Aqueous chemistry and interactive effects on non-ionic surfactant and pentachlorophenol sorption to soil
| Autor: | Sung-Kil Park, Angela R. Bielefeldt |
|---|---|
| Rok vydání: | 2003 |
| Předmět: |
Insecticides
Environmental Engineering Pentachlorophenol Environmental remediation chemistry.chemical_compound Surface-Active Agents Desorption Soil Pollutants Organic matter Waste Management and Disposal Water Science and Technology Civil and Structural Engineering chemistry.chemical_classification Chromatography Ecological Modeling Sorption Hydrogen-Ion Concentration Pollution Soil contamination Partition coefficient chemistry Ionic strength Environmental chemistry Adsorption Environmental Pollution |
| Zdroj: | Water research. 37(19) |
| ISSN: | 0043-1354 |
| Popis: | Non-ionic surfactant addition was investigated as a method to remediate pentachlorophenol (PCP) contaminated soil. The goal was to quantify surfactant (Tergitol NP-10 (TNP10)) and PCP sorption to soil and their interactive effects under varying pH, ionic strength, and soil conditions. Up to 16,700 mg/kg of TNP10 partitioned to soil, with increasing sorption far above the critical micelle concentration (CMC) and with greater amounts of PCP present. Approximately 40-45 times more TNP10 and 20-30 times more PCP sorbed to the finer soil with higher organic matter content. Aqueous TNP10 concentrations well above the CMC (>/=5500 mg/L) were required to enhance PCP desorption from the soil. As pH increased by 0.5-0.85 units, TNP10 sorption decreased by 14-25% and PCP sorption as measured by the log of the equilibrium partition coefficient decreased by 1-1.5. A lower ionic strength of 0.03 versus 0.112 M increased PCP desorption from contaminated soil by 5-17% in the presence of TNP10. This work is relevant to designing ex situ soil washing or surfactant-aided PCP remediation. |
| Databáze: | OpenAIRE |
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