Nanoscale Zerovalent Iron and Its Composites for the Removal of Toxic Pollutants from Water

Organic chlorinated compounds and carcinogenic heavy metalsHeavy metals like arsenic in surface and groundwater are a worldwide problem. Therefore, these studies focus on the removal of chlorinated hydrocarbons (CHCs)Chlorinated hydrocarbons (CHCs) and heavy metalsHeavy metals (arsenic) from an aqueous environment by using only nano zerovalent iron (nZVI) and biochar-supported nZVI. Here, biochar is prepared from naturally occurring environmentally friendly materials and then nZVI decorated on its surface through a chemical reduction process. The composite materials have been used for CHCs and arsenic removal with variations in solution parameters. The mechanism of interaction between adsorbate and adsorbent has also been discussed. Here, nZVI decorated biochar can be a potential adsorbent for wastewater treatment.