E3S Web of Conf.
Volume 396, 2023
The 11th International Conference on Indoor Air Quality, Ventilation & Energy Conservation in Buildings (IAQVEC2023)
|
|
|---|---|---|
| Article Number | 01115 | |
| Number of page(s) | 7 | |
| Section | Indoor Environmental Quality (IEQ), Human Health, Comfort and Productivity | |
| DOI | https://doi.org/10.1051/e3sconf/202339601115 | |
| Published online | 16 June 2023 | |
Comparison of resistance improvement to Aspergillus brasiliensis growth on recycled building materials by nano-metal impregnation and ozone treatment
1 Department of Civil and Environmental Engineering, National University of Kaohsiung, No. 700, Kaohsiung University Rd., Kaohsiung, Taiwan
2 Department of Civil and Environmental Engineering, National University of Kaohsiung, No. 700, Kaohsiung University Rd., Kaohsiung, Taiwan
* Corresponding author: chichilin@nuk.edu.tw
This study explores the potential of nanometal and ozone treatment to improve the Aspergillus brasiliensis resistance of recycled building materials (RBMs). RBMs include gypsum board (GB), waterproof gypsum board (WGB), calcium silicate board (CSB), and fiber cement board (FCB). The A. brasiliensis was inoculated on each sample, and their growth was visually evaluated according to ASTM G21-09. The results show that the effect of the treatment with nano-silver of 0.015 g/L and 0.03 g/L solution by impregnation was similar to that of the treatment with 60 ppb concentration of ozone for 4 hours: rating 3 on GB, rating 1 on WGB, rating 1 on CSB, and rating 1 on FCB. The antifungal effects of different building materials treated with different types and concentrations of nanometals or ozone are different. All the tested nanometals or ozone of the selected concentrations failed to provide complete protection against fungal growth on the four tested BMs. However, it is supposedly confirmed that the higher the nanometal concentration was, the longer the lag period until fungi growth began, and fewer fungi grew on the materials.
© The Authors, published by EDP Sciences, 2023
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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