Ni-Zn/CeO2 nanocomposites for enhanced adsorptive removal of 4-chlorophenol.
Environ Sci Pollut Res Int
; 31(39): 51934-51953, 2024 Aug.
Article
in En
| MEDLINE
| ID: mdl-39134794
ABSTRACT
Chlorophenols are one of the major organic pollutants responsible for the contamination of water bodies. This study explores the application of Ni-Zn/CeO2 nanocomposites, synthesized via the aqueous co-precipitation method, as effective adsorbents for the 4-chlorophenol removal from aqueous solutions. The nanocomposites' chemical and structural characteristics were assessed using different physical characterization methods, viz. X-ray diffraction, transmission electron microscopy, Fourier transform infrared spectroscopy, zeta potential, using a Box-Behnken design within response surface methodology, optimal conditions of pH 3, temperature 20 °C, contact time 120 min, adsorbent dosage 0.05 g, and 4-chlorophenol concentration 50 ppm are identified. Among the nanocomposites tested, NZC 201070, with 20% Ni and 10% Zn, achieves enhanced performance, removing 99.1% of 4-chlorophenol within 2 h. Adsorption kinetics follow the pseudo-second-order model and equilibrium data fit the Freundlich isotherm. Thermodynamic analysis indicates an exothermic and spontaneous process. The adsorption capacity of NZC 201070 shows significant enhancement, growing from 19.85 mg/g at 10 ppm to 96.33 mg/g at 50 ppm initial concentration. Physical characterization confirms NZC 201070's superior properties, including a high surface area of 118.471 m2/g. Evaluating economic viability, NZC 201070 demonstrates robust reusability, retaining 85% efficiency over eight regeneration cycles. These results highlight NZC 201070 as a promising adsorbent for effective and sustainable chlorophenol removal in water treatment.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Water Pollutants, Chemical
/
Zinc
/
Chlorophenols
/
Nanocomposites
Language:
En
Journal:
Environ Sci Pollut Res Int
Journal subject:
SAUDE AMBIENTAL
/
TOXICOLOGIA
Year:
2024
Document type:
Article
Affiliation country:
India
Country of publication:
Alemania