naa a22 4500 510752535 CHVBK 20180411083109.0 cr unu---uuuuu 180411e20130201xx s 000 0 eng 10.1007/s11270-012-1427-7 doi (NATIONALLICENCE)springer-10.1007/s11270-012-1427-7 Removal of Tannery Dye from Aqueous Solution Using Papaya Seed as an Efficient Natural Biosorbent [Elektronische Daten] [Caroline Weber, Edson Foletto, Lucas Meili] Papaya seed was used as biosorbent for removal of tannery dye (Direct Black 38) from aqueous solution. The papaya seed was characterized, and it posseses macro/mesoporous texture, large pore size, and a surface containing various organic functional groups. The initial dye concentration, contact time, and pH significantly influenced the adsorption capacity. Equilibrium data were analyzed by the Langmuir and Freundlich isotherm models. The equilibrium data were best represented by the Langmuir isotherm, with a high adsorption capacity of 440mg g−1. Adsorption kinetic data were fitted using the pseudo-first-order, pseudo-second-order, intraparticle diffusion, and Boyd models. The adsorption kinetics for the dye onto papaya seed was best described by second-order kinetic equation. The adsorption process mechanism was found to be controlled by both external mass transfer and pore diffusion, but the external diffusion was the dominating process. Papaya seeds showed to be a promising material for adsorption of Direct Black 38 dye from aqueous solution. Springer Science+Business Media Dordrecht, 2013 Papaya seed nationallicence Adsorption nationallicence Dye nationallicence Kinetic nationallicence Equilibrium nationallicence Mechanism nationallicence Weber Caroline Department of Chemical Engineering, Federal University of Santa Maria, 97105-900, Santa Maria, Brazil aut Foletto Edson Department of Chemical Engineering, Federal University of Santa Maria, 97105-900, Santa Maria, Brazil aut Meili Lucas Department of Chemical Engineering, Federal University of Santa Maria, 97105-900, Santa Maria, Brazil aut Water, Air, & Soil Pollution Springer Netherlands 224/2(2013-02-01), 1-11 0049-6979 224:2<1 2013 224 11270 https://doi.org/10.1007/s11270-012-1427-7 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11270-012-1427-7 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Weber Caroline Department of Chemical Engineering, Federal University of Santa Maria, 97105-900, Santa Maria, Brazil aut NATIONALLICENCE 700 1- Foletto Edson Department of Chemical Engineering, Federal University of Santa Maria, 97105-900, Santa Maria, Brazil aut NATIONALLICENCE 700 1- Meili Lucas Department of Chemical Engineering, Federal University of Santa Maria, 97105-900, Santa Maria, Brazil aut NATIONALLICENCE 773 0- Water, Air, & Soil Pollution Springer Netherlands 224/2(2013-02-01), 1-11 0049-6979 224:2<1 2013 224 11270 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer