Application of protein-functionalised aluminium nanosheets synthesised from sewage sludge for dye removal in a fixed-bed column: Investigation on design parameters and kinetic models

Protein-functionalised aluminium nanosheets (PRS–AlNs) were packed in a continuous fixed-bed column to remove crystal violet (CV) and Congo red (CR) dyes. A group of characterisation techniques, like SEM, TEM, AFM, XRD, BET, DSC and Raman spectroscopy, was performed for PRS–AlNs. The influence of se...

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Bibliographic Details
Published in:Environmental science and pollution research international 2020, Vol.27 (3), p.2955-2976
Main Authors: Ealias, Anu Mary, Saravanakumar, Manickam Puratchiveeran
Format: Article
Language:English
Subjects:
Adsorption
Aluminum
Aluminum - chemistry
Aquatic Pollution
Atmospheric Protection/Air Quality Control/Air Pollution
Color removal
Coloring Agents - chemistry
Design parameters
Dyes
Earth and Environmental Science
Ecotoxicology
Environment
Environmental Chemistry
Environmental Health
Environmental science
Flow rates
Flow velocity
Inlet flow
Models, Chemical
Nanosheets
Nanostructures
Proteins
Raman spectroscopy
Research Article
Sewage
Sewage sludge
Waste Water Technology
Water Management
Water Pollutants, Chemical
Water Pollution Control
Water Purification
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Summary:Protein-functionalised aluminium nanosheets (PRS–AlNs) were packed in a continuous fixed-bed column to remove crystal violet (CV) and Congo red (CR) dyes. A group of characterisation techniques, like SEM, TEM, AFM, XRD, BET, DSC and Raman spectroscopy, was performed for PRS–AlNs. The influence of several factors like bed depth (1, 2 and 3 cm), inlet dye concentration (50, 100 and 150 mg/L) and inlet flow rate (1.17, 2.26 and 3.34 mL/min) on the characteristics of the breakthrough profile of the adsorption process was examined at optimum pH 9.8 and 3.5 for CV and CR, respectively. The maximum adsorption capacity was achieved as 38.70 and 57.86 mg/g for CV and CR at 1 cm bed depth, 150 mg/L inlet concentration of the dye and 3.34 mL/min inlet rate of flow. The experimental data were analysed using kinetic models like the Yoon–Nelson, Adams–Bohart and Thomas models. Also, a detailed mechanism behind the CV and CR adsorption using PRS–AlNs was proposed in this research work. Graphical abstract .
ISSN:0944-1344
1614-7499
DOI:10.1007/s11356-019-07139-x