Catalytic Oxidation of Methylene Blue by Attapulgite/TiO2

Methylene blue (MB) is a common pollutant in wastewater of printing and dyeing industry. At present, ozone oxidation is commonly used in the treatment of printing and dyeing wastewater. Ozone is used for oxidation reaction directly and indirectly. However, the reaction rate is not fast enough. In th...

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Autores principales:	Jianping Shang, Yu Jiang, Xiaoping Qin, Bin Zhao, Xuefei Li
Formato:	article
Lenguaje:	EN
Publicado:	Frontiers Media S.A. 2021
Materias:	titanium dioxide attapulgite methylene blue catalytic ozonation kinetics Environmental sciences GE1-350
Acceso en línea:	https://doaj.org/article/f39d9b40d44b45a796ea9647ee3aa01d
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spelling	oai:doaj.org-article:f39d9b40d44b45a796ea9647ee3aa01d2021-11-15T04:59:14ZCatalytic Oxidation of Methylene Blue by Attapulgite/TiO22296-665X10.3389/fenvs.2021.783313https://doaj.org/article/f39d9b40d44b45a796ea9647ee3aa01d2021-11-01T00:00:00Zhttps://www.frontiersin.org/articles/10.3389/fenvs.2021.783313/fullhttps://doaj.org/toc/2296-665XMethylene blue (MB) is a common pollutant in wastewater of printing and dyeing industry. At present, ozone oxidation is commonly used in the treatment of printing and dyeing wastewater. Ozone is used for oxidation reaction directly and indirectly. However, the reaction rate is not fast enough. In this study, the attapulgite (ATP) was modified by tetrabutyl titanate-ethanol solution. The TiO2/ATP nanocomposite with high catalytic activity was prepared. The synthesized samples were subjected to characterized by X-ray diffraction (XRD) and Fourier Transform infrared spectroscopy (FTIR). The morphology and particle size of the particles were observed by scanning electron microscopy (SEM). The TiO2/ATP nanocomposite was calcined at 300°C for 2 h, and the degradation rate of 80 mg/L methylene blue was 99.8%. The experimental results show that the ozone, temperature and mass transfer factors are excluded, and the effects of temperature, MB concentration and pH on the degradation of methylene blue are investigated. The optimal reaction conditions are as follows: The ozone concentration is 0.067 g/min; the ozone flow rate is 0.15 NL/min; the stirrer rotation speed is 550 r/min; the catalyst is 0.1 g; the temperature is 50°C; Based on the results, the reaction mechanism was derived and the kinetic study of the experiment was carried out.Jianping ShangYu JiangXiaoping QinBin ZhaoXuefei LiFrontiers Media S.A.articletitanium dioxideattapulgitemethylene bluecatalytic ozonationkineticsEnvironmental sciencesGE1-350ENFrontiers in Environmental Science, Vol 9 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	titanium dioxide attapulgite methylene blue catalytic ozonation kinetics Environmental sciences GE1-350
spellingShingle	titanium dioxide attapulgite methylene blue catalytic ozonation kinetics Environmental sciences GE1-350 Jianping Shang Yu Jiang Xiaoping Qin Bin Zhao Xuefei Li Catalytic Oxidation of Methylene Blue by Attapulgite/TiO2
description	Methylene blue (MB) is a common pollutant in wastewater of printing and dyeing industry. At present, ozone oxidation is commonly used in the treatment of printing and dyeing wastewater. Ozone is used for oxidation reaction directly and indirectly. However, the reaction rate is not fast enough. In this study, the attapulgite (ATP) was modified by tetrabutyl titanate-ethanol solution. The TiO2/ATP nanocomposite with high catalytic activity was prepared. The synthesized samples were subjected to characterized by X-ray diffraction (XRD) and Fourier Transform infrared spectroscopy (FTIR). The morphology and particle size of the particles were observed by scanning electron microscopy (SEM). The TiO2/ATP nanocomposite was calcined at 300°C for 2 h, and the degradation rate of 80 mg/L methylene blue was 99.8%. The experimental results show that the ozone, temperature and mass transfer factors are excluded, and the effects of temperature, MB concentration and pH on the degradation of methylene blue are investigated. The optimal reaction conditions are as follows: The ozone concentration is 0.067 g/min; the ozone flow rate is 0.15 NL/min; the stirrer rotation speed is 550 r/min; the catalyst is 0.1 g; the temperature is 50°C; Based on the results, the reaction mechanism was derived and the kinetic study of the experiment was carried out.
format	article
author	Jianping Shang Yu Jiang Xiaoping Qin Bin Zhao Xuefei Li
author_facet	Jianping Shang Yu Jiang Xiaoping Qin Bin Zhao Xuefei Li
author_sort	Jianping Shang
title	Catalytic Oxidation of Methylene Blue by Attapulgite/TiO2
title_short	Catalytic Oxidation of Methylene Blue by Attapulgite/TiO2
title_full	Catalytic Oxidation of Methylene Blue by Attapulgite/TiO2
title_fullStr	Catalytic Oxidation of Methylene Blue by Attapulgite/TiO2
title_full_unstemmed	Catalytic Oxidation of Methylene Blue by Attapulgite/TiO2
title_sort	catalytic oxidation of methylene blue by attapulgite/tio2
publisher	Frontiers Media S.A.
publishDate	2021
url	https://doaj.org/article/f39d9b40d44b45a796ea9647ee3aa01d
work_keys_str_mv	AT jianpingshang catalyticoxidationofmethylenebluebyattapulgitetio2 AT yujiang catalyticoxidationofmethylenebluebyattapulgitetio2 AT xiaopingqin catalyticoxidationofmethylenebluebyattapulgitetio2 AT binzhao catalyticoxidationofmethylenebluebyattapulgitetio2 AT xuefeili catalyticoxidationofmethylenebluebyattapulgitetio2
_version_	1718428842085842944

Catalytic Oxidation of Methylene Blue by Attapulgite/TiO2

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