Adsorption Characteristics of Ionic Surfactants at Water/Hexane Interface Obtained by PAT and ODBA
N. MucicVincent PradinesAliyar JavadiAltynay SharipovaJ. KrägelMartin E. LeserE.V. AksenenkoV. B. FainermanR. Miller
1
Citation
30
Reference
10
Related Paper
Citation Trend
Keywords:
Hexane
Interface (matter)
Hexane
BET theory
Specific surface area
Cite
Citations (7)
The adsorption of pyidine and N,N dimethylanil ine by a phenolic resin adsorbent JDW 2 in nonaqueous systems was investigated under static conditions. Experimental results indicated that the dominating mechanism of adsorption of py ridine and N,N dimethylaniline by the adsorbent in hexane is a hydrog en bonding sorption process.The equilibriu m sorption date for adsorbent JDW 2/pyridine (or JDW 2/N,N dimethylan iline) systems in hexane showed good agreement with the Langmuir isotherm equation.T he correlation coefficients are larger than 0 99. It implies that the sorption of pyridine and N,N dimethylaniline onto the adsorbent in hexane systems is a monomolecular sorption.The influence of ethanol and ethyl acetate concentra tions in hexane solutions on the adsorption of pyidine and N,N dimethylanil ine was also studied.
Hexane
Dimethylaniline
Langmuir adsorption model
Langmuir equation
Cite
Citations (0)
The selective adsorption isotherms of the n-C6, C8, C12, C14 and C16 fatty acids at the silica/benzene and silica/n-hexane interface have been determined at 27°C. The adsorbents used were a fully hydroxylated silica carrying a small concentration of micropores on its surface (R.A.3) and an annealed but still fully hydroxylated silica (R.R.A.3/700). With the exception of the C6 and C8 acids the adsorption isotherms with the benzene solutions were independent of the chain length of the fatty acid. Adsorption from the n-hexane solutions showed that lengthening the hydrocarbon chain of the adsorbate decreased the surface coverage at fixed equilibrium solution concentration. The adsorption isotherms obtained from benzene solutions showed a limiting surface coverage equivalent to about 0.5 molecule of fatty acid per 100 Å2 of adsorbent surface for the C8-C16 acids. From the n-hexane solutions the limiting adsorption ranged from about 1.85 solute molecules per 100 Å2 of solid surface for the C6 acid down to 1.40 for the C16 species. Partly dehydroxylating the adsorbent so as to yield a silica surface carrying only single hydroxyls (R.A.3/700) resulted in this material showing virtually no selectivity for fatty acid adsorption from benzene solutions.
Hexane
Limiting
Cite
Citations (18)
Zeolitic imidazolate framework
Hexane
Imidazolate
Selective adsorption
Cite
Citations (6)
Hexane
Sample Preparation
Enzymatic Hydrolysis
Cite
Citations (47)
Scrap tire rubber particles were used and evaluated to adsorb some gaseous volatile organic compounds (VOCs), such as benzene and n-hexane. The results present that the adsorption capacities were 0.18 and 0.072 mg/g for n-hexane and benzene, respectively, in the static adsorption mode; the effective adsorption may be attributed to the carbon black of the tire. The adsorption process is in accordance with the Freundlich isothermal model and Lagergren pseudo-first-order kinetic equation. Correspondingly, the adsorption process is multilayer adsorption analyzed by the intramolecular diffusion model. In the dynamic adsorption mode, the maximum adsorption efficiencies of n-hexane and benzene were 80.7 and 81%, respectively, at flow velocities of 0.1 L/min n-hexane and 0.2 L/min benzene.
Hexane
Isothermal process
Cite
Citations (0)
Hexane adsorption on single-walled carbon nanotube (SWNT) bundles is studied by both simulation and experimentally using a previously developed computer-aided methodology, which employed a smaller physisorbed probe molecule, nitrogen, to explore the porosity of nanotube samples. Configurational-bias grand canonical Monte Carlo simulation of hexane adsorption on localized sites of the bundles is carried out to predict adsorption on their external surface and in their internal sites. These localized isotherms are then combined into a global isotherm for a given sample by using knowledge of its tube-diameter distribution and structural parameters, such as the fraction of open-ended nanotubes and the external surface area of bundles in samples, which have been independently determined from the standard nitrogen adsorption isotherm. The near-perfect replication of experimental isotherms demonstrates the validity of our method for structural characterization of SWNT samples. The effect of temperature on adsorption is also studied and the simulation results are extrapolated to predict the limiting hexane adsorption capacity of the samples. The similarity between the hexane adsorption isotherms and those of other organic molecules demonstrates that the adsorption mechanisms explored here are not specific to hexane, and that the proposed methodology can be potentially applicable to other sorbates with equal success.
Hexane
Carbon fibers
Cite
Citations (100)
Hexane
Carbon fibers
Cite
Citations (3)
The nationally-recognized Susquehanna
Chorale will delight audiences of all
ages with a diverse mix of classic and
contemporary pieces. The ChoraleAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂA¢AÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂs
performances have been described
as AÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂA¢AÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂemotionally unfiltered, honest
music making, successful in their
aim to make the audience feel,
to be moved, to be part of the
performance - and all this while
working at an extremely high
musical level.AÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂA¢AÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂAÂA Experience choral
singing that will take you to new
heights!
Cite
Citations (0)
A difference in adsorption characteristics of β-carotene between one component (β-carotene) and two components (β-carotene and constant concentration of triolein) in n-hexane solution was investigated in order to elucidate the inhibition effect of triolein on β-carotene adsorption by attapulgites and sepiolites. The adsorption rate of triolein was faster than that of β-carotene in the two components hexane solution. The amount of β-carotene adsorbed per minitue at the very beginning of adsorption decreased to approximately 1/2-1/3 of that in the one component hexane solution. A decrease in the amount of triolein desorbed in hexane suggests that small number of adsorbed triolein were covered with β-carotene adsorption and that the rest of adsorbed triolein was independent of adsorption sites of β-carotene on adsorbent. Adsorption isotherms of β-carotene in the two components hexane solution were a typical Langmuir type in which the plot of adsorbed amount against the residual concentration gives a flat curve. Triolein adsorption capacity of adsorbent was proportional to the decrease in the amount of adsorbed β-carotene and this fact indicates that one molecule triolein adsorption inhibits 0.84 molecule β-carotene adsorption.
Triolein
Hexane
Carotene
Cite
Citations (0)