Portal de Periódicos da CAPES

Artigo Acesso aberto Produção Nacional Revisado por pares

BIBTEX RIS

Adsorption of anionic dyes from an aqueous solution by banana peel and green coconut mesocarp

2015; Taylor & Francis; Volume: 57; Issue: 30 Linguagem: Inglês

10.1080/19443994.2015.1063012

1944-3994

Graziele Elisandra do Nascimento, Natália Ferreira Campos, Jailson José da Silva, Celmy Maria Bezerra de Menezes Barbosa, Marta Maria Menezes Bezerra Duarte,

Dye analysis and toxicity

Banana peel (BP) and green coconut mesocarp (GCM) were evaluated as adsorbents for the removal of the dyes reactive gray BF-2R (RG), reactive turquoise Q-G125 and remazol golden yellow RNL-150% (RGY). Adsorbents were classified as mesoporous materials, with the pHzpc of 5 for BP and 7 for GCM. The initial pH of the best-adsorbing solution of the dyes was 2.0. There was no significant difference between the kinetic models evaluated by the F test at a 95% level of confidence, except for the RGY/GCM system. The adsorption process is not merely a function of an intraparticle diffusion step. The Freundlich model was the best fit for RGY/GCM, and no significant difference was evident between the two models evaluated for the other systems by the F test. For RG/BP, the models did not fit the experimental data. The adsorbents evaluated may be useful for the treatment of effluents that contain dyes.