Adsorption Performance of Modified Fly Ash for Copper Ion Removal from Aqueous Solution

The initial characteristics of Romanian fly ash from the CET II Holboca power plant show the feasibility of its application for the production of a new material with applicability in environmental decontamination. The material obtained was characterized using standard techniques: scanning electron m...

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Bibliographic Details
Published in:Water (Basel) 2021-01, Vol.13 (2), p.207
Main Authors: Buema, Gabriela, Harja, Maria, Lupu, Nicoleta, Chiriac, Horia, Forminte, Loredana, Ciobanu, Gabriela, Bucur, Daniel, Bucur, Roxana
Format: Article
Language:English
Subjects:
Activation analysis
Adsorbents
Adsorption
Aqueous solutions
Chemical precipitation
Chemisorption
Copper
Decontamination
Differential thermal analysis
Differential thermogravimetric analysis
Efficiency
Energy dispersive X ray analysis
Fly ash
Fourier analysis
Fourier transforms
Infrared analysis
Infrared spectroscopy
Ion concentration
Ions
Metals
Morphology
Neutron activation analysis
Power plants
Purification
Scanning electron microscopy
Sewage
Sodium hydroxide
Spectrum analysis
Systems analysis
Thermal analysis
Wastewater treatment
X ray analysis
X-ray diffraction
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Summary:The initial characteristics of Romanian fly ash from the CET II Holboca power plant show the feasibility of its application for the production of a new material with applicability in environmental decontamination. The material obtained was characterized using standard techniques: scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDX), instrumental neutron activation analysis (INAA), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), the Brunauer–Emmett–Teller (BET) surface area, and thermogravimetric differential thermal analysis (TG-DTA). The adsorption capacity of the obtained material was evaluated in batch systems with different values of the initial Cu(II) ion concentration, pH, adsorbent dose, and contact time in order to optimize the adsorption process. According to the experimental data presented in this study, the adsorbent synthesized has a high adsorption capacity for copper ions (qmax = 27.32–58.48 mg/g). The alkali treatment of fly ash with NaOH improved the adsorption capacity of the obtained material compared to that of the untreated fly ash. Based on the kinetics results, the adsorption of copper ions onto synthesized material indicated the chemisorption mechanism. Notably, fly ash can be considered an important beginning in obtaining new materials with applicability to wastewater treatment.
ISSN:2073-4441
2073-4441
DOI:10.3390/w13020207