Removal of chromium ions from aqueous solutions by polymer-enhanced ultrafiltration

Aroua, Mohamed Kheireddine; Zuki, Fathiah Mohamed; Sulaiman, Nik Meriam Nik

doi:10.1016/j.jhazmat.2007.01.120

Cited by 279 publications

(136 citation statements)

References 24 publications

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“…This shows that the behaviour of gelatinization on unmodified starch does not significantly influence the permeate flux in PEUF system. The same results on flux showed by Aroua et.al, where pH has a little effect on flux efficiency in removal of chromium ions (Aroua et al 2007). …”

Section: Effect Of Ph On Peuf Fluxsupporting

confidence: 75%

“…and cationic Pb(II), resulting in increased retention. According to previous study by Aroua et al, by using PEI as binding polymer, retention increased as pH increased to up to 99 % for Cr(III) ions removal and contrary with Cr(VI), where retention dropped as pH increased up to pH 12 (Aroua et al 2007). …”

Section: Effect Of Ph On Zn(ii) and Pb(ii) Retention Using Peimentioning

confidence: 83%

“…Hence, this phenomenon contributes towards the production of ions caused by low ionic atmosphere compared to diameter of polymeric coil because of the decrease in repulsive ions influencing the decrease in the chain rigidity. Hence, reluctant expand of polymeric coil causes a decrease in solution viscosity (Aroua et al 2007). The reasons for employing low polymer concentrations are to minimize polymer losses and to have high metal ions retention (Bicak et al 2013).…”

Section: Effect Of Polymer Concentration On Zn(ii) and Pb(ii) Ion Retmentioning

confidence: 99%

“…In PEUF studies, one of the most important operating parameters is pH. As indicated from previous studies, pH shows significant effects on flux and retention (Aroua et al 2007). Generally, it is due to competition of hydrogen ions with metal ions, which can be trapped in the polymer structure at low pH.…”

Section: Introductionmentioning

confidence: 99%

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Removal of zinc and lead ions by polymer-enhanced ultrafiltration using unmodified starch as novel binding polymer

Baharuddin

Sulaiman

Aroua

2014

Int. J. Environ. Sci. Technol.

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The removal of zinc and lead from aqueous dilute solutions by polymer-enhanced ultrafiltration process using unmodified starch as a new binding polymer was studied. Experiments were performed to determine the effects of transmembrane pressure, pH, concentration of metal ions on the retention and permeate flux. The performance of the proposed new binding polymer was compared to that of polyethyleneimine a conventional polymer frequently used in polymer-enhanced ultrafiltration. The retention of zinc and lead ions reached 96 and 66 %, respectively, using 0.05 % unmodified starch at pH 7. Overall unmodified starch showed better retention for zinc ions then polyethyleneimine, whereas polyethyleneimine retention for lead ions was higher. Solution pH was found to have little effect on flux.

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Section: Effect Of Ph On Peuf Fluxsupporting

confidence: 75%

Section: Effect Of Ph On Zn(ii) and Pb(ii) Retention Using Peimentioning

confidence: 83%

Section: Effect Of Polymer Concentration On Zn(ii) and Pb(ii) Ion Retmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Removal of zinc and lead ions by polymer-enhanced ultrafiltration using unmodified starch as novel binding polymer

Baharuddin

Sulaiman

Aroua

2014

Int. J. Environ. Sci. Technol.

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“…Typical polymers that bind metal ions include high-molecular amines, amides, carboxylic acids, amino acids, alcohols and imines. In most studies, chelating or weak cation-exchange polymers (chitosan [8,9], polyethyleneimine [8][9][10][11], poly(acrylic acid) or its sodium salt [11], poly(vinyl alcohol) [12]) were used as metal binding agents. This research aimed to present the possibilities for applying water soluble polyelectrolyte with strong ion-exchange groups to enhance the ultrafiltration removal of metals from galvanic wastewater.…”

mentioning

confidence: 99%

Galvanic Wastewater Treatment by Means of Anionic Polymer Enhanced Ultrafiltration

Korus¹

2012

Ecological Chemistry and Engineering S

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This work is focused on polyelectrolyte enhanced ultrafiltration as an effective heavy metal separation technique. Three types of effluents, containing Zn(II), Cu(II) and Ni(II) ions, were subjected to the separation process. Poly(sodium 4-styrenesulfonate) -PSSS, a water soluble anionic polyelectrolyte was used as a metal binding agent. Two Sepa® CF (Osmonics) membranes: EW, made of polysulfone and a modified polyacrylonitrile membrane MW, were used in the ultrafiltration process. The preliminary UF tests were carried out on model solutions with target metal ion concentrations of 10, 100 and 250 mg dm . The main parameters affecting the metal retention (the polyelectrolyte quantity and solution pH) were examined. The values of pH 6 and polymer : metal concentration ratio CPSSS : CM = 7.5 : 1 (mol of mer unit per mol of metal) were selected to perform the galvanic wastewater ultrafiltration-concentration tests. Three types of wastewater containing Zn(II), Ni(II) and Cu(II) ions within the concentration range of 30÷70 mg dm -3 were used in the investigations. Very high metal retention coefficients, up to > 99%, were achieved. The retentates obtained were subjected to the decomplexation-ultrafiltration (pH = 1) and subsequent diafiltration step, which enabled partial recovery of concentrated metal ions and the polyelectrolyte. The recovered polyelectrolyte was reused toward Ni(II) ions and the high effectiveness of metal separation has been achieved. Keywords: polymer enhanced ultrafiltration, heavy metals, galvanic wastewater, polyelectrolyteThe membrane separation processes create new possibilities for the effective purification of galvanic wastewater. One of the most interesting propositions is a polymer enhanced ultrafiltration which combines two processes: metal ions binding with soluble polymeric ligands and retention of resulting macromolecular compounds on an ultrafiltration membrane. Polymer enhanced ultrafiltration has been successfully applied to the separation of metal ions from aqueous solutions, most often Cu, Ni, Zn, Co, Cd, Hg, Cr(III) and radionuclides [1][2][3][4][5][6][7].Basically, two types of polymer used in the process can be distinguished. The first one encompasses chelating polymers, able to form coordination bonds with metal ions, the other includes polyelectrolytes, which have ion-exchange properties. Typical polymers that bind

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Hybrid Processes Combining Sorption and Membrane Filtration

Kabay

Bryjak

2013

Encyclopedia of Membrane Science and Technology

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Different separations have been used for various environmental applications in industry. Selective separations for the target species and fast kinetics are among the most important criteria to select the most suitable separation process. A hybrid process combines elements of two or more traditional separation processes into one. The main benefits of hybrid processes are lower energy consumption than conventional systems, lower recycle stream, higher yields, and higher sustainability. The main goal of this article is to classify the membrane‐based hybrid processes described in the literature. The attempt to introduce such hybrid processes, especially sorption‐membrane filtration hybrid method, as an alternative means for environmental cleanup is the second goal. These processes were elucidated by modeling and construction of such systems through some case studies.

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Removal of chromium ions from aqueous solutions by polymer-enhanced ultrafiltration

Cited by 279 publications

References 24 publications

Removal of zinc and lead ions by polymer-enhanced ultrafiltration using unmodified starch as novel binding polymer

Removal of zinc and lead ions by polymer-enhanced ultrafiltration using unmodified starch as novel binding polymer

Galvanic Wastewater Treatment by Means of Anionic Polymer Enhanced Ultrafiltration

Hybrid Processes Combining Sorption and Membrane Filtration

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