Statistical factor-screening and optimization in slurry phase bioremediation of 2,4,6-trinitrotoluene contaminated soil

Sheibani, Gelareh; Hejazi, Parisa

doi:10.1016/j.jhazmat.2011.01.112

Cited by 12 publications

(6 citation statements)

References 56 publications

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“…The bioreactor operated with molasses as a co-substrate was more effective than landfarming, reaching 99% TNT removal. High TNT percent removal (78-92%) was also observed by Sheibani et al 16 in a slurry bioreactor treating a contaminated soil (1 g/kg) supplemented with glucose as a cosubstrate and Tween 80 as surfactant.…”

Section: Slurry Bioreactorssupporting

confidence: 68%

Ex Situ Bioremediation of Contaminated Soils: An Overview of Conventional and Innovative Technologies

Tomei

Daugulis

2012

Critical Reviews in Environmental Science and Technology

127

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Bioremediation as a sustainable alternative to chemical-physical processes is an attractive solution for soil decontamination and renewal of polluted sites. Depending on the site characteristics and target treatment requirements for the decontaminated soil, in situ or ex situ technologies are employed. Ex situ technologies are advantageous when a safe and effective intervention is required (i.e., in the presence of severe contamination of highly hazardous compounds). In this review, conventional and innovative ex situ technologies for soil bioremediation are presented. For each one the principle of operation and recent applications are reported. In addition, strategies to improve their efficiency are explored. Finally, the possibility of making these technologies more competitive by indicating research needs for their future development is highlighted.

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Section: Slurry Bioreactorssupporting

confidence: 68%

Ex Situ Bioremediation of Contaminated Soils: An Overview of Conventional and Innovative Technologies

Tomei

Daugulis

2012

Critical Reviews in Environmental Science and Technology

127

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“…The application of RSM in biological and chemical processes has been investigated . In the field of membrane science, RSM has been mainly used for the optimization of operating conditions in membrane processes .…”

Section: Introductionmentioning

confidence: 99%

Identification of optimum synthesis conditions for a novel anion exchange membrane by response surface methodology

Kikhavani

Ashrafizadeh

Bruggen

2013

J of Applied Polymer Sci

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The Response Surface Methodology (RSM) was employed for the optimization of the synthesis conditions of an anion exchange membrane. A novel chlorinated‐polypropylene heterogeneous anion exchange membrane was made via phase inversion. A nonionic surfactant was incorporated into the composition as an additive to enhance the membrane properties. The membrane performance was measured in terms of ion exchange capacity (IEC) and permselectivity. An experimental design was used to quantify the effects of variables including the ratio of resin/polymer, the ratio of additive/total solid, and the ratio of solvent/polymer, on IEC and permselectivity. For each function, a quadratic model was developed to correlate the relationship between variables and the response. The results demonstrated the accuracy of the two models. The anion exchange membrane with the best combination of a high IEC and high permselectivity was synthesized with a solvent/polymer ratio of 18.63 (v/w), resin/polymer ratio of 1 (w/w), and additive/total solid ratio of 0.02 (w/w). © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 39888.

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“…Sheibani et al (2011) also reported that 95.2 % of TNT removal was obtained when 6.25 g/L of glucose was supplied. Wang et al (2010) suggested that the C-N ratio was the key parameter affecting the biodegradation rate of TNT.…”

Section: Microcosm Experimentsmentioning

confidence: 93%

“…These compounds include 2,4,6-trinitrotoluene (TNT). TNT and its by-products [e.g., 2,6-dinitrotoluene (2,6-DNT), 2,4-dinitrotoluene (2,4-DNT), nitrobenzene (NB)] are reported as highly toxic and carcinogenic (Sheibani et al 2011), and these chemicals are very difficult to be removed from the environment. Among these explosive compounds, TNT has been extensively used worldwide.…”

Section: Introductionmentioning

confidence: 99%

Bioremediation of 2,4,6-trinitrotoluene-contaminated groundwater using unique bacterial strains: microcosm and mechanism studies

Sheu

Lien

Chen

et al. 2016

Int. J. Environ. Sci. Technol.

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Groundwater at many military factory, munition storage and maneuver sites is contaminated by explosives chemicals that were released into the subsurface. The 2,4,6-trinitrotoluene (TNT) is among the most common explosive pollutants. In this study, two TNT-degrading strains, isolated from TNT-contaminated soils and wastewater sludge, were applied for TNT biodegradation. Based on the 16S rDNA sequence analyses, these two bacterial strains were identified as Achromobacter sp. and Klebsiella sp. via biochemical and DNA analyses. Microcosm study was conducted to evaluate the feasibility and efficiency of TNT biodegradation under aerobic conditions. Results indicate that TNT degradation by-products were detected in microcosms (inoculated with Achromobacter sp. and Klebsiella sp.) with cane molasses addition. Klebsiella sp. and Achromobacter sp. used TNT as the nitrogen source and caused completely removal of TNT. Two possible TNT biodegradation routes could be derived: (1) part of the TNT was transformed to nitrotoluene then transformed to nitrobenzene followed by the nitro substitute process, and trinitrobenzene, dinitrobenzene, and nitrobenzene were detected; and (2) TNT was transformed via the nitro substitute mechanism, and dinitrotoluene followed by nitrotoluene isomers were detected. The initial TNT degradation involved the reduction or removal of the nitro substitute to an amino derivative or free nitrite. Results show that the second route was the dominant TNT biodegradation pathway. The produced by-products were also degraded without significant accumulation during the degradation process. These findings would be helpful in designing a practical system inoculated with isolated TNT degradation strains for the treatment of TNT-contained groundwater.

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Statistical factor-screening and optimization in slurry phase bioremediation of 2,4,6-trinitrotoluene contaminated soil

Cited by 12 publications

References 56 publications

Ex Situ Bioremediation of Contaminated Soils: An Overview of Conventional and Innovative Technologies

Ex Situ Bioremediation of Contaminated Soils: An Overview of Conventional and Innovative Technologies

Identification of optimum synthesis conditions for a novel anion exchange membrane by response surface methodology

Bioremediation of 2,4,6-trinitrotoluene-contaminated groundwater using unique bacterial strains: microcosm and mechanism studies

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