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Modeling the two stages of surfactant-aided soil

Soil-washing performance was quantified using reciprocal surfactant-soil solubilization coefficients (1/K(d)). Two stages of partitioning were identified. In stage 1, the dye concentration increased slightly with increasing surfactant dose until surfactant monomers saturated the bulk solution at the critical micelle concentration (cmc).

Surfactant-Enhanced Washing of Soils Contaminated with

2013-12-31  80) for the same washing process, finding that synthetic surfactants were clearly less efficient (40% and 35%, removal, respectively). Another experiment using a non- ionic surfactant Brij 35 showed removals of crude oil from soils of 93.54% in a surfactant-enhanced washing of soil contaminated with 50,000 mg/kg of crude oil [12].

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

Use of surfactants for the remediation of

2015-3-21  In this review, the considerations for a surfactant-enhanced soil washing, and the mechanism for the removal of different types of contaminants from soils are summarized and discussed, with purposes of providing an overview of the influence of surfactants’ properties on the remediation process and the interactions between soil contaminants and surfactant-containing eluents.

Surfactant-Enhanced Washing of Soils Contaminated with

2013-12-31  80) for the same washing process, finding that synthetic surfactants were clearly less efficient (40% and 35%, removal, respectively). Another experiment using a non- ionic surfactant Brij 35 showed removals of crude oil from soils of 93.54% in a surfactant-enhanced washing of soil contaminated with 50,000 mg/kg of crude oil [12].

Soil Surfactant Flushing/Washing Hazardous Waste

2020-3-8  Soil Surfactant Flushing/Washing. By David J. Wilson, Ann N. Clarke. 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

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

Modeling the two stages of surfactant-aided soil

Soil-washing performance was quantified using reciprocal surfactant-soil solubilization coefficients (1/K(d)). Two stages of partitioning were identified. In stage 1, the dye concentration increased slightly with increasing surfactant dose until surfactant monomers saturated the bulk solution at the critical micelle concentration (cmc).

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.

Soil washing using various nonionic surfactants and

2008-6-15  The efficiency of soil washing was highest when using Brij 30 with the highest solubilizing ability for phenanthrene and low adsorption onto soil. In the selective adsorption step, surfactant recovery was quite effective for all surfactants ranging from 85.0 to 89.0% at 1

Soil Decontamination by Soil Washing Technique Using

Soil washing with surfactant helps in removal of NAPL’s.Although the use of surfactants to remediate contaminants in the subsurface is a relatively new area of application, their use in subsurface systems dates back to 1963 when petroleum sulfonates were patented for widespread use in enhanced oil recovery efforts [5-6].

Surfactant-Enhanced Treatment of Oil-Contaminated

The overall goal of this research is to significantly improve soil washing of oil-based drill cuttings and oil-contaminated soils. In past research within our institute we have demonstrated that surfactant-enhanced soil washing is more efficient and economical than water-only washing for removing gasoline from contaminated soil.

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 screening for soil washing: Comparison of

2018-6-10  (1998). 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: Vol. 33, No. 7, pp. 1249-1273.

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

[PDF] Effect of Surfactant Types on Washing of Diesel

2020-11-28  The effects of surfactant types and the ratio of nonionic and anionic surfactants on the washing of diesel contaminated soil were investigated. In batch tests, the nonionic surfactant, which has HLB within 12-13, showed a high diesel removal efficiency and Tergitol 15-S-7 (T15S7) with 20 g/L concentration exhibited the highest removal efficiency of 79-88% among the tested nonionic surfactants.

Modeling the two stages of surfactant-aided soil

Soil-washing performance was quantified using reciprocal surfactant-soil solubilization coefficients (1/K(d)). Two stages of partitioning were identified. In stage 1, the dye concentration increased slightly with increasing surfactant dose until surfactant monomers saturated the bulk solution at the critical micelle concentration (cmc).

Soil washing using various nonionic surfactants and

2008-6-15  The efficiency of soil washing was highest when using Brij 30 with the highest solubilizing ability for phenanthrene and low adsorption onto soil. In the selective adsorption step, surfactant recovery was quite effective for all surfactants ranging from 85.0 to 89.0% at 1

Surfactant-Enhanced Treatment of Oil-Contaminated

The overall goal of this research is to significantly improve soil washing of oil-based drill cuttings and oil-contaminated soils. In past research within our institute we have demonstrated that surfactant-enhanced soil washing is more efficient and economical than water-only washing for removing gasoline from contaminated soil.

Process for in-situ surfactant washing of contaminated

In addition, soil-contaminant samples are used in the important selection of a surfactant and an aqueous surfactant concentration for purposes of the washing operation of our process. Soil-contaminant samples may be packed into a cylindrical glass column for a laboratory testing and selection of the surfactant.

Removal of Heavy Metals from the Contaminated Soil

2019-7-1  efficiency of soil washing process, and reduced the concentration of heavy metal such as chromium and copper from the soil by using bio surfactant (Tween -80). This bench scale model can process up to 2.5 kg of contaminated soil at a time. This model is

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.

Effects of nonaqueous phase liquids on the washing of

2016-8-27  complicating the surfactant-aided soil-washing process. Malathion is a widely used organophosphate pesticide in agriculture (WHO/FAO, 1977) and for controlling mosquito-born diseases (Mccarroll et al., 2000).It can cause disruption of the nervous system, and humans exposed to the chemical may experience breathing