Welcome To UTPedia

We would like to introduce you, the new knowledge repository product called UTPedia. The UTP Electronic and Digital Intellectual Asset. It stores digitized version of thesis, dissertation, final year project reports and past year examination questions.

Browse content of UTPedia using Year, Subject, Department and Author and Search for required document using Searching facilities included in UTPedia. UTPedia with full text are accessible for all registered users, whereas only the physical information and metadata can be retrieved by public users. UTPedia collaborating and connecting peoples with university’s intellectual works from anywhere.

Disclaimer - Universiti Teknologi PETRONAS shall not be liable for any loss or damage caused by the usage of any information obtained from this web site.Best viewed using Mozilla Firefox 3 or IE 7 with resolution 1024 x 768.

Comparative Studies of Titanium Silicate as Heavy Metal Removal Adsorbent Synthesized through Conventional and Hybrid Surfactant Template Techniques

Othman, Alimi Binti Othman (2009) Comparative Studies of Titanium Silicate as Heavy Metal Removal Adsorbent Synthesized through Conventional and Hybrid Surfactant Template Techniques. Masters thesis, UNIVERSITI TEKNOLOGI PETRONAS.

[img]
Preview
PDF
Download (3365Kb) | Preview

Abstract

Titanium silicate-1 (TS-1) has attracted much attention during the last decade because of its interesting catalytic and adsorption properties. Most of TS-1 synthesis methods require the use of a comparatively copious amount of a costly template such as tetra propyl ammonium hydroxide (TPAOH). Thus, an attempt to reduce the cost of TS-1 synthesis by an alternatively or at least lessen the concentration of TPAOH. Two reactants to precipitate TS in the template involving tetra-n-butyl titanate (TNBT) as titanium source and tetra ethyl ortho silicate (TEOS) as silica source were used as precursors. The results were compared with the TS sample prepared without sodium dodecyl sulphate (SDS) and with sample prepared with different Si/Ti ratios. Si/Ti ratio of 33:1 was chosen to prepare titanosilicate (TS) samples synthesized by the conventional method using TPAOH as surfactant and TS samples synthesized using SDS and TPAOH as hybrid surfactant. Characterization of TS samples has been achieved by using a Fourier transform infra-red (FTIR) spectroscope, x-ray diffraction (XRD) and scanning electron microscope (SEM) to show the degree of crystallinality, while UV-VISIBLE spectroscopy was used to confirm whether the Ti present in the TS is in the tetrahedral position or in the form of extra framework. It shows the presence of the characteristic band for TS at 960cm-1, confirming Si-O-Ti linkages present in all samples. Surface area and pore size distribution of TS samples were measured by nitrogen adsorption analysis. It was revealed that all TS produced by hybrid surfactant generated a higher surface area compared to conventional method. The nitrogen adsorption analysis shows that TS-hybrid synthesized using a mild condition ie. crystallized at room temperature and atmosphere pressure possesses a bimodal with fairly narrow pore size distribution. Batch experiment investigations utilizing Cu(II) and Pb(II) ions were conducted to examine the heavy metal removal capabilities of TS. The results showed that almost all of the TS produced by hybrid surfactant generated a higher metal ions uptake Qt, compared to conventional method. TS tempalated using hybrid surfactant offers a less costlier and less time-consuming route compared conventional methods.

Item Type: Thesis (Masters)
Subject: UNSPECIFIED
Divisions: Engineering > Chemical
Depositing User: Users 5 not found.
Date Deposited: 04 Jun 2012 10:14
Last Modified: 25 Jan 2017 09:44
URI: http://utpedia.utp.edu.my/id/eprint/2890

Actions (login required)

View Item View Item

Document Downloads

More statistics for this item...