Über die Beziehungen zwischen der Konstitution und den Eigenschaften von Alkylbenzolsulfonaten mit jeweils einer geraden oder verzweigten Alkylkette bis zu 18 Kohlenstoff‐Atomen I

Griess, W.

doi:10.1002/lipi.19550570109

Cited by 43 publications

(1 citation statement)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The CMC values are estimated to be 13.8 mM for LAS C 8 , 7.1 mM for LAS C 9 , and 1.0 mM for LAS C 12 , respectively. These values are almost the same order as reported elsewhere by the dye method [23]: 10.6 mM for LAS C 8 and 1.2 mM for LAS C 12 , respectively. The relationship between CMC and maximum degradation rates of each LAS is shown in Fig.…”

Section: Methodssupporting

confidence: 89%

Effects of initial concentration of LASs on the rates of sonochemical degradation and cavitation efficiency

et al. 2009

View full text Add to dashboard Cite

The effect of initial concentration of linear alkylbenzene sulfonate (LAS: p-octylbenzene sulfonate (LAS C 8 ), p-nonylbenzene sulfonate (LAS C 9 ), p-dodecylbenzene sulfonate (LAS C 12 )) on the rate of sonochemical degradation was investigated over a wide concentration range under Ar atmosphere by 200 kHz ultrasonic irradiation. The degradation rate of each LAS increased with increasing initial concentration of LAS and then started to decrease with the different behavior depending on the types of LASs. This result indicated that the cavitation efficiency was gradually changed by their concentrations and the optimum LAS concentrations for their effective degradation existed. The maximum degradation rates were observed at 250 lM of LAS C 12 , 1250 lM of LAS C 9 , and 2500 lM of LAS C 8 , respectively. These optimum concentrations were found to be about four to six times smaller than these critical micelle concentrations (CMCs). It was also found that the maximum degradation rates at the optimum concentrations were observed to be almost linearly correlated with their CMCs. Based on the obtained results, it could be suggested that the micelle formation occurs in the interfacial region of cavitation bubbles during rectified diffusion and this phenomenon reduces the cavitation efficiency. In addition, from the results of the rate of the sonochemical degradation of LASs and the yield of hydrogen peroxide, the existence of thermal gradient in the interfacial region of cavitation bubbles was also confirmed.

show abstract

Section: Methodssupporting

confidence: 89%