Photocatalytic Degradation of Penicillin G from Simulated Wastewater Using the UV/ZnO Process: Isotherm and Kinetic Study

Overview

Journal J Environ Health Sci Eng

Publisher Springer

Date 2020 May 14

PMID 32399224

Citations 9

Authors

Soheila Chavoshan

Maryam Khodadadi

Negin Nasseh

Affiliations

Soon will be listed here.

Abstract

Purpose: Pharmaceutical contaminants, including antibiotics, present in the environment, especially water resources, are a main concern for human and environmental health due to their stability and non-degradability. Accordingly, the purpose of this study was to investigate the photocatalytic removal of penicillin G antibiotic from simulated wastewater using a photocatalytic process [UV/ZnO] in an isotherm and kinetic study.

Methods: In the current research, the ZnO nanoparticles [ZnO NPs] were initially characterized by scanning electron microscope [SEM] and X-ray diffraction [XRD]. Then, its efficiency was investigated in the photocatalytic degradation process of penicillin G. The evaluated parameters in the adsorption process penicillin G antibiotic were pH [1-5], penicillin G concentration [10-30 mgL], NP dosage [0.5-4.5 gL] and contact time [5 to 200 min]. Then, the effect of pH [3, 5, 7, 9, 11, and], penicillin G concentration [10-30 mgL], NP dosage [0.01-1.5 gL] and contact time [5 to 200 min] in the photocatalytic degradation (UV/ZnO) was studied. The residual penicillin G concentration was measured using a spectrophotometery at a wavelength of 283 nm.

Results: The results indicated that the penicillin G removal efficiency of photocatalytic process [UV/ZnO] using ZnO was 74.65% at the concentration of 10 mgL, the pH value of 5, the ZnO NP dosage of 0.1 gL and the contact time of 180 min, as well as the kinetics of degradation followed the pseudo-first-order kinetic model.

Conclusion: It can be concluded that the use of this process is appropriate an effective for the removal of the antibiotic pollutants.

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