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Degradation of folic acid wastewater by electro-Fenton with three-dimensional electrode and its kinetic study

The three-dimensional electro-Fenton method was used in the folic acid wastewater pretreatment process. In this study, we researched the degradation of folic acid and the effects of different parameters such as the air sparging rate, current density, pH and reaction time on chemical oxygen demand (C...

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Autores principales: Xiaochao, Gu, Xuebin, Lu, Jin, Tian, Xiaoyun, Li, Bin, Zhou, Xujing, Zheng, Jin, Xu
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society Publishing 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5792884/
https://www.ncbi.nlm.nih.gov/pubmed/29410807
http://dx.doi.org/10.1098/rsos.170926
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author Xiaochao, Gu
Xuebin, Lu
Jin, Tian
Xiaoyun, Li
Bin, Zhou
Xujing, Zheng
Jin, Xu
author_facet Xiaochao, Gu
Xuebin, Lu
Jin, Tian
Xiaoyun, Li
Bin, Zhou
Xujing, Zheng
Jin, Xu
author_sort Xiaochao, Gu
collection PubMed
description The three-dimensional electro-Fenton method was used in the folic acid wastewater pretreatment process. In this study, we researched the degradation of folic acid and the effects of different parameters such as the air sparging rate, current density, pH and reaction time on chemical oxygen demand (COD) removal in folic acid wastewater. A four-level and four-factor orthogonal test was designed and optimal reaction conditions to pretreat folic acid wastewater by three-dimensional electrode were determined: air sparge rate 0.75 l min(−1), current density 10.26 mA cm(−2), pH 5 and reaction time 90 min. Under these conditions, the removal of COD reached 94.87%. LC-MS results showed that the electro-Fenton method led to an initial folic acid decomposition into p-aminobenzoyl-glutamic acid (PGA) and xanthopterin (XA); then part of the XA was oxidized to pterine-6-carboxylic acid (PCA) and the remaining part of XA was converted to pterin and carbon dioxide. The kinetics analysis of the folic acid degradation process during pretreatment was carried out by using simulated folic acid wastewater, and it could be proved that the degradation of folic acid by using the three-dimensional electro-Fenton method was a second-order reaction process. This study provided a reference for industrial folic acid treatment.
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spelling pubmed-57928842018-02-06 Degradation of folic acid wastewater by electro-Fenton with three-dimensional electrode and its kinetic study Xiaochao, Gu Xuebin, Lu Jin, Tian Xiaoyun, Li Bin, Zhou Xujing, Zheng Jin, Xu R Soc Open Sci Chemistry The three-dimensional electro-Fenton method was used in the folic acid wastewater pretreatment process. In this study, we researched the degradation of folic acid and the effects of different parameters such as the air sparging rate, current density, pH and reaction time on chemical oxygen demand (COD) removal in folic acid wastewater. A four-level and four-factor orthogonal test was designed and optimal reaction conditions to pretreat folic acid wastewater by three-dimensional electrode were determined: air sparge rate 0.75 l min(−1), current density 10.26 mA cm(−2), pH 5 and reaction time 90 min. Under these conditions, the removal of COD reached 94.87%. LC-MS results showed that the electro-Fenton method led to an initial folic acid decomposition into p-aminobenzoyl-glutamic acid (PGA) and xanthopterin (XA); then part of the XA was oxidized to pterine-6-carboxylic acid (PCA) and the remaining part of XA was converted to pterin and carbon dioxide. The kinetics analysis of the folic acid degradation process during pretreatment was carried out by using simulated folic acid wastewater, and it could be proved that the degradation of folic acid by using the three-dimensional electro-Fenton method was a second-order reaction process. This study provided a reference for industrial folic acid treatment. The Royal Society Publishing 2018-01-17 /pmc/articles/PMC5792884/ /pubmed/29410807 http://dx.doi.org/10.1098/rsos.170926 Text en © 2018 The Authors. http://creativecommons.org/licenses/by/4.0/ Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited.
spellingShingle Chemistry
Xiaochao, Gu
Xuebin, Lu
Jin, Tian
Xiaoyun, Li
Bin, Zhou
Xujing, Zheng
Jin, Xu
Degradation of folic acid wastewater by electro-Fenton with three-dimensional electrode and its kinetic study
title Degradation of folic acid wastewater by electro-Fenton with three-dimensional electrode and its kinetic study
title_full Degradation of folic acid wastewater by electro-Fenton with three-dimensional electrode and its kinetic study
title_fullStr Degradation of folic acid wastewater by electro-Fenton with three-dimensional electrode and its kinetic study
title_full_unstemmed Degradation of folic acid wastewater by electro-Fenton with three-dimensional electrode and its kinetic study
title_short Degradation of folic acid wastewater by electro-Fenton with three-dimensional electrode and its kinetic study
title_sort degradation of folic acid wastewater by electro-fenton with three-dimensional electrode and its kinetic study
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5792884/
https://www.ncbi.nlm.nih.gov/pubmed/29410807
http://dx.doi.org/10.1098/rsos.170926
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