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An improved hybrid strategy for online dosage of hydrogen peroxide in photo-Fenton processes

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10.1016/j.jece.2021.105235
 
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Yu, Xiangwei
Graells Sobré, MoisèsMés informacióMés informacióMés informació
Miralles Cuevas, Sara
Cabrera Reina, Alejandro
Pérez Moya, MontserratMés informacióMés informacióMés informació
Document typeArticle
Defense date2021-06
PublisherElsevier
Rights accessOpen Access
Attribution-NonCommercial-NoDerivs 3.0 Spain
Except where otherwise noted, content on this work is licensed under a Creative Commons license : Attribution-NonCommercial-NoDerivs 3.0 Spain
Abstract
This work addresses the challenge of designing H2O2 dosage strategies for improving photo-Fenton applications, as well as for further understanding the effect of the dosage. The developed strategy focuses on the limitations of the current solution schemes by adopting a hybrid methodology between open and closed loop approaches and it is based on three different stages: (i) one-shot initial H2O2 addition (ii) continuous H2O2 dosage until reaching a specific dissolved oxygen (DO) level and (iii) on-off control of H2O2 dosage using DO slope as control variable. The proposed strategy is validated in the remediation of a Paracetamol solution (100 mg L-1) and the results are assessed using H2O2 consumption and mineralization rate and level as performance criteria. The final tuning of the proposed strategy consists of: (i) only 40% of the stoichiometric H2O2 concentration, (ii) continuous feeding of H2O2 until a 4 mg L-1 DO concentration is attained, and (iii) on-off control dosage selecting DO slope set-points in 0.1 and 0.2 mg L-1 min-1. These scheme and settings show an improvement of the process performance by ~ 15% with respect to the same H2O2 amount in a single-addition. This work contributes to improving photo-Fenton operations and designing more efficient processes.
CitationYu, X. [et al.]. An improved hybrid strategy for online dosage of hydrogen peroxide in photo-Fenton processes. "Journal of environmental chemical engineering", Juny 2021, vol. 9, núm. 3, p. 105235:1-105235:8. 
URIhttp://hdl.handle.net/2117/346971
DOI10.1016/j.jece.2021.105235
ISSN2213-3437
Publisher versionhttps://www.sciencedirect.com/science/article/pii/S2213343721002128?via%3Dihub
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  • Doctorat en Enginyeria de Processos Químics - Articles de revista [74]
  • CEPIMA - Center for Process and Environment Engineering - Articles de revista [119]
  • Departament d'Enginyeria Química - Articles de revista [1.918]
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