Predicting the Hydraulic Conductivity of Metallic Iron Filters: Modeling Gone Astray
Journal: Water, 20168, 4: -
DOI: https://doi.org/10.3390/w8040162
Persistent URL: http://resolver.sub.uni-goettingen.de/purl?gldocs-11858/6699
Persistent URL: http://resolver.sub.uni-goettingen.de/purl?gldocs-11858/6699
Noubactep, Chicgoua, 2016: Predicting the Hydraulic Conductivity of Metallic Iron Filters: Modeling Gone Astray. In: Water, Band 8, 4, DOI: 10.3390/w8040162.
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Since its introduction about 25 years ago, metallic iron (Fe0) has shown its potential
as the key component of reactive filtration systems for contaminant removal in polluted waters.
Technical applications of such systems can be enhanced by numerical simulation of a filter design
to improve, e.g., the service time or the minimum permeability of a prospected system to warrant
the required output water quality. This communication discusses the relevant input quantities into
such a simulation model, illustrates the possible simplifications and identifies the lack of relevant
thermodynamic and kinetic data. As a result, necessary steps are outlined that may improve the
numerical simulation and, consequently, the technical design of Fe0 filters. Following a general
overview on the key reactions in a Fe0 system, the importance of iron corrosion kinetics is illustrated.
Iron corrosion kinetics, expressed as a rate constant kiron, determines both the removal rate of
contaminants and the average permeability loss of the filter system. While the relevance of a
reasonable estimate of kiron is thus obvious, information is scarce. As a conclusion, systematic
experiments for the determination of kiron values are suggested to improve the database of this key
input parameter to Fe0 filters.
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