Adsorção do corante reativo laranja 16 de soluções aquosas por zeólita sintética

Química Nova

Terezinha Elizabeth Mendes De Carvalho¹  Denise Alves Fungaro¹  Juliana De Carvalho Izidoro¹ 

[1] ,Instituto de Pesquisas Energéticas e Nucleares Centro de Química e Meio Ambiente São Paulo SP ,Brasil

关键词: coal fly ash;    zeolite;    reactive dye adsorption;   

DOI  :  10.1590/S0100-40422010000200023

来源: SciELO

【 摘 要 】

Coal fly ash, a waste generated in a coal-fired electric power plant, was used to synthesize zeolite by hydrothermal treatment with NaOH solution. This zeolite was used as adsorbent to investigate the adsorption kinetics and isotherm parameters of the reactive orange 16 (RO16) dye from aqueous solutions at different concentrations (1.3-15.4 mg L-1). Three kinetic models, the pseudo-first-order, second-order, and intraparticle diffusion were used to predict the adsorption rate constants. The kinetics of adsorption of the RO16 dye followed pseudo-second-order kinetics. The adsorption isotherm data were closely fitted to the Langmuir equation. Keywords: coal fly ash; zeolite; reactive dye adsorption.

【 授权许可】

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