hydrocarbon soil washing amp surfactant flushing
hydrocarbon soil washing ampamp surfactant flushing
Soil flushing is one of the soil remediation technologies which could by applied for treatment of hydrocarbon contaminated soil. Flushing of the contaminated soil samples was carried out by using sodium dodecyl sulfate (SDS) and Triton X-100 surfactant solutions at the concentrations of 0.1%, 0.2%, 0.3%, and 0.4% (W/W).Онлайн-запрос
EFFECT OF SOIL WASHING ON PETROLEUM- HYDROCARBON
Key words: soil washing, petroleum hydrocarbons, surfactant, humic acids, SEM INTRODUCTION Soil washing and flushing have been proposed as possible remediation technologies for soils contaminated by petroleum hydrocarbons and other hydrophobic organic chemicals (Nash, 1987; Nash and Traver, 1988; Nunno et al., 1988; Esposito et al., 1989; Pheiffer, 1990). The effective-ness of soil washingОнлайн-запрос
Soil Washing Potential of a Natural Surfactant
27/02/1997· 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. These promising results warrant further research to establish the usefulness of plant-based surfactants for soil washing applications.Онлайн-запрос
Removing of hydrocarbon contaminated soil via air
The removal of poured waste lubricant oils from soil using air flushing with and without surfactant were carried out using laboratory scale model. The effects of surfactant concentrations, water washing cycles and washing time were also studied. The results discussed based on application of surfactant enhancing air-sparging technique as the most suitable and cheapest remedial technology for removal of oilОнлайн-запрос
Potential benefit of surfactants in a hydrocarbon
15/06/2012· Soil washing is an ex situ soil remediation treatment process. The purpose of soil washing is to clean the major gravel and sand fractions, concentrating contamination into the fine silt and clay fractions. The addition of surfactants can improve the efficiency of this method. Here we report the use of UV fluorescence spectroscopy to assess the hydrocarbon cleaning process as a rapid and
Surfactant-Enhanced Washing of Soils Contaminated with
Keywords: Wasted Automotive Oils; Surfactants; Soil Washing; Waste Water 1. Introduction The restoration of soil contaminated with hydrocarbons is often difficult and complex due, among other, to the adsorption on the soil matrix and the low solubility of these contaminants. It has been demonstrated that the more insoluble in water is the contaminant, the longer it remains in the soil matrixОнлайн-запрос
Surfactant Enhanced Washing Of Soil Contaminated With
The wastewater contained petroleum hydrocarbons, surfactants, and other compounds that leached during the soil washing process. The efficiency of the biological treatment using natural or synthetic surfactants on the hydrocarbon-contaminated soil washing process, and different operation temperatures (24, 28, and 32°C) were compared and the identification of the microbial consortiumОнлайн-запрос
hydrocarbon soil washing amp surfactant flushing
Hydrocarbon soil washing amp amp surfactant flushing. A soil washing process using froth flotation technique was evaluated for the removal of arsenic, cadmium, copper, lead, and zinc from a highly contaminated urban soil brownfield after crushing of the particlesize fractions amp;gt;250microm The metal contaminants were in particulate forms and distributed in all the particlesize fractions.Онлайн-запрос
The influence of clay minerals and surfactants on
15/02/2016· Therefore, more cases that use anionic surfactants, rather than cationic surfactants, for soil washing or aquifer flushing have been reported . Especially, washing process with surfactant gave stable emulsions that could not be broken by salt addition, such as Triton X-100 . Nonionic surfactants show a greater ability to enhance the solubilization of petroleum hydrocarbon. However, recent experiments have indicated that although nonionic surfactants
hydrocarbon soil washing amp surfactant flushing
mobile crushers amp crushing screening washing grinding equipment in stationary hydrocarbon soil washing amp surfactant flushing . Get Price ; Patent US7323014Down the drain cleaning . contacting fabric articles in need of cleaning in an automatic washing machine with a cleaning composition wash medium comprising a lipophilic fluid and contaminants . Get Price; a citizen s guide to soilОнлайн-запрос
EFFECT OF SOIL WASHING ON PETROLEUM- HYDROCARBON
Key words: soil washing, petroleum hydrocarbons, surfactant, humic acids, SEM INTRODUCTION Soil washing and flushing have been proposed as possible remediation technologies for soils contaminated by petroleum hydrocarbons and other hydrophobic organic chemicals (Nash, 1987; Nash and Traver, 1988; Nunno et al., 1988; Esposito et al., 1989; Pheiffer, 1990). The effective-ness of soil washingОнлайн-запрос
Removing of hydrocarbon contaminated soil via air
The removal of poured waste lubricant oils from soil using air flushing with and without surfactant were carried out using laboratory scale model. The effects of surfactant concentrations, water washing cycles and washing time were also studied. The results discussed based on application of surfactant enhancing air-sparging technique as the most suitable and cheapest remedial technology for removal of oilОнлайн-запрос
Soil Washing Potential of a Natural Surfactant
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. These promising results warrant further research to establish the usefulness of plant-based surfactants for soil washing applications.Онлайн-запрос
Soil Decontamination by Soil Washing Technique Using
Hydrocarbons not only affect the quality of soil but also changes its geotechnical properties. This paper aims to investigate the effect of geotechnical properties of soil contaminated with engine oil and evaluate decontamination by soil washing technique using surfactant Brij-35. The geotechnical properties of contaminated soil samples by different proportion of engine oil i.e 2%, 4%, 6% & 8%Онлайн-запрос
The influence of clay minerals and surfactants on
15/02/2016· Therefore, more cases that use anionic surfactants, rather than cationic surfactants, for soil washing or aquifer flushing have been reported . Especially, washing process with surfactant gave stable emulsions that could not be broken by salt addition, such as Triton X-100 . Nonionic surfactants show a greater ability to enhance the solubilization of petroleum hydrocarbon. However, recent experimentsОнлайн-запрос
Soil Flushing an overview | ScienceDirect Topics
Typical soil flushing solutions include water, dilute acids and bases, complexing and chelating agents, reducing agents, solvents, and surfactants. The fluids are introduced through spraying, surface flooding, subsurface leach fields, and subsurface injection. In some cases, steam has been used as the fluid in soil flushing applications. The steam is injected into the subsurface through a ring of injection wellsОнлайн-запрос
Soil washing, ozofractionation and metal sequestration
Keywords: soil washing, surfactant, flushing solution, ozofractionation, sequestration 1. Introduction Washing contaminated soil with freshwater in agitated mixers to liberate inorganic species, such as lead and zinc, has been widely documented in the last 20 years (Abumaizar & Smith, 1999, Dermont et al., 2008; Mann, 1999); this practice is particularly common in mine site remediation (e.gОнлайн-запрос
Fenton Oxidation of Polycyclic Aromatic Hydrocarbons
06/07/2004· The feasibility of using a combination of two well-studied technologies soil washing and Fenton oxidation to remove polycyclic aromatic hydrocarbons (PAH) from soil and subsequently destroy them in the resulting waste water solution was investigated. Three well-characterized New Jersey soils, representing a wide range of organic carbon content, were artificially contaminated with a mixture ofОнлайн-запрос
Enhanced Soil Flushing for Simultaneous Removal of PAHs
03/07/2011· The 0.2 M EDTA flushing solution removed approximately 25–75% of the toxic heavy metals found in the soil. None of the PAHs were removed from the soil when deionized water and EDTA were the flushing solutions. The PAHs removal efficiencies in the Igepal and HPCD systems decreased as the hydraulic gradient decreased. However, the surfactantОнлайн-запрос
In Situ Flushing with Surfactants and Cosolvents
1.2 Surfactants and Cosolvents In situ flushing is commonly applied to contaminated sites using surfactants or cosolvents as the primary flushing agents. Surfactants (surface-active-agents) are chemical compounds frequently used in detergents and food products that alter the properties of solution interfaces. SurfactantsОнлайн-запрос
Soil Washing Potential of a Natural Surfactant
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. These promising results warrant further research to establish the usefulness of plant-based surfactants for soil washing applications.Онлайн-запрос
Soil washing, ozofractionation and metal sequestration
Stage 1 followed these steps: place a sub-sample in a concrete mixer; add 50 L of fresh water; add 50 mL of sodium lauryl sulfate (CH3(CH2)11OSO3Na) as an anionic surfactant; mix for 20 minutes; decant flushing solution and store; repeat for each sub-sample; retain andОнлайн-запрос
The application of soil washing for treatment of
Polycyclic aromatic hydrocarbons (PAHs) are potential carcinogenic and hazardous compounds having raised appreciable environmental concerns around the world in recent decades. This research investigates the effect of soil washing on removal of PAHs in contaminated soil. The study was conducted by collecting soil samples from a petrochemical complex in south of Iran. Testing was carried out atОнлайн-запрос
Remediation of Hydrocarbon Contaminated Soils
Soil Washing Description: this technique, generally carried out on site, consists in the soil decontamination by washing with water and possible addition of other substances (chelating agents, surfactants, acids or bases), according to the needs, in order to improve the ‘solid-liquid extraction in contact with the ground. The latter undergoes an initial pre-treatment to remove coarseОнлайн-запрос
Joint chemical flushing of soils contaminated with
over, second pollution of surfactant from washing powder often occurs to the soils (Zhou and Song, 2004). More studies are needed to increase the efficiency of soil flushing technology and decrease the dosage of surfactant and expenses of contaminated soil treatment. 2. Materials and methods 2.1. Tested soils Soil contaminated with highОнлайн-запрос
THE USE OF MICROEMULSION AND FLUSHING SOLUTIONS TO
The need to remediate hydrocarbon-contaminated sites has led to the development of numerous technologies. Among these technologies one cites the use of: bioremediation, thermal desorption, soil vapor extraction, soil washing, soil flushing, and electrokinetic soil remediation (Virkutyte et al., 2002). Soil flushing by surfactant solutions to remove NAPLs is a technique currently used (OuyangОнлайн-запрос
In Situ Flushing with Surfactants and Cosolvents
1.2 Surfactants and Cosolvents In situ flushing is commonly applied to contaminated sites using surfactants or cosolvents as the primary flushing agents. Surfactants (surface-active-agents) are chemical compounds frequently used in detergents and food products that alter the properties of solution interfaces. SurfactantsОнлайн-запрос
Enhanced Soil Flushing for Simultaneous Removal of PAHs
03/07/2011· The 0.2 M EDTA flushing solution removed approximately 25–75% of the toxic heavy metals found in the soil. None of the PAHs were removed from the soil when deionized water and EDTA were the flushing solutions. The PAHs removal efficiencies in the Igepal and HPCD systems decreased as the hydraulic gradient decreased. However, the surfactant-enhanced systems were more efficientОнлайн-запрос
Simulation Of Soil Washing With Surfactants
Simulation of soil washing with surfactants hydrocarbon soil washing amp surfactant flushing simulation of soil washing with surfactants surfactant flushing surfactant soil washing using sodium dodecyl sulfate results in enhanced organic tutorial soil washing elettrostar . Details ; Surfactant Selection For Enhancing Ex Situ. Anionic and nonionic surfactants were evaluated for the enhancedОнлайн-запрос
INDOT Guidance Document for
Contrast to soil washing, which involves excavating the contaminated soil and treating it at the surface in a soil washer, soil flushing involves an injection/recirculation process in place. Traditional pump-and-treat methods are ineffective at . 6 locations that contain significant amounts of water-immiscible solvents, precipitated metals, contaminants that have diffused into small pore
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