Adsorption of Methyl Orange from Aqueous Solution on Hydrothermal Synthesized Mg–Al Layered Double Hydroxide

In this study, we presented the efficiently adsorptive removal of organic dye, methyl orange (MO), from aqueous solution with the hydrothermal synthesized Mg–Al layered double hydroxide (LDH). The as-obtained product was characterized by X-ray diffraction (XRD), Fourier transformation infrared spect...

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Bibliographic Details
Published inJournal of chemical and engineering data Vol. 56; no. 11; pp. 4217 - 4225
Main Authors Ai, Lunhong, Zhang, Chunying, Meng, Lanying
Format Journal Article
LanguageEnglish
Published Washington, DC American Chemical Society 10.11.2011
Subjects
Chemistry
Exact sciences and technology
General and physical chemistry
Solid-liquid interface
Surface physical chemistry
Removal
Scanning electron microscopy
Aluminium Hydroxides
Fourier transformation
Liquid solid adsorption
Adsorption isotherm
Adsorption capacity
Surface structure
Infrared spectrometry
Hydrothermal synthesis
Adsorption
Layered double hydroxide
Azo dye
Morphology
Magnesium Hydroxides
Aqueous solution
Methyl orange
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Summary:In this study, we presented the efficiently adsorptive removal of organic dye, methyl orange (MO), from aqueous solution with the hydrothermal synthesized Mg–Al layered double hydroxide (LDH). The as-obtained product was characterized by X-ray diffraction (XRD), Fourier transformation infrared spectroscopy (FTIR), and scanning electron microscopy (SEM). The adsorption characteristics of MO onto the Mg–Al LDH were evaluated in a batch adsorption process and systematically investigated by different experimental parameters, such as initial dye concentration, contact time, and solution pH. The adsorption kinetics were analyzed by pseudofirst-order, pseudosecond-order, Elovich, intraparticle diffusion, and Boyd models, which were well-described by the pseudosecond-order model. The equilibrium adsorption data were interpreted using the Langmuir, Freundlich, and Temkin isotherm models, which fitted well to both the Langmuir and Freundlich models. The monolayer adsorption capacity of the Mg–Al LDH toward MO was found to be 0.453 mol·kg–1. These findings suggested that the LDH could be regarded as a promising adsorbent for the removal of anionic dye in wastewaters.
ISSN:0021-9568
1520-5134
DOI:10.1021/je200743u