Novel and sustainable green sulfur-doped carbon nanospheres via hydrothermal process for Cd (II) ion removal

Singh, S and Naik, TSSK and Basavaraju, U and Pavithra, N and Varshney, R and Chauhan, V and Shehata, N and Thamaraiselvan, C and Subramanian, S and Singh, J and Khan, NA and Zahmatkesh, S and Singh, L and Ramamurthy, PC (2023) Novel and sustainable green sulfur-doped carbon nanospheres via hydrothermal process for Cd (II) ion removal. In: Chemosphere, 328 .

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Abstract

Herein, the synthesis, characterization, and adsorption performance of a novel green sulfur-doped carbon nanosphere (S-CNs) is studied to eliminate Cd (II) ions from water effectively. S-CNs were characterized using different techniques including Raman spectroscopy, powder X-ray diffraction (PXRD), scanning electron microscopy (SEM) with energy dispersive X-ray analysis (EDX), Brunauer–Emmett–Teller (BET) specific surface area analysis and Fourier transform infrared spectrophotometry (FT-IR), were performed. The efficient adsorption of the Cd (II) ions onto S-CNs strongly depended on pH, initial concentration of Cd (II) ions, S-CNs dosage, and temperature. Four isotherm models (Langmuir, Freundlich, Temkin & Redlich Peterson) were tested for modeling. Out of four, Langmuir showed more applicability than the other three models, with a Qmax value of 242.72 mg/g. Kinetic modeling studies suggest a superior fit of the obtained experimental data with the Elovich equation (linear) and pseudo-second-order (non-linear) rather than other linear and non-linear models. Data obtained from thermodynamic modeling indicates that using S-CNs for Cd (II) ions adsorption is a spontaneous and endothermic . The current work recommends using better and recyclable S-CNs to uptake excess Cd (II) ions.

Item Type:	Journal Article
Publication:	Chemosphere
Publisher:	Elsevier Ltd
Additional Information:	The copyright for this article belongs to Elsevier Ltd.
Keywords:	Adsorption; Cd removal; Green sulfur-doped carbon nanosphere; Recyclability
Department/Centre:	Division of Interdisciplinary Sciences > Interdisciplinary Centre for Energy Research Division of Interdisciplinary Sciences > Interdisciplinary Centre for Water Research Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	21 Apr 2023 09:55
Last Modified:	21 Apr 2023 09:55
URI:	https://eprints.iisc.ac.in/id/eprint/81353

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