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

被引：0
作者：
Sanchez, Nedher [1 ]
Vazquez, Mario [1 ]
Torresi, Roberto [2 ]
机构：
[1] Univ Antioquia, Fac Ciencias Exactas & Nat, Inst Quim, Medellin 1226, Colombia
[2] Univ Sao Paulo, Inst Quim, BR-26077 Sao Paulo, Brazil
来源：
REVISTA FACULTAD DE INGENIERIA-UNIVERSIDAD DE ANTIOQUIA | 2010年 / 55期
关键词：
Zerovalent iron particles (ZVI); azo dye; sorption; kinetics; pseudo-second order; REMOVAL; WASTE; WATER; EQUILIBRIUM; KINETICS; BLUE; DECOLORIZATION; IONS; ASH;
D O I：
暂无
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
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.
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页码：18 / 25
页数：8
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