simulation of soil washing with surfactants
Process Evaluation of Soil Washing Including .
Mathematical model simulation was performed for the whole process, which consists of soil washing, soil recovery, and soil re-washing. The optimal range of surfactant dosage was -fold critical ...
Removal of PAHs with surfactant-enhanced soil washing ...
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 ...
Fenton Oxidation of Polycyclic Aromatic .
Three well-characterized New Jersey soils, representing a wide range of organic carbon content, were artificially contaminated with a mixture of anthracene, phenanthrene, and fluoranthene to simulate PAH-contaminated field soil. Batch laboratory-scale surfactant-enhanced soil washing was used to remove PAH from these soils. Two nonionic ...
Effect of Ultrasound on Surfactant-Aided Soil Washing
Soil washing is a process of transferring contaminants from the soil phase to the water-based liquid phase and it has been used extensively. Soil washing with surfactants has been successfully1–4) employed to remove adsorbed or deposited organics including polychlorinated biphenyl and polycyclic aromatic hydrocarbon from soil.5) Surfactants
Removal of heavy metals from a contaminated soil using ...
soil surface with clean soils, (v) dilution method (mixing polluted soils with surface and subsurface clean soils to reduce the concentration of heavy metals), (vi) phytoremediation by plants such as woody trees ( GOC, 2003; Fawzy, 2008; Nouri et al., 2009; Kord et al., 2010 ). Soil washing is particularly frequently used in soil
Logistical Simulation Modeling for Planning a .
This paper describes the development of a discrete event simulation model using the FlexSim software to support planning for soil remediation at Korean nuclear power plants that are undergoing decommissioning. Soil remediation may be required if site characterization shows that there has been radioactive contamination of soil from plant operations or the decommissioning process.
Simulation of soil washing with surfactants - .
01.04.1998 · Simulation of soil washing with surfactants. ... Surfactant soil washing using sodium dodecyl sulfate results in enhanced organic contaminant recovery that can be explained by mobilization of these organics due to the reduction in the oil–water interfacial tension and residual organic saturation.
Cited by: 64Laboratory studies of surfactant-enhanced .
Surfactant-enhanced Soil Washing using Tween and Tergitol Series Surfactants for Kuwait Soil Heavily Contaminated with Crude Oil. Journal of Soil and Groundwater Environment 2015, 20 (5), 26-33. DOI: 10.7857/JSGE.2015.20.5.026. Seiki Tanada, Naohito Kawasaki.
surfactant soil washing - sweetgirl1
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Enhanced Soil Washing of Phenanthrene by .
Increased desorption of hydrophobic organic compounds (HOCs) from soils and sediments is a key to the remediation of contaminated soils and groundwater. In this study, phenanthrene desorption from a contaminated soil by mixed solutions of a nonionic surfactant (octylphenol polyethoxylate, TX100) and an anionic surfactant (sodium dodecylbenzenesulfonate, SDBS) was investigated. Phenanthrene ...
CLU-IN | Technologies > Remediation > About .
Many terms have been used to describe in situ flushing techniques, such as soil flushing, water flooding, chemically enhanced solubilization for aquifer remediation, surfactant-enhanced aquifer remediation, and in situ soil washing. Soil flushing is sometimes confused with soil washing because both use aqueous solutions to mobilize contaminants, but flushing is conducted in situ, whereas soil ...
Remediation of PAH-Contaminated Soil by .
There is increasing concern regarding soils contaminated with polycyclic aromatic hydrocarbons (PAHs). In the present study, the remediation of soil spiked with PAHs was explored by the combination of soil washing with sodium dodecyl sulfate (SDS) and subsequent oxidation through persulfate (PS) activated by Fe2+, nanoscale zero-valent iron (nZVI), and SiO2-coated nZVI (SiO2/nZVI).
Wetting properties of biosurfactant (rhamnolipid) with ...
Keywords: biosurfactant, nonionic surfactant, surfactants mixtures, soil remediation. 1. INTRODUCTION While soil pollution by petrochemical products is widespread and frequent, many remediation technologies have been proposed for treating oil contaminated sites [1]. Soil washing, one of the remediation methods, has
Simulation of surfactant‐enhanced aquifer .
Kun Sang Lee, Numerical simulation of surfactant-enhanced remediation of heterogeneous aquifer contaminated with nonaqueous phase liquids, Journal of Material Cycles and Waste Management, 10.1007/s10163-010-0288-7, 12, 3, (193-203), (2010).
Remediation of phenanthrene contaminated soils .
A restricting factor for the full-scale application of soil washing technology is the cost of the surfactant (Liu et al. 2014a, b). Thus, lower TX100 concentrations could reduce surfactant cost. Furthermore, residual soil-sorbed surfactants may act as long-term pollutant sources for nearby ecosystems. Therefore, attempting to use surfactants ...
Optimization of aeration enhanced surfactant .
Surfactant-enhanced soil washing has been used for remediation of organic pollutants for an extended period, but its effectiveness and wide application was limited by the high concentration of surfactants utilized. In this work, the efficiency of conventional soil washing performance was enhanced by 12–25% through the incorporation of air bubbles into the low concentration surfactant soil ...
4-19 Soil Washing - FRTR
Description: Figure 4-19: Typical Soil Washing Process Ex situ soil separation processes (often referred to as "soil washing"), mostly based on mineral processing techniques, are widely used in Northern Europe and America for the treatment of contaminated soil. Soil washing is a water-based process for scrubbing soils ex situ to remove contaminants.
Diesel-Contaminated Soil Washing by Mixed .
25.06.2020 · Soil washing with surfactant solution is a method used to treat petroleum hydrocarbon contamination. The process relies on surfactant properties .
Remediation of Diesel Contaminated Soils Using Surfactants ...
Soil washing using surfactants was innovated for soils contaminated with oil hydrocarbons. Clay content of the soil is a significant factor in washing because interfacial tension of the surfactant and clay will decrease surfactant concentration. First, contaminated zone should be identified for in-situ washing since washing operation's efficiency is related to soil characteristics and ...
Effect of Ultrasound on Surfactant-Aided Soil Washing
Soil washing is a process of transferring contaminants from the soil phase to the water-based liquid phase and it has been used extensively. Soil washing with surfactants has been successfully1–4) employed to remove adsorbed or deposited organics including polychlorinated biphenyl and polycyclic aromatic hydrocarbon from soil.5) Surfactants
Effects of Surfactant on Geotechnical .
The effect of surfactant on treated soils is shown in Figure 8. The shear strength, C u values dropped from 319 kPa for untreated soil (0% surfactant) to 50 kPa for soil treated with 20% of surfactant (Table 5). Parks et al. (2006) also found that additional SdS decreased the undrained shear strength, C u of elastic modulus, E of kaolinite mixture