Jd. Rouse et al., MICELLAR SOLUBILIZATION OF UNSATURATED HYDROCARBON CONCENTRATIONS AS EVALUATED BY SEMIEQUILIBRIUM DIALYSIS, Environmental science & technology, 29(10), 1995, pp. 2484-2489
Prior research on surfactant solubilization has emphasized steady-stat
e conditions in the presence of excess hydrocarbon for single-componen
t systems. These conditions do not accurately emulate the natural subs
urface environment. Evaluation of solubilization potential for unsatur
ated hydrocarbon concentrations revealed influences of micellar core a
nd palisade layer effects on hydrocarbons of varying polarity, Naphtha
ne, naphthalene, and l-naphthol were utilized to probe for core and pa
lisade effects. Surfactants evaluated were sodium dodecyl benzenesulfo
nate and C16-alkyl diphenyl oxide disulfonate. Use of semiequilibrium
dialysis cells provided quantitative solubilization information for un
saturated hydrocarbon concentrations. Palisade and core solubilization
effects were observed as follows: as the more fraction increased, K-m
increased for naphthane, decreased for naphthol, and remained relativ
ely constant for naphthalene.