Engineered Bioremediation of NAPL Polluted Sites: Experimental and Simulation-Optimization Approach under Heterogeneous Moisture and Temperature Conditions

Gupta, Pankaj Kumar; Yadav, Basant; Yadav, Brijesh Kumar; Sushkova, Svetlana; Basu, Shreejita

doi:10.1061/(asce)ee.1943-7870.0001891

Cited by 6 publications

(5 citation statements)

References 43 publications

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“…Toxic or carcinogenic discharge of LNAPL hydrocarbons in the soil and water in coastline areas has been rampantly contaminating the semiarid landscape in coastal proximity, inducing substantial pitfalls and damage to aquatic life as well as settled populations in the vicinity [ 1 , 2 , 3 , 5 ]. The complication is more perilous in regions where petroleum and refinery industries are based [ 1 ].…”

Section: Lnapl In a Soil–water Systemmentioning

confidence: 99%

“…The impact of soil moisture content and groundwater temperature on NAPL biodegradation was previously studied; however, attention to their combined effect was not considered. Gupta et al [ 5 ] designed a unique bioremediation system by incorporating practical experiments, process-based models and optimization simulators to remediate NAPL-polluted sediments under varying soil moisture and temperature conditions. Their study considers their combined effect on the biodegradation of dissolved toluene through a series of microcosm experiments.…”

Section: Engineered Bioremediation Of Napl-polluted Sitesmentioning

confidence: 99%

“… Flow of organic contaminants in soil–water systems under varying groundwater flow conditions, adapted from Gupta et al [ 5 ]. …”

Section: Figurementioning

confidence: 99%

“…They suggest that the application of in situ bioremediation methods in the region of high temperature, with moisture content near field capacity, is the most efficient and cost-effective. Gupta et al [5] provide a unique engineered bioremediation design for treating hydrocarbon-polluted variably saturated zones in different seasons. Bioaugmentation and biostimulation using microbial inoculation or inorganic mineral supplements.…”

Section: Engineered Bioremediation Of Napl-polluted Sitesmentioning

confidence: 99%

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Bioremediation of Organic Pollutants in Soil–Water System: A Review

Gupta

Gandhi

2023

BioTech

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Soil–water pollution is of serious concern worldwide. There is a public outcry against the continually rising problems of pollution to ensure the safest and healthiest subsurface environment for living beings. A variety of organic pollutants causes serious soil–water pollution, toxicity and, therefore, the removal of a wide range of organic pollutants from contaminated matrix through the biological process rather than physico-chemical methods is an urgent need to protect the environment and public health. Being an ecofriendly technology, bioremediation can solve the problems of soil–water pollution due to hydrocarbons as it is a low-cost and self-driven process that utilises microorganisms and plants or their enzymes to degrade and detoxify pollutants and thus, promote sustainable development. This paper describes the updates on the bioremediation and phytoremediation techniques which have been recently developed and demonstrated at the plot-scale. Further, this paper provides details of wetland-based treatment of BTEX contaminated soils and water. The knowledge acquired in our study contributes extensively towards understanding the impact of dynamic subsurface conditions on engineered bioremediation techniques.

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Section: Lnapl In a Soil–water Systemmentioning

confidence: 99%

Section: Engineered Bioremediation Of Napl-polluted Sitesmentioning

confidence: 99%

“… Flow of organic contaminants in soil–water systems under varying groundwater flow conditions, adapted from Gupta et al [ 5 ]. …”

Section: Figurementioning

confidence: 99%

Section: Engineered Bioremediation Of Napl-polluted Sitesmentioning

confidence: 99%

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Bioremediation of Organic Pollutants in Soil–Water System: A Review

Gupta

Gandhi

2023

BioTech

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“…With repeated rises and falls due to GTF, LNAPLs that float on the surface layer are particularly susceptible to adsorption into the porous region surrounding the water table, known as the smear zone [ 19 , 20 ]. Previous studies have shown that water level fluctuation has a significant influence on the migration of organic pollutants throughout the water table [ 21 ], suggesting that the dissolution and biodegradation of LNAPL components is likely to increase [ 22 ].…”

Section: Introductionmentioning

confidence: 99%

The Migration Mechanism of BTEX in Single- and Double-Lithology Soil Columns under Groundwater Table Fluctuation

Zheng,

Yang,

et al. 2023

Toxics

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The migration of light non-aqueous phase liquids (LNAPLs) trapped in porous media is a complex phenomenon. Groundwater table fluctuation can not only affect contaminant migration but also redox conditions, bacterial communities, and contaminant degradation. Understanding LNAPLs’ (e.g., benzene, toluene, ethylbenzene, and xylene (BTEX)) behavior within porous media is critical for the high efficiency of most in situ remediation systems. A laboratory study of single- and double-lithology soil column investigation of the groundwater table fluctuation effect on BTEX transport, using benzene and toluene as typical compounds, in a typical representative model of aquifers subjected to water table fluctuation was undertaken in this study. The results show that benzene and toluene migration in single-lithology soil columns packed with sand was mainly affected by flushing due to the hydraulic force induced by water table fluctuations and that the double-lithology soil column packed with sand and silt was significantly affected by retention due to the higher adsorption induced by 10 cm of silt. The dissolution mainly correlated with the BTEX migration in saturated zones, and the contaminant concentration increased when the water table fell and decreased when the water table rose. For a contaminated site with a single-lithology structure consisting of sand, more attention should be paid to organic contaminant removal within the groundwater, and a double-lithology structure containing silt is more suited to the removal of organic contaminants from the silt layer. The difference in biodegradation kinetics between the groundwater table fluctuation (GTF) zone and the saturated zone should be better understood for the remediation of BTEX compounds.

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Groundwater and soil contamination by LNAPL: State of the art and future challenges

Mineo

2023

Science of The Total Environment

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Engineered Bioremediation of NAPL Polluted Sites: Experimental and Simulation-Optimization Approach under Heterogeneous Moisture and Temperature Conditions

Cited by 6 publications

References 43 publications

Bioremediation of Organic Pollutants in Soil–Water System: A Review

Bioremediation of Organic Pollutants in Soil–Water System: A Review

The Migration Mechanism of BTEX in Single- and Double-Lithology Soil Columns under Groundwater Table Fluctuation

Groundwater and soil contamination by LNAPL: State of the art and future challenges

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