Use of Spirulina platensis micro and nanoparticles for the removal synthetic dyes from aqueous solutions by biosorption


Autoria(s): Dotto, Guilherme Luiz; Cadaval Junior, Tito Roberto Sant'Anna; Pinto, Luiz Antonio Almeida
Data(s)

05/10/2016

05/10/2016

2012

Resumo

In this research, micro and nanoparticles of Spirulina platensis dead biomass were obtained, characterized and employed to removal FD&C red no. 40 and acid blue 9 synthetic dyes from aqueous solutions. The effects of particle size (micro and nano) and biosorbent dosage (from 50 to 750 mg) were studied. Pseudofirst order, pseudo-second order and Elovich models were used to evaluate the biosorption kinetics. The biosorption nature was verified using energy dispersive X-ray spectroscopy (EDS). The best results for both dyes were found using 250 mg of nanoparticles, in these conditions, the biosorption capacities were 295 mg g−1 and 1450 mg g−1, and the percentages of dye removal were 15.0 and 72.5% for the FD&C red no. 40 and acid blue 9, respectively. Pseudo-first order model was the more adequate to represent the biosorption of both dyes onto microparticles, and Elovich model was more appropriate to the biosorption onto nanoparticles. The EDS results suggested that the dyes biosorption onto microparticles occurred mainly by physical interactions, and for the nanoparticles, chemisorption was dominant.

Identificador

DOTTO, Guilherme Luiz; CADAVAL JUNIOR, Tito Roberto Sant'Anna; PINTO, Luiz Antonio Almeida. Use of Spirulina platensis micro and nanoparticles for the removal synthetic dyes from aqueous solutions by biosorption. Process Biochemistry, v. 47, n. 9, p. 1335–1343, 2012. Disponível em:<http://www.sciencedirect.com/science/article/pii/S1359511312001808>. Acesso em 17 jul. 2014.

1359-5113

http://repositorio.furg.br/handle/1/6595

http://dx.doi.org/10.1016/j.procbio.2012.04.029

Idioma(s)

eng

Publicador

Elsevier

Direitos

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Palavras-Chave #Acid blue 9 #Biomass #Biosorption nature #FD&C red no. 40 #Kinetics
Tipo

article