The use of rice and coffee husks for biosorption of U (total), 241Am, and 137Cs in radioactive liquid organic waste

Autor: Rafael Luan Sehn Canevesi, Eduardo Ferreira, Rafael Vicente de Pádua Ferreira, Edson Antonio da Silva, Leandro Goulart de Araujo, Maurício César Palmieri, Julio T. Marumo
Přispěvatelé: University of São Paulo (USP), Institut Jean Lamour (IJL), Université de Lorraine (UL)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Unioeste - Universidade Estadual do Oeste do Paraná
Jazyk: angličtina
Rok vydání: 2020
Předmět:
Zdroj: Environmental Science and Pollution Research
Environmental Science and Pollution Research, Springer Verlag, 2020, 27 (29), pp.36651-36663. ⟨10.1007/s11356-020-09727-8⟩
ISSN: 0944-1344
1614-7499
DOI: 10.1007/s11356-020-09727-8⟩
Popis: International audience; Rice and coffee husks (raw and chemically activated) are examined as potential biosorption materials regarding their capacity to remove U (total), 241Am, and 137Cs. The physical parameters evaluated were the morphological characteristics of the biomass, real and apparent density, and surface area. Contact times for the batch experiments were 0.5, 1, 2, and 4 h, and the concentrations tested ranged between 10% of the total concentration and the radioactive waste itself without any dilution. The results were evaluated by experimental sorption capacity, ternary isotherm, and kinetics models. The kinetics results showed that equilibrium was reached after 2 h for all biomass. Raw coffee husk showed the best adsorption results in terms of maximum capacity (qmax) for all three radionuclides, which were 1.96, 39.4 × 10−6, and 46.6 × 10−9 mg g−1 for U, Am, and Cs, respectively. The biosorption process for the raw and activated rice husks was best represented by the Langmuir ternary isotherm model with two sites. For the coffee husk, in the raw and activated states, the biosorption process was best described by the modified Jain and Snoeyink ternary model. These results suggest that biosorption with these biomaterials can be applied in the treatment of liquid organic radioactive waste containing mainly uranium and americium.
Databáze: OpenAIRE
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