Effects of activated carbon on reductive dechlorination of PCBs by organohalide respiring bacteria indigenous to sediments

Kjellerup, Birthe V.; Naff, Carina; Edwards, Sarah; Ghosh, Upal; Baker, Joel E.; Sowers, Kevin R.

doi:10.1016/j.watres.2013.12.030

Cited by 45 publications

(44 citation statements)

References 35 publications

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“…Others have also observed this trend in polyhalogenated compounds. For instance, in a study of microbial degradation of Aroclor 1260, Kjellerup et al (2014) noted that the addition of granulated AC resulted in the formation of more extensively de-chlorinated by-products compared to the amendment-free control. Several other studies have demonstrated that TBBPA microbial debromination could be facilitated by the presence of extracellular electron mediators such as vitamin B 12 , riboflavin, 2-hydroxy-1,4-naphthoquinone, humic acid (Chang et al, 2012; Wang et al, 2013), or solid amendments containing a relatively high level of organic carbon such as gray chalk, sediments and soil particles (Arbeli and Ronen, 2003).…”

Section: Resultsmentioning

confidence: 99%

“…However, conversely because of their extraordinary sorption capabilities, there is a concern that organic compounds strongly adsorbed onto BC and AC surfaces will no longer be bioavailable for microbial degradation. Although carbonaceous amendments have been shown to slow down the biodegradation of some herbicides (Muter et al, 2014), and even prevent BDE-47 degradation by a degrading strain of Pseudomonas putida (Xin et al, 2014), most studies have reported an increase in the biodegradability of a wide range of organic pollutants in the presence of BC and AC, including, pentachlorophenol (Tong et al, 2014; Yu et al, 2015), azo dyes (Van Der Zee et al, 2003), phenanthrene (Leglize et al, 2008), 2,6-Dichlorophenol (Agarry et al, 2013), and polychlorinated biphenyls (Kjellerup et al, 2014). These findings suggest that combining both carbonaceous amendment materials and microbial degradation could be a promising strategy to improve the removal of a wide range of contaminants from wastewater and sludge.…”

Section: Introductionmentioning

confidence: 99%

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Biochar and activated carbon act as promising amendments for promoting the microbial debromination of tetrabromobisphenol A

et al. 2018

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The increasing occurrence of tetrabromobisphenol A (TBBPA) in the environment is raising questions about its potential environmental health impacts as it has been shown to cause various deleterious effects in humans. The fact that the highest concentrations of TBBPA have been reported in wastewater sludge is concerning as effluent discharge and biosolids land application are likely a route by which TBBPA can be further disbursed to the environment. Our objectives in this study were to evaluate the effect of biochar (BC) and activated carbon (AC) in promoting the biodegradation of TBBPA, and characterize the response of anaerobic sludge microbial communities following amendments. Both carbonaceous amendments were found to promote the reductive debromination of TBBPA. Nearly complete transformation of TBBPA to BPA was observed in the amended reactors ~20 days earlier than in the control reactors. In particular, the transformation of diBBPA to monoBBPA, which appears to be the rate-limiting step, was accelerated in the presence of either amendment. Overall, microbial taxa responding to the amendments, i.e., ‘sensitive responders’, represented a small proportion of the community (i.e., 7.2%), and responded positively. However, although both amendments had a similar effect on TBBPA degradation, the taxonomic profile of the sensitive responders differed greatly from one amendment to the other. BC had a taxonomically broader and slightly more pronounced effect than AC. This work suggests that BC and AC show great potential to promote the biodegradation of TBBPA in anaerobic sludge, and their integration into wastewater treatment processes may be helpful for removing TBBPA and possibly other emerging hydrophobic contaminants.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Biochar and activated carbon act as promising amendments for promoting the microbial debromination of tetrabromobisphenol A

et al. 2018

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“…The biochar surface could provide a source of high contaminant concentration for the organisms to feed on, and the biofilm would provide a suitable habitat for the bacterial community. Successful results have already been reported using this technology in ACs to enhance PCB dechlorination in impacted sediments (Kjellerup et al, 2014;Payne et al, 2013). However, a recent study of field-aged biochar in agricultural soil has demonstrated minimal natural colonization of the external (and internal) surfaces of wood-derived biochar (Quilliam et al, 2013a).…”

Section: Organic Contaminants Associated With Biocharmentioning

confidence: 99%

Application of Biochar for Soil Remediation

Sizmur

Puga

Moreno‐Jiménez

et al. 2015

SSSA Special Publications

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“…This is highly probable as the highest chlorine concentrations were also found in this layer. However, it cannot be ruled out that the newly formed VOX compounds from the depth zones .2 cm are degraded faster than those in the salt crust, [47][48][49] explaining to some extent the differences between the salt crust and the other sediment depth zones.…”

Section: Discussionmentioning

confidence: 99%

Halogenated hydrocarbon formation in a moderately acidic salt lake in Western Australia – role of abiotic and biotic processes

et al. 2015

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Environmental context. Volatile halogenated organic compounds (VOX) contribute to ozone depletion and global warming. Here we demonstrate that acidic salt lake sediments in Western Australia contribute to the global natural emission of these compounds and that the emissions are primarily of biotic origin. Elucidating major sources and sinks of VOX is a key task in environmental chemistry because their formation and degradation have major effects on atmospheric chemistry and thus earth climate.Abstract. Volatile organohalogen compounds (VOX) are known environmental pollutants and contribute to stratospheric ozone depletion. Natural formation of VOX has been shown for many environments from the deep sea to forest soils and Antarctica. Recently, we showed that VOX are emitted from pH-neutral salt lakes in Western Australia and that they are mainly of biotic origin. To which extent this biotic organohalogen formation in salt lakes is pH-dependent and whether VOX are also formed under acidic conditions are unknown. Therefore, we quantified VOX emissions from an acidic salt lake in Western Australia (Lake Orr) in biotic and abiotic (g ray-irradiated) microcosm experiments under controlled laboratory conditions. The experiments revealed that biotic halogenation processes also occurred under acidic conditions (pH range 3.8-4.8), though the emissions were approximately one order of magnitude lower (nanogram per kilogram dry sediment range) than from pH-neutral lake sediments. Among the detected substances were brominated, e.g. tribromomethane, as well as chlorinated compounds (e.g. trichloromethane). The addition of lactate and acetate, and ferrihydrite showed no stimulation of VOX formation in our microcosms. Hence, the stimulation of Fe-metabolising microorganisms and their potential effect on the formation of reactive Fe species did not promote VOX emissions, suggesting a direct enzymatic formation of the emitted compounds.

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Effects of activated carbon on reductive dechlorination of PCBs by organohalide respiring bacteria indigenous to sediments

Cited by 45 publications

References 35 publications

Biochar and activated carbon act as promising amendments for promoting the microbial debromination of tetrabromobisphenol A

Biochar and activated carbon act as promising amendments for promoting the microbial debromination of tetrabromobisphenol A

Application of Biochar for Soil Remediation

Halogenated hydrocarbon formation in a moderately acidic salt lake in Western Australia – role of abiotic and biotic processes

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