Wastewater treatment using photocatalysis: Destruction of methylene blue dye from wastewater streams

Photocatalytic processes have been suggested as an alternative treatment for water pollutants. Although presently many treatment methods are being used, most of them do not completely destroy the pollutants but only offer phase transfer or partial degradation of the pollutants. In photocatalytic...

Full description

Bibliographic Details
Main Authors:	Dennis P. Kumar, Abdul Rahman Mohamed, Subhash Bhatia
Format:	Article
Published:	2002
Online Access:	http://journalarticle.ukm.my/1394/ http://journalarticle.ukm.my/1394/

id	ukm-1394
recordtype	eprints
spelling	ukm-13942011-10-11T03:45:20Z http://journalarticle.ukm.my/1394/ Wastewater treatment using photocatalysis: Destruction of methylene blue dye from wastewater streams Dennis P. Kumar, Abdul Rahman Mohamed, Subhash Bhatia, Photocatalytic processes have been suggested as an alternative treatment for water pollutants. Although presently many treatment methods are being used, most of them do not completely destroy the pollutants but only offer phase transfer or partial degradation of the pollutants. In photocatalytic processes, a semiconductor photocatalyst is activated with ultraviolet (UV) irradiation. The activated photocatalyst promotes the formation of hydroxyl radicals, which in turn completely degrades the pollutants. In the present study, an ultraviolet irradiated photoreactor system was used to degrade methylene blue dye in aqueous solutions. The photocatalyst used was titanium dioxide (TiO2) Experiments were performed with varying catalyst loading, initial concentration of dye, circulation flow rate and air flow rate. Initial reaction rates of dye degradation were used to compare the effect of varying the above variables. The effect of increasing the catalyst loading from 0 to 0.4 wt% showed that an increase in the initial reaction rate, reaching an optimum at catalyst loading of 0.2 wt%. Effect of initial concentration has proven that lower initial concentration resulted in more efficient degradation of the dye. The increase in the initial reaction rate degradation with increasing circulation flow rate confirmed the significant role played by external mass transfer. Introduction of air to the system did not significantly increase in the initial reaction rate when the air flow rate was increased from 0 to 4.0 liter min-1 2002 Article PeerReviewed Dennis P. Kumar, and Abdul Rahman Mohamed, and Subhash Bhatia, (2002) Wastewater treatment using photocatalysis: Destruction of methylene blue dye from wastewater streams. Jurnal Kejuruteraan, 14 . http://www.ukm.my/jkukm/index.php/jkukm
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Kebangasaan Malaysia
building	UKM Institutional Repository
collection	Online Access
description	Photocatalytic processes have been suggested as an alternative treatment for water pollutants. Although presently many treatment methods are being used, most of them do not completely destroy the pollutants but only offer phase transfer or partial degradation of the pollutants. In photocatalytic processes, a semiconductor photocatalyst is activated with ultraviolet (UV) irradiation. The activated photocatalyst promotes the formation of hydroxyl radicals, which in turn completely degrades the pollutants. In the present study, an ultraviolet irradiated photoreactor system was used to degrade methylene blue dye in aqueous solutions. The photocatalyst used was titanium dioxide (TiO2) Experiments were performed with varying catalyst loading, initial concentration of dye, circulation flow rate and air flow rate. Initial reaction rates of dye degradation were used to compare the effect of varying the above variables. The effect of increasing the catalyst loading from 0 to 0.4 wt% showed that an increase in the initial reaction rate, reaching an optimum at catalyst loading of 0.2 wt%. Effect of initial concentration has proven that lower initial concentration resulted in more efficient degradation of the dye. The increase in the initial reaction rate degradation with increasing circulation flow rate confirmed the significant role played by external mass transfer. Introduction of air to the system did not significantly increase in the initial reaction rate when the air flow rate was increased from 0 to 4.0 liter min-1
format	Article
author	Dennis P. Kumar, Abdul Rahman Mohamed, Subhash Bhatia,
spellingShingle	Dennis P. Kumar, Abdul Rahman Mohamed, Subhash Bhatia, Wastewater treatment using photocatalysis: Destruction of methylene blue dye from wastewater streams
author_facet	Dennis P. Kumar, Abdul Rahman Mohamed, Subhash Bhatia,
author_sort	Dennis P. Kumar,
title	Wastewater treatment using photocatalysis: Destruction of methylene blue dye from wastewater streams
title_short	Wastewater treatment using photocatalysis: Destruction of methylene blue dye from wastewater streams
title_full	Wastewater treatment using photocatalysis: Destruction of methylene blue dye from wastewater streams
title_fullStr	Wastewater treatment using photocatalysis: Destruction of methylene blue dye from wastewater streams
title_full_unstemmed	Wastewater treatment using photocatalysis: Destruction of methylene blue dye from wastewater streams
title_sort	wastewater treatment using photocatalysis: destruction of methylene blue dye from wastewater streams
publishDate	2002
url	http://journalarticle.ukm.my/1394/ http://journalarticle.ukm.my/1394/
first_indexed	2023-09-18T19:33:12Z
last_indexed	2023-09-18T19:33:12Z
_version_	1777405098590208000

Wastewater treatment using photocatalysis: Destruction of methylene blue dye from wastewater streams

Similar Items