Degradation and adsorption of AZO RR239 dye in aqueous solution by nanoscale zerovalent iron particles immobilized on sawdust

作者：Sanchez Nedher^*; Vazquez Mario; Torresi Roberto

来源：Revista Facultad de Ingenieria-Universidad de Antioquia, 2010, (55): 18-25.

• Zerovalent iron particles (ZVI)
• azo dye
• sorption
• kinetics
• pseudo-second order

Carra sawdust pretrated with formaldehyde was used to adsorb RR239 (reactive azo dye) at varying pH and zerovalent iron (ZVI) dosage. Modeling of kinetic results shows that sorption process is best described by the pseudo-second-order model. Batch experiments suggest that the decolorization efficiency was strongly enhanced with the presence of ZVI and low solution pH. The kinetics of dye sorption by mixed sorbent (5 g of sawdust and 180 mg of ZVI) at pH 2.0 was rapid, reaching more than 90% of the total discoloration in three minutes.

• 出版日期2010-9