Transformation of 2,4, 6-Trinitrotoluene (TNT) by Immobilized and Resting Cells of Arthrobacter SP.

Topè, Avinash M; Jamil, Kaiser; Baggi, T.R.

doi:10.4148/1090-7025.1013

Cited by 10 publications

(12 citation statements)

References 18 publications

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“…There are fewer reports of 2,4-DNT biodegradation by cultured Arthrobacter sp. (Tope et al 1999) Alcaligenes (Smets and Mueller 2001), and Burkholderia cepacia , and ADNT by P. aeruginosa (Alvarez et al 1995).…”

Section: Biotic -Secondary Producersmentioning

confidence: 99%

Mineralization of 2,4,6-Trinitrotoleune (TNT) in Coastal Waters and Sediments

Walker¹,

Osburn²,

Boyd³

et al. 2006

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Standard Form 298 (Rev. 8-98)Prescribed by ANSI Std. Z39.18Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing this collection of information. Approved for public release; distribution is unlimited. PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES) SPONSOR / MONITOR'S ACRONYM(S) 9. SPONSORING / MONITORING AGENCY NAME(S) AND ADDRESS(ES)11 Unclassified Unclassified UnclassifiedUnlimited 42Michael T. Montgomery 202-404-6419Mineralization rates of 14C-TNT, -DNT, and -DAT were measured in surface sediments, with depth in sediment cores, and in the water column during 12 research cruises over the past 4 years in the San Francisco Bay, Chesapeake Bay, and Hawaii. Mineralization rates were also compared to uptake and incorporation rates of TNT, DNT, and DAT into the natural microbial assemblage. In general, the bacterial mineralizations rates were similar, or an order of magnitude faster, than those for organic hydrocarbons measured at the same time. Using seawater sampled from a historical UXO field, we found that while bacterial mineralization was rapid (>1 ug L-1 d-1, unfiltered water in dark), photodegradation was even faster (16 ug L-1 d-1, filtered water in light) and the combination of light and unfiltered water was greater than the sum of the two rates (103 ug L-1 d-1), suggesting either that the prescnce of active phytoplankton is important or photodegradation enhances bacterial mineralization.

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Section: Biotic -Secondary Producersmentioning

confidence: 99%

Mineralization of 2,4,6-Trinitrotoleune (TNT) in Coastal Waters and Sediments

Walker¹,

Osburn²,

Boyd³

et al. 2006

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“…Immobilization in alginate gel offers the bacterial cells protection against environmental conditions and also the viability can be doubled, compared to free cells of Arthrobacter sp. (Tope et al 1999). The biodegradation ability is (in most cases) not affected (Raja Noor et al 2006), moreover in some cases, the expected activity is enhanced by immobilization (Díaz et al 2002).…”

Section: Decolorization By Entrapment-immobilized Bacteriamentioning

confidence: 95%

“…4c). Alginate immobilization is the most commonly used method for bacterial gel entrapment for many bioremediation applications (Díaz et al 2002;Tope et al 1999;Raja Noor et al 2006;James et al 1985). Immobilization in alginate gel offers the bacterial cells protection against environmental conditions and also the viability can be doubled, compared to free cells of Arthrobacter sp.…”

Section: Decolorization By Entrapment-immobilized Bacteriamentioning

confidence: 97%

Decolorization of an industrial effluent by free and immobilized cells of Stenotrophomonas maltophilia AAP56. Implementation of efficient down flow column reactor

Galai

Limam

Marzouki

2010

World J Microbiol Biotechnol

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A bacterial strain AAP56, isolated from a polluted soil (from Kelibia city) and identified as Stentrophomonas maltophilia, was particularly interesting for its ability to decolorize recalcitrant dyes of an industrial effluent: SITEX Black. The final percentage decolorization 60% was shown by bacterial culture after incubation in LB medium at 30°C under shaking conditions. The decolorization was closely correlated with the metabolic bacterial growth. The replacement of yeast extract in LB medium composition by soya flour was clearly efficient to enhance the percentage decolorization by 20% and also to reduce the growth medium cost 60-fold. The bacteria were able to reduce 23% from the initial COD and 28% from the initial BOD 5 of the effluent. The immobilization of bacterial cells in calcium alginate beads improved by 25% the effectiveness of the biotransformation within 24 h in batch conditions. The potential of a downflow fixed column reactor (DFCR) to decolorize SITEX Black was evaluated under dilution rate. The best decolorization percentage (82%) was recorded at 0.3 h -1 . This bioprocess seems to be a potentially useful method to remediate the colored textile wastewater.

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“…There are fewer reports of 2,4-dinitrotoluene biodegradation by cultured Arthrobacter sp. (Tope et al 1999) Alcaligenes sp. (Smets and Mueller 2001), and Burkholderia cepacia , and 2-amino-4,6-dinitrotoluene by P. aeruginosa (Alvarez et al 1995).…”

Section: Biotic -Heterotrophic Bacteriamentioning

confidence: 99%

Union Support Recovery in High-Dimensional Multivariate Regression

Obozinski

Wainwright

Jordan

2008

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Standard Form 298 (Rev. 8-98)Prescribed by ANSI Std. Z39.18Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing this collection of information. Once released in the environment, either through detonation, casing breakage, or by slow leaks from unexploded ordnance (UXO), nitrogenous energetic compounds (NEC, such as TNT, HMX, RDX) may sorb onto particulates, partition to dissolved organic matter, or remain dissolved in aqueous media. Our hypothesis was that NEC would be transient in coastal ecosystems. This was based primarily on the understanding that microbial growth in these systems is typically nitrogen-limited and there are few examples of nitrogen based organic compounds that are not rapidly metabolized in these environments. During 14 sampling events in coastal waterways from 2002 to 2007, we measured TNT mineralization rates in surface sediment and water samples that were often the same as, or within one order of magnitude of, the rate of total heterotrophic bacterial metabolism. These rates were often similar to those of other organic compounds that are transient in natural ecosystems due to their use in bacterial metabolism, such as petroleum hydrocarbons and amino acids. PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES) SPONSOR / MONITOR'S ACRONYM(S) 9. SPONSORING / MONITORING AGENCY NAME(S) AND ADDRESS(ES) SPONSOR / MONITOR'S REPORT NUMBER(S)

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Transformation of 2,4, 6-Trinitrotoluene (TNT) by Immobilized and Resting Cells of Arthrobacter SP.

Cited by 10 publications

References 18 publications

Mineralization of 2,4,6-Trinitrotoleune (TNT) in Coastal Waters and Sediments

Mineralization of 2,4,6-Trinitrotoleune (TNT) in Coastal Waters and Sediments

Decolorization of an industrial effluent by free and immobilized cells of Stenotrophomonas maltophilia AAP56. Implementation of efficient down flow column reactor

Union Support Recovery in High-Dimensional Multivariate Regression

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