TY - JOUR
T1 - Mechanisms of interaction of chromium with aspergillus niger var tubingensis strain Ed8
AU - Tomasini, A.
AU - Coreno-Alonso, A.
AU - Solé, A.
AU - Diestra, E.
AU - Esteve, I.
AU - Gutiérrez-Corona, J. F.
AU - Reyna Lopez, G. E.
PY - 2014/1/1
Y1 - 2014/1/1
N2 - Experiments were conducted to determine the mechanisms of interaction with chromium of Aspergillus niger var tubingensis strain Ed8 in batch culture and in bioreactor experiments. Results obtained in this work showed that the interaction of A. niger var tubingensis Ed8 with Cr(VI) is based mainly in a reduction process and also, secondly, in a sorption process. Using electron microscopy techniques the ultrathin sections obtained from the mycelium biomass produced by the fungus in batch cultures showed the ability to incorporate Cr intracellulary, into low electron-dense inclusions, but not extracellularly. On the other hand, cultures without Cr(VI) of A. niger var tubingensis Ed8, grown in a bubble column bioreactor, reduced Cr(VI) immediately after repeated addition of this oxyanion; after six loads, 460mg Cr(VI) was reduced to Cr(III) in 60h, corresponding to a reduction rate of 2.62mg Cr(VI)g-1 dry biomass h-1. © 2014 Elsevier Ltd.
AB - Experiments were conducted to determine the mechanisms of interaction with chromium of Aspergillus niger var tubingensis strain Ed8 in batch culture and in bioreactor experiments. Results obtained in this work showed that the interaction of A. niger var tubingensis Ed8 with Cr(VI) is based mainly in a reduction process and also, secondly, in a sorption process. Using electron microscopy techniques the ultrathin sections obtained from the mycelium biomass produced by the fungus in batch cultures showed the ability to incorporate Cr intracellulary, into low electron-dense inclusions, but not extracellularly. On the other hand, cultures without Cr(VI) of A. niger var tubingensis Ed8, grown in a bubble column bioreactor, reduced Cr(VI) immediately after repeated addition of this oxyanion; after six loads, 460mg Cr(VI) was reduced to Cr(III) in 60h, corresponding to a reduction rate of 2.62mg Cr(VI)g-1 dry biomass h-1. © 2014 Elsevier Ltd.
KW - A. niger var tubingensis
KW - Bubble column bioreactor
KW - Cr accumulation
KW - Cr(VI) reduction
U2 - https://doi.org/10.1016/j.biortech.2014.02.036
DO - https://doi.org/10.1016/j.biortech.2014.02.036
M3 - Article
VL - 158
SP - 188
EP - 192
JO - Bioresource Technology
JF - Bioresource Technology
SN - 0960-8524
ER -