Silver, zinc, and copper exchange in a Na-clinoptilolite and resulting effect on antibacterial activity

Top, Ayben; Ülkü, Semra

doi:10.1016/j.clay.2003.12.002

Cited by 252 publications

(141 citation statements)

References 16 publications

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“…Zeolitic tuff rich in clinoptilolite mineral from Gördes (Western Anatolia) was used. It was characterized and used after grinding and sieving from a 45 m sieve [14]. The composition of clinoptilolite was 66.36% SiO 2 , 11.36% Al 2 O 3 , 1.227% Fe 2 O 3 , 3.844% K 2 O, 0.998% Na 2 O, 2.344% CaO, 0.420% MgO, 14.22% H 2 O.…”

Section: Methodsmentioning

confidence: 99%

Synergistic effect of metal soaps and natural zeolite on poly(vinyl chloride) thermal stability

Atakul¹,

Balköse²,

Ülkü³

2005

J Vinyl Addit Technol

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The synergistic effect of metal soaps (zinc stearate and calcium stearate) and/or natural zeolite (clinoptilolite) on PVC thermal stability was investigated. For this purpose, PVC plastisol was prepared by mixing poly(vinyl chloride) (PVC) and dioctyl phthalate (DOP) and stabilized with different amounts of metal soaps and zeolite. Kinetic studies of dehydrochlorination at 140 and 160°C were done for unstabilized and stabilized PVC plastigels using 763 PVC Thermomat equipment. The stabilizing effect of zeolite on the increase in the induction period of the sample was considered to result from the absorption of HCl, a property that was thought to reduce the autocatalytic effect of HCl evolved at the initial stages of dehydrochlorination. Since the induction time of the sample having 0.53% of zinc stearate and 0.53% of zeolite was higher than those of the PVC plastigels having only zinc stearate or zeolite, the synergistic effect on thermal stability was observed at low levels of these additives.

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Section: Methodsmentioning

confidence: 99%

Synergistic effect of metal soaps and natural zeolite on poly(vinyl chloride) thermal stability

Atakul¹,

Balköse²,

Ülkü³

2005

J Vinyl Addit Technol

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“…Zeolites have been used as support materials for silver ions with studies demonstrating the effective elimination of microorganisms from aqueous media by silvermodified zeolites [1,[16][17][18][19][20][21]. Most of these studies have focused on the antibacterial properties of silver with the zeolites acting as inert supports with the exception of Krishnani et al (2012) who investigated the combined disinfection and ammonia removal performance of silver ionexchanged zeolites [21].…”

Section: Introductionmentioning

confidence: 99%

Disinfection and removal performance for Escherichia coli and heavy metals by silver-modified zeolite in a fixed bed column

Akhigbe

Ouki

Saroj

2016

Chemical Engineering Journal

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“…These minerals consist of corner-sharing AlO 4 and SiO 4 tetrahedra. Their ion-exchange, adsorption, and molecular sieve properties make them unique and advantageous for use in different agricultural, chemical and environmental applications [1,2]. Recently the incorporation of organic molecules onto clinoptilolite and synthetic zeolites has attracted growing interest because their frameworks are suitable for the encapsulation and/or adsorption of different molecules.…”

Section: Introductionmentioning

confidence: 99%

Kinetic and equilibrium studies of adsorption of β-glucuronidase by clinoptilolite-rich minerals

Kavak

Ülkü

2015

Process Biochemistry

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a b s t r a c tThe adsorption of the bacterial ␤-glucuronidase (GUS) enzyme, which is thought to be responsible for the production of reactive metabolites related to some diseases and cancer development, by clinoptiloliterich mineral was investigated. Batch experiments were performed to analyze of the effects of the clinoptilolite amount and particle size, initial GUS concentration, shaking rate, pH and temperature on the adsorption equilibrium and kinetics. Adsorption equilibrium data were interpreted in terms of Langmuir and Freundlich isotherms; and they were well represented by the Langmuir isotherm model. The percentage of GUS removal by the clinoptilolite-rich mineral was changed in the range of 9.4-54.4% depending on its initial concentration. The kinetic data were analyzed using external film diffusion, intraparticle diffusion, pseudo-first-order and pseudo-second-order models and both external film and intraparticle diffusion appeared to be effective in GUS adsorption. Thermodynamic studies indicated that GUS adsorption is exothermic, physical and spontaneous at the temperatures investigated (288-310 K).

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Silver, zinc, and copper exchange in a Na-clinoptilolite and resulting effect on antibacterial activity

Cited by 252 publications

References 16 publications

Synergistic effect of metal soaps and natural zeolite on poly(vinyl chloride) thermal stability

Synergistic effect of metal soaps and natural zeolite on poly(vinyl chloride) thermal stability

Disinfection and removal performance for Escherichia coli and heavy metals by silver-modified zeolite in a fixed bed column

Kinetic and equilibrium studies of adsorption of β-glucuronidase by clinoptilolite-rich minerals

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