Adsorption of Arsenite and Fluoride on Untreated and Treated Bamboo Dust - Management of Natural Resources in a Changing Environment - page 170

1.0

B1 B2 B3 B4

0.8

0.6

0.4

0.2

0.0

1.0 1.5 2.0 2.5 3.0

Adsorbent (g/L)

72

52

32

12

1 2 3

Adsorbent (g/L)

Fig. 4 Influence of adsorbent amount on adsorption of fluoride ( top ) and arsenite ( bottom )

correspondingly, the number of such sites per unit mass comes down, resulting in
comparatively less adsorption at higher adsorbent amount, and (ii) higher adsorbent
amount creates particle aggregation, resulting in a decrease in the total surface area
and an increase in diffusional path length, both of which contribute to a decrease in
amount adsorbed per unit mass (Yu et al. 2000 ).