Solvent extraction and soil washing treatment of contaminated soils from wood preserving sites: Bench‐scale studies

Sahle‐Demessie, Endalkachew; Grosse, Douglas; Bates, Edward

doi:10.1002/rem.3440100308

Cited by 17 publications

(13 citation statements)

References 26 publications

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“…In addition, the use of liquid propane with the extraction method has been reported by Tillman et al 10 This system can extract 98% of the PCBs from contaminated soil. Sahle-Demessie et al 11 used liquefied propane and dimethyl ether for the extraction of dioxins from a contaminated site. This method decreased the dioxins in the soil by 98.9%.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the optimal washing conditions for dioxin-contaminated soils from the circumference of an incinerator

Nakamiya

Furuichi

Ishii

2003

Journal of Material Cycles and Waste Management

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The optimal soil-washing conditions for dioxins were estimated on a soil sample from the circumference of an incinerator in Nose City, Osaka, Japan. The solvents ethanol, methanol, and acetone, together with a surfactant (100% of each) could extract 40% of the dioxins from contaminated soil at room temperature. From among these solvents, ethanol was chosen for a study on how to optimize the extraction conditions because of its low toxicity and its economic advantages. The time-course of the agitation showed that the extraction rate increased for 1 min, and thereafter the rate decreased. Therefore, the agitation time was fixed at 1 min. To estimate the effect of temperature on the extraction rate, the extraction temperature was changed. The amount of dioxins extracted was largest at the boiling point of ethanol (78.3°C), giving about 76% extraction. Furthermore, at this temperature, almost 100% of the dioxins in the contaminated soil were extracted when the ratio of water to ethanol was 20%.

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Section: Introductionmentioning

confidence: 99%

Evaluation of the optimal washing conditions for dioxin-contaminated soils from the circumference of an incinerator

Nakamiya

Furuichi

Ishii

2003

Journal of Material Cycles and Waste Management

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“…In the last decades, several studies were carried out to remove 9 inorganic and/or organic compounds from contaminated soil using 10 physical, biological and/or chemical processes [1][2][3][4][5]. Among the 11 chemical decontamination processes developed, the solubilization 12 of As, Cr, Cu, PCP and DF using alkaline solutions and a bio- 13 surfactant seemed to be very promising in terms of contaminant 14 removal efficiencies and operational costs.…”

Section: Introductionmentioning

confidence: 99%

Treatment of contaminated soil leachate by precipitation, adsorption and ion exchange

Reynier

Coudert

Blais

et al. 2015

Journal of Environmental Chemical Engineering

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“…In general, most organic compounds and some inorganic are bounded to the surface of clay, silt, sand, resulting in particular contamination of fine particles in the soil. [10] Several studies [11][12][13] have shown that these contaminants are mainly distributed and immobilized in the soil to 30 cm (for metals) and up to 60 cm (for PCP). The majority (90%) of these contaminants are located within 10 cm of the soil.…”

Section: Introductionmentioning

confidence: 99%

“…[28] Solubilization with organic solvents or surfactants showed good results. [10] The use of polar (methanol, ethanol, acetone, acetonitrile) or apolar (hexane, dichloromethane) solvents allows to obtain good extraction yields for organic contaminants, but is ineffective for metals. [5] Satisfactory PCP removal yields have been shown with the use of these two types of organic solvents.…”

Section: Introductionmentioning

confidence: 99%

“…Indeed, their results show that the addition of SDS (sodium dodecyl sulphate) at a concentration above its critical micelle concentration significantly improves the solubilization of PCP, while the non-ionic surfactant Triton X-100 inhibits the solubilization of this contaminant. According to Sahle-Demessie et al, [10] after two steps of 25 min in the presence of dimethyl ether at 48 • C, 95% of PCP and PCDD/F initially present in the soil are dissolved. However, this treatment is ineffective for metals.…”

Section: Introductionmentioning

confidence: 99%

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Decontamination of metals, pentachlorophenol, and polychlorined dibenzo-p-dioxins and dibenzofurans polluted soil in alkaline conditions using an amphoteric biosurfactant

Reynier

Blais

Mercier

et al. 2013

Environmental Technology

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In this paper, flotation in acidic conditions and alkaline leaching soil washing processes were compared to decontaminate four soils with variable contamination with metals, pentachlorophenol (PCP), and polychlorodibenzo dioxins and furans (PCDD/F). The measured concentrations of the four soils prior treatment were between 50 and 250 mg/kg for As, 35 and 220mg/kg for Cr, 80 and 350mg/kg for Cu, and 2.5 and 30mg/kg for PCP. PCDD/F concentrations reached 1394, 1375, 3730, and 6289ng/kg for F1, S1, S2, and S3 soils, respectively. The tests were carried out with masses of 100g of soil (fraction 0-2 mm) in a 2 L beaker or in a 1 L flotation cell. Soil flotation in sulphuric acid for 1 h at 60 degreeC with three flotation cycles using the surfactant cocamidopropyl betaine (BW) at 1% allows the solubilization of metals and PCP with average removal yields of 85%, 51%, 90%, and 62% for As, Cr, Cu, and PCP, respectively. The alkaline leaching for 2 h at 80 degreeC solubilizes As, Cr, Cu, and PCP with average removal yields of 60%, 32%, 77%, and 87%, respectively. Tests on PCDD/F solubilization with different surfactants were carried out in combination with the alkaline leaching process. PCDD/F removal yields of 25%, 72%, 70%, and 74% for F1, S1, S2, and S3 soils, respectively, were obtained using the optimized conditions.

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Solvent extraction and soil washing treatment of contaminated soils from wood preserving sites: Bench‐scale studies

Cited by 17 publications

References 26 publications

Evaluation of the optimal washing conditions for dioxin-contaminated soils from the circumference of an incinerator

Evaluation of the optimal washing conditions for dioxin-contaminated soils from the circumference of an incinerator

Treatment of contaminated soil leachate by precipitation, adsorption and ion exchange

Decontamination of metals, pentachlorophenol, and polychlorined dibenzo-p-dioxins and dibenzofurans polluted soil in alkaline conditions using an amphoteric biosurfactant

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