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Chinese Agricultural Science Bulletin ›› 2019, Vol. 35 ›› Issue (27): 146-152.doi: 10.11924/j.issn.1000-6850.casb19030057

Special Issue: 水产渔业

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Sulfamethoxazole in Aquaculture Water by Orthogonal Experimental Design: Degradation Dynamics

  

  • Received:2019-03-15 Revised:2019-09-04 Accepted:2019-06-10 Online:2019-09-24 Published:2019-09-24

Abstract: In order to explore the natural degradation rule of sulfamethoxazole (SMZ) in aquaculture water, this experiment selected common factors in aquaculture water environmental (temperature, pH and open or cover system conditions), and explored influence of these three factors on the dynamic digestion of SMZ in natural aquaculture water through 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 is consistent with the first-order kinetic equation,and the half-life and elimination rate of SMZ in each treatment were calculated. The results showed that the variation range of SMZ half-life and its elimination rate in 18 treatment groups was 4.88-12.89-d, 28%-77%. Anova analysis showed that within the range of the experimental level, temperature and pH factors had a significant influence on SMZ elimination, but the influence of the open or cover condition was small. Therefore, properly adjusting the conditions of temperature and pH of aquaculture water was conducive to promoting SMZ degradation.