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Por favor, utilize esse identificador para citar este item ou usar como link: http://repositorio.ufla.br/jspui/handle/1/11273

Título: Castor bean (Ricinus communis L.) presscake from biodiesel production: an efficient low cost adsorbent for removal of textile dyes
Autor(es): Magriotis, Zuy M.
Carvalho, Mohana Z.
Sales, Priscila F. de
Alves, Fernanda C.
Resende, Ricardo F.
Saczk, Adelir Aparecida
Assunto: Castor bean presscake
Biosorbent
Biodiesel
Dye
Malachite green
Tropaeolin
Publicador: Elsevier
Data de publicação: 16-Jun-2016
Referência: MAGRIOTIS, Z. M. et al. Castor bean (Ricinus Communis L.) presscake from biodiesel production: an efficient low cost adsorbent for removal of textile dyes. Journal of Environmental Chemical Engineering, [S.l.], v. 2, n. 3, p. 1731–1740, Sept. 2014.
Abstract: Castor bean (Ricinus communis L.) presscake, a byproduct derived from the biodiesel production process, was used in natura (CN) and thermally treated (CT) form as a natural and low-cost adsorbent for the removal of the dyes malachite green (MG) and tropaeolin (TP). The CN and CT were characterized by elemental analysis, infrared spectroscopy (FTIR), N2 adsorption/desorption and zeta potential. The effects of initial dye solution concentration, adsorbent mass/adsorbate volume ratio, initial pH of dye solution and contact time on MG and TP adsorption were studied using batch-type experiments a 25 °C. The equilibrium adsorption was analysed by Langmuir, Freundlich, Sips, dual site Sips (DSS) and Dubinin–Radushkevich (D–R) isotherms. Kinetics data were evaluated by pseudo-first order and pseudo-second order models. The adsorption data of MG and TP dyes onto CN and CT were best fitted to the dual site Sips model. The maximum adsorption capacities were 37.10, 33.54, 18.60 and 55.98 mg g−1 for the systems MG/CN, MG/CT, TP/CN and TP/CT, respectively. Pseudo-second order gives the better correlation to predict the kinetic process. The thermodynamic aspects were analysed.
URI: http://www.sciencedirect.com/science/article/pii/S221334371400147X
http://repositorio.ufla.br/jspui/handle/1/11273
Idioma: en_US
Aparece nas coleções: DQI - Artigos publicados em periódicos

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