2002
DOI: 10.1016/s0927-7757(02)00241-8
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Adsorption of Cr(III) and Fe(III) on an inorganic–organic silicon hybrid surface

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Cited by 12 publications
(13 citation statements)
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“…It has been also stressed that adsorption thermodynamics is drastically affected by the equilibrium pH of the solutions. Regardless of the equilibrium pH, adsorption of the heavy metals by a single adsorbent could be completed in a quite different contact time (Carrott et al, 1997;Lalvani et al, 1998;Farias et al, 2002;Perez-Candela et al, 1995). Taking into account that equilibration of metal ions uptake by activated carbons depends on the equilibrium pH, authors agreed (Lyubchik et al, 2003) with the statement (Carrott et al, 1997) that it would be appropriate to express adsorption results in terms of the final solution pH.…”
mentioning
confidence: 99%
“…It has been also stressed that adsorption thermodynamics is drastically affected by the equilibrium pH of the solutions. Regardless of the equilibrium pH, adsorption of the heavy metals by a single adsorbent could be completed in a quite different contact time (Carrott et al, 1997;Lalvani et al, 1998;Farias et al, 2002;Perez-Candela et al, 1995). Taking into account that equilibration of metal ions uptake by activated carbons depends on the equilibrium pH, authors agreed (Lyubchik et al, 2003) with the statement (Carrott et al, 1997) that it would be appropriate to express adsorption results in terms of the final solution pH.…”
mentioning
confidence: 99%
“…11 Recently, styrenedivinylbenzene-based insoluble resins (e.g., Lewatit), gelatinous and macroporous copolymers, and crosslinked polymer adsorbents gained vital importance because of their ability to remove high quantities of ions. 12,13 The strong acid resins are the most employed ion exchangers in industrial operations for cation separations from an aqueous stream. The polystyrenic matrix offers a remarkable chemical and physical stability for temperatures of interest in treating aqueous solutions.…”
Section: Introductionmentioning
confidence: 99%
“…7 Recently, styrene/divinyl benzene (SDB) based insoluble resins (e.g., Lewatit), gelatinous and macroporous copolymers, and crosslinked polymer adsorbents have gained vital importance because of their ability to remove large quantities of ions. 8 de Farias et al 8 demonstrated that silicon inorganic-organic hybrids could be successfully used as sequestration agents for transition-metal cations. Many adsorption studies involving such matrices are dedicated only to divalent metal cations.…”
Section: Introductionmentioning
confidence: 99%
“…There have also been limited studies on the synthesis of a hybrid matrix through the sol-gel process, its characterization, and its adsorption of trivalent metal ions. 8 Deep beds of low-crosslinked ion-exchange resins have been tested as a means of corrosion-product removal from condensate water in a boiling-water nuclear reactor. 9 Although lowcrosslinked resin polishers can readily reduce Fe to less than 1 mg of Fe/L, their use requires caution and further study because they may release undesirable sulfates into the water system.…”
Section: Introductionmentioning
confidence: 99%