TY - JOUR

T1 - Importance of the Hydration Degree in the Use of Clay-Fungal Biocomposites as Adsorbents for Uranium Uptake

AU - Olivelli, Melisa S.

AU - Schampera, Birgit

AU - Woche, Susanne K.

AU - Torres Sánchez, Rosa M.

AU - Curutchet, Gustavo A.

N1 - Funding information: The authors acknowledge the Ministerio de Ciencia y Técnica, Agencia Nacional de Promoción Científica y Tecnológica, MINCyT-ANPCyT-FONARSEC through FS-Nano 008, CONICET PIO 2013, and Deutsche Forschungsgemeinschaft (German Research Foundation), SCHA 1732/1-1, for financial support. G.A.C. and R.M.T.S. are members of CONICET, and M.S.O. acknowledges a CONICET fellowship and a DAAD grant.

PY - 2017/3/15

Y1 - 2017/3/15

N2 - The development of new adsorbent materials is a key factor for applying sorption-based technologies designed to clean effluents. Clay biomass complexes (BMMT) from fungal biomass grown on a raw montmorillonite (MMT) were generated in a previous work and used in a wet state. These samples were examined previously as a material to retain metals and improve separation after adsorption processes. The objective of this study was to characterize the uranium(VI) adsorption of previously dried BMMT, to determine differences from wet BMMT samples, and to understand some of the processes responsible for those differences. The differences between dried and wet BMMT adsorption capacities were verified. Proton exchange of dried BMMT samples was analyzed. Furthermore, X-ray diffraction and ζ-potential measurements of the samples after uranium(VI) uptake were performed. The hydration degree during the adsorption contact time was evaluated. Contact-angle measurement and diffusion experiments by Fourier transform infrared spectroscopy were also conducted. Dried BMMT samples presented a higher uranium(VI) uptake capacity than wet BMMT samples. Biomass played an important role in the behavior of samples evaluated, and the results indicated the importance to specify the hydration degree of adsorbents. (Figure Presented).

AB - The development of new adsorbent materials is a key factor for applying sorption-based technologies designed to clean effluents. Clay biomass complexes (BMMT) from fungal biomass grown on a raw montmorillonite (MMT) were generated in a previous work and used in a wet state. These samples were examined previously as a material to retain metals and improve separation after adsorption processes. The objective of this study was to characterize the uranium(VI) adsorption of previously dried BMMT, to determine differences from wet BMMT samples, and to understand some of the processes responsible for those differences. The differences between dried and wet BMMT adsorption capacities were verified. Proton exchange of dried BMMT samples was analyzed. Furthermore, X-ray diffraction and ζ-potential measurements of the samples after uranium(VI) uptake were performed. The hydration degree during the adsorption contact time was evaluated. Contact-angle measurement and diffusion experiments by Fourier transform infrared spectroscopy were also conducted. Dried BMMT samples presented a higher uranium(VI) uptake capacity than wet BMMT samples. Biomass played an important role in the behavior of samples evaluated, and the results indicated the importance to specify the hydration degree of adsorbents. (Figure Presented).

UR - http://www.scopus.com/inward/record.url?scp=85018515617&partnerID=8YFLogxK

U2 - 10.1021/acs.iecr.6b04881

DO - 10.1021/acs.iecr.6b04881

M3 - Article

AN - SCOPUS:85018515617

VL - 56

SP - 2824

EP - 2833

JO - Industrial and Engineering Chemistry Research

JF - Industrial and Engineering Chemistry Research

SN - 0888-5885

IS - 10

ER -