Biosorption of phenol onto bionanoparticles from Spirulina sp LEB 18

JOURNAL OF COLLOID AND INTERFACE SCIENCE

卷:407

Article

Dotto, G. L.¹  Goncalves, J. O.¹  Cadaval, T. R. S., Jr.¹  Pinto, L. A. A.¹ 

[1] Fundacao Univ Fed Rio Grande, Sch Chem & Food, Unit Operat Lab, BR-96203900 Rio Grande, RS, Brazil

关键词: Biosorption;    Equilibrium isotherms;    Phenol;    Thermodynamics;   

DOI  :  10.1016/j.jcis.2013.06.044

来源: Elsevier

【 摘 要 】

The biosorption of phenol onto bionanoparticles from Spirulina sp. LEB 18 was studied. Firstly, the bionanoparticles were prepared from Spirulina sp. strain LEB 18 and characterized. After, response surface methodology was employed to optimize the biosorption process as a function of pH (3.2-8.8) and bionanoparticles dosage (0.15-1.85 g L-1). Finally, equilibrium and thermodynamic studies were performed at different temperatures (298-328 K). The bionanoparticles presented hydrodynamic diameter of 232 +/- 3 nm and polydispersity index of 0.150. It was found that the more adequate condition for the phenol biosorption was pH of 6.0 and bionanoparticles dosage of 1.85 g L-1. The Langmuir model presented satisfactory fit with the equilibrium experimental data. The maximum biosorption capacity was 159.33 mg g(-1), obtained at 298 K. The thermodynamic parameters showed that the biosorption was a spontaneous, favorable and exothermic process. Based on these results, it can be affirmed that the bionanoparticles are an alternative, renewable and eco-friendly biosorbent to removal phenol from aqueous solutions. (c) 2013 Elsevier Inc. All rights reserved.

【 授权许可】

Free