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Bone char is a highly efficient fluoride removal material, however, its lifespan is rather limited. Laboratory experiments reveal that the addition of pellets containing phosphate and calcium can extend the lifespan of bone char filters.
Newspaper or Magazine Article
Improving fluoride removal efficiency
Müller, Kim (Sanitation, Water and Solid Waste for Development SANDEC)
Mattle, Michael (Water Resources and Drinking Water W+T)
Osterwalder, Lars (Water Resources and Drinking Water W+T)
Johnson, Annette (Water Resources and Drinking Water W+T)