【摘要】 为了探究磺胺甲恶唑(sulfamethoxazole, SMZ)在渔业水体中的自然降解规律,本试验选取养殖水环境中常见的因素(温度、pH值、敞蔽条件),通过正交实验探究这3个因素对SMZ在自然养殖水体中消解动态的影响。试验初期各处理SMZ浓度保持一致,实验周期内定期取水样检测水体中SMZ的浓度变化,SMZ消解动态符合一级反应动力学方程,计算各处理中SMZ药物的半衰期和消除率。结果表明:18个处理组SMZ的半衰期及其消除率变化范围分别为4.88～12.89天、28%～77%。方差分析得出:在实验水平范围内,温度、pH值因素对SMZ的消解结果有显著影响,但敞蔽的影响较小。因此,适当提高养殖水体温度、调节水体pH值等条件均有利于促进SMZ的降解。更多还原

【Abstract】 To explore the natural degradation rule of sulfamethoxazole(SMZ) in aquaculture water, we selected common factors in aquaculture water environmental(temperature, pH value and open or cover system conditions), and studied the effects of these 3 factors on degradation dynamics of SMZ in natural aquaculture water by the orthogonal experiment. The SMZ concentration of each treatment remained consistent in the initial stage of the experiment; water samples were taken regularly to detect the change of SMZ concentration in water body, which was consistent with the first-order kinetic equation, and the half-life and the elimination rate of SMZ in each treatment were calculated. The results showed that: the variation range of half-life of SMZ and its elimination rate in 18 treatment groups was 4.88-12.89 days, 28%-77%, respectively. Anova analysis showed that: within the range of the experimental level, temperature and pH value had a significant influence on elimination of SMZ, but the influence of the open or cover condition was small. Therefore, properly improving the conditions of temperature and pH value of aquaculture water is conducive to promote the degradation of SMZ.更多还原