Adsorption of Arsenite and Fluoride on Untreated and Treated Bamboo Dust - Management of Natural Resources in a Changing Environment - page 164

Table 1 Experimental conditions
Type of study Conditions
Effects of pH Adsorbent1g/L
F − andAs(III)volume50mL
Concentration F − 1.50mg/L,As(III)100 ʼg/L
Temperature 300 K
AdsorptiontimeF − 240min/As(III)300min
pH6.0-8.5(intervalsof0.5)forbothF − andAs(III)
Kinetics Adsorbent1g/L
F − andAs(III)volume50mg/L
Concentration F − 1.50mg/L,As(III)100 ʼg/L
Temperature 303 K
Adsorptiontime0,5,10,15,30,45,60,90,120,180,40min
pH F − 5.7±0.05,As(III)6.5±0.05
Effects of adsorbent amount Adsorbent1.0,1.5,2.0,2.5,3.0,3.5g/L
F − andAs(III)volume50mL
Concentration F − 1.50mg/L,As(III)100 ʼg/L
Temperature 300 K
AdsorptiontimeF − 240min,As(III)300min,
pH as prepared for both F − andAs(III)
Effects of anion concentration AmountofAdsorbent1g/L;
F − andAs(III)volume50mg/L;
Temperature 300 K
AdsorptiontimeF − 240min,As(III)300min
Concentration F − 2.5, 5.0, 7.5, 10.0, 12.5, 15.0, 17.5,
20.0 mg/L
As(III)10,20,30,40,50,60,70,80,90,100 ʼg/L

Isotherm Adsorbent1g/L

F − andAs(III)volume50mg/L
Temperature 300 K
AdsorptiontimeF − 240min,As(III)300min
Concentration F − 2.5, 5.0, 7.5, 10.0, 12.5, 15.0, 17.5,
20.0 mg/L
As(III)10,20,30,40,50,60,70,80,90,100 ʼg/L

of hydroxyl ions on the surface leading to formation of aqua-complexes and reduc-
ing sorption (Venkata Mohan et al. 2003 ).

Effects of Adsorption Time and Kinetics

Adsorbent-adsorbateinteractionwasstudiedasafunctionoftimeatpH5.70±0.05
forluorideand6.50±0.05forarseniteat300Kfor4and5hrespectively.Amount
adsorbed per unit mass increased gradually with time and attained equilibrium