Abstract：
Antibiotics and organic residues from Tetracycline (TC) and other pharmaceuticals administered to aquatic living organism have negative impacts on aquatic environment by killing-off non-target living organisms and developing antibiotic-resistant bacteria. In this study, Micro-Nano Bubble (MNB) system was used to remove TC residues. MNB system demonstrated good level of degradation efficiency, as resulted in experiment where in time of 100 min, the TC degraded at rate of 82.66% from its initial concentration of TC when the initial concentration was 1 mg/L. When the initial concentration was increased to 10 mg/L, MNB system degraded TC at 64.35% of their initial, this means MNB system demonstrated good level of efficiency for TC removal and indicated that it is more efficient in TC degradation under the conditions of low initial TC concentration and high availability of dissolved oxygen (DO). In the system as the temperature increased there was a significant decrease in DO saturation which was related to the TC complex structure that contain multiple function groups such as amino groups, hydroxyl and carboxyl which possess high strong affinity with oxygen that leads to their adsorption onto bubble surface. This study provides significant insights into the application of MNB system for the removal of organic residues within aquatic ecosystem and underscores the need for further exploration of MNB technology for environmental remediation.
摘要：
来自四环素（TC）和其他药物的抗生素和有机残留物通过杀死非目标活生物体和开发抗生素抗性细菌对水生环境具有负面影响。在这项研究中,使用微纳米气泡（MNB）系统去除TC残留物。MNB系统表现出良好的降解效率水平，作为实验的结果，在100分钟的时间，当初始浓度为1mg/L时，TC相对于其初始浓度的降解率为82.66％。当初始浓度增加到10mg/L时，MNB系统将TC降低到初始的64.35%，这意味着MNB系统显示出良好的TC去除效率水平，并表明在低初始TC浓度和高溶解氧（DO）的条件下，它在TC降解中更有效。在系统中，随着温度的升高，DO饱和度显着降低，这与包含氨基等多个官能团的TC复合物结构有关。羟基和羧基与氧具有很强的亲和力，导致它们吸附在气泡表面。这项研究为MNB系统在水生态系统中去除有机残留物的应用提供了重要见解，并强调了进一步探索MNB技术用于环境修复的必要性。
