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Extending Service Life of Household Water Filters by Mixing Metallic Iron with Sand
Author(s) -
Noubactep Chicgoua,
Caré Sabine,
TogueKamga Fulbert,
Schöner Angelika,
Woafo Paul
Publication year - 2010
Publication title -
clean – soil, air, water
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.444
H-Index - 66
eISSN - 1863-0669
pISSN - 1863-0650
DOI - 10.1002/clen.201000177
Subject(s) - clogging , filter (signal processing) , mixing (physics) , service life , filtration (mathematics) , materials science , quartz , metal , expansive , metallurgy , slow sand filter , environmental science , environmental engineering , geotechnical engineering , water treatment , engineering , composite material , mathematics , geography , physics , electrical engineering , statistics , archaeology , quantum mechanics , compressive strength
Abstract The use of metallic iron filters (Fe 0 filters) has been discussed as a promising low‐cost option for safe drinking water production at household level. Filter clogging due to the volumetric expansive nature of iron corrosion has been identified as the major problem of Fe 0 filters. Mixing Fe 0 and sand (yielding Fe 0 /sand filters) has been proposed as a tool to extent filter service life. However, no systematic discussion rationalizing Fe 0 /sand mixtures is yet available. This communication theoretically discussed suitable Fe 0 /sand proportions for efficient filters. Results suggested that Fe 0 /sand filters should not contain more that 50 vol% Fe 0 (25 wt% when Fe 0 is mixed with quartz). The actual Fe 0 percentage in a filter will depend on its intrinsic reactivity.