Acceleration of tributyltin biodegradation by sediment microorganisms under optimized environmental conditions

Sakultantimetha, Arthit; Keenan, Helen; Beattie, Tara K.; Aspray, Thomas J.; Bangkedphol, S.; Songsasen, Apisit

doi:10.1016/j.ibiod.2010.05.007

Cited by 21 publications

(10 citation statements)

References 24 publications

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“…The degradation efficiency was comparable or higher than Enterobacter cloacae which shows t 1/2 ranging from 8.54 to 3.16 days (Sakultantimetha et al 2011). In order to achieve better degradation efficiency, it is necessary to optimize parameters such as temperature, pH, concentration of TBT and salinity (Sakultantimetha et al 2010).…”

Section: Resultsmentioning

confidence: 99%

Biodegradation of Tributyltin (TBT) by Extremophile Bacteria from Atacama Desert and Speciation of Tin By-products

Yáñez

Riffo

Santander

et al. 2015

Bull Environ Contam Toxicol

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Biodegradation of tributyltin (TBT) by four tin resistant Gram negative bacteria isolated from extremely contaminated river sediments in the Atacama Desert in Chile was studied. Moraxella osloensis showed the greatest resistance and degradation capability of TBT, producing less toxic by-products, such as dibutyltin (DBT) and inorganic tin. In 7 days, approximately 80 % of TBT degradation was achieved, generating close to 20 % of DBT as degradation product. The degradation rate constant (k) was 0.022 [day(-1)] and TBT half-life (t1/2) in culture was 4.3 days. Debutylation is stated a probable mechanism of TBT degradation.

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Section: Resultsmentioning

confidence: 99%

Biodegradation of Tributyltin (TBT) by Extremophile Bacteria from Atacama Desert and Speciation of Tin By-products

Yáñez

Riffo

Santander

et al. 2015

Bull Environ Contam Toxicol

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“…However, a direct comparison of microcosm experiments cannot be made due to several reasons such as, TBT absorption varies depending on sediment characteristics such as the granulometry, amount of organic matter [ 3 ] and the microcosms experimental design (container wall, environmental conditions, days of exposure, sediment analysis). It is also important to mention bioavailability can reduce biodegradation performance of microbes in aged contamination [ 38 ]. Nevertheless, these studies and other suggests that bioremediation is effective for TBT contaminated sediment.…”

Section: Resultsmentioning

confidence: 99%

“…From Figure 3 it can be seen that DBT was the primary degradation product at concentration between 3.45–28.6 ng/g wet wt and on days 90 to 120 and MBT was detectable at concentrations between 2 and 23 ng/g wet wt, concluding therefore that TBT was degraded in a stepwise manner. Thus, the microcosm investigation and additional studies indicated that microbes C3, C6, C7, C18, C21 and C22 can degrade TBT, by a dealkylation mechanism [ 24 , 26 , 27 , 38 ], to less toxic species by a sequential loss of an alkyl group by the following method: TBT (C 12 H 27 Sn + ) > DBT (C 8 H 18 Sn 2+ ) > MBT (C 4 H 9 Sn 3+ ) over time ( Figure 4 ). Statistical analysis shows that there is a significant difference ( p < 0.05) between the degradation of TBT in each microcosm and that higher TBT degradation occurred in microcosms inoculated with isolates C7 and C22 ( Figure 3 ) with an initial rate of 1.26, and 1.493 ng/g/day respectively.…”

Section: Resultsmentioning

confidence: 99%

“…Another possible solution may be the addition of nutrients through an organic substrate (compost, straw) or electron acceptors (i.e. , nitrogen, oxygen, carbon and phosphorus) to further accelerate the degradation of TBT [ 38 , 39 ], and to provide protection to microbial cells from TBT stress as they can utilize other carbon sources [ 28 ].…”

Section: Resultsmentioning

confidence: 99%

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Microbes a Tool for the Remediation of Organotin Pollution Determined by Static Headspace Gas Chromatography-Mass Spectrometry

et al. 2018

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Tributyltin (TBT) is one of the most toxic anthropogenic compounds introduced into the marine environment. Despite its global ban in 2008, TBT is still a problem of great concern due to its high affinity for particulate matter, providing a direct and potentially persistent route of entry into benthic sediments. Bioremediation strategies may constitute an alternative approach to conventional physicochemical methods, benefiting from the microorganism’s potential to metabolize anthropogenic compounds. In this work, a simple, precise and accurate static headspace gas chromatography method was developed to investigate the ability of TBT degrading microbes in sedimentary microcosms over a period of 120 days. The proposed method was validated for linearity, repeatability, accuracy, specificity, limit of detection and limit of quantification. The method was subsequently successfully applied for the detection and quantification of TBT and degradation compounds in sediment samples on day 0, 30, 60, 90 and 120 of the experiment employing the principles of green chemistry. On day 120 the concentration of TBT remaining in the microcosms ranged between 91.91 ng/g wet wt for the least effective microbial inoculant to 52.73 ng/g wet wt for the most effective microbial inoculant from a starting concentration of 100 ng/g wet wt.

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“…During the past decades, numerous papers regarding TBT degradation in the marine environment have been published. Most of them have been macrocosm [17,18] or microcosm [19,20] experiments or other laboratory setups in which complex environmental conditions could never be completely simulated [21,22]. The studies performed in situ were primarily based on the modelling of TBT concentration reduction with sediment depth [12,23,24,25].…”

Section: Q4mentioning

confidence: 99%

Organotin persistence in contaminated marine sediments and porewaters: In situ degradation study using species-specific stable isotopic tracers

Furdek

Mikac

Bueno

et al. 2016

Journal of Hazardous Materials

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This paper provides a comprehensive study of the persistence of butyltins and phenyltins in contaminated marine sediments and presents the first data on their degradation potentials in porewaters. The study's aim was to explain the different degradation efficiencies of organotin compounds (OTC) in contaminated sediments. The transformation processes of OTC in sediments and porewaters were investigated in a field experiment using species-specific, isotopically enriched organotin tracers. Sediment characteristics (organic carbon content and grain size) were determined to elucidate their influence on the degradation processes. The results of this study strongly suggest that a limiting step in OTC degradation in marine sediments is their desorption into porewaters because their degradation in porewaters occurs notably fast with half-lives of 9.2 days for tributyltin (TBT) in oxic porewaters and 2.9±0.1 and 9.1±0.9 days for dibutyltin (DBT) in oxic and anoxic porewaters, respectively. By controlling the desorption process, organic matter influences the TBT degradation efficiency and consequently defines its persistence in contaminated sediments, which thus increases in sediments rich in organic matter.

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Acceleration of tributyltin biodegradation by sediment microorganisms under optimized environmental conditions

Cited by 21 publications

References 24 publications

Biodegradation of Tributyltin (TBT) by Extremophile Bacteria from Atacama Desert and Speciation of Tin By-products

Biodegradation of Tributyltin (TBT) by Extremophile Bacteria from Atacama Desert and Speciation of Tin By-products

Microbes a Tool for the Remediation of Organotin Pollution Determined by Static Headspace Gas Chromatography-Mass Spectrometry

Organotin persistence in contaminated marine sediments and porewaters: In situ degradation study using species-specific stable isotopic tracers

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