Adsorption of reactive orange 16 from aqueous solutions by synthesized zeolite

Química Nova

Instituto de Pesquisas Energéticas e Nucleares, São Paulo, Brasil¹  Carvalho, Terezinha Elizabeth Mendes de¹  Fungaro, Denise Alves¹  Izidoro, Juliana de Carvalho¹ 

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

DOI  :  10.1590/S0100-40422010000200023

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 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.

【 授权许可】

Unknown