Reduction of Chemical Demand of Oxygen and Organic Material from water contaminated with Amoxicillin through application of Air Micro-Nanobubbles

Abstract

Amoxicillin is used to treat certain infections caused by bacteria, such as pneumonia; bronchitis; gonorrhea; and infections of the ears, nose, throat, urinary tract and skin. The purpose of this research was to reduce the concentration of chemical demand of oxygen and organic material from water contaminated with amoxicillin at the laboratory level through the application of air micro-nanobubbles. The method used was pre-experimental. Three samples were elaborated with 3 different concentrations of amoxicillin per liter within deionized water. Amoxicillin concentrations were 0.5 g/L, 1 g/L and 2.5 g/L. Three treatments were done in the periods of 15 minutes (T1), 30 minutes (T2) and 45 minutes (T3).The elaborated samples had COD initial concentrations of 508.6 mg/L (S1), 711.8 mg/L (S2) y 1582.6 mg/L (S3) and organic matter initial concentrations of 531.7 mg/L O2 (S1), 703.4 mg/L O2 (S2) y 752.6 mg/L O2 (S3), which are considered by their concentrations as contaminated samples. Results of reduction were obtained to COD 6.9% (S1), 56.3% (S2), 68.6% (S3) and to organic matter 65.8% (S1), 55.7% (S2), 40.9% (S3) after the treatments. Therefore it was demonstrated that the micro-nano bubbles reduce the COD and organic matter in water.