TY - JOUR
T1 - Removal of TBP sorbed on wood by Trametes versicolor through solid-state fermentation
AU - Losantos, Diana
AU - Sarra, Montserrat
AU - Caminal, Glòria
N1 - Copyright © 2024 The Authors. Published by Elsevier B.V. All rights reserved.
PY - 2024/12/5
Y1 - 2024/12/5
N2 - The use of white-rot fungi is a promising approach for removing organophosphate flame retardants (OPFRs) from wastewaters. Immobilization in wood for this purpose ensures the predominance of the fungus but also contributes to OPFRs sorption. This work focused on the ability of T. versicolor to degrade tributyl phosphate (TBP) sorbed in wood. This initially underwent ten sorption cycles, each involving exposure to a 10 mg·L-1 TBP solution. Throughout each cycle, the wood exhibited a sustained sorption capacity (0.035 ± 0.002 mg TBP·g. dry wood-1 per cycle). The wood residues obtained after each sorption cycle were inoculated with T. versicolor. After 60 days of inoculation, fungus degraded over 90 % of TBP in each cycle's wood residue. However, fungal growth was inhibited, resulting in a 43 % decrease in biomass compared to controls. The fact that biomass remained active and capable of degrading TBP suggests that the growth decrease is likely due to the formation of transformation products. An increase in toxicity units (from 13.64 to 87.86 at the end) was associated with the accumulation of 3-hydroxybutyl dihydrogen phosphate (OH-MBP). However, subsequent experiments demonstrated that given sufficient time, the fungus not only degraded OH-MBP but also produced a non-toxic effluent.
AB - The use of white-rot fungi is a promising approach for removing organophosphate flame retardants (OPFRs) from wastewaters. Immobilization in wood for this purpose ensures the predominance of the fungus but also contributes to OPFRs sorption. This work focused on the ability of T. versicolor to degrade tributyl phosphate (TBP) sorbed in wood. This initially underwent ten sorption cycles, each involving exposure to a 10 mg·L-1 TBP solution. Throughout each cycle, the wood exhibited a sustained sorption capacity (0.035 ± 0.002 mg TBP·g. dry wood-1 per cycle). The wood residues obtained after each sorption cycle were inoculated with T. versicolor. After 60 days of inoculation, fungus degraded over 90 % of TBP in each cycle's wood residue. However, fungal growth was inhibited, resulting in a 43 % decrease in biomass compared to controls. The fact that biomass remained active and capable of degrading TBP suggests that the growth decrease is likely due to the formation of transformation products. An increase in toxicity units (from 13.64 to 87.86 at the end) was associated with the accumulation of 3-hydroxybutyl dihydrogen phosphate (OH-MBP). However, subsequent experiments demonstrated that given sufficient time, the fungus not only degraded OH-MBP but also produced a non-toxic effluent.
KW - Bioremediation
KW - Emerging pollutants
KW - Immobilization
KW - Sorption
KW - Toxicity of transformation products
KW - White-rot fungi
UR - http://www.scopus.com/inward/record.url?scp=85206105088&partnerID=8YFLogxK
U2 - 10.1016/j.jhazmat.2024.136066
DO - 10.1016/j.jhazmat.2024.136066
M3 - Article
C2 - 39405698
AN - SCOPUS:85206105088
SN - 0304-3894
VL - 480
JO - Journal of Hazardous Materials
JF - Journal of Hazardous Materials
M1 - 136066
ER -