低圧逆浸透膜の開発と実用化
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概要
- 論文の詳細を見る
Improved thin-film composite low pressure reverse osmosis membrane has been developed. This membrane exhibits high salt and TOC rejection and high permeate flux at low operating pressures, combined with good choloramine resistance.<BR>The NTR-759 HR exhibits up to 99.5% NaCl rejection. 99.9% Na<SUB>2</SUB>SO<SUB>4</SUB> rejection and 96% isopropanol rejection, when tested at 1.5 MPa and 25°C on 1500 ppm solution. Ion rejection of this membrane at the low salt concentration depends drastically on pH. Accordingly this phenomenon suggests electrical charge affected by a small number of carboxylic acid in the membrane is important.<BR>Spiral wound modules incorporating this membrane has been used to produce ultrapure water.
- 日本膜学会の論文