Dynamic micellar enhanced ultrafiltration: use of anionic (SDS)–nonionic(NPE) system to remove Cr3+ at low surfactant concentration

Aoudia, Mohamed; Allal, Nora; Djennet, Ahcene; Toumi, Leila

doi:10.1016/s0376-7388(03)00128-5

Cited by 83 publications

(41 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…SDS was selected as surfactant. Its CMC at room temperature is 8.3 mM (2390 mg/L) (Seung and Sohan 2014;Aoudia et al 2003). In this paper, a higher value (10 mM = 2884 mg/L) was used to perform …”

Section: Feed Water Characteristicsmentioning

confidence: 99%

See 1 more Smart Citation

Heavy Metal Removal from Liquid Wastes by Using Micellar-Enhanced Ultrafiltration

Tortora

Innocenzi

Prisciandaro

et al. 2016

Water Air Soil Pollut

View full text Add to dashboard Cite

Wastewaters from civil and industrial use, which contain high concentration of heavy metals, pose the problem for their correct disposal. They cannot be directly discharged in sewage systems, as metal ions represent a serious problem not only for human health but also for the environment. In this paper, the removal of nickel, cobalt, chromium, and zinc ions from synthetic liquid wastes was carried out, by using a micellarenhanced ultrafiltration (MEUF) process; an ultrafiltration (UF) membrane (a monotubular ceramic of molecular weight cutoff 210 kDa) together with sodium dodecyl sulfate (SDS) as an anionic surfactant was used, in a lab-scale experimental device. The synthetic liquid contained 10-mg/L metal ions (Cr, Zn, Co, Ni), while SDS concentration varied from values above and below critical micellar concentration (CMC). The experiments were carried out at room temperature (25°C). Results achieved showed that SDS was able to bind metal ions, resulting in a strong increase of rejection coefficient, which reached highest values in case of SDS concentration below CMC, unexpectedly.

show abstract

Section: Feed Water Characteristicsmentioning

confidence: 99%

“…Aoudia (Aoudia et al 2003) studied chromium removal by MEUF. The permeate flux and rejection characteristics of SDS and nonylphenol ethoxylated C 9 H 19 C 6 H 4 (CH 2 CH 2 O) 5 CH 2 CH 2 OH (NPE) micellar solutions for a ceramic tubular membrane (zirconium oxide-titanium oxide) were investigated.…”

Section: Introductionmentioning

confidence: 99%

Heavy Metal Removal from Liquid Wastes by Using Micellar-Enhanced Ultrafiltration

Tortora

Innocenzi

Prisciandaro

et al. 2016

Water Air Soil Pollut

View full text Add to dashboard Cite

show abstract

“…The unbound cations and the surfactant monomers pass through the ultrafiltration membrane to the permeate side. As mentioned earlier, some authors have used this technique for metals or organic compounds removal: used it to remove phenols; Aoudia et al (2003) employed anionic surfactant but not ionic surfactant mixtures to remove Cr 3+ ; Juang et al (2003) studied the removal of single metal ions including Cs, Sr, Mn, Co, Cu, Zn, and Cr;Liu et al (2004) studied the effects of the type and concentration of ligands on the removal of Cu by MEUF; Baek and Yang (2004) removed anionic salts and organic compounds; Purkait et al (2005) studied the separation of aromatic alcohols from aqueous streams.…”

Section: Introductionmentioning

confidence: 99%

“…Previous MEUF studies indicated that the permeate concentration of the surfactant is nearly equal to the surfactant concentration in the retentate or the surfactant CMC. Clearly, this may increase the cost of the separation process and/or make the process effluent unacceptable on environmental grounds (Aoudia et al 2003). Huang et al (1994) reported that two important parameters controlled the removal efficiency of metals: surfactant concentration and surfactant to metal molar ratio (S/M ratio).…”

Section: Introductionmentioning

confidence: 99%

Removal of Nickel by Means of Micellar-Enhanced Ultrafiltration (MEUF) Using Two Anionic Surfactants

Samper

Rodrı́guez

Sentana

et al. 2009

Water Air Soil Pollut

View full text Add to dashboard Cite

Micellar-enhanced ultrafiltration (MEUF) is an effective separation technique for removing metal ions from aqueous environments. The critical micellar concentration (CMC) of two anionic surfactants, sodium dodecyl sulfate (SDS) and linear alkylbenzene sulfonate (LAS), was determined by means of conductometry. The effects of pH, conductivity, and surfactant concentration on the permeate flow, retention of surfactants and nickel by MEUF, was studied. Results showed that for surfactant concentrations beyond the CMC, Ni(II) retention with SDS was slightly higher than with LAS (S/M=45: Ni(II) retention was 70% and 55% for SDS and LAS, respectively). LAS surfactant was always retained in higher quantities than SDS. An increase in conductivity produced large reduction in Ni(II) retention and slightly increased surfactant retention. pH values between 4 and 8 did not affect nickel retention but enhanced the SDS and LAS surfactant retentions.

show abstract

“…In the micellar ultrafiltration process the solution of surfactants with the concentration above the critical micellar concentration (CMC) is added to the solution of a separated substance, where the molecules/the ions of the removed substances are solubilized in the micelles. The diameter of the micelles is usually larger than the diameter of membrane pores and due to the ultafiltration process the solubilized compounds stay in retentate, while permeate contains nonsolubilized molecules of the separated compounds as well as the small amount of the monomeric form of the surfactant 10 . The elimination of the organic solvent from the separated system is the primary advantage of the MEUF method.…”

mentioning

confidence: 99%

Removal of metal ions from aqueous solutions by micellar enhanced ultra-filtration (MEUF)

Staszak

Redutko

Prochaska

2010

Polish Journal of Chemical Technology

View full text Add to dashboard Cite

The results of preliminary research on the possibility of removing of chromium(III) and copper(II) ions from micellar solutions in MEUF were described. The effectiveness of metal ions removal in the classical UF and MEUF was compared. It was confirmed that in the classical UF the retention of metal ions is small, independent of the concentration of the feed solution. The cross-flow micellar enhanced ultrafiltration experiments showed the usefulness of this method for the separation of metal ions from micellar solutions. The retention of metal ions in MEUF process is almost total in the case of the solutions of low concentration. However, for more concentrated solutions the retention is much smaller.

show abstract

Dynamic micellar enhanced ultrafiltration: use of anionic (SDS)–nonionic(NPE) system to remove Cr3+ at low surfactant concentration

Cited by 83 publications

References 8 publications

Heavy Metal Removal from Liquid Wastes by Using Micellar-Enhanced Ultrafiltration

Heavy Metal Removal from Liquid Wastes by Using Micellar-Enhanced Ultrafiltration

Removal of Nickel by Means of Micellar-Enhanced Ultrafiltration (MEUF) Using Two Anionic Surfactants

Removal of metal ions from aqueous solutions by micellar enhanced ultra-filtration (MEUF)

Contact Info

Product

Resources

About