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| Risk assessment of antibiotics removal from aquaculture wastewater from fallow fields |
| Received:April 23, 2022 |
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| KeyWord:aquaculture wastewater;antibiotic sulfamethoxazole;removal contribution rate;risk assessment |
| Author Name | Affiliation | E-mail | | NIE Zhengxin | School of Energy and Environment, Southeast University, Nanjing 210096, China | | | JIANG Zhiyu | Jiangsu Environmental Protection Industry Technology Research Institute Co., Ltd., Nanjing 210096, China | | | LIU Yanqing | School of Energy and Environment, Southeast University, Nanjing 210096, China | | | CAO Xian | School of Energy and Environment, Southeast University, Nanjing 210096, China | | | LI Xianning | School of Energy and Environment, Southeast University, Nanjing 210096, China | lxn@seu.edu.cn |
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| Abstract: |
| Aquaculture wastewater is concentrated in winter and fallow fields need to be diverted and tempered in winter. This paper proposed a technical scheme to reuse aquaculture wastewater in fallow fields and analyzed the degradation of the typical antibiotic sulfamethoxazole(SMX) in wastewater in fallow fields. Meanwhile, a health risk analysis was carried out on the fallow fields in the demonstration area for the reuse of aquaculture wastewater. The results showed that soil microbial degradation was the main mechanism by which SMX was removed from wastewater, with a removal contribution rate of 65%-78%, whereas soil adsorption and plant uptake contributed less to the removal of SMX. At the genus level, Arthrobacter, Sphingomonas, and Bacillus were the dominant SMX-degrading genera. The removal efficiencies of TN, NO3--N, TP, and CODCr decreased with increasing SMX concentration. In fallow fields that consume aquaculture wastewater, the risk entropy of residual antibiotics to human health and soil ecosystems was less than 0.01, and the potential risks were negligible. |
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