Optimization, Kinetics, Thermodynamic and Arrhenius Model of the Removal of Ciprofloxacin by Internal Electrolysis with Fe-Cu and Fe-C Materials

The ciprofloxacin (CIP) removal ability of a Fe-Cu electrolytic material was examined with respect to pH (2–9), time (15–150 min), shaking speed (100–250 rpm), material mass (0.2–3 g/L), temperature (298, 308, 323) and initial CIP concentration (30–200 mg/L). The Fe-Cu electrolytic materials were fa...

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Bibliographic Details
Published in:Processes 2021-12, Vol.9 (12), p.2110
Main Authors: Do, Tra Huong, Ha, Xuan Linh, Duong, Thi Tu Anh, Nguyen, Phuong Chi, Hoang, Ngoc Bich, Tran, Thi Kim Ngan
Format: Article
Language:English
Subjects:
Adsorption
Antibiotics
Aqueous solutions
Ciprofloxacin
Composite materials
Drug resistance
Efficiency
Electrolysis
Electrolytes
Entropy
Iron
Kinetics
Optimization
Oxidation
pH effects
Pollutants
Shaking
Spectrum analysis
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Summary:The ciprofloxacin (CIP) removal ability of a Fe-Cu electrolytic material was examined with respect to pH (2–9), time (15–150 min), shaking speed (100–250 rpm), material mass (0.2–3 g/L), temperature (298, 308, 323) and initial CIP concentration (30–200 mg/L). The Fe-Cu electrolytic materials were fabricated by the chemical plating method, and Fe-C materials were mechanically mixed from iron powder and graphite. The results show that at a pH value of 3, shaking time 120 min, shaking speed 250 rpm, a mass of Fe-Cu, Fe-C material of 2 g/L and initial CIP concentration of 203.79 mg/L, the CIP removal efficiency of Fe-Cu material reached 90.25% and that of Fe-C material was 85.12%. The removal of CIP on Fe-Cu and Fe-C materials follows pseudo-first-order kinetics. The activation energy of CIP removal of Fe-Cu material is 14.93 KJ/mol and of Fe-C material is 16.87 KJ/mol. The positive ΔH proves that CIP removal is endothermic. A negative entropy of 0.239 kJ/mol and 0.235 kJ/mol (which is near zero and is also relatively positive) indicated the rapid removal of the CIP molecules into the removed products.
ISSN:2227-9717
2227-9717
DOI:10.3390/pr9122110