Amaly Noha, El-Moghazy Ahmed Y, Sun Gang, Pandey Pramod K
Department of Biological and Agricultural Engineering, University of California, Davis, USA; Polymeric Materials Research Department, Advanced Technology and New Materials Research Institute, City of Scientific Research and Technological Applications (SRTA-City), New Borg El-Arab City 21934, Alexandria, Egypt; Department of Population Health and Reproduction, School of Veterinary Medicine, University of California-Davis, USA.
Department of Biological and Agricultural Engineering, University of California, Davis, USA; Polymeric Materials Research Department, Advanced Technology and New Materials Research Institute, City of Scientific Research and Technological Applications (SRTA-City), New Borg El-Arab City 21934, Alexandria, Egypt.
J Colloid Interface Sci. 2021 Sep;597:9-20. doi: 10.1016/j.jcis.2021.03.165. Epub 2021 Apr 1.
Antibiotic residues from animal wastes enter underground and surface water streams, posing high risks to public health. Novel technologies capable of removing the residues from the matrix of concern such as animal waste should be developed. This research investigates the development of nanofiber absorbent for removing tetracycline (TC) antibiotic residues from liquid streams of dairy manure produced in a typical dairy farm. Hierarchically structured nanofibrous adsorbent was developed through growing a uniform polyaniline (PAni) nanodots on poly (vinyl alcohol-co-ethylene) (EVOH) nanofiber membrane (NFM). Moreover, Cu ions were chelated on the developed EVOH/PAni-Cl NFM to improve TC adsorption efficiency and selectivity. The TC adsorption capacities of EVOH/PAni-Cl-Cu and EVOH/PAni-Cl) NFM were 1100 mg g and 600 mg g within 120 min., respectively. The NFMs adsorption efficiency was investigated using dairy wastewater. Initial TC concentrations in dairy wastewater sample varied between 20 and 50 ppm. The EVOH/PAni-Cl-Cu NFM showed TC removal of 86% from dairy manure samples at 25 ppm initial TC concentration within 60 min. during batch mode treatment. Results showed that the dynamic binding efficiency of 450 mg g can be achieved at an initial TC concentration of 50 ppm. Furthermore, the NFM displayed efficient chemical and physical stability even after 8 cycles of reusing without significant changes in its performance or hazardous Cu leaching.
动物粪便中的抗生素残留进入地下水和地表水流，对公众健康构成高风险。应开发能够从动物粪便等相关基质中去除残留的新技术。本研究调查了用于从典型奶牛场产生的奶牛粪便液流中去除四环素（TC）抗生素残留的纳米纤维吸附剂的开发情况。通过在聚（乙烯醇 - 共 - 乙烯）（EVOH）纳米纤维膜（NFM）上生长均匀的聚苯胺（PAni）纳米点，开发出具有分层结构的纳米纤维吸附剂。此外，将铜离子螯合在已开发的EVOH/PAni-Cl NFM上，以提高TC吸附效率和选择性。EVOH/PAni-Cl-Cu和EVOH/PAni-Cl）NFM对TC的吸附容量在120分钟内分别为1100 mg/g和600 mg/g。使用奶牛场废水研究了NFM的吸附效率。奶牛场废水样品中的初始TC浓度在20至50 ppm之间变化。在分批模式处理期间，EVOH/PAni-Cl-Cu NFM在初始TC浓度为25 ppm时，60分钟内从奶牛粪便样品中去除了86%的TC。结果表明，在初始TC浓度为50 ppm时，动态结合效率可达450 mg/g。此外，即使经过8次重复使用，NFM仍表现出高效的化学和物理稳定性，其性能或有害铜浸出均无明显变化。
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