Adsorption of Arsenite and Fluoride on Untreated and Treated Bamboo Dust - Management of Natural Resources in a Changing Environment - page 169

10

8

6

4

2

0

0 5 10 15 20

Fluoride (mg/L)

B1 B2 B3 B4

63

43

23

3

0 25 50 75 100

Arsenite (µg/L)

Fig. 3 Influence of concentration on adsorption of fluoride ( top ) and arsenite ( bottom )

Influence of Adsorbent Amount

When the amount of the adsorbent was increased from 1 to 3 g/L (fluoride 1.5 mg/L
and arsenite is 100 ʼg/L), the amount adsorbed per unit mass of the adsorbent
decreased (Fig. 4 ) in both the cases. This may be due to two reasons: (i) a large
adsorbent amount reduces the unsaturation of the adsorption sites and,