Photocatalytic degradation of oxytetracycline using ZnO catalyst


YILDIZ S., TOPAL CANBAZ G., MIHÇIOKUR H.

ENVIRONMENTAL PROGRESS & SUSTAINABLE ENERGY, 2024 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Publication Date: 2024
  • Doi Number: 10.1002/ep.14384
  • Journal Name: ENVIRONMENTAL PROGRESS & SUSTAINABLE ENERGY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, PASCAL, Agricultural & Environmental Science Database, Applied Science & Technology Source, Aqualine, Aquatic Science & Fisheries Abstracts (ASFA), Biotechnology Research Abstracts, Chemical Abstracts Core, Compendex, Computer & Applied Sciences, Environment Index, Greenfile, INSPEC, Pollution Abstracts
  • Erciyes University Affiliated: Yes

Abstract

In the present study, the degradation of oxytetracycline (OTC) under ultraviolet (UV) light in the presence of ZnO catalyst was investigated, and optimum parameters for degradation efficiency were determined. Different pH values, ZnO dosages, reaction times, OTC concentrations, and UV lights were used in this study. The optimum conditions found were as follows: pH 4, ZnO 1 g L-1, reaction time 25 min, and OTC concentration 10 mg L-1. Degradation efficiency was 42.1%, 76%, 70.7%, and 61.7% for ZnO and photocatalytic (for UV-A, UV-B, and UV-C) degradation at optimal conditions, respectively. The resulting products after the photocatalytic oxidation of OTC were determined in the study. To identify the toxicity of degradation products and OTC, the lowest LC 50 (50% lethal concentration) and EC 50 (50% effective concentration) values were found. The resulting ethanamine, 2-(2,6-dimethylphenoxy)-N-methyl- by-products were observed to be more toxic than OTC. Furthermore, it was seen that isopropoxy carbamic acid, ethyl ester by-products were formed, whose presence is environmentally risky for aquatic environments due to their low EC50 values.