The Effect of Light Wavelength on Water Quality in Photocatalytic Seawater Pre-treatment

Alternative pre-treatment of seawater via photocatalytic reaction is not well explored. Although titanium oxide (TiO2) is widely used in photocatalytic reaction, the application of other material especially from biomass ash is rare. In this research, the effect of light wavelength for seawater trea...

Full description

Bibliographic Details
Main Authors:	Weerana, Eh Kan, Ruzinah, Isha
Format:	Conference or Workshop Item
Language:	English
Published:	Universiti Malaysia Pahang 2016
Subjects:	TP Chemical technology
Online Access:	http://umpir.ump.edu.my/id/eprint/15047/ http://umpir.ump.edu.my/id/eprint/15047/ http://umpir.ump.edu.my/id/eprint/15047/1/P014%20pg89-94.pdf

id	ump-15047
recordtype	eprints
spelling	ump-150472017-12-14T04:28:51Z http://umpir.ump.edu.my/id/eprint/15047/ The Effect of Light Wavelength on Water Quality in Photocatalytic Seawater Pre-treatment Weerana, Eh Kan Ruzinah, Isha TP Chemical technology Alternative pre-treatment of seawater via photocatalytic reaction is not well explored. Although titanium oxide (TiO2) is widely used in photocatalytic reaction, the application of other material especially from biomass ash is rare. In this research, the effect of light wavelength for seawater treatment and the degradation of organic pollutants by using hybrid TiO2 photocatalyst supported by oil palm fiber ash (biomass ash) are studied. The photocatalyst which consisted of TiO2 and oil palm fiber ash weight ratio of 1:1 (i.e Ti:Ash 50:50) was synthesized via wet impregnation method. The Ti:Ash 50:50 photocatalyst was calcined at 500°C in the presence of air. The experiment was performed in a one litre borosilicate photocatalytic reactor. The percentage weight ratio of 1:400 for catalyst to seawater sample was set. The mixture of photocatalyst and water sample was stirred at 400 rpm to have homogenized distribution of the photocatalyst in the water. The investigation was carried out for two hours by exposing the reactor with either 365 nm or 420 nm mercury light. The photocatalyst was characterized by using N2 adsorption (BET) and UV/Vis/Nir to determine the specific surface area, pore volume and pore size and band gap energy of the catalyst respectively. The Ti:Ash 50:50 band gap energy was obtained at 3.1eV. This indicates that the catalyst was reactive when less than 385 nm light wavelength was used. The quality of initial and product seawater was analyzed via pH, conductivity, turbidity and chemical oxygen demand (COD). The small reduction of conductivity and COD obtained when using Ti:Ash 50:50 without light present shows the system was dominant by adsorption without no reaction. Higher reduction of conductivity, pH, turbidity and COD was achieved when the Ti:Ash 50:50 photocatalyst was exposed to 365 nm light wavelength than the Ti:Ash 50:50 photocatalyst that was exposed to 420 nm light wavelength. In addition, significant increment of water temperature (from 25°C to 100°C) was observed when 420 nm light wavelength was used. This leads to distillation dominated the process rather than photocatalytic reaction. It can be deduced that hybrid photocatalyst of Ti:Ash 50:50 has remarkable capabilities in pre-treatment and purify the seawater. The light wavelength also plays important role in adsorption behavior and photocatalytic activity of the catalyst. Universiti Malaysia Pahang 2016 Conference or Workshop Item PeerReviewed application/pdf en http://umpir.ump.edu.my/id/eprint/15047/1/P014%20pg89-94.pdf Weerana, Eh Kan and Ruzinah, Isha (2016) The Effect of Light Wavelength on Water Quality in Photocatalytic Seawater Pre-treatment. In: Proceedings of The National Conference for Postgraduate Research (NCON-PGR 2016), 24-25 September 2016 , Universiti Malaysia Pahang (UMP), Pekan, Pahang. pp. 89-94.. http://ee.ump.edu.my/ncon/wp-content/uploads/2016/10/Proceeding-NCON-PGR-2016.zip
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Malaysia Pahang
building	UMP Institutional Repository
collection	Online Access
language	English
topic	TP Chemical technology
spellingShingle	TP Chemical technology Weerana, Eh Kan Ruzinah, Isha The Effect of Light Wavelength on Water Quality in Photocatalytic Seawater Pre-treatment
description	Alternative pre-treatment of seawater via photocatalytic reaction is not well explored. Although titanium oxide (TiO2) is widely used in photocatalytic reaction, the application of other material especially from biomass ash is rare. In this research, the effect of light wavelength for seawater treatment and the degradation of organic pollutants by using hybrid TiO2 photocatalyst supported by oil palm fiber ash (biomass ash) are studied. The photocatalyst which consisted of TiO2 and oil palm fiber ash weight ratio of 1:1 (i.e Ti:Ash 50:50) was synthesized via wet impregnation method. The Ti:Ash 50:50 photocatalyst was calcined at 500°C in the presence of air. The experiment was performed in a one litre borosilicate photocatalytic reactor. The percentage weight ratio of 1:400 for catalyst to seawater sample was set. The mixture of photocatalyst and water sample was stirred at 400 rpm to have homogenized distribution of the photocatalyst in the water. The investigation was carried out for two hours by exposing the reactor with either 365 nm or 420 nm mercury light. The photocatalyst was characterized by using N2 adsorption (BET) and UV/Vis/Nir to determine the specific surface area, pore volume and pore size and band gap energy of the catalyst respectively. The Ti:Ash 50:50 band gap energy was obtained at 3.1eV. This indicates that the catalyst was reactive when less than 385 nm light wavelength was used. The quality of initial and product seawater was analyzed via pH, conductivity, turbidity and chemical oxygen demand (COD). The small reduction of conductivity and COD obtained when using Ti:Ash 50:50 without light present shows the system was dominant by adsorption without no reaction. Higher reduction of conductivity, pH, turbidity and COD was achieved when the Ti:Ash 50:50 photocatalyst was exposed to 365 nm light wavelength than the Ti:Ash 50:50 photocatalyst that was exposed to 420 nm light wavelength. In addition, significant increment of water temperature (from 25°C to 100°C) was observed when 420 nm light wavelength was used. This leads to distillation dominated the process rather than photocatalytic reaction. It can be deduced that hybrid photocatalyst of Ti:Ash 50:50 has remarkable capabilities in pre-treatment and purify the seawater. The light wavelength also plays important role in adsorption behavior and photocatalytic activity of the catalyst.
format	Conference or Workshop Item
author	Weerana, Eh Kan Ruzinah, Isha
author_facet	Weerana, Eh Kan Ruzinah, Isha
author_sort	Weerana, Eh Kan
title	The Effect of Light Wavelength on Water Quality in Photocatalytic Seawater Pre-treatment
title_short	The Effect of Light Wavelength on Water Quality in Photocatalytic Seawater Pre-treatment
title_full	The Effect of Light Wavelength on Water Quality in Photocatalytic Seawater Pre-treatment
title_fullStr	The Effect of Light Wavelength on Water Quality in Photocatalytic Seawater Pre-treatment
title_full_unstemmed	The Effect of Light Wavelength on Water Quality in Photocatalytic Seawater Pre-treatment
title_sort	effect of light wavelength on water quality in photocatalytic seawater pre-treatment
publisher	Universiti Malaysia Pahang
publishDate	2016
url	http://umpir.ump.edu.my/id/eprint/15047/ http://umpir.ump.edu.my/id/eprint/15047/ http://umpir.ump.edu.my/id/eprint/15047/1/P014%20pg89-94.pdf
first_indexed	2023-09-18T22:19:19Z
last_indexed	2023-09-18T22:19:19Z
_version_	1777415550029266944

The Effect of Light Wavelength on Water Quality in Photocatalytic Seawater Pre-treatment

Similar Items