Photodegradation and Adsorption of Fast Green FCF in Tio2-Chitin Suspension

Romeli, Fatimah Julia (2005) Photodegradation and Adsorption of Fast Green FCF in Tio2-Chitin Suspension. Masters thesis, Universiti Putra Malaysia.

[img] PDF
1131Kb

Abstract

The potential of chitin as co-adsorbent in the photocatalytic degradation of Fast Green in titanium dioxide suspension was investigated. The physico-chemical characteristics of chitin were studied using Analysis of Surface Area and Porosity (ASAP), Fourier Transform Infrared Spectroscopy (FTIR) and Scanning Electron Microscopy (SEM). The sorption study was first done and compared with titanium dioxide heterogeneous photocatalysis. The result of kinetics studies indicates that the sorption process was pH dependent and exothermic. The adsorption equilibrium was achieved after 60 minutes and the adsorption capacity increased as the dye concentration was increased. The kinetic data was tested for first and pseudo-second kinetic order models and was found to fit well to the latter, while the adsorption isotherm was found to agree well with the Langmuir equation assuming monolayer type adsorption.The photocatalytic degradation and adsorption of Fast Green from aqueous solution has been investigated in suspensions containing commercial titanium dioxide (Degussa P-25), chitin and mixture of titanium dioxide-chitin. The removals of Fast Green using a mixture of titanium dioxide-chitin were found to follow first order kinetic. The presence of chitin in titanium dioxide suspension enhanced the removal by two times higher. Fast Green removal using mixture of titanium dioxide-chitin under UV irradiation was found to be more efficient rather than illumination using titanium dioxide or chitin alone. The removal of Fast Green using chitin and a mixture of titanium dioxide-chitin were rapid for the first 30 minute and reached equilibrium after 1 hour. A synergy effect was observed with an increase in the apparent rate constant by 1.86 times. This was ascribed to an extended adsorption of Fast Green on chitin followed by a transfer to titanium dioxide where it is photocatalytically degraded. pH has significant effect on the adsorption and photodegradation properties of chitin and titanium dioxide surface. However, the effect of temperature on adsorption and photodegradation process using titanium dioxide-chitin mixture was minimal. This combined photocatalytic-adsorption system appears promising as an efficient accelerated removal process of organic pollutants from water.

Item Type:Thesis (Masters)
Subject:Chitin - Adsorption - Case studies
Subject:Titanium dioxide - Adsorption - Case studies
Chairman Supervisor:Professor Zulkarnain Zainal, PhD
Call Number:FS 2005 26
Faculty or Institute:Faculty of Science
ID Code:6238
Deposited By: Nur Izyan Mohd Zaki
Deposited On:12 May 2010 06:10
Last Modified:27 May 2013 07:28

Repository Staff Only: Edit item detail

Document Download Statistics

This item has been downloaded for since 12 May 2010 06:10.

View statistics for "Photodegradation and Adsorption of Fast Green FCF in Tio2-Chitin Suspension"


Universiti Putra Malaysia Institutional Repository

Universiti Putra Malaysia Institutional Repository is an on-line digital archive that serves as a central collection and storage of scientific information and research at the Universiti Putra Malaysia.

Currently, the collections deposited in the IR consists of Master and PhD theses, Master and PhD Project Report, Journal Articles, Journal Bulletins, Conference Papers, UPM News, Newspaper Cuttings, Patents and Inaugural Lectures.

As the policy of the university does not permit users to view thesis in full text, access is only given to the first 24 pages only.