Adsorption of Zn2+ ions onto NaA and NaX zeolites: Kinetic, equilibrium and thermodynamic studies

Nibou, Djamel; Mekatel, H.; Amokrane, Samira; Barkat, M.; Trari, M.

doi:10.1016/j.jhazmat.2009.08.132

Cited by 175 publications

(87 citation statements)

References 32 publications

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“…This is an interesting characteristic as the pH of the metal containing wastewaters such as electroplating industry wastewater or acid mine drainage wastewater [26] varies from highly acidic to near neutral [29,50,51,52], where activated carbon is unable to adsorb zinc [53]. Though the adsorption capacity of BioSeNPs is low in comparison to Dowex HCR S/S resin (Qe 172.2 mg g −1 ) [54], NaA and NaX zeolites (Qe 118.9 and 106.4 mg g −1 ) [55], the adsorption capacity of BioSeNPs is higher than most of the common adsorbents used for zinc removal such as aluminosilicates, non-modified zeolite, bentonite or activated carbon (see Table 1). Commercial activated powder carbon 20.5 7.0 400 (e) [53] This study opens perspectives to develop a novel adsorption technology where…”

Section: Practical Implicationsmentioning

confidence: 99%

Adsorption of zinc by biogenic elemental selenium nanoparticles

Jain

Jordan

Schild

et al. 2015

Chemical Engineering Journal

128

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The adsorption of Zn 2+ ions onto biogenic elemental selenium nanoparticles (BioSeNPs) was investigated. BioSeNPs were produced by reduction of selenite (SeO 3 2− ) in the presence of anaerobic granules from a full scale upflow anaerobic sludge blanket (UASB) reactor treating paper mill wastewater. The BioSeNPs have an iso-electric point at pH 3.8 at 5 mM background electrolyte concentration. X-ray photoelectron spectroscopy showed the presence of a layer of extracellular polymeric substances on the surface of BioSeNPs providing colloidal stability. Batch adsorption experiments showed that the uptake of Zn 2+ ions by BioSeNPs was fast and occurred at a pH as low as 3.9. The maximum adsorption capacity observed was 60 mg of zinc adsorbed per g of BioSeNPs. The Zn 2+ ions adsorption on the BioSeNPs was largely unaffected by the presence of Na + and Mg 2+ , but was impacted by the presence of Ca 2+ and Fe 2+ ions.

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Section: Practical Implicationsmentioning

confidence: 99%

Adsorption of zinc by biogenic elemental selenium nanoparticles

Jain

Jordan

Schild

et al. 2015

Chemical Engineering Journal

128

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“…Hui et al (2005) suggested that the adsorption rate of heavy metals onto a zeolite, 4A, synthesized from fly ash could be estimated using the pseudo second-order kinetic model, which was more accurate than the pseudo first-order kinetic model. In the Zn 2+ adsorption experiment, Na-A zeolite required more time to reach equilibrium than Na-X zeolite, and the adsorption capacities reached equilibrium for all concentrations of solutions within approximately 120 min (Nibou et al, 2010). …”

Section: Adsorption Kineticsmentioning

confidence: 98%

Kinetics and Thermodynamic Properties Related to the Adsorption of Copper and Zinc onto Zeolite Synthesized from Coal Fly Ash

Lee¹,

Ambrosia²

2013

Journal of Environmental Science International

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Na-A zeolite (Z-Cl) was synthesized from coal fly ash, which is a byproduct of coal combustion for the generation of electricity. The adsorption of Cu 2+ and Zn 2+ions onto Z-C1 was investigated via batch tests over a range of temperatures (303.15 to 323.15 K). The resultant experimental equilibrium data were compared to theoretical values calculated using model equations. With these results, the kinetics and equilibrium parameters of adsorption were calculated using Lagergren and Langmuir-Freundlich models. The adsorption kinetics revealed that the pseudo second-order kinetic mechanism is predominant. The maximum adsorption capacity (qmax) and Zn 2+ were spontaneous and endothermic. Collectively, these results suggest that the synthesized zeolite, Z-C1, can potentially be used as an adsorbent for metal ion recovery during the treatment of industrial wastewater at high temperatures.

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“…By using a corrected selectivity coefficient, Na M , the thermodynamic equilibrium constant can be rewritten eqn. (9).…”

Section: Theory Of Cation Exchange In Zeolitesmentioning

confidence: 99%

“…There are several studies dealing with divalent heavy metals adsorption onto synthetic zeolites, 9,10 but no detailed analysis for the cation exchange mechanism is available. The current study highlights the theory of ion exchange in synthetic NaX and LTA zeolites. )…”

Section: Introductionmentioning

confidence: 99%

Cation Exchange Mechanism of Divalent Metals ions onto Synthetic NaX and LTA Zeolites: Efficiency and Selectivity

Ezzeddine¹,

Batonneau−Gener²,

Pouilloux³

2018

ECB

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In this investigation, the removal of divalent heavy metals by two types of zeolites has been studied. The mechanism of cation exchange for Cu 2+ , Ni 2+ , Cd 2+ and Pb 2+ on NaX Faujasite and Linde type A (LTA) zeolites was studied. Both zeolites are very efficient in divalent heavy metals removal from water. Ion exchange isotherms were performed and the thermodynamic parameters were calculated as well. Kielland plots showed that the order of selectivity is not the same for both the zeolites. For NaX it followed the following order Pb 2+ > Cu 2+ > Cd 2+ > Ni 2+ while for LTA the order is Pb 2+ > Cd 2+ > Cu 2+ > Ni 2+ . Exchange velocity (kw) and the radii of the hydrated metals ions are involved in determining this order of selectivity.

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Adsorption of Zn2+ ions onto NaA and NaX zeolites: Kinetic, equilibrium and thermodynamic studies

Cited by 175 publications

References 32 publications

Adsorption of zinc by biogenic elemental selenium nanoparticles

Adsorption of zinc by biogenic elemental selenium nanoparticles

Kinetics and Thermodynamic Properties Related to the Adsorption of Copper and Zinc onto Zeolite Synthesized from Coal Fly Ash

Cation Exchange Mechanism of Divalent Metals ions onto Synthetic NaX and LTA Zeolites: Efficiency and Selectivity

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