Bioremediation of Hazardous Organics

Becker, Jennifer G.; Seagren, Eric A.

doi:10.1002/9780470495117.ch8

Cited by 11 publications

(6 citation statements)

References 83 publications

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“…On the contrary, Gordonia sp. H19 seems to remove PAH by a metabolic process, because its growth was higher in the presence of phenanthrene and pyrene, suggesting that these substrates can be used as carbon and energy source for bacterial biomass production (Becker and Seagren, 2010).…”

Section: Bacterial Growthmentioning

confidence: 99%

PAH removal by simultaneous and sequential inoculation of Pseudomonas monteilii P26 and Gordonia sp. H19 in the presence of biostimulants

Tomás

Carrasco

Lobo

et al. 2019

International Biodeterioration & Biodegradation

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Biostimulation and bioaugmentation have been proposed as sustainable alternatives to physicochemical treatments for the environmental decontamination of polycyclic aromatic hydrocarbons (PAH). PAH-removing Pseudomonas monteilii P26 and Gordonia sp. H19, alone or combined with organic and inorganic biostimulants, were previously proposed as candidates to be included in biotechnological products to be used in eco-friendly decontamination processes. This work aims to study the effect of biostimulants on the growth, cell hydrophobicity and emulsifying activity of P. monteilii P26 and Gordonia sp. H19, and to evaluate the influence of selected biostimulants and bacterial inoculation procedure on PAH bioremoval. A complete factorial experimental design was applied to determine the effect of KNO 3 , K 2 HPO 4 , corn steep liquor (CSL) and a PAH mixture on the growth, cell hydrophobicity and bioemulsifying activity of bacterial cultures. The kinetics of PAH bioremoval was evaluated in simultaneous and sequential cultures of P. monteilii P26 and Gordonia sp. H19 in the presence of selected biostimulants. CSL was the only nutrient that exerted positive effects on all responses evaluated, although these effects were not significant in all cases. In mixed cultures, maximum bioremoval of phenanthrene and pyrene was evidenced when the bacterial strains were simultaneously inoculated, independently of the presence or absence of CSL. These results support the biotechnological characterization of two PAH-removing autochthonous Patagonian strains.

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Section: Bacterial Growthmentioning

confidence: 99%

PAH removal by simultaneous and sequential inoculation of Pseudomonas monteilii P26 and Gordonia sp. H19 in the presence of biostimulants

Tomás

Carrasco

Lobo

et al. 2019

International Biodeterioration & Biodegradation

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“…Fe(III) is often an abundant electron acceptor for microbial respiration in subsurface environments and aquatic sediments (Lovley 2000). Dissimilatory Fe(III)-reduction bacteria (DIRB) constituted an important metabolic group involved in environmental processes such as natural degradation of organic matter or bioremediation of organic contaminants (Becker and Seagren 2009). DIRB influenced not only the distribution of iron in the environment but also the fate of other metals, such as Mn(IV), Cr(VI), Se(V), U(VI), and Tc(VII), when their reduction was coupled to the oxidation of organic matter (Han and Gu 2009).…”

Section: Introductionmentioning

confidence: 99%

Isolation and Characterization ofPseudomonas stutzeriCapable of Reducing Fe(III) and Nitrate from Skarn-type Copper Mine Tailings

Wang

Chen²,

Yue

et al. 2014

Geomicrobiology Journal

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Nitrate and Fe(III) are two terminal electron acceptors in anaerobic respiration by microorganisms growing in the anoxic soil or sediment environment. In the current paper a facultative anaerobic dissimilatory Fe(III)-and nitrate-reducing bacterium was isolated from the Linchong tailings, a skarn-type copper mine tailings, located in Anhui. Skarn often formed at the contact zone between intrusions of granitic magma bodies into contact with carbonate sedimentary rocks. This made the tailings possessed strong acid neutralizing capacity and pH of the pore water was 6.8-8.6. The isolate, which was designated strain CW (CCTCC AB 2013114), was a gram-negative rod bacterium and belonged to the gamma subgroup p of the proteobacteria, closely (99.0%) related to Pseudomonas stutzeri. In defined medium, strain CW was shown to grow anaerobically with the acetate using the ferric iron or nitrate as the electron acceptors. Results also showed that strain CW could not grow in the presence of ferrous iron and nitrite.

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“…The popularity of bioremediation is increasing because it often consumes less energy and fewer resources and thus is less expensive and more sustainable than physicochemical treatment approaches (Becker and Seagren, 2010).…”

Section: Introductionmentioning

confidence: 99%

Comparison of different models of substrate inhibition in aerobic batch biodegradation of malathion

Tazdaït¹,

Abdi²,

Grib³

et al. 2013

Turkish J Eng Env Sci

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Abstract:In this study, the biodegradation of malathion by a culture of acclimated indigenous activated sludge was investigated under aerobic conditions. Specific substrate consumption rates ( rs) of the culture under different initial malathion concentrations of from 5 mg/L to 140 mg/L were calculated. The results showed the potential for using local activated sludge for malathion biodegradation. However, malathion exhibited inhibition of substrate degradation rate at 140 mg/L. Various substrate inhibition models were compared by fitting them to the experimental data using Statistica 7.0 software. Experimentally it was observed that the kinetic biodegradation of malathion was best described by both the Andrews and Yano and Koga models, which gave high coefficients of determination (0.97 and 0.98, respectively). On the other hand, the degradation ability of the activated sludge was found to be weak when the pesticide was used as the sole source of sulfur or phosphorus.

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Bioremediation of Hazardous Organics

Cited by 11 publications

References 83 publications

PAH removal by simultaneous and sequential inoculation of Pseudomonas monteilii P26 and Gordonia sp. H19 in the presence of biostimulants

PAH removal by simultaneous and sequential inoculation of Pseudomonas monteilii P26 and Gordonia sp. H19 in the presence of biostimulants

Isolation and Characterization ofPseudomonas stutzeriCapable of Reducing Fe(III) and Nitrate from Skarn-type Copper Mine Tailings

Comparison of different models of substrate inhibition in aerobic batch biodegradation of malathion

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