2010
DOI: 10.1016/j.jhazmat.2009.08.132
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Adsorption of Zn2+ ions onto NaA and NaX zeolites: Kinetic, equilibrium and thermodynamic studies

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Cited by 177 publications
(87 citation statements)
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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%
“…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%
“…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%
“…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%