Effect of Ca2+ ions on naphthalene adsorption/desorption onto calcium oxide nanoparticle: Adsorption isotherm, kinetics and regeneration studies

J Aravind Kumar; T Krithiga; G Narendrakumar; P Prakash; K Balasankar; S Sathish; D Prabu; D Purna Pushkala; Najat Marraiki; A G Ramu; Dongjin Choi

doi:10.1016/j.envres.2021.112070

Effect of Ca²⁺ ions on naphthalene adsorption/desorption onto calcium oxide nanoparticle: Adsorption isotherm, kinetics and regeneration studies

Environ Res. 2022 Mar;204(Pt B):112070. doi: 10.1016/j.envres.2021.112070. Epub 2021 Sep 24.

Authors

J Aravind Kumar¹, T Krithiga², G Narendrakumar³, P Prakash³, K Balasankar⁴, S Sathish⁵, D Prabu⁵, D Purna Pushkala⁵, Najat Marraiki⁶, A G Ramu⁷, Dongjin Choi⁷

Affiliations

¹ Department of Chemical Engineering, Sathyabama Institute of Science and Technology, Chennai, 600 119, India. Electronic address: aravind.chem@sathyabama.ac.in.
² Department of Chemistry, Sathyabama Institute of Science and Technology, Chennai, 600 119, India.
³ Department of Biotechnology, Sathyabama Institute of Science and Technology, Chennai, 600 119, India.
⁴ Department of Biomedical Engineering, Sathyabama Institute of Science and Technology, Chennai, 600 119, India.
⁵ Department of Chemical Engineering, Sathyabama Institute of Science and Technology, Chennai, 600 119, India.
⁶ Department of Botany and Microbiology, College of Sciences, King Saud University, P.O 2455, Riyadh, 11451, Saudi Arabia.
⁷ Department of Materials Science and Engineering, Hongik University, 2639-Sejong-ro, Jochiwon-eup, Sejong city, 30016, Republic of Korea.

PMID: 34555407
DOI: 10.1016/j.envres.2021.112070

Abstract

The adsorptive nature of calcium oxide nanoparticles in aqueous sample of naphthalene in presence of Ca²⁺ ions was estimated. Enhanced efficiency of calcium oxide regeneration (90%) with the aid of calcium chloride in the solution concentration of 0.002-0.1 M was depicted. The less degree of toxic naphthalene desorption merged with SEM, FTIR and XRD characterization data portrays the importance of naphthalene adsorption onto calcium oxide using calcium chloride for regeneration. Batch adsorption studies were performed to evaluate the operating parameters such as pH, naphthalene concentration, contact time and impact of Ca²⁺ on naphthalene study. The adsorption isotherm of naphthalene on calcium oxide nanoparticle was described by Langmuir, Freundlich, Temkin and Dubinin Radushkevich and theoretical maximum monolayer adsorption capacity was found to be 63.81 mg/g at 303 K. The adsorption kinetic best fitted with pseudo second order kinetic model. The positive influence of making the addition of Ca²⁺ ions into naphthalene solution for its rapid adsorption was elucidated which is leaded by a probable increase in sorption capacity for naphthalene molecules at lower concentrations. The stable nature of crystallinity of calcium oxide and a less degree of naphthalene molecules leaching during consecutive cycles of adsorptive process and nanoparticle regeneration was also scrutinized.

Keywords: Calcium oxide; Hydroxyl; Isotherm; Naphthalene; Regeneration.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Adsorption
Calcium Compounds
Hydrogen-Ion Concentration
Ions
Kinetics
Nanoparticles*
Naphthalenes
Oxides
Thermodynamics
Water Pollutants, Chemical* / analysis

Substances

Calcium Compounds
Ions
Naphthalenes
Oxides
Water Pollutants, Chemical
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