Surfactant recycling by solvent extraction in surfactant-aided remediation

摘要: As a part of the study on surfactant-aided remediation organic contaminants, solvent extraction was investigated to determine its efficiency for used surfactant recycling. The experiments glass column 70 cm height with an internal diameter 3 cm. convex orifice four holes (4 mm outer diameter) installed at base column. Four percent aqueous solutions solubilizing toluene or 1,2,4-trichlorobenzene (TCB) as model contaminants were injected in Acetone, hexane, and methylene chloride solvent, allowed flow upward through solution circulated by pump. Toluene 1,2,4-TCB effectively removed from anionic diphenyl oxide disulfonate (DOSL, trade name Dowfax 8390) using hexane solvent. times required 98% removal 5 h rates 30 ml/min. This indicates that present method may help recycle contaminated soil.