Biodegradation of tributyl phosphate, an organosphate triester, by aerobic granular biofilms

Nancharaiah, Y.V.; Reddy, G. Kiran Kumar; Mohan, T.V. Krishna; Venugopalan, V.P.

doi:10.1016/j.jhazmat.2014.09.065

Cited by 47 publications

(5 citation statements)

References 27 publications

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“…TnBP was also partially removed by this culture, although at lower extents of 75% for lowstarting concentrations and 41.6% for high-starting concentrations. The importance of the enrichment step for microbial remotion of these contaminants was highlighted, as culture without enrichment displayed a comparably decreased performance (Nancharaiah et al, 2015;Hou et al, 2021). On the other hand, a complete mineralization of TnBP by an enriched consortium from aerobic granular biomass has been reported.…”

Section: Fungal Selection For Opfr Removalmentioning

confidence: 99%

OPFR removal by white rot fungi: screening of removers and approach to the removal mechanism

Losantos,

Sarra,

Caminal

2024

Front. Fungal Biol.

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The persistent presence of organophosphate flame retardants (OPFRs) in wastewater (WW) effluents raises significant environmental and health concerns, highlighting the limitations of conventional treatments for their remotion. Fungi, especially white rot fungi (WRF), offer a promising alternative for OPFR removal. This study sought to identify fungal candidates (from a selection of four WRF and two Ascomycota fungi) capable of effectively removing five frequently detected OPFRs in WW: tributyl phosphate (TnBP), tributoxy ethyl phosphate (TBEP), trichloroethyl phosphate (TCEP), trichloro propyl phosphate (TCPP) and triethyl phosphate (TEP). The objective was to develop a co-culture approach for WW treatment, while also addressing the utilization of less assimilable carbon sources present in WW. Research was conducted on carbon source uptake and OPFR removal by all fungal candidates, while the top degraders were analyzed for biomass sorption contribution. Additionally, the enzymatic systems involved in OPFR degradation were identified, along with toxicity of samples after fungal contact. Acetate (1.4 g·L-1), simulating less assimilable organic matter in the carbon source uptake study, was eliminated by all tested fungi in 4 days. However, during the initial screening where the removal of four OPFRs (excluding TCPP) was tested, WRF outperformed Ascomycota fungi. Ganoderma lucidum and Trametes versicolor removed over 90% of TnBP and TBEP within 4 days, with Pleorotus ostreatus and Pycnoporus sanguineus also displaying effective removal. TCEP removal was challenging, with only G. lucidum achieving partial removal (47%). A subsequent screening with selected WRF and the addition of TCPP revealed TCPP’s greater susceptibility to degradation compared to TCEP, with T. versicolor exhibiting the highest removal efficiency (77%). This observation, plus the poor degradation of TEP by all fungal candidates suggests that polarity of an OPFR inversely correlates with its susceptibility to fungal degradation. Sorption studies confirmed the ability of top-performing fungi of each selected OPFR to predominantly degrade them. Enzymatic system tests identified the CYP450 intracellular system responsible for OPFR degradation, so reactions of hydroxylation, dealkylation and dehalogenation are possibly involved in the degradation pathway. Finally, toxicity tests revealed transformation products obtained by fungal degradation to be more toxic than the parent compounds, emphasizing the need to identify them and their toxicity contributions. Overall, this study provides valuable insights into OPFR degradation by WRF, with implications for future WW treatment using mixed consortia, emphasizing the importance of reducing generated toxicity.

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Section: Fungal Selection For Opfr Removalmentioning

confidence: 99%

OPFR removal by white rot fungi: screening of removers and approach to the removal mechanism

Losantos,

Sarra,

Caminal

2024

Front. Fungal Biol.

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“…As mentioned in the introduction, the degradation/ stability of TBP has already been studied under various treatments. The mechanism identified using alpha or gamma radiolysis by [17][18][19], with DBP and MBP as stable intermediates, has subsequently been observed under hydrolysis [20,21], thermal decomposition [22,23] and biodegradation [5,24]. Three butyl chains are detached one after the other, as shown in Figure 4 [8].…”

Section: Degradation Mechanism Of Tbp During Uv/ H 2 O 2 Treatmentmentioning

confidence: 99%

Degradation mechanism of tributyl phosphate by UV/H₂O₂ treatment and parameters optimization towards the design of a pilot reactor

D’halluin

Lepeytre

Leydier

et al. 2020

Environmental Technology

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While activated sludge treatment is currently the preferred process for the removal of tributyl phosphate (TBP) at the mg.L −1 level, it is well known that this recalcitrant molecule is incompletely degraded, stimulating research into alternative approaches, such as advanced oxidation. The aim of this study was to characterize the degradation mechanism of TBP during ultraviolet/H 2 O 2 treatment using 31 P NMR, ionic chromatography and total organic carbon analysis. The effects of initial pH, amount of oxidant and pollutant concentration were also assessed using an experimental design approach. The results of this parametric study show that ultraviolet/H 2 O 2 photo-oxidation efficiently degrades TBP at concentrations up to 600 mg.L −1 , with >90% phosphate release and up to 95% removal of total organic carbon within 1 h. The data also show that the main reaction intermediates are short carboxylic acids, resulting from the released alkyl groups, meaning that an interesting application of this process may be to rapidly pre-treat industrial effluent upstream of activated sludge reactors.

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“…These remnants are detected in various environments and aquatic organisms. [9] Herein, we show the separation of Tris (2-chloroethyl) phosphate (TCEP) [10] and tri-n-butyl phosphate (TnBP), [11] the most commonly used OPFRs from water by using a metamaterial that is formed from 12,12',12'',12'''-(pyrene-4,5,9,10-tetrayltetrakis(oxy))tetrakis(dodecan-1-ol)(PTOH) with increased thermal stability than previous report. [7] 4,5,9,10-tetrakis (tetradecyloxy)pyrene(TTP) proposed in the previous study forms porous crystals through π-π and Van der Waals interactions, whereas PTOH uses π-π interactions and hydrogen bonds to form porous crystals.…”

Section: Introductionmentioning

confidence: 99%

Meta‐separation: Improvement of Properties by Molecular Design of Metamaterials for Organophosphorous Flame Retardants

2021

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The separation of liquid mixture has been studied for a long time. Separation proceeds based on the difference in physical properties including pore size and electrostatic interaction. Therefore, there are many difficulties in separation of materials having similar size and/or polarities in physical properties. Recently, meta-separation which is novel separation strategy employing a metamaterial was reported. It utilizes the structural properties of metamaterials rather than electrostatic characteristics to separate water-organic mixtures. Although it proposes a new method for separation of aqueous liquid mixtures, it has a low phase transition temperature and melting point. A newly designed and synthesized 12,12',12'',12'''-(pyrene-4,5,9,10-tetrayltetrakis(oxy))tetrakis(dodecan-1-ol)(P-TOH) can significantly increase the thermal stability by replacing the end of the building block with a hydroxyl group. This dramatically improves the stability of the metamaterial in the xy plane through hydrogen bonding interaction, thereby increasing the phase transition temperature by 23.49°C. Furthermore, organophosphorous flame retardants (OPFRs), critical hazardous organic compounds, are entirely eliminated from the water mixture by molecular metamaterial with PTOH.

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Biodegradation of tributyl phosphate, an organosphate triester, by aerobic granular biofilms

Cited by 47 publications

References 27 publications

OPFR removal by white rot fungi: screening of removers and approach to the removal mechanism

OPFR removal by white rot fungi: screening of removers and approach to the removal mechanism

Degradation mechanism of tributyl phosphate by UV/H₂O₂ treatment and parameters optimization towards the design of a pilot reactor

Meta‐separation: Improvement of Properties by Molecular Design of Metamaterials for Organophosphorous Flame Retardants

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Biodegradation of tributyl phosphate, an organosphate triester, by aerobic granular biofilms

Cited by 47 publications

References 27 publications

OPFR removal by white rot fungi: screening of removers and approach to the removal mechanism

OPFR removal by white rot fungi: screening of removers and approach to the removal mechanism

Degradation mechanism of tributyl phosphate by UV/H2O2 treatment and parameters optimization towards the design of a pilot reactor

Meta‐separation: Improvement of Properties by Molecular Design of Metamaterials for Organophosphorous Flame Retardants

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Degradation mechanism of tributyl phosphate by UV/H₂O₂ treatment and parameters optimization towards the design of a pilot reactor