Simultaneous elimination of dissolved and dispersed pollutants from cutting oil wastes using two aqueous phase extraction methods

Talbi, Z.; Haddou, Boumediene; Bouberka, Zohra

doi:10.1016/j.jhazmat.2008.07.022

Cited by 33 publications

(20 citation statements)

References 35 publications

(64 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…On the other hand, a temperature rise has a slight effect of amino acid extraction. This trend has been observed in other extraction systems (20)(21)(22)(23)(24)(25)(26). The most favorable areas for cloud point are thus located in the darker color zones in Fig.…”

Section: Effect Of Surfactant Concentration and Temperature On The Exsupporting

confidence: 81%

“…The results of amino acid extraction from their 7.5 g/L (0.75 wt.%) aqueous solutions with Oxo-C 10 E 4 , according to two variables: wt.% surfactant (X t ), and temperature (T), are expressed by four responses (Y): percentage of extracted solute (E), residual concentrations of solute (X s,w ) and surfactant (X t,w ) in the dilute phase, and coacervate volume fraction at equilibrium (φ C ) (19)(20)(21)(22)(23)(24)(25)(26). Process optimization implies the maximization of E and the minimization of X s,w , X t,w , and φ C .…”

Section: Effect Of Surfactant Concentration and Temperature On The Exmentioning

confidence: 99%

“…Now, higher surfactant concentrations lead to higher E and lower X s,w values. So, the optimization of the process needs to compromise over the four studied parameters E, X s,w, X t.w, and φ c (20)(21)(22)(23)(24)(25)(26). On the basis of this finding, optimal values of φ c (i.e., 0.2) were obtained using 4 wt.% Dowfax 20B10 and 4 wt.% Oxo-C 10 E 4 at 50 • C and 40 • C, respectively.…”

Section: Volume Fraction Of Coacervatementioning

confidence: 99%

“…Therefore, thanks to micellar solubilization, the solute initially present in the solution may be favorably extracted into the surfactant-rich phase after increasing the temperature above T c . So far, many compounds were extracted using cloud point extraction (16): metal ions (17,18), organic compounds (19)(20)(21)(22)(23)(24)(25)(26), and proteins (27,28). Amino acid separation and recovery, rather than degradation, may be relevant, e.g., in wastewater of amino acid producing industry.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Cloud Point Extraction of α-Amino Acids

Ghouas¹,

Haddou²,

Kameche³

et al. 2014

Separation Science and Technology

Self Cite

View full text Add to dashboard Cite

Cloud point extraction with a polyethoxylated alcohol (Oxo-C 10 E 4 ) is used to separate five α-amino acids: alanine, valine, leucine, isoleucine, and phenylalanine (0.75 wt.% in water), and their extraction efficiencies are compared. The variables affecting phase separation and extraction (wt.% surfactant and equilibrium temperature) are optimized using experimental design. The four responses are: percentage of solute extracted (E), residual concentrations of solute (amino acid) and surfactant in the dilute phase, and volume fraction of coacervate at equilibrium. E increases with surfactant concentration and amino acid hydrophobicity in the following order: alanin < valin < leucin < isoleucine < phenylalanine, with respective maximum values: 73, 74, 76, 78.5, and 95%, and decreases with a temperature rise. It also makes sense that aspartic and glutamic acids, much more hydrophilic, are poorly extracted (E ∼ 10%). The trend observed is consistent with water/n-octanol partition coefficient (Log P) of amino acids in pure water. A more detailed study is presented for alanine and phenylalanine. Addition of sodium sulphate or cetylammonium bromide greatly raises extraction rates.

show abstract

Section: Effect Of Surfactant Concentration and Temperature On The Exsupporting

confidence: 81%

Section: Effect Of Surfactant Concentration and Temperature On The Exmentioning

confidence: 99%

Section: Volume Fraction Of Coacervatementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Cloud Point Extraction of α-Amino Acids

Ghouas¹,

Haddou²,

Kameche³

et al. 2014

Separation Science and Technology

Self Cite

View full text Add to dashboard Cite

show abstract

“…Indeed, the oily phase is generally constituted of hydrocarbon. Most hydrophobic compounds (hydrocarbons) present in this (O/W) emulsion can then be solubilized in non-ionic surfactant micelles and concentrated in the small volume of coacervat after phase separation beyond the cloud point of the surfactant [18].…”

Section: Introductionmentioning

confidence: 99%

Elimination of fuel spills from effluent using cloud point extraction methods

Ghouas

Haddou

Bouabdesselam

et al. 2010

Journal of Hazardous Materials

Self Cite

View full text Add to dashboard Cite

Computational Simulation for Transport of Priority Organic Pollutants through Nanoporous Membranes

et al. 2013

View full text Add to dashboard Cite

Modeling and simulation of membrane‐based solvent extraction is conducted by computational fluid dynamics (CFD). The process is used for removal of priority organic pollutants from aqueous waste streams in nanoporous membranes. The pollutants include phenol, nitrobenzene, and acrylonitrile extracted by organic solvents. The mathematical model commonly applied to predict the performance of membrane‐based solvent extraction is the conventional resistance‐in‐series model. Here, a comprehensive mathematical model is developed to predict the transport of pollutants through nanoporous media. In order to predict the performance of the separation process, conservation equations for pollutants in the membrane module are derived and solved numerically. The model is then validated through comparing with experimental data reported in the literature. The simulation results were in good agreement with the experimental data for different values of feed flow rates.

show abstract

Simultaneous elimination of dissolved and dispersed pollutants from cutting oil wastes using two aqueous phase extraction methods

Cited by 33 publications

References 35 publications

Cloud Point Extraction of α-Amino Acids

Cloud Point Extraction of α-Amino Acids

Elimination of fuel spills from effluent using cloud point extraction methods

Computational Simulation for Transport of Priority Organic Pollutants through Nanoporous Membranes

Contact Info

Product

Resources

About