Feasibility of in Situ Napl-Contaminated Aquifer Bioremediation by Biodegradable Nutrient–surfactant Mix

Zoller, Uri; Rubin, Hillel

doi:10.1081/ese-100105724

Cited by 11 publications

(6 citation statements)

References 17 publications

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“…Our ideated technology requires, methodologically, (a) the development and optimization, via in vitro "vessel" (containers) and "flow" (columns) lab experiments and screening processes of the most effective mixture for the intended SSNM-enhanced bioremediation; and (b) the quantitative study of the combined effects of the optimized SSNM, in below CMC concentrations, on the solubilization/mobilization and biodegradation of NAPL (fuel) in the site/aquifer's simulated bioremediation, using toluene and kerosene as fuel representatives, and soil (as is) from the NAPL-contaminated site. The objective was, to examine the combined effect of our SSNM I and/or SSNM2 mixtures [ 11] on the rate and extent of in situ biodegradation of entrapped LNAPLs in a sandy soil matrix of NAPL-contaminated aquifer.…”

Section: Introduction: the Problem Scope And Backgroundmentioning

confidence: 99%

Surfactant-nutrient mix-enhanced bioremediation of soil/aquifers

Zoller

2019

Eco-Tech

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Our research involves the development of economically feasible surfactant/surfactant-nutrient mix (SSNM) -enhanced bioremediation methodology for sustainable, in situ bioremediation of fuel-contaminated aquifers via in vitro column-based optimization of an effective SSNM and the study of its effect on the solubilization/mobilization and biodegradation of NAPL (fuel) in in vitro site/aquifer-simulated bioremediation, The essence of our findings: kerosene's maximum enhanced mobilization -f= 3,6, compared with that of deionized water, was achieved with an SSNM having the composition of linear alkylbenzene sulfonate: coco amphodiacetate: surfactant-nutrient X = 0, I 5: 0, I 5: 0,05 g/L, respectively; 60-64% of the initial amount of kerosene in the "packed" saturated soil matrix, has been eluted from it during -30 days, compared with -87% of toluene during the same time period and 68% of kerosene biodegradation in "vessel" settings, in 21 days, In conclusion: The indigenous microorganisms present in the vaduse zones of fuel-contaminated sandy soil aquifers are capable of removing up to ~81 % of the initially contained kerosene in ~42 days, Optimized SSNMs enhance both, mobilization of the balky NAPLs and the desorbtion/solubilization/ dispersion of the entrapped NAPL which, in tum, facilitate their enhanced biodegradation,

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Section: Introduction: the Problem Scope And Backgroundmentioning

confidence: 99%

Surfactant-nutrient mix-enhanced bioremediation of soil/aquifers

Zoller

2019

Eco-Tech

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“…Techniques for remediation of polluted soil and groundwater previously applied include pumpand -treat, using a combination of the optimization methods and simulation models as proposed by Gorelick et al [18], Hot water flushing [19,20], air sparging [21] Cosolvent flushing [19], the use of surfactants [22], In situ bio-remediation [23]. The effectiveness of the remediation may be substantially improved if the location and extent of the contaminants source are known.…”

Section: Introductionmentioning

confidence: 99%

Numerical Reconstruction and Remediation of Soil Acidity on a One Dimensional Flow Domain with Constant and Linear Temporally Dependent Flow Parameters

Munene

Onyango

Muhavini

2018

CJAST

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A mathematical backward problem which involves solving a mathematical model based on a one dimensional advection -diffusion process of solute transport in a homogeneous soil structure is considered. The diffusion coefficient and advection velocity in the governing unsteady non-linear partial differential equation (PDE) are varied from constant to linearly dependent on time. This is done to develop a mathematical understanding of the initial root causes and levels of acidification in priori because determination of analytic solution involves a lot of assumptions making the results unrealistic as opposed to the our numerical experiment approach which is cost effective and more reliable results are obtained. Flow domain is assumed semi infinitely deep and homogeneous and it Original Research ArticlePeer-review history: The peer review history for this paper can be accessed here: http://www.sciencedomain.org/review-history/26541

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“…Bioaugmentation stimulates bioremediation by adding highly efficient degrading microorganisms . Several studies have investigated the combination of surfactant flushing with biostimulation (combining inorganic nutrients with the flushing fluid) for petroleum hydrocarbons remediation . However, information on the combination of soil flushing with bioaugmentation or the combination of biostimulation and bioaugmentation is less common .…”

Section: Introductionmentioning

confidence: 99%

Combinations of Surfactant Flushing and Bioremediation for Removing Fuel Hydrocarbons from Contaminated Soils

Yan

Chen

et al. 2016

CLEAN Soil Air Water

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A laboratory study was conducted to evaluate the contaminant removal efficiency of four soil flushing approaches (water flushing, surfactant flushing (Tween-80), bioremediation þ water flushing, and bioremediation þ surfactant flushing) in remediating diesel-contaminated soil. Two types of soil (sandy loam and silt loam) were studied. Bioremediation was conducted by the combination of bioaugmentation (adding a diesel-degrading microbial mixture) and biostimulation (adding nitrogen and phosphorus nutrients). Sandy loam, with lower organic carbon content and higher permeability, had higher total petroleum hydrocarbon (TPH) removal efficiency than silt loam for all four flushing treatments. Compared to water flushing, surfactant flushing significantly enhanced the TPH removal efficiency for both sandy loam and silt loams. In contrast, bioremediation alone (without combining with surfactant flushing) failed to enhance the TPH removal efficiency for sandy loam and silt loam. The likely reason was that migration and delivery of the inoculated TPH-degrading microorganisms was constrained by the soil porous matrix, preventing the microorganisms from spreading over the entire contaminated area. Surfactants can enhance bioremediation efficiency by facilitating the migration of degrading microorganisms and increasing contaminant bioavailability. A combination of surfactant flushing and bioremediation had the highest TPH removal efficiency (77.1% for sandy loam and 46.9% for silt loam) among the four flushing treatments. Overall, combining surfactant flushing with bioremediation appears to be a promising remediation strategy for sites contaminated by fuel hydrocarbons.

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Feasibility of in Situ Napl-Contaminated Aquifer Bioremediation by Biodegradable Nutrient–surfactant Mix

Cited by 11 publications

References 17 publications

Surfactant-nutrient mix-enhanced bioremediation of soil/aquifers

Surfactant-nutrient mix-enhanced bioremediation of soil/aquifers

Numerical Reconstruction and Remediation of Soil Acidity on a One Dimensional Flow Domain with Constant and Linear Temporally Dependent Flow Parameters

Combinations of Surfactant Flushing and Bioremediation for Removing Fuel Hydrocarbons from Contaminated Soils

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