Bulletin of the Society of Sea Water Science, Japan
Online ISSN : 2185-9213
Print ISSN : 0369-4550
ISSN-L : 0369-4550
Original Paper
Quantification of Charge Density in Active Layers of Thin-film Composite Polyamide Reverse Osmosis Membranes Using a Quartz Crystal Microbalance
Rhohei TANAKAMifuyu HARADATasuma SUZUKIMasakazu NIINAE
Author information
JOURNAL FREE ACCESS

2017 Volume 71 Issue 2 Pages 97-102

Details
Abstract
The objective of this study was to measure the charge density in the polyamide active layer of a commercial reverse osmosis membrane. To achieve this objective, cesium ion(Cs)was chosen as a counter ion of the deprotonated carboxy group(R-COO), and the mass of Cs that associates with R-COO was measured with a quartz crystal microbalance(QCM). Experimental data showed that the charge density obtained in this study at the pH range between of 4.0-9.0 was in good agreement with those obtained using an existing method of Rutherford backscattering spectrometry(RBS). RBS is a powerful but not easily accessible technique. Therefore, the method investigated in this study can be used as a relatively easy and simple way that permits one to measure the charge density of polyamide active layers.
Content from these authors
© 2017 The Society of Sea Water Science, Japan
Previous article Next article
feedback
Top