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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Agricultural solid waste for sorption of metal ions: part Icharacterization and use of lettuce roots and sugarcane bagasse for Cu(II), Fe(II), Zn(II), and Mn(II) sorption from aqueous medium

Texto completo
Autor(es):
Milani, Priscila Aparecida [1] ; Debs, Karina Bugan [2] ; Labuto, Georgia [3] ; Vasconcelos Martins Carrilho, Elma Neide [4, 1]
Número total de Autores: 4
Afiliação do(s) autor(es):
[1] Univ Fed Sao Carlos, Lab Mat Polimer & Biossorventes, BR-13600970 Araras, SP - Brazil
[2] Univ Fed Sao Paulo, Grp Anal Quim Aplicadas, BR-09913030 Diadema, SP - Brazil
[3] Univ Fed Sao Paulo, Dept Quim, BR-09913030 Diadema, SP - Brazil
[4] Univ Fed Sao Carlos, Dept Ciencias Nat Matemat & Educ, BR-13600970 Araras, SP - Brazil
Número total de Afiliações: 4
Tipo de documento: Artigo Científico
Fonte: Environmental Science and Pollution Research; v. 25, n. 36, SI, p. 35895-35905, DEC 2018.
Citações Web of Science: 4
Resumo

Sugarcane bagasse and hydroponic lettuce roots were used as biosorbents for Cu(II), Fe(II), Zn(II), and Mn(II) removal from monoelemental solutions in aqueous medium, at pH5.5, using batch procedures. These biomasses were studied in natura (lettuce roots, NLR, and sugarcane bagasse, NSB) and modified with HNO3 (lettuce roots, MLR, and sugarcane bagasse, MSB). Langmuir, Freundlich, and Dubinin-Radushkevich non-linear isotherm models were used to evaluate the data from the metal ion adsorption assessment. The maximum adsorption capacities (q(max)) in monoelemental solution, calculated using the Langmuir isothermal model for Cu(II), Fe(II), Zn(II), and Mn(II), were respectively 24.61, 2.64, 23.04, and 5.92mg/g for NLR; 2.29, 16.89, 1.97, and 2.88mg/g for MLR; 0.81, 0.06, 0.83, and 0.46mg/g for NSB; and 1.35, 2.89, 20.76, and 1.56mg/g for MSB. The Freundlich n parameter indicated that the adsorption process was favorable for Cu(II) uptake by NLR; Fe(II) retention by MLR and MSB; and Zn(II) sorption by NSB, MLR, and NSB and favorable for all biomasses in the accumulation of Mn(II). The Dubinin-Radushkevich isotherm was applied to estimate the energy (E) and type of adsorption process involved, which was found to be a physical one between analytes and adsorbents. Organic groups such as O-H, C-O-C, CH, and C=O were found in the characterization of the biomass by FTIR. In the determination of the biomass surface charges by using blue methylene and red amaranth dyes, there was a predominance of negative charges. (AU)

Processo FAPESP: 16/06271-4 - Desenvolvimento de materiais adsorventes a partir de resíduo de biomassa de levedura proveniente de processos fermentativos industriais para remoção de contaminantes emergentes de águas e efluentes
Beneficiário:Geórgia Christina Labuto Araújo
Linha de fomento: Auxílio à Pesquisa - Regular