Dye removal from aqueous solution by adsorption on treated sawdust.
Formaldehyde treated and sulphuric acid treated saw dusts were used to adsorb malachite green at varying dye concentration, adsorbent dose, pH and agitation time. Similar experiments were conducted with laboratory grade activated carbon to compare the results. The adsorption efficiency of sulphuric acid treated sawdust (SD) was higher than formaldehyde treated SD. The adsorption followed first order rate expression and Lagergren equation. An initial pH in the range of 6-9 was favorable for the dye removal by both the adsorbents. Dilute solutions were effectively decolorized by the adsorbents. It is proposed that in batch or stirred tank reactors, both adsorbents can be an attractive option for dye adsorption.
Garg
V K
VK
Department of Environmental Science and Engineering, Guru Jambheshwar University, Hisar, 125001, Haryana, India. vinodkgarg@yahoo.com
Gupta
Renuka
R
Bala Yadav
Anu
A
Kumar
Rakesh
R
D000327:Adsorption; D004396:Coloring Agents / Q000302:isolation & purification*; D004202:Disinfectants / Q000737:chemistry; D005557:Formaldehyde / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D013464:Sulfuric Acids / Q000737:chemistry; D018508:Water Purification / Q000379:methods*; D014934:Wood
D004396:Coloring Agents; D004202:Disinfectants; D013464:Sulfuric Acids; D005557:Formaldehyde; C033158:sulfuric acid