title: Effects of mixed surfactants on the volatilization of naphthalene from aqueous solutions.
abstract: The effects of mixed anionic-nonionic surfactants, Tween40-SDS (sodium dodecyl sulfate), Tween40-SDBS (sodium dodecylbenzene sulfonate), Tween20-SDS and Tween20-SDBS, on the solubility and volatilization of naphthalene from static aqueous solutions were investigated. The experiment results indicated that mixed anionic-nonionic surfactants can solubilize naphthalene synergistically, which was resulted from the reduction in critical micelle concentration (CMC) of the mixed surfactant and the increase in micellar partition coefficient (K(mc)) of naphthalene between micelles and aqueous phase. The synergistic effects of mixed surfactants resulted in further reduction in volatilization of naphthalene than that induced by single surfactant. A positive linear correlation was found between the synergistic solubilization ratio (DeltaS) and the synergistic inhibitory capacity on naphthalene volatilization (DeltaC) in the presence of mixed surfactants. Results from this study imply that mixed surfactants can be employed in environmental remediation to formulate the needed solubility and volatilization of volatile and semivolatile compounds in aqueous solutions.
authors.affiliation: Department of Environmental Science, Zhejiang University, Hangzhou 310028, China. shenxueyou@zju.edu.cn
authors.forename: Xueyou
authors.initials: X
authors.lastname: Shen
authors.forename: Yanli
authors.initials: Y
authors.lastname: Sun
authors.forename: Zhanyu
authors.initials: Z
authors.lastname: Ma
authors.forename: Ping
authors.initials: P
authors.lastname: Zhang
authors.forename: Chunlong
authors.initials: C
authors.lastname: Zhang
authors.forename: Lizhong
authors.initials: L
authors.lastname: Zhu
mesh_terms: D004787:Environmental Pollution / Q000517:prevention & control*; D008823:Micelles; D009281:Naphthalenes / Q000737:chemistry / Q000302:isolation & purification*; D012995:Solubility; D012996:Solutions; D013501:Surface-Active Agents / Q000737:chemistry*; D014835:Volatilization; D014867:Water
chemical_list: D008823:Micelles; D009281:Naphthalenes; D012996:Solutions; D013501:Surface-Active Agents; D014867:Water; C031721:naphthalene