The objective of this study was to examine some of the mechanisms responsible for the
passage of organic and inorganic solutes through nanofiltration/reverse osmosis (NF/RO) membranes by running
permeation tests, developing hydraulic model and characterizing relevant membrane
properties. The materials used included Rhodamine-WT, a chemical with molecular weight
of 480 Daltons and approved for use as a tracer chemical in drinking water. It was used as a
surrogate for organic solutes. The inorganic solute studied was sodium arsenite, a
relatively common water contaminant, which is hard to remove by most conventional
water treatment techniques.
Permeation tests involved
lab-scale experiments performed with a closed-loop system consisting of two flatleaf cells connected in series. Analytical methods involved measuring
R-WT concentration using a Bowman Series 2 Luminescence
Spectrometer. An excitation wavelength of 555 nm and
an emission wavelength of 585 nm were used. The minimum detection level was 50 ng/L. Partition experiments and Rutherford Backscattering (RBS) are discussed. Includes 4 references, tables, figures.
| Edition : | Vol. - No. |
| File Size : | 1
file
, 470 KB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 8 |
| Published : | 03/01/2005 |
