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| Adsorption-desorption behavior of doxycycline and its influencing factors in chicken manure |
| Received:January 15, 2018 |
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| KeyWord:doxycycline;adsorption;desorption;influencing factors;animal excrement |
| Author Name | Affiliation | E-mail | | WEI Rui-cheng | Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base of Ministry of Science and Technology, Key Laboratory for Agro-product Safety Risk Evaluation(Nanjing), Ministry of Agriculture, Institute of Food Safety and Nutrition, JAAS, Nanjing 210014, China | | | LUO Pan-pan | Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base of Ministry of Science and Technology, Key Laboratory for Agro-product Safety Risk Evaluation(Nanjing), Ministry of Agriculture, Institute of Food Safety and Nutrition, JAAS, Nanjing 210014, China | | | ZHANG Sheng-xin | Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base of Ministry of Science and Technology, Key Laboratory for Agro-product Safety Risk Evaluation(Nanjing), Ministry of Agriculture, Institute of Food Safety and Nutrition, JAAS, Nanjing 210014, China | | | ZHU Lei | Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base of Ministry of Science and Technology, Key Laboratory for Agro-product Safety Risk Evaluation(Nanjing), Ministry of Agriculture, Institute of Food Safety and Nutrition, JAAS, Nanjing 210014, China | | | BAO En-dong | College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, China | | | LI Zhao-jun | Institute of Agricultural Resources and Regional Planning, CAAS, Beijing 100081, China | | | WANG Ran | Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base of Ministry of Science and Technology, Key Laboratory for Agro-product Safety Risk Evaluation(Nanjing), Ministry of Agriculture, Institute of Food Safety and Nutrition, JAAS, Nanjing 210014, China | wangran@jaas.ac.cn |
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| Abstract: |
| The adsorption and desorption behaviors of the typical veterinary drug doxycycline in chicken manure under different conditions, i.e., solution pH (2~10) and ion solution (Ca2+, Na+, K+, Cl-, and NO3-), were studied through batch equilibrium test. The results showed that the doxycycline adsorption process presented a nonlinear shape, and the Freundlich equation fitted the adsorption and desorption behaviors in chicken manure well. The desorption capacity of doxycycline in chicken manure was related to the solution's pH and ionic strength. It was enhanced as the solution pH decreased below pH<6. Significant difference was found for solution pH values of 2 and 4 (P<0.05), whereas no significant difference was detected at pH ≥ 6. For the ionic concentration of 0.01 mol·L-1, the desorption rate of Ca2+ was much higher than those of Na+ and K+, but the difference was not significant. For the ionic concentration of 0.1 mol·L-1, the desorption capacities of NO3- and Ca2+ were significantly different (P<0.01) in the chicken manure. This research showed that acid rain and chemical fertilizer application in soil could increase the doxycycline desorption capacity in animal manure, leading to the risk of migration to terrestrial and aquatic environments. However, it will be helpful for the precipitation and degradation of residual antibiotics under acidic and ionic environment when dealing with manure. |
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