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Flaws in the design of Fe(0)-based filtration systems?
- Noubactep, Chicgoua
- Chemosphere 2014 v.117 pp. 104-107
- filters, filtration, hydroxides, iron, iron oxides, pH, porosity, water treatment
- Use of metallic iron (Fe(0)) for water treatment has attracted much attention over the passed two decades. Achieved results have recalled that the formation of voluminous, low-soluble iron oxides and hydroxides within the system is ubiquitous at pH>4.0. These properties imply that efficiency and porosity of Fe(0)-based filtration systems will decrease in the long-term. Some methods have been suggested to solve the identified problems. However, they could be collectively regarded as weak because they are based on a false description of the system. This note reveals two major inherent flaws in the design of Fe(0)-based filters and shows ways to fix them.