Electronic Theses and Dissertations

Identifier

61

Date

2010-04-28

Document Type

Thesis (Campus Access Only)

Degree Name

Master of Science

Major

Chemistry

Concentration

Analytical Chemistry

Committee Chair

TAREK R FARHAT

Committee Member

Yongmei Wang

Committee Member

Gary L Emmert

Abstract

In this thesis, the design and operation of a new mass transport technique, Rotational Hydrodynamic diffusion system, is presented. Rotational hydrodynamic diffusion system (RHDS) is a method that can be adapted for analytical laboratory analysis as well as industrial scale separation and purification. Although the RHDS is not an electrochemical technique, its concept is derived from hydrodynamic rotating disc electrode (RDE) voltammetry. A diffusion advantage gained using the RHDS is higher flux of probe molecules across the boundary (e.g. membrane or porous media) with increased rotation rate compared to the static two-half cell (THC) method. The detection mechanism of the RHDS opens the possibility to study mass transport properties of a large variety of molecules using different types of ultra thin membranes. Therefore, the RHDS is a potential alternative to the classical mass transport detection methods such as the THC, impedance spectroscopy, cyclic and rotating disc electrode voltammetry. In this research, the theoretical analysis on the rotational hydrodynamic flux is derived and compared to experimental flux measured using HCl, KCl, KNO3, Ni(NO3)2, LiCl, camphor sulfonic acid, and K3Fe(CN)6 ionic solutions. Values of effective diffusion coefficients of salts across NucleoporeÒ membranes of thickness 6.0 mm and 10 mm with pore size 0.1 mm and 0.2 mm respectively are presented and discussed.

Comments

Data is provided by the student.

Library Comment

Dissertation or thesis originally submitted to the local University of Memphis Electronic Theses & dissertation (ETD) Repository.

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