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. 2014 May;80(10):3081–3085. doi: 10.1128/AEM.00241-14

TABLE 1.

Combinations of fluoride and phosphorus doses used in the adsorption assay as defined by the composite central designa

Component Concn (mg liter−1) used in indicated combination
1 2 3 4 5 6 7 8 9 10 11 12 13 14
F− 7.5 7.5 22.5 22.5 15 15 15 15 15 0 30 15 15 15
P 50 150 50 150 100 100 100 0 200 100 100 100 100 100
a

The whole experiment was performed separately for each adsorbent, namely, biochar and Al2O3.