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Use of clinoptilolite for the removal of nickel ions from water: Kinetics and thermodynamics
Abstract
This paper describes the removal of Ni(II) ions from aqueous solutions using clinoptilolite. The effect of clinoptilolite level, contact time, and pH were determined. Different isotherms were also obtained using concentrations of Ni(II) ions ranging from 0.1 to 100 mg L(-1). The ion-exchange process follows second-order reaction kinetics and follows the Langmuir isotherm. The paper discusses thermodynamic parameters, including changes in Gibbs free energy, entropy, and enthalpy, for the ion-exchange of Ni(II) on clinoptilolite, and revealed that the ion-exchange process was spontaneous and exothermic under natural conditions. The maximum removal efficiency obtained was 93.6% at pH 7 and with a 45 min contact time (for 25 mg L(-1) initial concentration and a 15 g L(-1) solid-to-liquid ratio).
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“Argun (2008) employed a Turkish Clinoptilolite for the removal of Ni(II) ions, reaching 93.6% of adsorption at pH 7 after 45 min of contact time for 25 mg/L initial concentration and a 15 g/L solid-to-liquid ratio.”
From Fundamental properties and sustainable applications of the natural zeolite clinoptilolite (2024) · cites this paper as Argun 2008
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Metadata
- Authors
- Argun, M. E.
- Affiliations
- Selçuk University (TR)
- Corresponding author
- Argun, Mehmet Emin
- ORCID
- Argun, Mehmet Emin
- Venue
- Journal of Hazardous Materials
- Publisher
- Elsevier BV
- Published
- 2008-02
- Volume
- 150
- Issue
- 3
- Pages
- 587-595
- ISSN
- 0304-3894 (ISSN-L)
- OpenAlex
- W2088107882
- Cited by
- 224
- References
- 37
- Citations by year
- 2026: 6 · 2025: 10 · 2024: 12 · 2023: 17 · 2022: 12 · 2021: 7 · 2020: 11 · 2019: 14 · 2018: 15 · 2017: 6 · 2016: 19 · 2015: 15 · 2014: 12 · 2013: 17 · 2012: 16
- FWCI
- 7.58
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Journal of Hazardous Materials (publishedVersion)
- PubMed (publishedVersion)
- Funders
- Selçuk Üniversitesi
- Topics
- Physical Sciences › Environmental Science › Water Science and Technology › Adsorption and biosorption for pollutant removal
- Physical Sciences › Environmental Science › Waste Management and Disposal › Chemical Synthesis and Characterization
- Physical Sciences › Materials Science › Metals and Alloys › Extraction and Separation Processes
- Keywords
- clinoptilolite, nickel removal, heavy metal adsorption, ion exchange kinetics, second-order kinetics, Langmuir isotherm, adsorption thermodynamics, Gibbs free energy, pH effect, contact time, zeolite adsorbents
- MeSH terms
- Adsorption, Ion Exchange, Kinetics, Nickel, Thermodynamics, Waste Disposal, Fluid, Water Pollutants, Chemical, Zeolites, Water Purification
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