Ion exchange of Pb2+, Cu2+, Fe3+, and Cr3+ on natural clinoptilolite: selectivity determination and influence of acidity on metal uptake

Inglezakis, Vassilis J.; Loizidou, Maria; Grigoropoulou, H.

doi:10.1016/s0021-9797(02)00244-8

Cited by 286 publications

(215 citation statements)

References 18 publications

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“…Structural stability of clinoptilolite is not expected to be affected by uptake of cations, especially if this uptake takes place near the neutral pH range, as was the case in our experiments. It is reported that this mineral can even withstand acidic attack up to a pH around 1 [8]. As was discussed earlier, the sorption sites of kaolinite are located mainly on the surface and edge parts [3]; thus the basal (interlayer) space is expected to retain its dimensions upon sorption.…”

Section: Xrpd Analysis Of the Cs-loaded Mineralsmentioning

confidence: 80%

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Physicochemical characterization of the retardation of aqueous Cs+ ions by natural kaolinite and clinoptilolite minerals

Shahwan

Akar

Eroğlu

2005

Journal of Colloid and Interface Science

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The aim of this study was to carry out kinetic, thermodynamic, and surface characterization of the sorption of Cs + ions on natural minerals of kaolinite and clinoptilolite. The results showed that sorption followed pseudo-second-order kinetics. The activation energies were 9.5 and 13.9 kJ/mol for Cs + sorption on kaolinite and clinoptilolite, respectively. Experiments performed at four different initial concentrations of the ion revealed that the percentage sorption of Cs + on clinoptilolite ranged from 90 to 95, compared to 28 to 40 for the kaolinite case. At the end of a 1 week period, the percentage of Cs + desorption from clinoptilolite did not exceed 7%, while it amounted to more than 30% in kaolinite, indicating more stable fixation by clinoptilolite. The sorption data were best described using Freundlich and D-R isotherm models. Sorption showed spontaneous and exothermic behavior on both minerals, with H 0 being −6.3 and −11.4 kJ/mol for Cs + uptake by kaolinite and clinoptilolite, respectively. Expanding the kaolinite interlayer space from 0.71 to 1.12 nm using DMSO intercalation, did not yield a significant enhancement in the sorption capacity of kaolinite, indicating that the surface and edge sites of the clay are more energetically favored. EDS mapping and elemental analysis of the surface of kaolinite and clinoptilolite revealed more intense signals on the surface of the latter with an even distribution of sorbed Cs + onto the surfaces of both minerals.

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Section: Xrpd Analysis Of the Cs-loaded Mineralsmentioning

confidence: 80%

“…It is also reported that the sorbed cations might be coordinated with the defined number of water molecules, and located on specific sites in framework channels [6]. Clinoptilolite has received extensive attention due to its attractive selectivity for certain heavy metal cations such as lead, cadmium, and nickel [8].…”

Section: Introductionmentioning

confidence: 99%

Physicochemical characterization of the retardation of aqueous Cs+ ions by natural kaolinite and clinoptilolite minerals

Shahwan

Akar

Eroğlu

2005

Journal of Colloid and Interface Science

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“…However, in some reports, not all parameters have been taken into consideration, and, in other cases, the values used for these parameters were not experimentally justified. See, for example, the results reported by Inglezakis et al (2002Inglezakis et al ( , 2003 and Kragovic et al (2012).…”

Section: Introductionmentioning

confidence: 88%

“…Particularly, clinoptilolite-type zeolite has been used successfully for removing lead from contaminated water (Bailey et al 1999;Inglezakis et al 1999;Inglezakis et al 2002Inglezakis et al , 2003Babel and Kurniawan Electronic supplementary material The online version of this article (doi:10.1007/s13762-016-0956-9) contains supplementary material, which is available to authorized users. & M. S. Pomares-Alfonso mpomares@imre.oc.uh.cu 2003; Ramos et al 2004;Sprynskyy et al 2006;Castaldi et al 2008;Wang and Peng 2010;Misaelides 2011;Kragovic et al 2012).…”

Section: Introductionmentioning

confidence: 99%

Cuban zeolite for lead sorption: application for water decontamination and metal quantification in water using nondestructive techniques

Enamorado-Horrutiner

Villanueva-Tagle

Behar

et al. 2016

Int. J. Environ. Sci. Technol.

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In the present paper, a Cuban clinoptilolite-type zeolite was used as lead sorbent. The effect of chemical conditioning with 1 mol L -1 NaCl, NaOH and NH 3 solutions at room temperature on the ion exchange capacity for lead uptake by clinoptilolite has been investigated. According to the batch experiments, NH 3 -treated clinoptilolite exhibited the highest sorption capacity. For this material, the effect that contact time, solid-to-liquid ratio and pH have on the removal of lead from aqueous solutions was comprehensively analyzed, and the most suitable values for these parameters were selected afterward. The pseudo-second-order kinetic model was appropriate for the description of the kinetic performance of the sorption. The Langmuir and Freundlich isotherm models were applied to describe sorption process, and the best fit was reached by using the Freundlich model. The nondestructive techniques, namely particle-induced X-ray emission and X-ray fluorescence, have successfully been evaluated for determining lead concentration in water by its concentration in zeolite. In addition, the more traditional flame atomic absorption spectrometry determination of lead in water was also improved.

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“…Los metales pesados ejercen efectos biológicos que pueden ser beneficiosos o perjudiciales para los distintos organismos, no son biodegradables y tienden a acumularse (Inglezakis, Loizidou, & Grigoropoulou, 2003), causando numerosas enfermedades y trastornos, razón por la cual han sido catalogados como una clase emergente de cancerígenos humanos (Farajzadeh & Monji, 2004). Elevadas concentraciones de algunos de estos elementos en el ambiente o en determinados procesos pueden desencadenar una serie de problemáticas que van desde la degradación y pérdida de fertilidad de suelos, hasta afectar procesos de tratamiento de aguas residuales.…”

Section: Generalidades De Los Metales Pesadosunclassified

Biomasa residual para remoción de mercurio y cadmio: una revisión

2012

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La contaminación de las aguas residuales industriales con metales pesados es uno de los problemas ambientales más graves que se presenta hoy en día. El tratamiento de estos efluentes mediante adsorbentes extraídos de biomasas residuales ha sido estudiado durante los últimos años como una alternativa económica y eficiente, con posibilidades para su aplicación industrial. En el presente artículo se identifican algunas biomasas usadas y su capacidad de adsorción de Mercurio y Cadmio en aguas contaminadas. Se encontró que los bioadsorbentes pretratados químicamente presentan mayor porcentaje de remoción que los que no han sido modificados, la biomasa con mejores resultados fue la cascara de arroz, para el mercurio, modificada con ácido sulfúrico con una remoción de 384,6 mg/g, y para el cadmio, modificada con álcalis con una remoción de 125,94 mg/g. Además, la cinética del proceso de adsorción, en la mayoría de los experimentos, es regida por la ecuación cinética de pseudo-segundo orden.

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Ion exchange of Pb2+, Cu2+, Fe3+, and Cr3+ on natural clinoptilolite: selectivity determination and influence of acidity on metal uptake

Cited by 286 publications

References 18 publications

Physicochemical characterization of the retardation of aqueous Cs+ ions by natural kaolinite and clinoptilolite minerals

Physicochemical characterization of the retardation of aqueous Cs+ ions by natural kaolinite and clinoptilolite minerals

Cuban zeolite for lead sorption: application for water decontamination and metal quantification in water using nondestructive techniques

Biomasa residual para remoción de mercurio y cadmio: una revisión

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