Green Rust: Its Electrochemical Generation, Characterization, and Implications
LAMAR UNIV BEAUMONT TX
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Green rust is an important intermediate in oxidative transformation of FeII phase. This unstable compound contains a mixture of ferrous and ferric hydroxides that belong to a family of minerals known as layered double hydroxides LDH. Its general formula is FeII 6-x FeIII x OH12xAxn- yH2O x-, where A is an n-valent anion mainly Cl-, CO3 -2 and SO4 -2 , and in which either the bivalent or the trivalent iron can be replaced for other trivalent or bivalent metal ions. It was first identified as corrosion product, later in soils as a product of interactions between microbes and metals in soils. Due to its high reactivity, it is used in the reduction of organic and inorganic compounds, As removal, and the treatment of acid mine drainage. In this paper, we described the method of electrochemical generation of green rust, its characterization by XRD, SEM and FTIR and its implications to electrocoagulation.
- Physical Chemistry
- Properties of Metals and Alloys