Evaluating of Agave americana fibers for biosorption of dye from aqueous solution
Makaleler > Tam Makale · 2015
Yazarlar: Aylin Altinisik, Yoldas Seki, Savas Ertas, Emine Akar, Ebru BOZACI, Yasemin Seki
Fibers and Polymers, SCI Expanded İndekslerine Giren Dergi, Uluslararası, Wos, 2015, cilt 16, ss 370-377
DOI: 10.1007/s12221-015-0370-9
Özet
Fibers extracted from Agave americana were evaluated as a low cost sorbent for the removal of Malachite Green (MG) from aqueous solution. Agave fiber was characterized by using X-ray diffraction (XRD), thermal gravimetric analysis (TGA), scanning electron microscopy (SEM), and determining chemical content such as cellulose and hemicellulose. The crystallinity index and average size of crystals of agave fibers were obtained to be 53.29 % and 1.4 nm, respectively. The effects of temperature, amount of sorbent and ionic strength on biosorption behavior were investigated. By using Langmuir, Freundlich, and Dubinin-Radushkevich equations, equilibrium biosorption data were analyzed. Based on R-2 values, the best fit was provided with Langmuir isotherm. The results showed that the largest biosorption capacity was obtained as 33 mg g(-1) at 318 K. According to the thermodynamic studies, biosorption was determined to be endothermic and spontaneous in nature. Biosorption kinetics was investigated by equations such as Elovich rate equations, intraparticle diffusion models, pseudo-second-order, and pseudo-first-order models.