In this book, the environmental application and implication of nanoscale zerovlanet iron (NZVI) are studied. Reduction and removal of Bromate and TCE DNAPL using NZVI were evaluated for drinking water treatment and groundwater remediation. A visualization technique for TCE DNAPL removal using reactive NZVI and bimetallic nanoparticles was conducted using a glass micromodel with a view toward improved contaminant displacement. Inert/pseudo-inert gases, including argon, nitrogen, and carbon dioxide, were utilized to stabilize synthesized NZVI after lyophilization to prevent self-ignition. In...