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Cited by 54Adsorption and biosorption for pollutant removalEnvironmental remediation with nanomaterialsCoagulation and Flocculation Studies

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Adsorption kinetics, equilibrium and thermodynamics of a textile dye V5BN by a natural nanocomplex material: Clinoptilolite

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Nannu Shankar, Sripriya, Dinakaran, Divakar Raj, Chandran, Dinesh Kumar, Mantha, Gopikrishna, Srinivasan, Bhuvaneswari, Nyayiru Kannaian, Udaya Prakash·2023·Energy Nexus
DOI 10.1016/j.nexus.2023.100197
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Abstract

Dyes are considered as a major pollutant released in industrial (leather, textile, and paper) effluents. In this study, the ability of Clinoptilolite in adsorbing an industrial dye (Violet 5BN) was assessed. Clinoptilolite was characterized by Scanning Electron Microscopy, Energy Dispersive analysis using X-ray and Brunauer, Emmett and Teller analysis. Batch studies at varying adsorbent dosage, pH, temperature, and time revealed that 96% of the dye was adsorbed with an adsorbent mass of 1.5 g at 30 °C, pH 5 and reaction time of 90 min. Both Langmuir and Freundlich isotherms were found to be fit, which proves the process to be heterogeneous. The experimental and calculated values of adsorption capacity were almost similar, with correlation coefficients greater than 0.9, thus implying pseudo-second order and intraparticle diffusion as the favorable models. Negative values of ΔG° indicate strong binding energy between the adsorbent and adsorbate, while negative ΔS° values prove less randomness of the process and higher adsorbate concentration on the adsorbent surface due to ion-exchange interaction. The exothermic nature of adsorption is evident from the negative ΔH° recorded. Thermodynamic studies showed the system was a spontaneous and enthalpy driven process, with chemisorption as the predominant mode of adsorption at 30 °C and physisorption at elevated temperatures. The study demonstrates the significance of natural clinoptilolite in environmental protection, as an adsorbent for remediation of dyes.

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Metadata

Authors
Nannu Shankar, S., Dinakaran, D. R., Chandran, D. K., Mantha, G., Srinivasan, B., & Nyayiru Kannaian, U. P.
Affiliations
Kuwait Institute for Scientific Research (KW)
ORCID
Venue
Energy Nexus
Publisher
Elsevier BV
Published
2023-06
Volume
10
Pages
100197
ISSN
2772-4271 (ISSN-L)
DOI
10.1016/j.nexus.2023.100197
OpenAlex
W4367043501
Cited by
54
References
0
Citations by year
2026: 10 · 2025: 28 · 2024: 14 · 2023: 2
FWCI
4.32
Type
journal article
Language
en
Open access
Licence
Locations
  • Energy Nexus (publishedVersion, cc-by)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Topics
  • Physical Sciences › Environmental Science › Water Science and Technology › Adsorption and biosorption for pollutant removal
  • Physical Sciences › Environmental Science › Environmental Engineering › Environmental remediation with nanomaterials
  • Physical Sciences › Environmental Science › Water Science and Technology › Coagulation and Flocculation Studies
Keywords
dye adsorption, clinoptilolite, textile dyes, adsorption kinetics, adsorption isotherms, adsorption thermodynamics, pseudo-second-order kinetics, intraparticle diffusion, Langmuir isotherm, Freundlich isotherm, chemisorption, physisorption, dye wastewater treatment

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CoChat. (2026). Citation check: Adsorption kinetics, equilibrium and thermodynamics of a textile dye V5BN by a natural nanocomplex material: Clinoptilolite. https://app.cochat.ai/papers/10.1016/j.nexus.2023.100197
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Nannu Shankar, S., Dinakaran, D. R., Chandran, D. K., Mantha, G., Srinivasan, B., & Nyayiru Kannaian, U. P. (2023). Adsorption kinetics, equilibrium and thermodynamics of a textile dye V5BN by a natural nanocomplex material: Clinoptilolite. Energy Nexus. https://doi.org/10.1016/j.nexus.2023.100197