Optimizing decolorization of methyl blue solution by two magnetic hydroxyapatite nanorods

Fan Zhang; Xiaoju Yin; Weihua Zhang; Yuefei Ji

doi:10.1016/j.jtice.2016.05.019

Optimizing decolorization of methyl blue solution by two magnetic hydroxyapatite nanorods

Fan Zhang, Xiaoju Yin, Weihua Zhang, Yuefei Ji

Electrical and Computer Engineering

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

17 Scopus citations

Abstract

In this study, the application of two magnetic hydroxyapatite nanorods Sr₅(PO₄)₃(OH)/Fe₃O₄ and Sr_5xBa_3x(PO₄)₃(OH)/Fe₃O₄, called SPF and SBPF for short, was investigated as effective adsorbents for removal of methyl blue (MB) from aqueous solution. Effects of three influence parameters (i.e., pH, temperature, and adsorbent dosage) were studied to optimize the adsorption processes. Kinetic data for both materials fitted well with pseudo-second-order kinetic model. The isotherm data agreed well with Langmuir model for SPF and Freundlich model for SBPF. The maximum adsorption capacity of SBPF nanorods (702mg/g) is higher than that of SPF (531mg/g), suggesting higher potential for MB removal. Thermodynamic studies indicated the adsorption process by these nanorods was spontaneous and exothermic. Moreover, these magnetic adsorbents can be easily recovered, and the capacity was maintained over 86% of the initial capacity after being used for five cycles. Mechanistic studies indicate that there are hydrogen bonding for MB-adsorbed SPF; whereas both hydrogen bonding and ionic interaction for MB-adsorbed SBPF. Interestingly, these magnetic nanorods show not only high adsorption capacity for MB but also facile regeneration from aqueous solution.

Original language	English (US)
Pages (from-to)	269-275
Number of pages	7
Journal	Journal of the Taiwan Institute of Chemical Engineers
Volume	65
DOIs	https://doi.org/10.1016/j.jtice.2016.05.019
State	Published - Aug 1 2016

Bibliographical note

Funding Information:
This work was financially supported by the National Natural Science Funds of China (Grant No. 51402153) and the Fundamental Research Funds for the Central Universities (Grant No.KJQN201553).

Publisher Copyright:
© 2016 Taiwan Institute of Chemical Engineers.

Keywords

Adsorption
Kinetic and isotherm models
Magnetic nanorods
Mechanism
Methyl blue

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10.1016/j.jtice.2016.05.019

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title = "Optimizing decolorization of methyl blue solution by two magnetic hydroxyapatite nanorods",

abstract = "In this study, the application of two magnetic hydroxyapatite nanorods Sr5(PO4)3(OH)/Fe3O4 and Sr5xBa3x(PO4)3(OH)/Fe3O4, called SPF and SBPF for short, was investigated as effective adsorbents for removal of methyl blue (MB) from aqueous solution. Effects of three influence parameters (i.e., pH, temperature, and adsorbent dosage) were studied to optimize the adsorption processes. Kinetic data for both materials fitted well with pseudo-second-order kinetic model. The isotherm data agreed well with Langmuir model for SPF and Freundlich model for SBPF. The maximum adsorption capacity of SBPF nanorods (702mg/g) is higher than that of SPF (531mg/g), suggesting higher potential for MB removal. Thermodynamic studies indicated the adsorption process by these nanorods was spontaneous and exothermic. Moreover, these magnetic adsorbents can be easily recovered, and the capacity was maintained over 86% of the initial capacity after being used for five cycles. Mechanistic studies indicate that there are hydrogen bonding for MB-adsorbed SPF; whereas both hydrogen bonding and ionic interaction for MB-adsorbed SBPF. Interestingly, these magnetic nanorods show not only high adsorption capacity for MB but also facile regeneration from aqueous solution.",

keywords = "Adsorption, Kinetic and isotherm models, Magnetic nanorods, Mechanism, Methyl blue",

author = "Fan Zhang and Xiaoju Yin and Weihua Zhang and Yuefei Ji",

note = "Funding Information: This work was financially supported by the National Natural Science Funds of China (Grant No. 51402153) and the Fundamental Research Funds for the Central Universities (Grant No.KJQN201553). Publisher Copyright: {\textcopyright} 2016 Taiwan Institute of Chemical Engineers.",

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doi = "10.1016/j.jtice.2016.05.019",

language = "English (US)",

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T1 - Optimizing decolorization of methyl blue solution by two magnetic hydroxyapatite nanorods

AU - Zhang, Fan

AU - Yin, Xiaoju

AU - Zhang, Weihua

AU - Ji, Yuefei

N1 - Funding Information: This work was financially supported by the National Natural Science Funds of China (Grant No. 51402153) and the Fundamental Research Funds for the Central Universities (Grant No.KJQN201553). Publisher Copyright: © 2016 Taiwan Institute of Chemical Engineers.

PY - 2016/8/1

Y1 - 2016/8/1

N2 - In this study, the application of two magnetic hydroxyapatite nanorods Sr5(PO4)3(OH)/Fe3O4 and Sr5xBa3x(PO4)3(OH)/Fe3O4, called SPF and SBPF for short, was investigated as effective adsorbents for removal of methyl blue (MB) from aqueous solution. Effects of three influence parameters (i.e., pH, temperature, and adsorbent dosage) were studied to optimize the adsorption processes. Kinetic data for both materials fitted well with pseudo-second-order kinetic model. The isotherm data agreed well with Langmuir model for SPF and Freundlich model for SBPF. The maximum adsorption capacity of SBPF nanorods (702mg/g) is higher than that of SPF (531mg/g), suggesting higher potential for MB removal. Thermodynamic studies indicated the adsorption process by these nanorods was spontaneous and exothermic. Moreover, these magnetic adsorbents can be easily recovered, and the capacity was maintained over 86% of the initial capacity after being used for five cycles. Mechanistic studies indicate that there are hydrogen bonding for MB-adsorbed SPF; whereas both hydrogen bonding and ionic interaction for MB-adsorbed SBPF. Interestingly, these magnetic nanorods show not only high adsorption capacity for MB but also facile regeneration from aqueous solution.

AB - In this study, the application of two magnetic hydroxyapatite nanorods Sr5(PO4)3(OH)/Fe3O4 and Sr5xBa3x(PO4)3(OH)/Fe3O4, called SPF and SBPF for short, was investigated as effective adsorbents for removal of methyl blue (MB) from aqueous solution. Effects of three influence parameters (i.e., pH, temperature, and adsorbent dosage) were studied to optimize the adsorption processes. Kinetic data for both materials fitted well with pseudo-second-order kinetic model. The isotherm data agreed well with Langmuir model for SPF and Freundlich model for SBPF. The maximum adsorption capacity of SBPF nanorods (702mg/g) is higher than that of SPF (531mg/g), suggesting higher potential for MB removal. Thermodynamic studies indicated the adsorption process by these nanorods was spontaneous and exothermic. Moreover, these magnetic adsorbents can be easily recovered, and the capacity was maintained over 86% of the initial capacity after being used for five cycles. Mechanistic studies indicate that there are hydrogen bonding for MB-adsorbed SPF; whereas both hydrogen bonding and ionic interaction for MB-adsorbed SBPF. Interestingly, these magnetic nanorods show not only high adsorption capacity for MB but also facile regeneration from aqueous solution.

KW - Adsorption

KW - Kinetic and isotherm models

KW - Magnetic nanorods

KW - Mechanism

KW - Methyl blue

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ER -

Optimizing decolorization of methyl blue solution by two magnetic hydroxyapatite nanorods

Abstract

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Keywords

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