Preparation of a Thermally Modified Diatomite and a Removal Mechanism for 1-Naphthol from Solution

XZ Yang; Yuezhou Zhang; LP Wang; LL Cao; Li KL; A Hursthouse

doi:10.3390/w9090651

Preparation of a Thermally Modified Diatomite and a Removal Mechanism for 1-Naphthol from Solution

XZ Yang, Yuezhou Zhang, LP Wang, LL Cao, Li KL, A Hursthouse

Pharmacy

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

9 Citations (Scopus)

Abstract

The adsorption of 1-naphthol (NAP) in aqueous solution was investigated using unmodified and modified diatomite at different temperature, pH, adsorbent mass and contact time. The adsorption capacity of the modified diatomite significantly improved (about 2 times at 298 K) compared to the unmodified diatomite. The adsorption showed a good fit with the Langmuir model. The further data analysis demonstrated that the adsorption of 1-NAP on both materials could be best described by the pseudo second-order kinetic model. The thermodynamic parameters, including Gibbs' free energy (Delta G), enthalpy (Delta H) and entropy changes (Delta S) were determined. It was observed that the Delta H values (less than 40 kJ/mol) was positive, which indicated that the adsorption process is endothermic, physical adsorption. The Delta G values were negative, indicating that the adsorption of 1-NAP onto raw and modified adsorbent was spontaneous.

Original language	Undefined/Unknown
Pages (from-to)	–
Number of pages	15
Journal	Water
Volume	9
Issue number	9
DOIs	https://doi.org/10.3390/w9090651
Publication status	Published - 2017
MoE publication type	A1 Journal article-refereed

Keywords

1-naphthol
diatomite
kinetic

Access to Document

10.3390/w9090651

Cite this

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title = "Preparation of a Thermally Modified Diatomite and a Removal Mechanism for 1-Naphthol from Solution",

abstract = "The adsorption of 1-naphthol (NAP) in aqueous solution was investigated using unmodified and modified diatomite at different temperature, pH, adsorbent mass and contact time. The adsorption capacity of the modified diatomite significantly improved (about 2 times at 298 K) compared to the unmodified diatomite. The adsorption showed a good fit with the Langmuir model. The further data analysis demonstrated that the adsorption of 1-NAP on both materials could be best described by the pseudo second-order kinetic model. The thermodynamic parameters, including Gibbs' free energy (Delta G), enthalpy (Delta H) and entropy changes (Delta S) were determined. It was observed that the Delta H values (less than 40 kJ/mol) was positive, which indicated that the adsorption process is endothermic, physical adsorption. The Delta G values were negative, indicating that the adsorption of 1-NAP onto raw and modified adsorbent was spontaneous.",

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T1 - Preparation of a Thermally Modified Diatomite and a Removal Mechanism for 1-Naphthol from Solution

AU - Yang, XZ

AU - Zhang, Yuezhou

AU - Wang, LP

AU - Cao, LL

AU - KL, Li

AU - Hursthouse, A

PY - 2017

Y1 - 2017

N2 - The adsorption of 1-naphthol (NAP) in aqueous solution was investigated using unmodified and modified diatomite at different temperature, pH, adsorbent mass and contact time. The adsorption capacity of the modified diatomite significantly improved (about 2 times at 298 K) compared to the unmodified diatomite. The adsorption showed a good fit with the Langmuir model. The further data analysis demonstrated that the adsorption of 1-NAP on both materials could be best described by the pseudo second-order kinetic model. The thermodynamic parameters, including Gibbs' free energy (Delta G), enthalpy (Delta H) and entropy changes (Delta S) were determined. It was observed that the Delta H values (less than 40 kJ/mol) was positive, which indicated that the adsorption process is endothermic, physical adsorption. The Delta G values were negative, indicating that the adsorption of 1-NAP onto raw and modified adsorbent was spontaneous.

AB - The adsorption of 1-naphthol (NAP) in aqueous solution was investigated using unmodified and modified diatomite at different temperature, pH, adsorbent mass and contact time. The adsorption capacity of the modified diatomite significantly improved (about 2 times at 298 K) compared to the unmodified diatomite. The adsorption showed a good fit with the Langmuir model. The further data analysis demonstrated that the adsorption of 1-NAP on both materials could be best described by the pseudo second-order kinetic model. The thermodynamic parameters, including Gibbs' free energy (Delta G), enthalpy (Delta H) and entropy changes (Delta S) were determined. It was observed that the Delta H values (less than 40 kJ/mol) was positive, which indicated that the adsorption process is endothermic, physical adsorption. The Delta G values were negative, indicating that the adsorption of 1-NAP onto raw and modified adsorbent was spontaneous.

KW - 1-naphthol

KW - diatomite

KW - kinetic

KW - 1-naphthol

KW - diatomite

KW - kinetic

KW - 1-naphthol

KW - diatomite

KW - kinetic

U2 - 10.3390/w9090651

DO - 10.3390/w9090651

M3 - Artikel

SN - 2073-4441

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JO - Water

JF - Water

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ER -