The effect of pH on As(V) adsorptionwas studied by using the membrane
with the maximum adsorption capacity. In this regard 0.1 g of
membrane was immersed in the 100 ml solution containing 100 ppb
As(V) at different pH ranging between 3 and 11. Under continuous
shaking for 24 h at 25 °C, the concentration of As(V) of each pH solution
was determined.