Salt marsh rhizosphere affects microbial biotransformation of the widespread halogenated contaminant tetrabromobisphenol-A (TBBPA)

One-step process for debromination and aerobic mineralization of tetrabromobisphenol-A by a novel Ochrobactrum sp. T isolated from an e-waste recycling site

“…With prolonging degradation time, one benzene ring of BPA is further cleaved to produce intermediate (H); this oxidation is also achieved by aerobic degradation of BPA (Lobos et al, 1992) and another two-step process of TBBPA biodegradation by sequential anaerobic-aerobic strains (Ronen and Abeliovich, 2000). Compared with the degradation pathways of TBBPA by manganese dioxide (Lin et al, 2009), photochemical transformation (Eriksson et al, 2004) and other biodegradation ways, we obtained a series of complete debromination cleavage products in this study rather than the brominated phenols reported in previous works (Eriksson et al, 2004;Lin et al, 2009;Ravit et al, 2005;Uhnáková et al, 2009). Note that this one-step decontamination mechanism address the limitation of two-step processes by combining the first step of reductive debromination by an anaerobic system (Ronen and Abeliovich, 2000) and the second step of degradation and mineralization by an aerobic system (Voordeckers et al, 2002).…”

Fate and metabolism of tetrabromobisphenol A in soil slurries without and with the amendment with the alkylphenol degrading bacterium Sphingomonas sp. strain TTNP3

“…Microorganisms can evolve different strategies to oxidize or reduce halogenated organic compounds by using them as electron donors or electron acceptors (L€ offler et al, 2003;van P ee and Unversucht, 2003). TBBPA can be reductively debrominated stepwise to BPA under anoxic conditions (Arbeli and Ronen, 2003;Liu et al, 2013;Ravit et al, 2005;Ronen and Abeliovich, 2000;Voordeckers et al, 2002) but even under oxic conditions . Tribromobisphenol A (triBBPA) (Compound 11) was the only detected debromination product of TBBPA in our study.…”

“…However, biotransformation is the main way of TBBPA elimination in the environment and microorganisms are the major actors of such attenuation process (H€ aggblom and Bossert, 2003). Former biodegradation studies have shown that TBBPA can be partially debrominated in soils, sediments, and water under anoxic conditions (Brenner et al, 2006;Hakk and Letcher, 2003;Liu et al, 2013;Nyholm et al, 2010;Ravit et al, 2005). Several studies have reported reductive debromination of TBBPA to bisphenol A (BPA) by the microbial communities of anoxic soil, stream and estuarine sediments, and sewage sludge (Arbeli et al, 2006;Gerecke et al, 2006;Liu et al, 2013;Ronen and Abeliovich, 2000;Voordeckers et al, 2002).…”

Phytoremediation as a management option for contaminated sediments in tidal marshes, flood control areas and dredged sediment landfill sites

“…Spartina sediments were found to dehalogenate TBBPA more rapidly than the Phragmites or unvegetated sediments, resulting in greater production of the intermediate bisphenol A. Differences in microbial PLFA diversity were not seen in contaminated sediments associated with either the different plant species or unvegetated sediment, but were higher in the uncontaminated sediments (Ravit et al 2005).…”

“…Bioaugmentation effect was doubled in the presence of natural substrates such as tangerine peel extract and limonene, indicating effectiveness of these substrates in biostimulation. Ravit et al (2005) compared the effect of S. alterniflora and Phragmites australis on sediment microbial communities responsible for the biotransformation of the halogenated flame retardant tetrabromobisphenol A (TBBPA). Spartina sediments were found to dehalogenate TBBPA more rapidly than the Phragmites or unvegetated sediments, resulting in greater production of the intermediate bisphenol A.…”