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Insight into Photocatalytic Degradation of Amoxicillin by Biofabricated Granular Zinc Oxide Nanoparticle: Mechanism, Optimization and Toxicity Evaluation
International Journal of Environmental Research ( IF 3.2 ) Pub Date : 2021-04-15 , DOI: 10.1007/s41742-021-00331-3
Priyanka Debnath , Kamalesh Sen , Anupam Mondal , Arghadip Mondal , Naba Kumar Mondal

Amoxicillin trihydrate (AMX) is an antibiotic drug and their metabolism in aqueous phase produce adverse effects on environmental standards and human health. Present research discloses the remediation of AMX antibiotic by photocatalytic degradation using fabricated zinc oxide nanoparticles (ZnONPs). Zinc oxide behaves as an excellent n-type semiconducting material for its high band gap (~ 3.37 eV). In this investigation, the ZnONPs were synthesized biologically using banana peels extract as both reducing and capping agent. The effects of peel extract, precursor concentration and pH on ZnONPs synthesis were investigated and optimized using response surface methodology (RSM). Moreover, the synthesised nanoparticle was characterised by UV–Vis, FESEM-EDX, TEM, XRD, dynamic light scattering (DLS) and FTIR. The characteristics properties give confirmation about the spherical shape, crystalline nature of the synthesized nanoparticle. Results revealed that over 90% of AMX can be photocatalytically degraded in 120 min irradiation under UV-B irradiation. The rate of degradation of AMX was better agreed with the pseudo-second-order kinetics. The thermodynamics of the antibiotic degradation revealed that reactions were exothermic and spontaneous nature. Additionally, effective efficacy of antibiotic residues have been tested against E. coli bacteria and poor efficiency against bacteria was recorded. Finally, it can be suggested that the ZnONPs could be an effective semiconductor towards degradation of AMX from wastewater.



中文翻译:

纳米氧化锌颗粒生物降解光催化降解阿莫西林的机理,优化及毒性评价

阿莫西林三水合物(AMX)是一种抗生素药物,它们在水相中的代谢会对环境标准和人体健康产生不利影响。本研究公开了使用制造的氧化锌纳米颗粒(ZnONPs)通过光催化降解来修复AMX抗生素的方法。氧化锌因其高带隙(〜3.37 eV)而表现为出色的n型半导体材料。在这项研究中,ZnONPs是使用香蕉皮提取物作为还原剂和加帽剂进行生物合成的。使用响应表面方法(RSM)研究并优化了果皮提取物,前体浓度和pH对ZnONPs合成的影响。此外,合成的纳米粒子具有紫外可见,FESEM-EDX,TEM,XRD,动态光散射(DLS)和FTIR的特征。特征性质证实了所合成的纳米颗粒的球形,结晶性质。结果表明,在UV-B照射下120分钟内,超过90%的AMX可以被光催化降解。AMX的降解速率与拟二级动力学更好地吻合。抗生素降解的热力学表明反应是放热和自发的。此外,还测试了抗生素残留的有效功效 抗生素降解的热力学表明反应是放热和自发的。此外,已经测试了抗生素残留的有效功效 抗生素降解的热力学表明反应是放热和自发的。此外,还测试了抗生素残留的有效功效记录到大肠埃希菌和对细菌的效率差。最后,可以认为ZnONPs可能是一种有效的半导体,可以有效地降解废水中的AMX。

更新日期:2021-04-15
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