Activation of persulfate by biochar for the degradation of phenolic compounds in aqueous systems

Advanced Oxidation Processes (AOPs) based on sulfate radicals (SR-AOPs) are efficient chemical methods for water and wastewater treatment gaining attention in the last years. In this study, the application of biochar (BC) matrix as an alternative carbon catalyst for the activation of persulfate (PS)...

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Autores principales:	Kleopatra Miserli, Dimitra Kogola, Irini Paraschoudi, Ioannis Konstantinou
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2022
Materias:	Persulfate Activation Biochar Water Wastewater Matrix constituents Chemical engineering TP155-156
Acceso en línea:	https://doaj.org/article/4a3bc2d9e2fb400c84ab34510b9afa31
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spelling	oai:doaj.org-article:4a3bc2d9e2fb400c84ab34510b9afa312021-11-24T04:35:07ZActivation of persulfate by biochar for the degradation of phenolic compounds in aqueous systems2666-821110.1016/j.ceja.2021.100201https://doaj.org/article/4a3bc2d9e2fb400c84ab34510b9afa312022-03-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2666821121001162https://doaj.org/toc/2666-8211Advanced Oxidation Processes (AOPs) based on sulfate radicals (SR-AOPs) are efficient chemical methods for water and wastewater treatment gaining attention in the last years. In this study, the application of biochar (BC) matrix as an alternative carbon catalyst for the activation of persulfate (PS) and degradation of phenol and phenolic transformation products was examined. BC/PS system was compared with BC/Fe2+/PS system however the presence of Fe2+ did not enhance greatly the degradation rate showing that biochar playing the major role in PS activation. The effect of various parameters, such as PS and BC dosing, pH, the presence of anions (Cl−, NO3−, HCO3−, HPO42−) and humic acids (HA), separately and in combination, at different concentration levels, simulating surface waters and wastewaters, in degradation kinetics was studied. Degradation of phenolics followed pseudo-first order kinetics in all cases and under optimum conditions, fast complete removal was achieved within few minutes. The presence of all anions studied decreased the removal rate of phenolics with HPO42− showing the greater inhibition. Moreover, humic acids, as representatives of natural organic matter (NOM), decrease phenolics degradation efficiency and in combination with anions showed the more pronounced inhibitory effect. In addition, scavenger quenching experiments with ethanol, tert-butanol and NaN3 confirmed the dominant role of 1O2 following by HO• radicals while sulfate (SO4•−) radicals contribute to a minor degree. Biochar loses progressively its activation efficiency after three cycles. The results of this study contribute to the development of analogous treatment technologies for the removal of phenol-based taste and odor compounds.Kleopatra MiserliDimitra KogolaIrini ParaschoudiIoannis KonstantinouElsevierarticlePersulfateActivationBiocharWaterWastewaterMatrix constituentsChemical engineeringTP155-156ENChemical Engineering Journal Advances, Vol 9, Iss , Pp 100201- (2022)
institution	DOAJ
collection	DOAJ
language	EN
topic	Persulfate Activation Biochar Water Wastewater Matrix constituents Chemical engineering TP155-156
spellingShingle	Persulfate Activation Biochar Water Wastewater Matrix constituents Chemical engineering TP155-156 Kleopatra Miserli Dimitra Kogola Irini Paraschoudi Ioannis Konstantinou Activation of persulfate by biochar for the degradation of phenolic compounds in aqueous systems
description	Advanced Oxidation Processes (AOPs) based on sulfate radicals (SR-AOPs) are efficient chemical methods for water and wastewater treatment gaining attention in the last years. In this study, the application of biochar (BC) matrix as an alternative carbon catalyst for the activation of persulfate (PS) and degradation of phenol and phenolic transformation products was examined. BC/PS system was compared with BC/Fe2+/PS system however the presence of Fe2+ did not enhance greatly the degradation rate showing that biochar playing the major role in PS activation. The effect of various parameters, such as PS and BC dosing, pH, the presence of anions (Cl−, NO3−, HCO3−, HPO42−) and humic acids (HA), separately and in combination, at different concentration levels, simulating surface waters and wastewaters, in degradation kinetics was studied. Degradation of phenolics followed pseudo-first order kinetics in all cases and under optimum conditions, fast complete removal was achieved within few minutes. The presence of all anions studied decreased the removal rate of phenolics with HPO42− showing the greater inhibition. Moreover, humic acids, as representatives of natural organic matter (NOM), decrease phenolics degradation efficiency and in combination with anions showed the more pronounced inhibitory effect. In addition, scavenger quenching experiments with ethanol, tert-butanol and NaN3 confirmed the dominant role of 1O2 following by HO• radicals while sulfate (SO4•−) radicals contribute to a minor degree. Biochar loses progressively its activation efficiency after three cycles. The results of this study contribute to the development of analogous treatment technologies for the removal of phenol-based taste and odor compounds.
format	article
author	Kleopatra Miserli Dimitra Kogola Irini Paraschoudi Ioannis Konstantinou
author_facet	Kleopatra Miserli Dimitra Kogola Irini Paraschoudi Ioannis Konstantinou
author_sort	Kleopatra Miserli
title	Activation of persulfate by biochar for the degradation of phenolic compounds in aqueous systems
title_short	Activation of persulfate by biochar for the degradation of phenolic compounds in aqueous systems
title_full	Activation of persulfate by biochar for the degradation of phenolic compounds in aqueous systems
title_fullStr	Activation of persulfate by biochar for the degradation of phenolic compounds in aqueous systems
title_full_unstemmed	Activation of persulfate by biochar for the degradation of phenolic compounds in aqueous systems
title_sort	activation of persulfate by biochar for the degradation of phenolic compounds in aqueous systems
publisher	Elsevier
publishDate	2022
url	https://doaj.org/article/4a3bc2d9e2fb400c84ab34510b9afa31
work_keys_str_mv	AT kleopatramiserli activationofpersulfatebybiocharforthedegradationofphenoliccompoundsinaqueoussystems AT dimitrakogola activationofpersulfatebybiocharforthedegradationofphenoliccompoundsinaqueoussystems AT iriniparaschoudi activationofpersulfatebybiocharforthedegradationofphenoliccompoundsinaqueoussystems AT ioanniskonstantinou activationofpersulfatebybiocharforthedegradationofphenoliccompoundsinaqueoussystems
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Activation of persulfate by biochar for the degradation of phenolic compounds in aqueous systems

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