Preparation and characterization of novel mesoporous chitin blended MoO 3 -montmorillonite nanocomposite for Cu(II) and Pb(II) immobilization

A novel mesoporous chitin blended MoO -Montmorillonite nanocomposite was prepared through three-steps synthesis. First, chitin was extracted from prawn shell then MoO -MMT was prepared, and lastly, chitin was blended with MoO -MMT. Chitin-MoO -MMT was applied for the removal of Cu(II) and Pb(II) fro...

Full description

Saved in:
Bibliographic Details
Published in:International journal of biological macromolecules 2020-06, Vol.152, p.554
Main Authors: Heiba, Hany Fathy, Taha, Asia A, Mostafa, Alaa R, Mohamed, Laila A, Fahmy, Mamdouh A
Format: Article
Language:English
Subjects:
Adsorption
Bentonite - chemistry
Chitin - chemistry
Copper - chemistry
Diffusion
Hydrogen-Ion Concentration
Kinetics
Lead - chemistry
Microscopy, Electron, Scanning
Molybdenum - chemistry
Nanocomposites - chemistry
Particle Size
Spectroscopy, Fourier Transform Infrared
Surface Properties
Temperature
Thermodynamics
Waste Water - chemistry
Water Pollutants, Chemical - chemistry
Water Purification
X-Ray Diffraction
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A novel mesoporous chitin blended MoO -Montmorillonite nanocomposite was prepared through three-steps synthesis. First, chitin was extracted from prawn shell then MoO -MMT was prepared, and lastly, chitin was blended with MoO -MMT. Chitin-MoO -MMT was applied for the removal of Cu(II) and Pb(II) from wastewater. XRD characterization revealed MoO solubility in MMT interlayers, SEM showed a nanocomposite formation with sharp nanorods like-structure and length ranging from 60 to 77.7 nm. FTIR exhibited fundamental changes in the surface functional groups after adsorption. XPS analysis before and after adsorption showed the domination of chemical bonding with N and O. N adsorption-desorption isotherm displayed H -type hysteresis loop and a pore size diameter of 10.67 nm confirming the mesoporous nature. Adsorption efficiency was studied as a function of pH, time, metal concentration and adsorbent mass. Adsorption capacity (Q ) values were 19.03 and 15.92 mg.g for Cu(II) and Pb(II) respectively. The metal surface coverage mapping was 1.87 × 10^ and 4.34 × 10^ atoms/m for Cu(II) and Pb(II) respectively. Adsorption followed Langmuir isotherm and pseudo-second-order (PSO) kinetics suggesting a monolayer chemisorption domination. Intraparticle diffusion (IPD) model showed a boundary layer control. Thermodynamically, the adsorption was spontaneous and endothermic with activation energies 25.94 and 29.37 kJ.mol for Cu(II) and Pb(II) respectively.
ISSN:1879-0003