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Iron oxide-mediated photo-Fenton catalysis in the inactivation of enteric bacteria present in wastewater effluents at neutral pH.
Environmental Pollution ( IF 8.9 ) Pub Date : 2020-07-11 , DOI: 10.1016/j.envpol.2020.115181
L Fernández 1 , J González-Rodríguez 1 , M Gamallo 1 , Z Vargas-Osorio 2 , C Vázquez-Vázquez 3 , Y Piñeiro 3 , J Rivas 3 , G Feijoo 1 , M T Moreira 1
Affiliation  

The pressure on natural water resources associated with increasing water scarcity highlights the value of using reclaimed water through the development of efficient and environmentally friendly treatment technologies. In this work, the use of magnetic nanoparticles in photo-Fenton catalysis for water disinfection was considered to inactivate natural enteric bacteria present in municipal wastewater effluents under white light and neutral pH. The most recommended ranges were evaluated in key variables such as the loading and composition of nanoparticles (NPs), hydrogen peroxide (H2O2) concentration, the light source (UV and visible) and treatment time were evaluated in wastewater disinfection expressed in terms of total coliforms and Escherichia coli colony forming units (CFU). The magnetic separation of NPs allowed the disinfection process to be carried out in different cycles, facilitating the recovery of the nanocatalyst and avoiding its discharge with the treated effluent.



中文翻译:

在中性pH值下,废水中存在的肠细菌失活时,氧化铁介导的光芬顿催化失活。

与自然资源短缺有关的自然水资源压力加剧了通过开发高效,环保的处理技术而使用再生水的价值。在这项工作中,人们认为在光芬顿催化中使用磁性纳米颗粒进行水消毒可在白光和中性pH下灭活市政废水中存在的天然肠细菌。在关键变量中评估了最推荐的范围,如纳米颗粒的负载和组成,过氧化氢(H 2 O 2)浓度,光源(紫外线和可见光)以及在废水消毒中的处理时间。大肠菌群和大肠杆菌总数菌落形成单位(CFU)。NP的磁性分离使得消毒过程可以在不同的循环中进行,从而促进了纳米催化剂的回收并避免了其与处理后的废水一起排放。

更新日期:2020-07-16
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