Kinetic and isotherm insights of Diclofenac removal by sludge derived hydrochar

Sadish Oumabady; Paul Sebastian Selvaraj; Kalaiselvi Periasamy; Davamani Veeraswamy; Paulian Thankanadathi Ramesh; Thava Palanisami; Sangeetha Piriya Ramasamy

doi:10.1038/s41598-022-05943-z

Kinetic and isotherm insights of Diclofenac removal by sludge derived hydrochar

Sadish Oumabady
, Paul Sebastian Selvaraj^*
, Kalaiselvi Periasamy
, Davamani Veeraswamy
, Paulian Thankanadathi Ramesh
, Thava Palanisami
, Sangeetha Piriya Ramasamy

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

42 Citations (Scopus)

63 Downloads (Pure)

Abstract

Recently, hydrothermal carbonization emerges as the most viable option for the management of solid waste with high moisture content. Sludge derived hydrochar is used as an adsorbent for emerging contaminants or micro-pollutants in the domain of sustainability. Current study demonstrates the KOH activation of hydrochar produced from paper board mill sludge and evaluates its removal potential of a Non-steroidal anti-inflammatory drug, Diclofenac from aqueous solution. The activated hydrochars exhibited porous, spherical micro-structures with higher fraction of oxygenated functional groups paving way for the efficient adsorption of Diclofenac. The effect of initial Diclofenac concentration and contact time was ascertained using adsorption kinetics and isotherms. The adsorption kinetics exhibited second-order reaction for all adsorbents indicating higher coefficient of determination (R² > 0.9). The Diclofenac adsorption on hydrochars followed Langmuir isotherm model with the post-activated hydrochar recording a highest adsorption capacity of 37.23 mg g⁻¹ in 40 mg L⁻¹ initial Diclofenac concentration at 15 h equilibrium time.

Original language	English
Article number	2184
Journal	Scientific Reports
Volume	12
DOIs	https://doi.org/10.1038/s41598-022-05943-z
Publication status	Published - 09 Feb 2022
Externally published	Yes

Bibliographical note

Funding Information:
The authors would like to acknowledge ITC Ltd., (PSPD unit), Coimbatore for the financial aid. The laboratory experiments and characterization were carried out in Department of Environmental Sciences, Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu, India.

Publisher Copyright:
© 2022, The Author(s).

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10.1038/s41598-022-05943-zLicence: CC BY

Kinetic and isotherm insights of Diclofenac removal by sludge derived hydrochar
Copyright 2022 the authors. This is an open access article published under a Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium, provided the author and source are cited.
Final published version, 3.24 MBLicence: CC BY

Cite this

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title = "Kinetic and isotherm insights of Diclofenac removal by sludge derived hydrochar",

abstract = "Recently, hydrothermal carbonization emerges as the most viable option for the management of solid waste with high moisture content. Sludge derived hydrochar is used as an adsorbent for emerging contaminants or micro-pollutants in the domain of sustainability. Current study demonstrates the KOH activation of hydrochar produced from paper board mill sludge and evaluates its removal potential of a Non-steroidal anti-inflammatory drug, Diclofenac from aqueous solution. The activated hydrochars exhibited porous, spherical micro-structures with higher fraction of oxygenated functional groups paving way for the efficient adsorption of Diclofenac. The effect of initial Diclofenac concentration and contact time was ascertained using adsorption kinetics and isotherms. The adsorption kinetics exhibited second-order reaction for all adsorbents indicating higher coefficient of determination (R2 > 0.9). The Diclofenac adsorption on hydrochars followed Langmuir isotherm model with the post-activated hydrochar recording a highest adsorption capacity of 37.23 mg g−1 in 40 mg L−1 initial Diclofenac concentration at 15 h equilibrium time.",

author = "Sadish Oumabady and Selvaraj, \{Paul Sebastian\} and Kalaiselvi Periasamy and Davamani Veeraswamy and Ramesh, \{Paulian Thankanadathi\} and Thava Palanisami and Ramasamy, \{Sangeetha Piriya\}",

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AU - Selvaraj, Paul Sebastian

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AU - Veeraswamy, Davamani

AU - Ramesh, Paulian Thankanadathi

AU - Palanisami, Thava

AU - Ramasamy, Sangeetha Piriya

N1 - Funding Information: The authors would like to acknowledge ITC Ltd., (PSPD unit), Coimbatore for the financial aid. The laboratory experiments and characterization were carried out in Department of Environmental Sciences, Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu, India. Publisher Copyright: © 2022, The Author(s).

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N2 - Recently, hydrothermal carbonization emerges as the most viable option for the management of solid waste with high moisture content. Sludge derived hydrochar is used as an adsorbent for emerging contaminants or micro-pollutants in the domain of sustainability. Current study demonstrates the KOH activation of hydrochar produced from paper board mill sludge and evaluates its removal potential of a Non-steroidal anti-inflammatory drug, Diclofenac from aqueous solution. The activated hydrochars exhibited porous, spherical micro-structures with higher fraction of oxygenated functional groups paving way for the efficient adsorption of Diclofenac. The effect of initial Diclofenac concentration and contact time was ascertained using adsorption kinetics and isotherms. The adsorption kinetics exhibited second-order reaction for all adsorbents indicating higher coefficient of determination (R2 > 0.9). The Diclofenac adsorption on hydrochars followed Langmuir isotherm model with the post-activated hydrochar recording a highest adsorption capacity of 37.23 mg g−1 in 40 mg L−1 initial Diclofenac concentration at 15 h equilibrium time.

AB - Recently, hydrothermal carbonization emerges as the most viable option for the management of solid waste with high moisture content. Sludge derived hydrochar is used as an adsorbent for emerging contaminants or micro-pollutants in the domain of sustainability. Current study demonstrates the KOH activation of hydrochar produced from paper board mill sludge and evaluates its removal potential of a Non-steroidal anti-inflammatory drug, Diclofenac from aqueous solution. The activated hydrochars exhibited porous, spherical micro-structures with higher fraction of oxygenated functional groups paving way for the efficient adsorption of Diclofenac. The effect of initial Diclofenac concentration and contact time was ascertained using adsorption kinetics and isotherms. The adsorption kinetics exhibited second-order reaction for all adsorbents indicating higher coefficient of determination (R2 > 0.9). The Diclofenac adsorption on hydrochars followed Langmuir isotherm model with the post-activated hydrochar recording a highest adsorption capacity of 37.23 mg g−1 in 40 mg L−1 initial Diclofenac concentration at 15 h equilibrium time.

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Kinetic and isotherm insights of Diclofenac removal by sludge derived hydrochar

Abstract

Bibliographical note

ASJC Scopus subject areas

UN SDGs

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