Mechanism and toxicity evaluation of catalytic ozonation over Cu/Ce–Al2O3 system aiming at degradation of humic acid in real wastewater

Abstract Humic acid (HA) is the main component of organic matter in effluent from wastewater treatment. The effective removal of HA is significant. In this study, a novel catalyst was prepared using a transition metal oxide as the active component and Al2O3 as a granular carrier. The mechanism of ca...

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Autores principales:	Xi Tang, Yifei Zhang, Weiqi Li, Jinju Geng, Hongqiang Ren, Ke Xu
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/070426862998478b8999a69ffd4c4819
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spelling	oai:doaj.org-article:070426862998478b8999a69ffd4c48192021-12-02T16:45:22ZMechanism and toxicity evaluation of catalytic ozonation over Cu/Ce–Al2O3 system aiming at degradation of humic acid in real wastewater10.1038/s41598-021-83804-x2045-2322https://doaj.org/article/070426862998478b8999a69ffd4c48192021-04-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-83804-xhttps://doaj.org/toc/2045-2322Abstract Humic acid (HA) is the main component of organic matter in effluent from wastewater treatment. The effective removal of HA is significant. In this study, a novel catalyst was prepared using a transition metal oxide as the active component and Al2O3 as a granular carrier. The mechanism of catalytic ozonation of HA under neutral pH conditions and its efficiency were investigated. Under the chosen conditions (an ozone concentration of 2.2 mg/L, 50 mg/L HA solution, catalyst dosage of 5 g/L and initial pH of 6.49), the Cu/Ce–Al2O3 bimetallic catalyst led to 54.79% TOC removal rate after 30 min; the removal rate by ozone alone was only 20.49%. The characteristics of organic compounds determined by FT-IR and GC–MS showed that organic compounds were degraded significantly by the catalytic treatment. The addition of catalysts could effectively degrade toxic intermediates and reduce the acute toxicity produced by ozonation. Humic acid substances were largely removed and transformed into biodegradable intermediates. This study proposes a new and efficient ozonation catalyst for practical applications in advanced wastewater treatment.Xi TangYifei ZhangWeiqi LiJinju GengHongqiang RenKe XuNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-13 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Xi Tang Yifei Zhang Weiqi Li Jinju Geng Hongqiang Ren Ke Xu Mechanism and toxicity evaluation of catalytic ozonation over Cu/Ce–Al2O3 system aiming at degradation of humic acid in real wastewater
description	Abstract Humic acid (HA) is the main component of organic matter in effluent from wastewater treatment. The effective removal of HA is significant. In this study, a novel catalyst was prepared using a transition metal oxide as the active component and Al2O3 as a granular carrier. The mechanism of catalytic ozonation of HA under neutral pH conditions and its efficiency were investigated. Under the chosen conditions (an ozone concentration of 2.2 mg/L, 50 mg/L HA solution, catalyst dosage of 5 g/L and initial pH of 6.49), the Cu/Ce–Al2O3 bimetallic catalyst led to 54.79% TOC removal rate after 30 min; the removal rate by ozone alone was only 20.49%. The characteristics of organic compounds determined by FT-IR and GC–MS showed that organic compounds were degraded significantly by the catalytic treatment. The addition of catalysts could effectively degrade toxic intermediates and reduce the acute toxicity produced by ozonation. Humic acid substances were largely removed and transformed into biodegradable intermediates. This study proposes a new and efficient ozonation catalyst for practical applications in advanced wastewater treatment.
format	article
author	Xi Tang Yifei Zhang Weiqi Li Jinju Geng Hongqiang Ren Ke Xu
author_facet	Xi Tang Yifei Zhang Weiqi Li Jinju Geng Hongqiang Ren Ke Xu
author_sort	Xi Tang
title	Mechanism and toxicity evaluation of catalytic ozonation over Cu/Ce–Al2O3 system aiming at degradation of humic acid in real wastewater
title_short	Mechanism and toxicity evaluation of catalytic ozonation over Cu/Ce–Al2O3 system aiming at degradation of humic acid in real wastewater
title_full	Mechanism and toxicity evaluation of catalytic ozonation over Cu/Ce–Al2O3 system aiming at degradation of humic acid in real wastewater
title_fullStr	Mechanism and toxicity evaluation of catalytic ozonation over Cu/Ce–Al2O3 system aiming at degradation of humic acid in real wastewater
title_full_unstemmed	Mechanism and toxicity evaluation of catalytic ozonation over Cu/Ce–Al2O3 system aiming at degradation of humic acid in real wastewater
title_sort	mechanism and toxicity evaluation of catalytic ozonation over cu/ce–al2o3 system aiming at degradation of humic acid in real wastewater
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/070426862998478b8999a69ffd4c4819
work_keys_str_mv	AT xitang mechanismandtoxicityevaluationofcatalyticozonationovercuceal2o3systemaimingatdegradationofhumicacidinrealwastewater AT yifeizhang mechanismandtoxicityevaluationofcatalyticozonationovercuceal2o3systemaimingatdegradationofhumicacidinrealwastewater AT weiqili mechanismandtoxicityevaluationofcatalyticozonationovercuceal2o3systemaimingatdegradationofhumicacidinrealwastewater AT jinjugeng mechanismandtoxicityevaluationofcatalyticozonationovercuceal2o3systemaimingatdegradationofhumicacidinrealwastewater AT hongqiangren mechanismandtoxicityevaluationofcatalyticozonationovercuceal2o3systemaimingatdegradationofhumicacidinrealwastewater AT kexu mechanismandtoxicityevaluationofcatalyticozonationovercuceal2o3systemaimingatdegradationofhumicacidinrealwastewater
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Mechanism and toxicity evaluation of catalytic ozonation over Cu/Ce–Al2O3 system aiming at degradation of humic acid in real wastewater

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