Kinetics of Nitrate Reduction by Iron at Near Neutral pH

Electrochemical synthesis of FexNi1−x nanostructures for environmental remediation

“…Generally, the rate of pollutant transformation in zero-valent iron systems is pseudo-first-order [50,51,[56][57][58][59][60][61] with respect to pollutant concentration (Eq. (1)).…”

Nitrate-Contaminated Water Remediation Supported by Solid Organic Carbon and ZVI-Combined System

“…In situ chemical reduction of nitrate is achievable mainly using zero-valent iron (ZVI), which is the most frequently utilized media both in laboratory studies and field applications (Bruzzoniti and Fiore 2014;Obiri-Nyarko et al 2014;Kowalski and Søgaard 2014). Although previous studies have shown ZVI to be effective in nitrate reduction, this process has some drawbacks regarding product ammonium which must be successively removed (Alowitz and Scherer 2002;Huang and Zhang 2002;Su and Puls 2004); the requirement for acidic conditions (Fan et al 2009) and, furthermore, some coexistent ions and pollutants acting as ligands on ZVI significantly reduce nitrate reduction rate (Tang et al 2012). However, a study has shown that the use of hydrogenotrophic bacteria in the process of nitrate reduction by nanoscale ZVI can decrease the ammonium generation and transform nitrate to nitrogen gas ).…”

Physicochemical characterization of hydroxyapatite and its application towards removal of nitrate from water

“…However, maintaining biological processes at their optimum conditions is very difficult. In recent years chemical methods of nitrate removal using zero-valent metals like iron (Fe 0 ), aluminum (Al 0 ) and magnesium (Mg 0 ) has been studied intensively (Huang and Zhang, 2004;Huang and Zhang, 2002;Chen et al, 2005;Kielemoes et al, 2000;Fanning, 2000;Kumar and Chakraborty, 2006). In aqueous system at acidic pH, Fe 0 is oxidized to ferrous ion (Fe 2þ ) and nitrate ion is reduced to ammonia or nitrogen gas (Yang and Lee, 2005).…”