for nitrate removal from aqueous solution

Groundwater contaminated by nitrate has become a worldwide problem. Existing technologies for nitrate removal, including zero-valent iron reduction, can only transform nitrate ions to predominantly NH þ 4 .A s a result, many studies have concentrated on seeking a solution to convert nitrate to N2. In this study, the efficiencies of nitrate removal from aqueous solution by single (TiO2 and nano zero valent iron, nZVI), and composite (Nano-TiO2–Fe 0