We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
H<sub>3</sub>PO<sub>4</sub>-activated carbons produced from açai stones and Brazil nut shells: removal of basic blue 26 dye from aqueous solutions by adsorption.
- Authors
de Souza, Thielle Nayara Vieira; Vieira, Melissa Gurgel Adeodato; da Silva, Meuris Gurgel Carlos; Brasil, Davi do Socorro Barros; de Carvalho, Samira Maria Leão
- Abstract
The adsorption characteristics of C.I. basic blue 26 (BB26) from aqueous solutions onto H3PO4-activated carbons (ACs) produced from açai stones (Euterpe oleracea Martius) and Brazil nut shells (Bertholletia excelsa H. B. K) were investigated in a batch system. The ACs were characterized by XRD, FT-IR, N2 adsorption at 77 K, mercury porosimetry, and acidity/basicity analysis. The pseudo-first-order, pseudo-second-order kinetic models and intraparticle diffusion model were used for the kinetic interpretations. The adsorption processes follow the pseudo-second-order kinetic model. The Boyd plots revealed that the adsorption processes were mainly controlled by film diffusion. Equilibrium data were analyzed by the Langmuir and Freundlich models, at different temperatures. The equilibrium data were best represented by the Langmuir isotherm. The adsorption processes were found to be favorable, exothermic, and spontaneous. The açai stones and Brazil nut shells-based ACs were shown to be effective adsorbents for removal of BB26 from aqueous solutions.
- Subjects
ACTIVATED carbon; AQUEOUS solutions; ADSORPTION (Chemistry); LANGMUIR isotherms; ACAI palm; NUTS
- Publication
Environmental Science & Pollution Research, 2019, Vol 26, Issue 28, p28533
- ISSN
0944-1344
- Publication type
Article
- DOI
10.1007/s11356-019-04215-0