Use of Sawdust of Aspen Tree for the Removal of Chromium (VI) from Aqueous Solution

Adsorption capacity of cr (vi) onto sawdust of aspen tree and activated sawdust, was investigated in a batch system byconsidering the effects of various parameters like contact time, initial concentration, ph , temperature, agitation speed, absorbentdose and particle size. cr (vi) removal is ph dependent and caused to be maximum at ph 2.0. the amounts of cr(vi) adsorbedincreased with increase in dose of both adsorbents and their contact time. experimental results show that the low cost biosorbent waseffective for the removal of pollutants from aqueous solution. the langmuir, freundlich and temkin isotherm were used to describethe adsorption equilibrium studies of agrowaste. freundlich isotherm shows better fit than langmuir and temkin isotherm in thetemperature range studied.