Adsorption of metal complex dyes from aqueous solutions by pine sawdust.
An attempt to alleviate the problem caused by the presence of metal complex dyes, mostly used in textile industries, in the textile effluents was undertaken. The effects of adsorbent particle size, pH, adsorbent dose, contact time and initial dye concentrations on the adsorption of metal complex dyes by pine sawdust was investigated. Acidic pH was favorable for the adsorption of metal complex dyes. A contact time of 120 min was required to reach the equilibrium. The experimental isotherm data were analyzed using the Langmuir, Freundlich and Temkin equations. The equilibrium data fit well the Langmuir isotherm. The monolayer adsorption capacities are 280.3 and 398.8 mg dye per g of pine sawdust for Metal Complex Blue and Metal Complex Yellow, respectively. The results indicate that pine sawdust could be employed as low-cost alternative to commercial activated carbon in aqueous solution for the removal of metal complex dyes.
Ozacar
Mahmut
M
Department of Chemistry, Science and Arts Faculty, Sakarya University, 54100 Sakarya, Turkey. mozacar@hotmail.com
Sengil
I Ayhan
IA
D000327:Adsorption; D004396:Coloring Agents / Q000302:isolation & purification / Q000493:pharmacokinetics*; D004391:Dust; D006863:Hydrogen-Ion Concentration; D007220:Industrial Waste; D008670:Metals / Q000302:isolation & purification / Q000493:pharmacokinetics*; D010316:Particle Size; D028223:Pinus / Q000737:chemistry*; D013783:Textile Industry / Q000379:methods; D013997:Time Factors; D014874:Water Pollutants, Chemical / Q000302:isolation & purification / Q000493:pharmacokinetics*; D018508:Water Purification / Q000379:methods*
D004396:Coloring Agents; D004391:Dust; D007220:Industrial Waste; D008670:Metals; D014874:Water Pollutants, Chemical