A study on the influence of pH changes during catalytic ozonation process on alumina, zeolites and activated carbons for the decolorization of Reactive Red-241

The current study focuses on a prime effect of pH changes in the catalytic ozonation process (COP) by using three main classes of catalysts such as zeolites (alumina-silicates), alumina (metal oxides), and activated carbons for decolorization of Reactive Red 241 (RR-241). The role of pH changes, poi...

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Autores principales:	Samra Sajjad, Amir Ikhlaq, Farhan Javed, Syed Waqas Ahmad, Fei Qi
Formato:	article
Lenguaje:	EN
Publicado:	IWA Publishing 2021
Materias:	activated carbon advanced oxidation process alumina catalytic ozonation zeolites Environmental technology. Sanitary engineering TD1-1066
Acceso en línea:	https://doaj.org/article/9e53c3da98c04bb9ad6cbc6336ad82bb
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spelling	oai:doaj.org-article:9e53c3da98c04bb9ad6cbc6336ad82bb2021-11-06T10:42:46ZA study on the influence of pH changes during catalytic ozonation process on alumina, zeolites and activated carbons for the decolorization of Reactive Red-2410273-12231996-973210.2166/wst.2020.609https://doaj.org/article/9e53c3da98c04bb9ad6cbc6336ad82bb2021-02-01T00:00:00Zhttp://wst.iwaponline.com/content/83/3/727https://doaj.org/toc/0273-1223https://doaj.org/toc/1996-9732The current study focuses on a prime effect of pH changes in the catalytic ozonation process (COP) by using three main classes of catalysts such as zeolites (alumina-silicates), alumina (metal oxides), and activated carbons for decolorization of Reactive Red 241 (RR-241). The role of pH changes, point of zero charges and the effect of catalyst dose on pH change was studied. The results reveal that the overall removal efficiency of RR-241 in the case of COPs was the highest compared with single ozonation process (at pH = 7 the efficiency was 80, 65 65.5 and 60% for AC/O3, Al2O3/O3, Zeolite/O3 and O3 respectively). At initial acidic pH 4, the highest pH variations in COPs and ozonation processes were observed. Moreover, the pH changes were not found to be significant near the point of zero charges of materials (pHpzc = 6.8, 8.4 and 8.8 for zeolite, activated carbons and Al2O3, respectively. The COP in the presence of activated carbon shows the highest removal efficiency (82%) at pH 7. The material dose effect indicates that increasing the amount of catalyst (from 1 gm to 2 gm) significantly leads to a change in the pH of the solution. Results reveal the prominent effect and significance of pH changes on the efficiency of COP to determine true catalytic efficiency.Samra SajjadAmir IkhlaqFarhan JavedSyed Waqas AhmadFei QiIWA Publishingarticleactivated carbonadvanced oxidation processaluminacatalytic ozonationzeolitesEnvironmental technology. Sanitary engineeringTD1-1066ENWater Science and Technology, Vol 83, Iss 3, Pp 727-738 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	activated carbon advanced oxidation process alumina catalytic ozonation zeolites Environmental technology. Sanitary engineering TD1-1066
spellingShingle	activated carbon advanced oxidation process alumina catalytic ozonation zeolites Environmental technology. Sanitary engineering TD1-1066 Samra Sajjad Amir Ikhlaq Farhan Javed Syed Waqas Ahmad Fei Qi A study on the influence of pH changes during catalytic ozonation process on alumina, zeolites and activated carbons for the decolorization of Reactive Red-241
description	The current study focuses on a prime effect of pH changes in the catalytic ozonation process (COP) by using three main classes of catalysts such as zeolites (alumina-silicates), alumina (metal oxides), and activated carbons for decolorization of Reactive Red 241 (RR-241). The role of pH changes, point of zero charges and the effect of catalyst dose on pH change was studied. The results reveal that the overall removal efficiency of RR-241 in the case of COPs was the highest compared with single ozonation process (at pH = 7 the efficiency was 80, 65 65.5 and 60% for AC/O3, Al2O3/O3, Zeolite/O3 and O3 respectively). At initial acidic pH 4, the highest pH variations in COPs and ozonation processes were observed. Moreover, the pH changes were not found to be significant near the point of zero charges of materials (pHpzc = 6.8, 8.4 and 8.8 for zeolite, activated carbons and Al2O3, respectively. The COP in the presence of activated carbon shows the highest removal efficiency (82%) at pH 7. The material dose effect indicates that increasing the amount of catalyst (from 1 gm to 2 gm) significantly leads to a change in the pH of the solution. Results reveal the prominent effect and significance of pH changes on the efficiency of COP to determine true catalytic efficiency.
format	article
author	Samra Sajjad Amir Ikhlaq Farhan Javed Syed Waqas Ahmad Fei Qi
author_facet	Samra Sajjad Amir Ikhlaq Farhan Javed Syed Waqas Ahmad Fei Qi
author_sort	Samra Sajjad
title	A study on the influence of pH changes during catalytic ozonation process on alumina, zeolites and activated carbons for the decolorization of Reactive Red-241
title_short	A study on the influence of pH changes during catalytic ozonation process on alumina, zeolites and activated carbons for the decolorization of Reactive Red-241
title_full	A study on the influence of pH changes during catalytic ozonation process on alumina, zeolites and activated carbons for the decolorization of Reactive Red-241
title_fullStr	A study on the influence of pH changes during catalytic ozonation process on alumina, zeolites and activated carbons for the decolorization of Reactive Red-241
title_full_unstemmed	A study on the influence of pH changes during catalytic ozonation process on alumina, zeolites and activated carbons for the decolorization of Reactive Red-241
title_sort	study on the influence of ph changes during catalytic ozonation process on alumina, zeolites and activated carbons for the decolorization of reactive red-241
publisher	IWA Publishing
publishDate	2021
url	https://doaj.org/article/9e53c3da98c04bb9ad6cbc6336ad82bb
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A study on the influence of pH changes during catalytic ozonation process on alumina, zeolites and activated carbons for the decolorization of Reactive Red-241

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