Remediating pesticide contaminated soils using solvent extraction

Sahle‐Demessie, Endalkachew; Meckes, Mark C.; Richardson, Teri L.

doi:10.1002/ep.670150420

Cited by 10 publications

(4 citation statements)

References 9 publications

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“…Co-solvents such as methanol, propanol, etc. in soil washing have not been practical because of the requirement of large amounts of co-solvent, disposal of the co-solvent, and the need to separate contaminant from the used co-solvent (Juhasz et al 2002;Sahle-Demessie et al 1996). An audible lowfrequency ultrasound-enhanced, patented soil washing process has been reported for polychlorinated biphenyl contaminated soil (Mason et al 2004).…”

mentioning

confidence: 99%

Ultrasonic Enhanced Desorption of DDT from Contaminated Soils

Thangavadivel

Megharaj

Smart

et al. 2010

Water Air Soil Pollut

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In this study, using high-power lowfrequency ultrasound, heated slurries with anionic surfactant sodium dodecyl sulfate (SDS) were treated to enhance desorption of DDT from soils with high clay, silt, and organic matter content and different pH (5.6-8.4). The results were compared with DDT extracted using a strong solvent combination as reference. Slurry ranges from 5 to 20 wt.% were studied. For a soil slurry (10 wt.%) at pH 6.9 with 0.1% v/v SDS surfactant heated to 40°C for 30 min, desorption was above 80% in 30 s using 20 kHz, 932 W/L ultrasonic intensity without solvent extraction. Other soils gave lower desorption efficiency in the range 40-60% after 30 s ultrasonic treatment. The percentage of organic matter, dissolved organic carbon, soil surface area, clay and silt percentage, and soil pH level were the key parameters influencing variations in desorption of DDT in the three soils in similar experimental conditions. DDT dissolution in SDS and soil organic matter removal employing the ultrasonic-enhanced organic matter roll-up mechanism emerged as the two best possible methods of DDT desorption. The method offers a practical, potentially low-cost alternative to high volume, costly, hazardous solvent extraction of DDT.

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confidence: 99%

Ultrasonic Enhanced Desorption of DDT from Contaminated Soils

Thangavadivel

Megharaj

Smart

et al. 2010

Water Air Soil Pollut

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“…The effectiveness of solvent extraction for remediating soils contaminated by PCBs, pesticides, and other hydrocarbons has been demonstrated (Sahle-Demessie et al, 1996;US EPA, 1995b;1993b). However, the application of solvent extraction technology for wood preserving sites and measuring its efficacy in treating soils with high levels of dioxins, PAHs, and PCP has not been systematically investigated.…”

Section: Solvent Extraction Overviewmentioning

confidence: 98%

“…Properties of solvents that are important are dissolving power, cost, volatility, flammability, surface tension, and heat of vaporization. Additionally, the solvent used must not be a US EPA listed hazardous waste.The effectiveness of solvent extraction for remediating soils contaminated by PCBs, pesticides, and other hydrocarbons has been demonstrated(Sahle-Demessie et al, 1996;US…”

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confidence: 99%

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

Sahle‐Demessie

Grosse

Bates

2000

Remediation Journal

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“…Methanol was utilized as the solvent, maintaining a ratio of 1.6 parts methanol to soil.This solvent extraction technique reduces pesticide concentrations in soil by more than 99% while also reducing the amount of material required for further extraction by 25%. 19 Fig. 1: Soil washing process for treatment of polluted soils.…”

Section: Solvent Extractionmentioning

confidence: 99%

Pesticide Soil Pollution: An Overview about Advantages and Disadvantages of Different Remediation Technologies

Shit,

Bhattacharjee,

Chakravorty

et al. 2023

Curr. World Environ

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The use of pesticides presents a looming danger to the living elements of our ecological system, crops, and the well-being of our species. As an outcome, various organic contaminants pollute the soil. Different physical, chemical, and biological remediation techniques have been employed for the decontamination of pesticide-polluted soils. Remediation technology should always be affordable, on-site or in-situ, and capable of restoring the soil's natural functionality. The presence of multiple pesticides can pose challenges in effectively remediating them from the soil. The present work examines the scientific literature on the benefits and drawbacks of various existing and emerging soil remediation techniques. Customized technology choices and designs for specific site conditions enhance the effective cleanup of polluted areas. The present study, which evaluates and contrasts various technological approaches, shall serve as an invaluable tool for determining the optimal soil remediation method for a given contamination dilemma.

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Remediating pesticide contaminated soils using solvent extraction

Cited by 10 publications

References 9 publications

Ultrasonic Enhanced Desorption of DDT from Contaminated Soils

Ultrasonic Enhanced Desorption of DDT from Contaminated Soils

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

Pesticide Soil Pollution: An Overview about Advantages and Disadvantages of Different Remediation Technologies

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