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Enhanced soil remediation via plant-based surfactant compounds from acanthophyllum laxiusculum

Soltaninejad, H ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.3139/113.110453
  3. Publisher: Carl Hanser Verlag
  4. Abstract:
  5. In the present study, an aqueous root-extract of Acanthophyllum laxiusculum (AREAL) was evaluated for phenanthrene removal from two samples of contaminated soil. AREAL showed a linear solubilization enhancement for phenanthrene with a weight solubilization ratio of 0.05. Batch soil washing experiments caused the removal of phenanthrene with efficiencies of 96.7% and 78% from soils with 0.78% and 2.73% organic carbon, respectively. Desorption kinetics of phenanthrene exhibited a twophase pattern, namely, a rapid release as the initial phase and a slower removal as a subsequent phase. A two-compartment exponential model could adequately represent the two phases of the kinetic pattern of phenanthrene desorption. The rise of pH from acidic to basic levels, decreased phenanthrene removal due to changes in the micelle number of the surfactant phase. Maximum achievable yield of removal was 82% phenanthrene in a column experiment at defined operational conditions. High removal efficiencies show the potential application of AREAL for improving the bioremediation of polycyclic aromatic hydrocarbons (PAHs) from contaminated soils
  6. Keywords:
  7. Soil washing ; Two-compartment model ; Anthracene ; Aromatic hydrocarbons ; Bioremediation ; Carbon ; Desorption ; Efficiency ; Organic carbon ; Pollution ; Soil conservation ; Soils ; Solubility ; Surface active agents ; Washing ; Desorption kinetics ; Operational conditions ; Phenanthrene ; Polycyclic aromatic hydrocarbons (PAHS) ; Removal efficiencies ; Soil pollution control
  8. Source: Tenside, Surfactants, Detergents ; Volume 53, Issue 4 , 2016 , Pages 324-331 ; 09323414 (ISSN)
  9. URL: http://www.hanser-elibrary.com/doi/10.3139/113.110453