A Low-Cost Electrochemical Method for the Determination of Sulfadiazine in Aquaculture Wastewater

• Published in: International journal of environmental research and public health 2022-12, Vol.19 (24), p.16945
• Main Authors: Liu, Yang, Chen, Jianlei, Hu, Haiyan, Qu, Keming, Cui, Zhengguo
• Format: Article
• Language: English
• Subjects: Acetic acid; Analgesics; Anti-Bacterial Agents; Antibiotics; Aquaculture; Aquaculture effluents; Capillary electrophoresis; Carbon; Chemical sensors; Chloride; Chromatography; Electrochemical analysis; Electrochemical Techniques - methods; Electrochemistry; Electrodes; Environmental health; Environmental protection; Glassy carbon; Green development; Health risks; Humans; Hydrogen-Ion Concentration; Low cost; Metabolites; Methods; Microorganisms; Pollution detection; Potassium; Public health; Quantum dots; Reproducibility of Results; Scanning electron microscopy; Sensors; Sodium; Sodium acetate; Sulfadiazine; Voltammetry; Wastewater; Wastewater pollution
• ISSN: 1660-4601; 1661-7827; 1660-4601
• DOI: 10.3390/ijerph192416945

As the concept of green development spreads worldwide, environmental protection awareness for production and life has been continuously strengthened. Antibiotic residues in aquaculture wastewaters aggravate environmental pollution and threaten human health. Therefore, the detection of residual antibiotics in wastewater is crucial. In this paper, a new, simple, and low-cost method based on the glassy carbon electrode electrochemical sensor for the detection of sulfadiazine in aquaculture wastewater was developed without using complex materials to modify the electrode surface, to detect sulfadiazine which electrochemically oxidizes directly. The electrochemical performance of the sensor was studied and optimized with differential pulse voltammetry and cyclic voltammetry in the three-electrode system. The optimal electrolyte was acetic acid-sodium acetate buffer, and the optimal pH was 4.0. Finally, based on the optimized conditions, the newly established method showed satisfactory results for detecting sulfadiazine in aquaculture wastewater. The concentration of sulfadiazine and the peak current intensity showed a linear relationship in the range of 20 to 300 μmol/L, and the limit of detection was 6.14 μmol/L, the recovery rate of standard addition was 87-95%, with satisfactory reproducibility and low interference.