Removal of heavy metals in industrial wastewaters by ion-exchanger grafted textiles

Lacour, Stella; Bollinger, Jean‐Claude; Serpaud, Bernard; Chantron, Pierre; Arcos, Richard

doi:10.1016/s0003-2670(00)01215-0

Cited by 89 publications

(53 citation statements)

References 17 publications

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“…One of the important adsorption mechanisms is that metal ions interact with the surfaces of adsorbent through complexation or ion exchange (Chandra et al 2010;Lacour et al 2001). According to the literature (Deng et al 2003), the adsorbents with carboxylate, sulfonic, and phosphoric groups on the surfaces favor metal ion adsorption through the ion exchange mechanism, while those containing amine groups on the surfaces adsorb metal ions through the complexation and chelation mechanisms.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Pb(II) and Cu(II) metal ions on functionalized large-pore mesoporous silica

Lee

Chen

Cheng

et al. 2015

Int. J. Environ. Sci. Technol.

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Adsorption of copper and lead ions in aqueous solutions onto large-pore mesoporous silica materials functionalized with amino and mercapto groups and those with different morphologies including fiber-like, rod-like, and platelet was studied. The synthesized materials were characterized by techniques such as X-ray powder diffraction, nitrogen adsorption-desorption isotherms, scanning electron microscopy, and infrared spectra. Batch experiments were conducted to determine the adsorption processes. The equilibrium adsorption data agreed with Langmuir isotherms and revealed that four amino groups were required to form a stable surface complex with copper ions. Results indicated that initial adsorption rate onto platelet mesoporous adsorbent was rapid and faster than that of rod-like and fibrous morphologies due to its short channeling pores. Thiol-functionalized mesoporous silica adsorbents of all the morphologies have a better affinity for Pb 2? than the amino-mesoporous silica. In contrast, aminomesoporous silica has a stronger affinity for Cu 2? compared to thiol-mesoporous silica. The optimal Pb 2? uptake on thiol-mesoporous silica was in solution with pH in 2-6, while the highest Cu 2? uptake on amino-mesoporous silica was at pH 5.

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Section: Introductionmentioning

confidence: 99%

Adsorption of Pb(II) and Cu(II) metal ions on functionalized large-pore mesoporous silica

Lee

Chen

Cheng

et al. 2015

Int. J. Environ. Sci. Technol.

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show abstract

“…-ion-exchange and complexation properties obtained by grafting various exchange functions onto a natural, artificial or synthetic matrix; -micrometer filtration properties (cutoff value: 0.1-5 mm); -ultra-fast exchange kinetics due to their high specific surface area and no reticulation; -reduction of regenerating solution consumption; -a variety of forms allowing many possibilities for their use (Lacour et al 2001). …”

Section: Introductionmentioning

confidence: 99%

Investigation of metal absorption and antibacterial activity on cotton fabric modified by low temperature plasma

et al. 2010

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In this work, the silver particle absorption and antibacterial activity of cotton fabric when modified by low temperature plasma were investigated. The modification consisted of plasma prefunctionalization followed by one-step wet treatment with silver nitrate solution. Oxygen and nitrogen were used as the working gases in the system, and the results were compared. The results showed that nitrogen plasma-treated samples can absorb more silver particles than oxygen-treated samples, and thus the antibacterial activity of the samples in this case, which was analyzed by the counting bacteria test, was increased considerably.

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“…It may be concluded that by increasing the adsorbent dose the removal efficiency increases but ion-exchange density decreases. The decrease in ion-exchange density can be attributed to the fact that some of the ion exchange remains unsaturated during the sorption process; whereas the number of available ion-exchange sites increases by an increase in sorbent and this results in an increase in removal efficiency (Lacour et al, 2001). As expected, the equilibrium concentration decreases with increasing adsorbent doses for a given initial Cr (VI) concentration due to increase of surface area or ion-exchange sites for a fixed initial solute con cen tration (Cortina et al, 1996;Namasivayam and Yamuna, 1999;Pradhan et al, 1999;Yu et al, 2003).…”

Section: Resultsmentioning

confidence: 99%

Removal of chromium (VI) from aqueous solutions using Lewatit FO36 nano ion exchange resin

Rafati

Mahvi

Asgari

et al. 2009

Int. J. Environ. Sci. Technol.

135

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ABSTRACT:The removal of the chromium (VI) ion from aqueous solutions with the Lewatit FO36 ion-exchange resin is described at different conditions. The effects of adsorbent dose, initial metal concentration, contact time and pH on the removal of chromium (VI) were investigated. The batch ion exchange process was relatively fast and it reached equilibrium after about 90 min of contact. The ion exchange process, which is pH dependent showed maximum removal of chromium (VI) in the pH range 5.0-8.0 for an initial chromium (VI) concentration of 0.5 mg/dm 3 . The equilibrium related to Lewatit FO36 ion-exchange capacity and the amounts of the ion exchange were obtained using the plots of the Langmuir adsorption isotherm. It was observed that the maximum ion exchange capacity of 0.29 mmol of chromium (VI)/g for Lewatit FO36 was achieved at optimum pH value of 6.0. The ion exchange of chromium (VI) on this cationexchange resin followed first-order reversible kinetics.

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Removal of heavy metals in industrial wastewaters by ion-exchanger grafted textiles

Cited by 89 publications

References 17 publications

Adsorption of Pb(II) and Cu(II) metal ions on functionalized large-pore mesoporous silica

Adsorption of Pb(II) and Cu(II) metal ions on functionalized large-pore mesoporous silica

Investigation of metal absorption and antibacterial activity on cotton fabric modified by low temperature plasma

Removal of chromium (VI) from aqueous solutions using Lewatit FO36 nano ion exchange resin

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