Benzene, toluene, and o-xylene degradation by free and immobilized P. putida F1 of postconsumer agave-fiber/polymer foamed composites

Robledo‐Ortíz, Jorge R.; Ramírez‐Arreola, Daniel E.; Pérez‐Fonseca, Aida Alejandra; Gómez, César; González-Reynoso, Orfil; Ramos-Quirarte, J.; González‐Núñez, Rubén

doi:10.1016/j.ibiod.2010.12.011

Cited by 42 publications

(12 citation statements)

References 24 publications

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“…Figure shows FTIR spectra of the materials before and after the adsorption process to investigate some possible interactions between metal ions and chelating groups of the adsorbent. All samples showed two peaks at 2930 and 2850 cm −1 , assigned to CH stretching of CH 2 groups principally of the polymeric matrix, as well as a signal at 1460 cm −1 related to the long chains of this polymer . The peak at 1030 cm −1 is attributed to stretching vibrations of CO groups especially from cellulose and they are related to the Agave fibers.…”

Section: Resultsmentioning

confidence: 94%

Improvement of Pb(II) Adsorption Capacity by Controlled Alkali Treatment to Chitosan Supported onto Agave Fiber‐HDPE Composites

García-Sánchez

Pérez‐Fonseca

Gómez

et al. 2017

Macromolecular Symposia

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In this study, the effect of chitosan alkali treatment supported onto agave fiber‐high density polyethylene composites over their Pb(II) adsorption properties was evaluated. The chitosan was placed in a beaker with a solution of NaOH bubbling air for 24 hours and controlling the pH around 10. Afterwards the chitosan was washed, filtered and dried. Composite pellets with 30% of agave fibers and 70% of high density polyethylene (HDPE) were coated with untreated chitosan (UC) and treated chitosan (TC) to be used in batch Pb(II) adsorption experiments. The results showed that the adsorption process was described by the Langmuir behavior and with a pseudo second order kinetics for both, UC and TC composites. The maximum adsorption capacities were obtained at pH = 5 with values of 2.08 and 2.44 mg/g composite for UC and TC composites respectively which represents an improvement of 17% by the alkali treatment. FTIR and NMR analysis were also carried out for a better understanding of the adsorption process.

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Section: Resultsmentioning

confidence: 94%

Improvement of Pb(II) Adsorption Capacity by Controlled Alkali Treatment to Chitosan Supported onto Agave Fiber‐HDPE Composites

García-Sánchez

Pérez‐Fonseca

Gómez

et al. 2017

Macromolecular Symposia

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“…It has also been observed that Pseudomonas aeruginosa presented a good mineralization rate, because the values of Y x/s , the yield of substrate transformed into biomass, were higher than the ones presented in literature for Pseudomonas putida F1. For benzene: 0.60 (Robledo-Ortíz et al, 2011), 0.75 (Abuhamed et al, 2004) and for toluene: 0.60 (Robledo-Ortíz et al, 2011), 0.58 (Abuhamed et al, 2004).…”

Section: Resultsmentioning

confidence: 98%

KINETICS OF THE BIODEGRADATION OF MONOAROMATICS BY Pseudomonas aeruginosa

Câmara

Sousa

Neto

2019

Braz. J. Chem. Eng.

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Water contamination by monoaromatic compounds has risen throughout time, which leads to the necessity of developing new water treatment technology, capable of minimizing their negative effect on the environment. In this context, biological processes present themselves as a solution to the processes of extraction. Bioremediation makes use of microbial groups capable of using hydrocarbons as a source of carbon to perform their metabolic functions. This work evaluated the biodegradation efficiency of Pseudomonas aeruginosa strain isolated from contaminated matrices, for the substrates benzene, ethylbenzene and toluene, aiming to determine to which compound the bacteria had better adaptation. For that, bioremediation assays were performed for each of the monoaromatic compounds, in an isolated way, with the goal of obtaining experimental data and from this Monod and Andrews kinetic models were discretized and numerically developed through the Runge-Kutta method. It was possible to observe that Pseudomonas aeruginosa has a bigger affinity for ethylbenzene, while benzene generated a bigger microbian coefficient. Monod´s model was capable of predicting satisfactorily the experimental data.

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“…Irreversible sorption rate ( k 3 ) of toluene on solid matrix was estimated from the BTC of toluene only, whereas sorption and desorption rates ( k 5 and k 6 ) of contaminant on bacterial surfaces were estimated from the BTC of toluene in the presence of P. putida . The decay and growth kinetic parameters ( k dm , k di , Y ,

μ_{max}

, and K s ) were adopted from the previous researches on degradation. The values of the parameters used for model verification are summarized in Table .…”

Section: Model Verificationmentioning

confidence: 99%

Bacteria associated transport of toluene in quartz sand: Model development and verification

Lee

Kim

Lee

2014

Environ. Prog. Sustainable Energy

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In this study, we proposed a new model which is capable of describing bacteria associated transport of toluene which showed a significant tailing in the breakthrough curve (BTC) in the literature. In order to realize the tailing, a new model approach was attempted by inclusion of irreversible sorption for toluene onto solid matrix, kinetic reversible sorption for bacteria onto solid matrix, and kinetic reversible sorption for toluene onto bacterial surfaces in addition to biodegradation. Simulation of toluene transport with various sorption related model parameters revealed that the observed tailing part of the toluene BTC was best described by inclusion of kinetic reversible sorption of toluene onto bacterial surfaces. This indicates that (i) nonfacilitated or tailing enhanced transport of toluene can be described by using only the kinetic reversible process rather than irreversible or equilibrium sorption process, and (ii) the tailing enhanced transport is attributed to the biosorption as a result of sorption and desorption of toluene onto bacterial surfaces. This modeling approach to elucidate the evidence of bacteria associated transport of toluene in terms of enhanced tailing is the first attempt in the organic contaminant transport modeling and would be a benchmark in modeling the fate of toluene during transport.

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Benzene, toluene, and o-xylene degradation by free and immobilized P. putida F1 of postconsumer agave-fiber/polymer foamed composites

Cited by 42 publications

References 24 publications

Improvement of Pb(II) Adsorption Capacity by Controlled Alkali Treatment to Chitosan Supported onto Agave Fiber‐HDPE Composites

Improvement of Pb(II) Adsorption Capacity by Controlled Alkali Treatment to Chitosan Supported onto Agave Fiber‐HDPE Composites

KINETICS OF THE BIODEGRADATION OF MONOAROMATICS BY Pseudomonas aeruginosa

Bacteria associated transport of toluene in quartz sand: Model development and verification

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