Persulfate Process Activated by Homogeneous and Heterogeneous Catalysts for Synthetic Olive Mill Wastewater Treatment

Wastewaters from the olive oil industry are a regional environmental problem. Their phenolic content provides inherent toxicity, which reduces the treatment potential of conventional biological systems. In this study, Sulfate Radical based Advanced Oxidation Processes (SRbAOPs) are compared with adv...

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Autores principales:	Eva Domingues, Maria João Silva, Telma Vaz, João Gomes, Rui C. Martins
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	sulfate radical based advanced oxidation process synthetic olive mill wastewater toxicity homogeneous catalysis heterogeneous catalysis Hydraulic engineering TC1-978 Water supply for domestic and industrial purposes TD201-500
Acceso en línea:	https://doaj.org/article/fbde9b9b06904615afa7b59d1b5ae890
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spelling	oai:doaj.org-article:fbde9b9b06904615afa7b59d1b5ae8902021-11-11T19:54:23ZPersulfate Process Activated by Homogeneous and Heterogeneous Catalysts for Synthetic Olive Mill Wastewater Treatment10.3390/w132130102073-4441https://doaj.org/article/fbde9b9b06904615afa7b59d1b5ae8902021-10-01T00:00:00Zhttps://www.mdpi.com/2073-4441/13/21/3010https://doaj.org/toc/2073-4441Wastewaters from the olive oil industry are a regional environmental problem. Their phenolic content provides inherent toxicity, which reduces the treatment potential of conventional biological systems. In this study, Sulfate Radical based Advanced Oxidation Processes (SRbAOPs) are compared with advanced oxidation processes (namely Fenton’s peroxidation) as a depuration alternative. Synthetic olive mill wastewaters were submitted to homogeneous and heterogeneous SRbAOPs using iron sulfate and solid catalysts (red mud and Fe-Ce-O) as the source of iron (II). The homogenous process was optimized by testing different pH values, as well as iron and persulfate loads. At the best conditions (pH 5, 300 mg/L of iron and 600 mg/L of persulfate), it was possible to achieve 39%, 63% and 37% COD, phenolic compounds and TOC removal, respectively. The catalytic potential of a waste (red mud) and a laboratory material (Fe-Ce-O) was tested using heterogenous SRbAOPs. The best performance was achieved by Fe-Ce-O, with an optimal load of 1600 mg/L. At these conditions, 27%, 55% and 5% COD, phenolic compounds and TOC removal were obtained, respectively. Toxicity tests on <i>A. fischeri</i> and <i>L. sativum</i> showed no improvements in toxicity from the treated solutions when compared with the original one. Thus, SRbAOPs use a suitable technology for synthetic OMW.Eva DominguesMaria João SilvaTelma VazJoão GomesRui C. MartinsMDPI AGarticlesulfate radical based advanced oxidation processsynthetic olive mill wastewatertoxicityhomogeneous catalysisheterogeneous catalysisHydraulic engineeringTC1-978Water supply for domestic and industrial purposesTD201-500ENWater, Vol 13, Iss 3010, p 3010 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	sulfate radical based advanced oxidation process synthetic olive mill wastewater toxicity homogeneous catalysis heterogeneous catalysis Hydraulic engineering TC1-978 Water supply for domestic and industrial purposes TD201-500
spellingShingle	sulfate radical based advanced oxidation process synthetic olive mill wastewater toxicity homogeneous catalysis heterogeneous catalysis Hydraulic engineering TC1-978 Water supply for domestic and industrial purposes TD201-500 Eva Domingues Maria João Silva Telma Vaz João Gomes Rui C. Martins Persulfate Process Activated by Homogeneous and Heterogeneous Catalysts for Synthetic Olive Mill Wastewater Treatment
description	Wastewaters from the olive oil industry are a regional environmental problem. Their phenolic content provides inherent toxicity, which reduces the treatment potential of conventional biological systems. In this study, Sulfate Radical based Advanced Oxidation Processes (SRbAOPs) are compared with advanced oxidation processes (namely Fenton’s peroxidation) as a depuration alternative. Synthetic olive mill wastewaters were submitted to homogeneous and heterogeneous SRbAOPs using iron sulfate and solid catalysts (red mud and Fe-Ce-O) as the source of iron (II). The homogenous process was optimized by testing different pH values, as well as iron and persulfate loads. At the best conditions (pH 5, 300 mg/L of iron and 600 mg/L of persulfate), it was possible to achieve 39%, 63% and 37% COD, phenolic compounds and TOC removal, respectively. The catalytic potential of a waste (red mud) and a laboratory material (Fe-Ce-O) was tested using heterogenous SRbAOPs. The best performance was achieved by Fe-Ce-O, with an optimal load of 1600 mg/L. At these conditions, 27%, 55% and 5% COD, phenolic compounds and TOC removal were obtained, respectively. Toxicity tests on <i>A. fischeri</i> and <i>L. sativum</i> showed no improvements in toxicity from the treated solutions when compared with the original one. Thus, SRbAOPs use a suitable technology for synthetic OMW.
format	article
author	Eva Domingues Maria João Silva Telma Vaz João Gomes Rui C. Martins
author_facet	Eva Domingues Maria João Silva Telma Vaz João Gomes Rui C. Martins
author_sort	Eva Domingues
title	Persulfate Process Activated by Homogeneous and Heterogeneous Catalysts for Synthetic Olive Mill Wastewater Treatment
title_short	Persulfate Process Activated by Homogeneous and Heterogeneous Catalysts for Synthetic Olive Mill Wastewater Treatment
title_full	Persulfate Process Activated by Homogeneous and Heterogeneous Catalysts for Synthetic Olive Mill Wastewater Treatment
title_fullStr	Persulfate Process Activated by Homogeneous and Heterogeneous Catalysts for Synthetic Olive Mill Wastewater Treatment
title_full_unstemmed	Persulfate Process Activated by Homogeneous and Heterogeneous Catalysts for Synthetic Olive Mill Wastewater Treatment
title_sort	persulfate process activated by homogeneous and heterogeneous catalysts for synthetic olive mill wastewater treatment
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/fbde9b9b06904615afa7b59d1b5ae890
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_version_	1718431386662076416

Persulfate Process Activated by Homogeneous and Heterogeneous Catalysts for Synthetic Olive Mill Wastewater Treatment

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