Hazim A. Al-Zubaidi

For many decades, organohalide and organophosphate compounds have shown significant detrimental impact on the environment. Consequently, strategies for their remediation continue to be an area of emerging need. The reduction of the chlorpyrifos pesticide, a molecule that bears both organohalide and organophosphate functional groups, is an important area of investigation due to it toxic nature. In this report, we demonstrate the effectiveness of the biological molecule, flavin mononucleotide (FMN) toward chemically reducing chlorpyrifos. The FMN was found to be highly active when anchored to nanocrystalline TiO₂ surfaces. The results show new directions toward the remediation of organic contaminants under mild reaction conditions.

Construction workers face the possibility of exposure to nanomaterials, which are particles smaller than asbestos. Nanomaterials exposure is expected to increase in coming years because of the advantages and desirable characteristics of nanoconstruction products. The lack of knowledge and preparedness in the construction industry for this technology is apparent. There are few research studies in the United States that have evaluated the potential safety and health risks of construction nanomaterials on the construction workforce. The Center for Construction Research and Training (CPWR) has built a database containing more than 400 construction products in the United States that may contain nanomaterials. This paper investigates the nature of the nanoparticles in these construction products. Additionally, a sample of the possible safety and health hazards affecting construction workers is provided. The findings confirm the industry’s lack of preparedness regarding the potential risks of construction nanomaterials, which may create or exacerbate unsafe conditions. Finally, the paper points out the necessity of communicating the potential hazards of nanoparticles to the construction workforce in contact with these products.