CHUNG MING SU, ROBERT W. PULS
Recent studies have revealed the potential of zerovalent iron (Fe0) to serve as a chemical medium in permeable reactive barriers (PRBs) for groundwater nitrate remediation. This study aimed to investigate the effects of various organic and inorganic ligands on the efficiency of nitrate reduction by Fe0. A series of experiments were conducted using a 25.0 mL solution of 20.0 mg N L-1 nitrate reacted with 1.000 g of Peerless Fe0 at 20 °C for up to 120 hours, in the presence of specific acids, yielding an uncontrolled H+ concentration of 3.0 M at pH < 9.3. Results demonstrated that nitrate reduction rates were influenced by the ligands tested, following a specific order from formic acid to HCl. Correlation analysis indicated a negative relationship between nitrate reduction rates and the stability constants of soluble complexes with Fe0 or Fe3+ ions, highlighting the role of surface adsorption and complexation. The findings suggest that specific ligands could hinder nitrate reduction by Fe0, necessitating adjustments in PRB designs to account for the presence of these ligands at contaminated sites. Overall, the study underscores the importance of understanding ligand interactions to optimize the use of Fe0 in nitrate remediation applications.
@article{82e8eb5c-2c95-4845-9873-782326f555f9,
title={Nitrate Reduction by Zerovalent Iron Eff},
author={CHUNG MING SU and ROBERT W. PULS},
year={2026},
language={en}
}TY - JOUR TI - Nitrate Reduction by Zerovalent Iron Eff AU - CHUNG MING SU AU - ROBERT W. PULS PY - 2026 LA - en ER -
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