Recent advances in surfactant-enhanced In-Situ Chemical Oxidation for the remediation of non-aqueous phase liquid contaminated soils and aquifers

Besha, Abreham Tesfaye; Bekele, Dawit; Naidu, Ravi; Chadalavada, Sreenivasulu

doi:10.1016/j.eti.2017.08.004

Cited by 97 publications

(31 citation statements)

References 45 publications

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“…Various surfactants are now frequently applied in contaminated sites remediation for desorption and transferring pollutants from soil phase into the water phase, which definitely influenced the following remediation step for target pollutants removal (Besha, Bekele, Naidu, & Chadalavada, 2018;Iglesias, Sanromán, & Pazos, 2014;Mao, Jiang, Xiao, & Yu, 2015;Mulligan, Yong, & Gibbs, 2001;Panizza et al, 2013;Wang, Hoag, Collins, & Naidu, 2013;Ying, 2006). In this study, the frequently used surfactants, namely Tween 80, Triton X-100, and Brij 35, are selected, and their properties are listed in Supporting Information Table S3 (Iglesias et al, 2014).…”

Section: The Influence Of Surfactants On Btex Degradationmentioning

confidence: 99%

The performance of nCaO₂ for BTEX removal: Hydroxyl radical generation pattern and the influences of co‐existing environmental pollutants

Sun

Lyu

et al. 2019

Water Environment Research

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In this study, nano‐CaO2 (nCaO2) was successfully synthesized and constituted the nCaO2/Fe(II) system applying to remediate BTEX, which are typical mixed pollutants in contaminated groundwater. The particle size of the synthesized nCaO2 was 108.91 nm, and it displayed better BTEX remediation performance than that of commercial CaO2. The innovative generation pattern of hydroxyl radicals (HO·) in the nCaO2/Fe(II) system has been investigated using benzoic acid as the HO· probe, and the proper molar ratio of nCaO2/Fe(II) was optimized as 1/1. Over 90% of BTEX was removed in 180 min with the nCaO2/Fe(II)/BTEX molar ratio of 40/40/1. Further experiments evaluated the influence of co‐existence of mixed pollutants chlorinated hydrocarbon compounds (CHCs) or surfactant constituents on BTEX remediation performance. The experimental results suggested that CHCs have limited influence on BTEX removal rate and surfactants have negative effects on BTEX remediation performance in the experimental conditions. In conclusion, the findings in this study could give some inspirations to apply the nCaO2/Fe(II) process in remediating co‐existing pollutants in contaminated groundwater. Practitioner points nCaO2/Fe(II) system applied to remediate mixed contaminants. HO· generation pattern of the nCaO2/Fe(II) system has been investigated. The influence of chloride hydrocarbon compounds have been studied. The effects of surfactants were evaluated.

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Section: The Influence Of Surfactants On Btex Degradationmentioning

confidence: 99%

The performance of nCaO₂ for BTEX removal: Hydroxyl radical generation pattern and the influences of co‐existing environmental pollutants

Sun

Lyu

et al. 2019

Water Environment Research

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“…One kilogram of hydrogen peroxide has an environmental impact of 115 mPt, while persulfate has an environmental impact of 160 mPt per kilogram (calculated in SimaPro). It was assumed, based on the need for several injections of the oxidant to remediate the PCE in this case study and the similar efficiency of both oxidants in eliminating the contaminants, that the same amount of persulfate and hydrogen peroxide would be needed in this case [48,49]. Based on this assumption, the substitution of hydrogen peroxide with persulfate would not decrease the environmental impact of the chemical remediation alternative.…”

Section: The Effect Of Potential Substitutesmentioning

confidence: 98%

“…Due to the important contribution of hydrogen peroxide to the overall environmental impact of the chemical remediation alternative, we looked into potential substitute oxidants. Persulfate is another commonly used oxidant for ISCO of chlorinated solvents [48][49][50]. To assess whether persulfate would decrease the environmental impact of the chemical alternative both oxidants were compared based on the environmental impact of 1 kg of the oxidant.…”

Section: The Effect Of Potential Substitutesmentioning

confidence: 99%

Chemical or Natural? Including LCA in Social CBA to Compare Remediation Alternatives for a Dry-Cleaning Facility

2019

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The choice between remediation alternatives for contaminated sites is complicated by different elements, e.g., the occurrence of multiple contaminants, the extent of the contamination, or the urban location, complicate the choice between remediation alternatives. This paper addresses this challenging choice by analyzing a case study of an extensive soil and groundwater contamination by a dry-cleaning company. For remediating this site, two alternatives were proposed. The first remediation alternative combines several techniques with in-situ chemical oxidization being the most important one. Due to the potential negative impact of this alternative on local residents a second remediation alternative was drawn up, in which the focus lies on the use of stimulated biological degradation. A Life Cycle Assessment (LCA) was performed on both alternatives and showed that the second alternative had a lower environmental impact. The inclusion of monetized LCA results in the calculation of a social Cost-Benefit Analysis (CBA) provided a more extensive view of the secondary environmental costs and benefits of the remediation alternatives. The results of the social CBA allow to conclude that both alternatives are not socially desirable, the chemical alternative however is socially less disadvantageous than the more natural remediation alternative.

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“…Similarly, the removal of anthracene and pyrene reached 80-85%, which was 2-4 times the average removal achieved through chemical oxidation alone (Nadarajah et al, 2002). Generally, surfactant appears to have the potential to be used in conjunction with chemical oxidation to enhance the treatment of refractory organic contaminants (Besha et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

The combined effects of surfactant solubilization and chemical oxidation on the removal of polycyclic aromatic hydrocarbon from soil

Liao

Huling

et al. 2019

Science of The Total Environment

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A method for the remediation of polycyclic aromatic hydrocarbons (PAHs) contaminated soils was proposed involving a combination of surfactant-aided soil washing and chemical oxidation by activated persulfate (SP). In this study, Triton X-100 (TX-100) and SP was applied to the soil, either concurrently or sequentially. Results indicated that surfactant followed by amendment with a solution of SP, TX-100 + SP(l), was most effective in decreasing PAHs concentrations in a sandy loam soil (SS) and a silty clay soil (NS) from 1220 mg/kg and 2730 mg·kg to 414 mg·kg and 180 mg·kg, respectively. Compared with extraction alone and oxidation alone, TX-100 + SP(l) increased the removal of PAHs by 10-20%. TX-100 improved the degradation of 3-4 ring PAHs (M-PAHs) and 5-6 ring PAHs (H-PAHs) in SS, by approximately 8%-11%. The oxygenated polycyclic aromatic hydrocarbons (oxy-PAHs) including furans and xanthene exhibited greater reductions in soil when amended with the TX-100 and SP, than under TX-100 extraction or SP oxidation alone. Overall, increased removal of PAHs in contaminated soil can occur through simultaneous application of TX-100 and SP, relative to the sole use of TX-100 or SP. The sequential combination of surfactant and oxidant was most effective for the elimination of PAHs, especially for M-PAHs and H-PAHs in sandy loam contaminated soil.

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Recent advances in surfactant-enhanced In-Situ Chemical Oxidation for the remediation of non-aqueous phase liquid contaminated soils and aquifers

Cited by 97 publications

References 45 publications

The performance of nCaO₂ for BTEX removal: Hydroxyl radical generation pattern and the influences of co‐existing environmental pollutants

The performance of nCaO₂ for BTEX removal: Hydroxyl radical generation pattern and the influences of co‐existing environmental pollutants

Chemical or Natural? Including LCA in Social CBA to Compare Remediation Alternatives for a Dry-Cleaning Facility

The combined effects of surfactant solubilization and chemical oxidation on the removal of polycyclic aromatic hydrocarbon from soil

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Recent advances in surfactant-enhanced In-Situ Chemical Oxidation for the remediation of non-aqueous phase liquid contaminated soils and aquifers

Cited by 97 publications

References 45 publications

The performance of nCaO2 for BTEX removal: Hydroxyl radical generation pattern and the influences of co‐existing environmental pollutants

The performance of nCaO2 for BTEX removal: Hydroxyl radical generation pattern and the influences of co‐existing environmental pollutants

Chemical or Natural? Including LCA in Social CBA to Compare Remediation Alternatives for a Dry-Cleaning Facility

The combined effects of surfactant solubilization and chemical oxidation on the removal of polycyclic aromatic hydrocarbon from soil

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The performance of nCaO₂ for BTEX removal: Hydroxyl radical generation pattern and the influences of co‐existing environmental pollutants

The performance of nCaO₂ for BTEX removal: Hydroxyl radical generation pattern and the influences of co‐existing environmental pollutants