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Central composite design and genetic algorithm applied for the optimization of ultrasonic-assisted removal of malachite green by ZnO Nanorod-loaded activated carbon.

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Title: Central composite design and genetic algorithm applied for the optimization of ultrasonic-assisted removal of malachite green by ZnO Nanorod-loaded activated carbon.
Authors: Ghaedi, M.1 m_ghaedi@mail.yu.ac.ir, Azad, F. Nasiri1, Dashtian, K.1, Hajati, S.2, Goudarzi, A.3, Soylak, M.4
Source: Spectrochimica Acta Part A: Molecular & Biomolecular Spectroscopy. Oct2016, Vol. 167, p157-164. 8p.
Subjects: Genetic algorithms, Malachite green, Langmuir isotherms, Activated carbon, Fourier transform infrared spectroscopy, X-ray diffraction, Mass transfer, Surface morphology
Abstract: Maximum malachite green (MG) adsorption onto ZnO Nanorod-loaded activated carbon (ZnO-NR-AC) was achieved following the optimization of conditions, while the mass transfer was accelerated by ultrasonic. The central composite design (CCD) and genetic algorithm (GA) were used to estimate the effect of individual variables and their mutual interactions on the MG adsorption as response and to optimize the adsorption process. The ZnO-NR-AC surface morphology and its properties were identified via FESEM, XRD and FTIR. The adsorption equilibrium isotherm and kinetic models investigation revealed the well fit of the experimental data to Langmuir isotherm and pseudo-second-order kinetic model, respectively. It was shown that a small amount of ZnO-NR-AC (with adsorption capacity of 20 mg g − 1 ) is sufficient for the rapid removal of high amount of MG dye in short time (3.99 min). [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
Description
Abstract:Maximum malachite green (MG) adsorption onto ZnO Nanorod-loaded activated carbon (ZnO-NR-AC) was achieved following the optimization of conditions, while the mass transfer was accelerated by ultrasonic. The central composite design (CCD) and genetic algorithm (GA) were used to estimate the effect of individual variables and their mutual interactions on the MG adsorption as response and to optimize the adsorption process. The ZnO-NR-AC surface morphology and its properties were identified via FESEM, XRD and FTIR. The adsorption equilibrium isotherm and kinetic models investigation revealed the well fit of the experimental data to Langmuir isotherm and pseudo-second-order kinetic model, respectively. It was shown that a small amount of ZnO-NR-AC (with adsorption capacity of 20 mg g − 1 ) is sufficient for the rapid removal of high amount of MG dye in short time (3.99 min). [ABSTRACT FROM AUTHOR]
ISSN:13861425
DOI:10.1016/j.saa.2016.05.025