Ramos, Stela Nhandeyara do CarmoXavier, Amália Luísa PedrosaTeodoro, Filipe SimõesElias, Megg Madonyk CotaGonçalves, Fernanda JorgeGil, Laurent FrédéricFreitas, Rossimiriam Pereira deGurgel, Leandro Vinícius Alves2015-12-152015-12-152015RAMOS, S. N. do C. et al. Modeling mono- and multi-component adsorption of cobalt(II), copper(II), and nickel(II) metal ions from aqueous solution onto a new carboxylated sugarcane bagasse. Part I: Batch adsorption study. Industrial Crops and Products, v. 74, p. 357-371, 2015. Disponível em: <http://www.sciencedirect.com/science/article/pii/S0926669015301011>. Acesso em: 15 out. 2015.0926-6690http://www.repositorio.ufop.br/handle/123456789/5979A new carboxylated-functionalized sugarcane bagasse (STA) was prepared through the esterification of sugarcane bagasse with trimellitic anhydride. The optimized synthesis conditions yield STA with a percent weight gain of 73.9% and the number of carboxylic acid groups accounted for 3.78 mmol/g. STA was characterized by FTIR, elemental analysis, TGA, PZC, and SEM. Adsorption kinetics followed a pseudosecond- order model. The adsorption rate constant showed the following order: k2,Ni 2+ > k2,Cu 2+ > k2,Co 2+. Four mono- and multi-component isotherm models were used to model the adsorption systems. Monocomponent experimental data were fitted to Langmuir and Sips models; whereas, multicomponent data were fitted to modified extended Langmuir and P-factor models. The maximum adsorption capacities (Qmax,mono) obtained from the Langmuir model were 1.140, 1.197, and 1.563 mmol/g for Co2+, Cu2+, and Ni2+, respectively. The competitive studies demonstrated that the multicomponent adsorption capacity (Qmax,multi) was smaller than Qmax,mono, as a result of the interaction between the metal ions. Desorption studies showed that all metal ions could be fully desorbed from STA.pt-BRSugarcane bagasseTrimellitic anhydrideArtigo publicado em periodicoO periódico Industrial Crops and Products concede permissão para depósito deste artigo no Repositório Institucional da UFOP. Número da licença: 3734740462321.https://doi.org/10.1016/j.indcrop.2015.05.022