NANOFER 25

Kinetics and pathways for the debromination of polybrominated diphenyl ethers by bimetallic and nanoscale zerovalent iron: Effects of particle properties and catalyst
In this study, two kinds of commercially available nanoscale Fe0 slurries (NANOFER 25 and 25S), a freeze-dried laboratory-synthesized Fe0 nanoparticle (nZVI), and their palladized forms were used to investigate the effect of particle properties and catalyst on PBDE debromination kinetics and pathways. NANOFERs and their palladized forms were found to debrominate PBDEs effectively. The laboratory-synthesized Fe0 nanoparticles also debrominated PBDEs, but were slower due to deactivation by the freeze-drying and stabilization processes in the laboratory synthesis. An organic modifier, polyacrylic acid (PAA), bound on NANOFER 25S slowed PBDE debromination by a factor of three to four compared to NANOFER 25.

Measuring the reactivity of commercially available zero-valent iron nanoparticles used for environmental remediation with iopromide
Iopromide was rapidly dehalogenated by the investigated nZVI particles, following pseudo-first order reaction kinetics that was independent of the experimental conditions. The specific surface area normalized reaction rate constant (kSA) value in the batch reactors ranged between 0.12 and 0.53 L m−2 h−1; it was highest for the uncoated NANOFER 25 particles, followed by the polyacrylic acid-coated NANOFER 25S and air-stable NANOFER STAR particles. In the batch reactors all particles were less reactive in natural water than in synthetic water.