Solubilization and degradation of perchloroethylene (PCE) in cationic andnonionic surfactant solutions
Sivaram Harendra , Cumaraswamy Vipulanandan
DOI:
Received October 05, 2010,Revised February 16, 2011, Accepted , Available online
Volume 23,2011,Pages 1240-1248
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Solubilization of perchloroethylene (PCE) in a nonionic (Triton X-100) and a cationic (cetyltrimethylammonium bromide (CTAB))
surfactant solutions and the degradation of surfactant solubilized PCE using fine to nanosize Fe and bi-metallic Fe-Ni particles were
investigated. Micelle partition coefficients (Km) and molar solubility ratio (MSR) for PCE in 10 g/L of surfactant solutions have been
quantified and the solubility of PCE (100 mg/L in water) in the surfactant solutions increased by about ten fold. Of the two surfactants
studied, Triton X-100 solubilized the higher amount of PCE per gram of surfactant. To degrade solubilized PCE, both iron and bimetallic
Fe-Ni particles were used in continuously stirred batch reactors. The iron and bi-metallic particles were synthesized using the
solution method and the particles were characterized using the SEM, EDS, TEM and XRD. The PCE solubilized up to 500 mg/L in
both surfactant solutions were totally degraded at various rates by 200 g/L of bi-metallic Fe-Ni particles in less than 20 hr, which is the
highest concentration of PCE degraded in the shortest time compared to data in the literature. The degradations of PCE solubilized in
surfactant solutions were represented by nonlinear kinetic relationships which depended on the type of surfactant used for solubilizing
the PCE.
