Comparison of resistance improvement to <i>Aspergillus brasiliensis</i> growth on recycled building materials by nano-metal impregnation and ozone treatment

This study explores the potential of nanometal and ozone treatment to improve Aspergillus brasiliensis resistance recycled building materials (RBMs). RBMs include gypsum board (GB), waterproof (WGB), calcium silicate (CSB), fiber cement (FCB). The A. was inoculated on each sample, their growth visually evaluated according ASTM G21-09. results show that effect with nano-silver 0.015 g/L 0.03 solution by impregnation similar 60 ppb concentration for 4 hours: rating 3 GB, 1 WGB, CSB, FCB. antifungal effects different treated types concentrations nanometals or are different. All tested selected failed provide complete protection against fungal four BMs. However, it is supposedly confirmed higher was, longer lag period until fungi began, fewer grew materials.