Degradation of Dibutyl Phthalate Plasticizer in Water by High-Performance Iro2-Ta2O5/Ti Electrocatalytic Electrode

Dibutyl phthalate (DBP) in the presence of a wastewater system is harmful to the environment and interferes with the human’s endocrine system. For wastewater treatment, DBP is very difficult to be decomposed by biotechniques and many catalytic processes have been developed. Among them, the electroca...

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Autores principales:	Jia-Ming Xu, Shu-Hsien Chou, Ying Zhang, Mohanraj Kumar, Shan-Yi Shen
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	dibutyl phthalate electrocatalytic oxidation iridium-tantalum/titanium hydroxyl radical Chemical technology TP1-1185 Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/be7afc9bb3114ff298b37842bee16d8f
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spelling	oai:doaj.org-article:be7afc9bb3114ff298b37842bee16d8f2021-11-25T17:06:26ZDegradation of Dibutyl Phthalate Plasticizer in Water by High-Performance Iro<sub>2</sub>-Ta<sub>2</sub>O<sub>5</sub>/Ti Electrocatalytic Electrode10.3390/catal111113682073-4344https://doaj.org/article/be7afc9bb3114ff298b37842bee16d8f2021-11-01T00:00:00Zhttps://www.mdpi.com/2073-4344/11/11/1368https://doaj.org/toc/2073-4344Dibutyl phthalate (DBP) in the presence of a wastewater system is harmful to the environment and interferes with the human’s endocrine system. For wastewater treatment, DBP is very difficult to be decomposed by biotechniques and many catalytic processes have been developed. Among them, the electrocatalytic oxidation (EO) technique has been proven to possess high degradation efficiency of various organic compounds in wastewater. In this study, an electrocatalytic electrode of iridium-tantalum/titanium (IrO<sub>2</sub>-Ta<sub>2</sub>O<sub>5</sub>/Ti) was employed as the anode and graphite as the cathode to decompose DBP substances in the water. According to experimental results, the high removal efficiency of DBP and total organic carbon (TOC) of 90% and 56%, respectively, could be obtained under a voltage gradient of 10 V/cm for 60 min. Compared with other photocatalysis degradation, the IrO<sub>2</sub>-Ta<sub>2</sub>O<sub>5</sub>/Ti electrode could shorten about half the treatment time and electric power based on the same removal efficiency of DBP (i.e., photocatalysis requires 0.225~0.99 KWh). Results also indicated that the production of hydroxyl radical (•OH) in the electrocatalytic electrode played a key role for decomposing the DBP. Moreover, the pH and conductivity of water containing DBP were slightly changed and eventually remained in a stable state during the EO treatment. In addition, the removal efficiency of DBP could still remain about 90% after using the IrO<sub>2</sub>-Ta<sub>2</sub>O<sub>5</sub>/Ti electrode three times and the surface structure of the IrO<sub>2</sub>-Ta<sub>2</sub>O<sub>5</sub>/Ti electrode was stable.Jia-Ming XuShu-Hsien ChouYing ZhangMohanraj KumarShan-Yi ShenMDPI AGarticledibutyl phthalateelectrocatalytic oxidationiridium-tantalum/titaniumhydroxyl radicalChemical technologyTP1-1185ChemistryQD1-999ENCatalysts, Vol 11, Iss 1368, p 1368 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	dibutyl phthalate electrocatalytic oxidation iridium-tantalum/titanium hydroxyl radical Chemical technology TP1-1185 Chemistry QD1-999
spellingShingle	dibutyl phthalate electrocatalytic oxidation iridium-tantalum/titanium hydroxyl radical Chemical technology TP1-1185 Chemistry QD1-999 Jia-Ming Xu Shu-Hsien Chou Ying Zhang Mohanraj Kumar Shan-Yi Shen Degradation of Dibutyl Phthalate Plasticizer in Water by High-Performance Iro<sub>2</sub>-Ta<sub>2</sub>O<sub>5</sub>/Ti Electrocatalytic Electrode
description	Dibutyl phthalate (DBP) in the presence of a wastewater system is harmful to the environment and interferes with the human’s endocrine system. For wastewater treatment, DBP is very difficult to be decomposed by biotechniques and many catalytic processes have been developed. Among them, the electrocatalytic oxidation (EO) technique has been proven to possess high degradation efficiency of various organic compounds in wastewater. In this study, an electrocatalytic electrode of iridium-tantalum/titanium (IrO<sub>2</sub>-Ta<sub>2</sub>O<sub>5</sub>/Ti) was employed as the anode and graphite as the cathode to decompose DBP substances in the water. According to experimental results, the high removal efficiency of DBP and total organic carbon (TOC) of 90% and 56%, respectively, could be obtained under a voltage gradient of 10 V/cm for 60 min. Compared with other photocatalysis degradation, the IrO<sub>2</sub>-Ta<sub>2</sub>O<sub>5</sub>/Ti electrode could shorten about half the treatment time and electric power based on the same removal efficiency of DBP (i.e., photocatalysis requires 0.225~0.99 KWh). Results also indicated that the production of hydroxyl radical (•OH) in the electrocatalytic electrode played a key role for decomposing the DBP. Moreover, the pH and conductivity of water containing DBP were slightly changed and eventually remained in a stable state during the EO treatment. In addition, the removal efficiency of DBP could still remain about 90% after using the IrO<sub>2</sub>-Ta<sub>2</sub>O<sub>5</sub>/Ti electrode three times and the surface structure of the IrO<sub>2</sub>-Ta<sub>2</sub>O<sub>5</sub>/Ti electrode was stable.
format	article
author	Jia-Ming Xu Shu-Hsien Chou Ying Zhang Mohanraj Kumar Shan-Yi Shen
author_facet	Jia-Ming Xu Shu-Hsien Chou Ying Zhang Mohanraj Kumar Shan-Yi Shen
author_sort	Jia-Ming Xu
title	Degradation of Dibutyl Phthalate Plasticizer in Water by High-Performance Iro<sub>2</sub>-Ta<sub>2</sub>O<sub>5</sub>/Ti Electrocatalytic Electrode
title_short	Degradation of Dibutyl Phthalate Plasticizer in Water by High-Performance Iro<sub>2</sub>-Ta<sub>2</sub>O<sub>5</sub>/Ti Electrocatalytic Electrode
title_full	Degradation of Dibutyl Phthalate Plasticizer in Water by High-Performance Iro<sub>2</sub>-Ta<sub>2</sub>O<sub>5</sub>/Ti Electrocatalytic Electrode
title_fullStr	Degradation of Dibutyl Phthalate Plasticizer in Water by High-Performance Iro<sub>2</sub>-Ta<sub>2</sub>O<sub>5</sub>/Ti Electrocatalytic Electrode
title_full_unstemmed	Degradation of Dibutyl Phthalate Plasticizer in Water by High-Performance Iro<sub>2</sub>-Ta<sub>2</sub>O<sub>5</sub>/Ti Electrocatalytic Electrode
title_sort	degradation of dibutyl phthalate plasticizer in water by high-performance iro<sub>2</sub>-ta<sub>2</sub>o<sub>5</sub>/ti electrocatalytic electrode
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/be7afc9bb3114ff298b37842bee16d8f
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Degradation of Dibutyl Phthalate Plasticizer in Water by High-Performance Iro<sub>2</sub>-Ta<sub>2</sub>O<sub>5</sub>/Ti Electrocatalytic Electrode

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