Study of Solubility Efficiency of Polycyclic Aromatic Hydrocarbons in Single Surfactant Systems

Abstract

Water solubility enhancements of two polycyclic aromatic hydrocarbons i.e., naphthalene (Naph) and anthracene (Anth) in single surfactants system have been measured by UV–VIS‐Spectrophotometer. The relationships between solubilizing capacity and their solubilization efficiency towards polycyclic aromatic hydrocarbons (PAH) have been quantified and discussed in terms of the molar solubilization ratio (MSR), the micelle‐water partition coefficient (Km) and standard free energy of solubilization (ΔG°s). The micellar and surface properties of some cationic and anionic surfactants have been investigated by conductivity, surface tension and fluorescence measurements at 300 K. Above the CMC, maximum solubilization occurs in cationic surfactants where as the solubilization is least in the presence of anionic surfactants. The negative value of ΔG°s shows spontaneity of the solubilization process. The MSR values are larger in naphthalene than anthracene (Naph > Anth). The present studies provide valuable information for the selection of surfactants for solubilizing water‐insoluble compounds.

Effect of Polar Organic Solvents on Self‐Aggregation of Some Cationic Monomeric and Dimeric Surfactants

“…The CMC values obtained from the conductivity method are in good agreement with the surface tension and fluorescence methods. The experimental CMC values are in close agreement with published literature data [24,28,[37][38][39][40]54]. It is observed that an increase in the amount of EG and DEG increases the degree of ionization for all the studied surfactants.…”

Solubilization of polycyclic aromatic hydrocarbons in structurally different gemini and monomeric surfactants: A comparative study

“…The lower the CMC value, the higher the solubilizing power. Surfactants with lower CMC values possess greater solubilizing efficiency [27]. We have already reported the CMC of investigated gemini and monomeric cationic surfactants in aqueous solution in Table 2 [27,44,45].…”

“…The concentration of hydrophobic compounds increases with the addition of surfactants in the water phase by solubilization or emulsification [24,25]. In recent years, a considerable amount of research has been conducted on the SER of PAHs [26][27][28][29][30][31]. Most of the work on surfactant solubilization of hydrophobic organic compounds (HOCs) has focused on the conventional monomeric anionic, cationic and nonionic surfactants.…”

“…The study revealed that the anionic surfactant poses lower solubilization capacity than cationic surfactants. Our research group [27,28] has also been documented the solubility efficiency of various PAHs in conventional and mixed gemini surfactant systems. Recently we have examined the solubilizing capacity of variety of single cationic surfactants along with their combinations with gemini surfactants for different PAHs (naphthalene, anthracene and pyrene) and found mixed system more efficient than the single [27,28].…”

Kationos felületaktív anyag (hexadecilpiridinium-klorid monohidrát) adszorpciója talajokon

“…Ezt a tenzidet ugyanis a 60-as évek-től kezdve használták a talajok, illetve üledékek fajlagos felületének gyors meghatá-rozására, így különösen sokat vizsgálták a CPB adszorpciójára ható talaj-és talajás-ványtani tulajdonságokat ARINGHIERI & SEQUI, 1978;MAYER & ROSSI, 1982). A két vegyületet az adszorpcióban főszerepet játszó azonos kation miatt gyakran együtt jellemzik, mint vegyület-csoportot (cetilpiridinium-halogenidek -CPH) (LAKRA et al, 2013), így a továbbiakban mi is összevontan mutatjuk be a két tenzid talajokon történő adszorpciójának törvénysze-rűségeit tárgyaló kutatási eredményeket.…”