An Overview of Reactivity for Various Nano Zero Valent Iron Particles Towards Fenton’s Oxidation

Historically Fenton’s reaction, under darkness or under light conditions, is considered a homogeneous process. The most important characteristic of Fenton’s reagent is related to its preparation due to it is an effective catalyst just using iron (II) ions, from specifically iron(II) sulphate salt (FeSO₄), and hydrogen peroxide (H₂O₂). But with advancement of technology researchers are shifted to nano dimension and the traditional Fenton’s oxidation reactions are replaced by heterogeneous Fenton type reactions using various forms of nano zero-valent iron. It has been observed that there occurs a marked difference among various forms of nZVI, bare, ligand stabilized and composites towards the reaction with hydrogen peroxide. Primarily rate of hydroxyl radical production is greatly affected. The rate of pollutant’s removal from synthetic or industrial wastewater was also influenced. In this review article, we have summarized the reason of varying reactivity and tried to find out the best possible solution towards water pollution abetment