REMOVAL OF VOCS FROM GROUNDWATER USING MEMBRANE-ASSISTED SOLVENT-EXTRACTION

A membrane-assisted solvent extraction (MASX) system coupled to a memb rane-assisted distillation stripping (MADS) system for use in decontam inating ground-water is evaluated. Volatile organic compounds (VOCs) i n the groundwater are extracted in the MASX unit using a sunflower oil solvent. In the MADS unit, VOCs are stripped from the sunflower oil, which is recycled to the MASX unit. Thermodynamic data for the sunflow er oil-water-VOCs system were measured. The results were used along wi th published membrane mass-transfer data to design MASX and MADS modul es.