surfactant soil washing

Surfactant-Enhanced Soil Washing for Removal of

2018-6-1  The adsorption of surfactants may also increase the hydrophobicity of soil surfaces, which promotes the re-adsorption of the solubilized organic contaminants onto the soil surfaces and further decreases the efficiency of washing (Chu and Chan, 2003; Ishiguro and Koopal, 2016).

Combined Effects of Surfactant-Assisted Soil Washing and ...

2020-11-18  2.3. Soil washing experiments Brij 58, a non-ionic surfactant, was selected as the model surfactant in this study, as it has rarely been reported in the literature. The Brij 58 solution was prepared by dissolving an appropriate amount of surfactant in distilled water to achieve concentrations higher than its critical micelle

Soil Washing Potential of a Natural Surfactant ...

1997-2-27  HCB recoveries after 12 pore volumes of flushing with 0.5 and 1% natural surfactant solutions were 20 and 100 times more than that recovered by water flooding. These promising results warrant further research to establish the usefulness of plant

Surfactant selection for enhancing ex situ soil washing ...

1999-2-1  Surfactant enhanced soil washing can result from two distinct mechanisms: one occurs below the critical micelle concentration (soil rollup mechanism) and the other occurs above the critical micelle concentration (solubilization). Surfactant monomers are responsible for the soil rollup mechanism which occurs in two steps.

Soil Washing Potential of a Natural Surfactant ...

2019-5-26  Natural surfactant solutions were also employed for flushing HCB from one-dimensional soil columns. HCB recoveries after 12 pore volumes of flushing with 0.5 and 1% natural surfactant solutions were 20 and 100 times more than that recovered by water flooding.

Combination of surfactant enhanced soil washing and ...

The washing solution was enriched with surfactant Tween 80 at different concentrations, higher than the critical micellar concentration (CMC). The impact of soil washing was evaluated on the hydrocarbons concentration in the leachates collected at the bottom of the soil columns.

SURFACTANT SELECTION FOR ENHANCING EX SITU SOIL

Surfactant-enhanced soil washing is being con-sidered with increasing frequency to actually achieve soil-contaminant separation. In this research eight anionic and nonionic surfactants were evaluated for the enhanced soil washing of three di•erent soils contaminated with petroleum hydrocarbons. Enhanced soil washing occurred at surfactant concen-

Surfactant-Enhanced Washing of Soils Contaminated with ...

2013-12-31  them the surfactant-enhanced soil washing (SESW) have recently emerged as highly cost-effective [2-4]. Surfac- tants reduce surface tension and form aggregates (i.e. micelles in aqueous solution), changing surface tension as result of surfactant’s concentration on the solution’s surface. Contaminants present in soil are removed by

Surfactant-Enhanced Soil Washing for Removal of

Among many treatment methods practiced for remediation of petroleum-contaminated soils, surfactant-enhanced soil washing has been widely practiced as a preferred treatment option, as it is a fast and environmentally accepted method.

Optimization of aeration enhanced surfactant soil

34 行  2019-12-5  Soil washing using surfactants transfers the pollutants from the soil colloid to the

Soil Washing Potential of a Natural Surfactant ...

2019-5-26  Surfactant screening for soil washing: Comparison of foamability and biodegradability of a plant‐based surfactant with commercial surfactants. Journal of Environmental Science and Health, Part A 1998, 33 (7) , 1249-1273. DOI: 10.1080/10934529809376787.

(PDF) Surfactant-enhanced soil washing for the

The application of surfactant-enhanced soil washing for the remediation of soil contaminated with a chlorinated pesticide was tested. The pesticide used, 2,4-dichlorophenoxyacetic acid (2,4-D), is ...

Surfactant-Enhanced Soil Washing for Removal of

An increase in energy demand leads to further exploration, transportation, and utilization of petroleum, which creates severe soil contamination because of recurrent accidents and oil spills. Remediation of these contaminated soils is challenging. Among many treatment methods practiced for remediation of petroleum-contaminated soils, surfactant-enhanced soil washing has been widely practiced ...

SURFACTANT SELECTION FOR ENHANCING EX SITU SOIL

Surfactant enhanced ex situ soil washing can o•er the convenience, e†ciency and economy desir-able for innovative and alternative soil washing technologies. Guidance in selecting surfactants to be evaluated in ex situ soil washing is important for the soil remediation industry; such is the focus of

Surfactant-enhanced soil washing for the remediation

The application of surfactant-enhanced soil washing for the remediation of soil contaminated with a chlorinated pesticide was tested. The pesticide used, 2,4-dichlorophenoxyacetic acid (2,4-D), is one of the most widely applied in Mexico. The effectiveness of two different surfactants: sodium dodecyl sulphate (SDS) and ethoxylated lauryl ether (Brij 30), at removing 2,4-D from the soil was...

Soil Surfactant Flushing/Washing Taylor Francis

2021-1-27  This chapter aims to provide an overview of two related technologies that are still very much in the development stage: soil surfactant flushing and soil surfactant washing. The use of aqueous surfactant systems for the recovery of oil has been common for some years and certainly suggests the employment of surfactants for the remediation of ...

Soil Clean-Up by Surfactant Washing. III. Design and ...

2006-9-23  (1993). Soil Clean-Up by Surfactant Washing. III. Design and Evaluation of the Integrated Pilot-Scale Surfactant Recycle System. Separation Science

Remediation of Contaminated Soils by Surfactant

Reciprocal surfactant-soil solubilization coefficients (1 / K d), octanol-water partition coefficients (K ow), fractional organic carbon content of the soil (f oc), and surfactant concentration were correlated for the soil-washing process using a proposed surfactant-aided soil-washing model.

Removal of PAHs with surfactant-enhanced soil washing ...

2011-9-28  Surfactant soil washing The removal of individual PAH shows similar trend (data not shown); therefore the total removal ratio of the five target PAHs is discussed thereafter. Fig. 2a–f present the removal ratios of tests 1–6. Observation of these figures reveals that the first four factors, i.e., stirring speed, washing time, surfactant ...

Effect of Ultrasound on Surfactant-Aided Soil Washing

The use of ultrasound as an enhancement mechanism in the surfactant-aided soil-washing process was examined by conducting desoption tests of soils contaminated with naphthalene or diesel-oil. The experiments were conducted to elucidate the effect of ultrasound on the mass transfer from soil to the aqueous phase using naphthalene-contaminated soil.

(PDF) Surfactant-enhanced soil washing for the

The application of surfactant-enhanced soil washing for the remediation of soil contaminated with a chlorinated pesticide was tested. The pesticide used, 2,4-dichlorophenoxyacetic acid (2,4-D), is ...

Soil Surfactant Flushing/Washing Taylor Francis

2021-1-27  This chapter aims to provide an overview of two related technologies that are still very much in the development stage: soil surfactant flushing and soil surfactant washing. The use of aqueous surfactant systems for the recovery of oil has been common for some years and certainly suggests the employment of surfactants for the remediation of ...

Removal of PAHs with surfactant-enhanced soil washing ...

2011-9-28  Surfactant soil washing The removal of individual PAH shows similar trend (data not shown); therefore the total removal ratio of the five target PAHs is discussed thereafter. Fig. 2a–f present the removal ratios of tests 1–6. Observation of these figures reveals that the first four factors, i.e., stirring speed, washing time, surfactant ...

Remediation of Contaminated Soils by Surfactant

Reciprocal surfactant-soil solubilization coefficients (1 / K d), octanol-water partition coefficients (K ow), fractional organic carbon content of the soil (f oc), and surfactant concentration were correlated for the soil-washing process using a proposed surfactant-aided soil-washing model.

Surfactant enhanced soil washing technique for

Increasingly stringent environmental regulations and legislation around the world are demanding the development of environmentally friendly technologies for contaminated site remediation. Researchers have recognized soil washing as an economically promising in-situ treatment method. Despite research indicating the effectiveness of soil washing with the aid of aqueous acids or chelating agents ...

Soil Clean-Up by Surfactant Washing. III. Design and ...

2006-9-23  (1993). Soil Clean-Up by Surfactant Washing. III. Design and Evaluation of the Integrated Pilot-Scale Surfactant Recycle System. Separation Science

Effect of Ultrasound on Surfactant-Aided Soil Washing

The use of ultrasound as an enhancement mechanism in the surfactant-aided soil-washing process was examined by conducting desoption tests of soils contaminated with naphthalene or diesel-oil. The experiments were conducted to elucidate the effect of ultrasound on the mass transfer from soil to the aqueous phase using naphthalene-contaminated soil.

The mechanism of the surfactant-aided soil washing

A surfactant-aided soil washing mechanism is proposed in this study by examining nine common organic contaminants, which were divided into two groups, hydrophobic compounds and partial hydrophobic compounds, depending on the respective soil partitioning of contaminants, K(oc).

Effect of Ultrasound on Surfactant-Aided Soil Washing ...

2007-7-26  The use of ultrasound as an enhancement mechanism in the surfactant-aided soil-washing process was examined by conducting desoption tests of soils contaminated with naphthalene or diesel-oil. The experiments were conducted to elucidate the effect of ultrasound on the mass transfer from soil to the aqueous phase using naphthalene-contaminated soil.

Removal of As, Cd, Cu, Ni, Pb, and Zn from a highly ...

Surfactant enhanced soil washing (SESW) was applied to an industrial contaminated soil. A preliminary characterization of the soil regarding the alkaline-earth metals, Na, K, Ca and Mg took values of 2866, 2036, 2783 and 4149 mg/kg. The heavy metals As, Cd, Cu, Pb, Ni and Zn, had values of 4019, 14, 35582, 70, 2603, and 261 mg/kg, respectively.

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