Co and Ni Double Substituted Zn-Fe Layered Double Hydroxide as 2D Nano-Adsorbent for Wastewater Treatment

Recently, several types of nanomaterials gained attention as promising nanoadsorbents to remove dyes from wastewater such as layered double hydroxides (LDHs). In this work, Fe-Zn-Co-Ni LDH was developed by the basic co-precipitation method. In order to emphasize and characterize the developing of th...

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Bibliographic Details
Published inKey engineering materials Vol. 922; pp. 193 - 213
Main Authors Shehata, Nabila, Mahmoud, Rehab, Gaber, Yasser, Mohamed, Hamdy F.M., Sayed, Heba
Format Journal Article
LanguageEnglish
Published Zurich Trans Tech Publications Ltd 08.06.2022
Subjects
Adsorbents
Adsorption
Cobalt
Crystallites
Dyes
Electron microscopes
Fourier transforms
Functional groups
Gram-positive bacteria
Hydroxides
Iron
Nanomaterials
Nickel
Wastewater treatment
X-ray diffraction
Zeta potential
Zinc
MO
Nano-Adsorbent
Adsorption
Wastewater Treatment
Fe-Zn-Co-Ni LDH
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Summary:Recently, several types of nanomaterials gained attention as promising nanoadsorbents to remove dyes from wastewater such as layered double hydroxides (LDHs). In this work, Fe-Zn-Co-Ni LDH was developed by the basic co-precipitation method. In order to emphasize and characterize the developing of this quaternary LDH, six techniques (x-ray diffraction (XRD), scan electron microscope (SEM), Fourier transforms infrared (FTIR), transmission electron microscope (TEM), zeta potential measurements) have been investigated. The LDH was studied for the uptake of anionic dye, methyl orange (MO), under numerous adsorption factors such as solution pH, contact time, dye initial concentration and adsorbent dosage, and. The XRD data states that the crystallite size of MO@LDH (93.1 nm) is increased compared with that of LDH (12.7 nm) owning to the adsorption of MO onto LDH surface. Two new peaks have appeared for the MO@LDH owning to the bending vibrations of the MO functional groups C-N and C-H. The highest adsorption capacity for the prepared MO@LDH was 418 mg/g and it reached the equilibrium state at 60 min. The adsorption kinetic was obeyed to the pseudo-first order model. Additionally, the LDH showed a positive antibacterial effect towards both Gram-negative and Gram-positive bacteria.
Bibliography:Special topic volume with invited peer-reviewed papers only
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ISSN:1013-9826
1662-9795
1662-9795
DOI:10.4028/p-tpns6c