Campus Access Only

All rights reserved. This publication is intended for use solely by faculty, students, and staff of University of the Pacific. No part of this publication may be reproduced, distributed, or transmitted in any form or by any means, now known or later developed, including but not limited to photocopying, recording, or other electronic or mechanical methods, without the prior written permission of the author or the publisher.

Date of Award


Document Type


Degree Name

Master of Arts (M.A.)



First Advisor

Don C. DeVault


As far back as the time of Aristotle sand filters were used to purify water. However it was not until the time of Thompson and Way (1848), two English agricultural chemists, that the idea of actual exchange of ions was proposed. Ion exchange has been investigated extensively, resulting in applications to softening of water, purification of sugar, separation of compounds, recovery of metals, many pharmaceutical separations and many others.

It has been proposed that the internal diffusion should be related to the internal structure of the ion exchange resin. The object of this research was to measure the internal diffusion and relate it to the cross-linkage of the resin. It was suggested by Dr. Theodore Vermeulen of the Chemical Engineering Department, University of California. He proposed that the external diffusion could be eliminated by having a high rate of flow in the column. By measuring the width of the zone formed, the rate constant could be found. The rate constant is proportional to the diffusion rate.



Included in

Chemistry Commons