AQUATIC SOLUBLE UNREACTIVE PHOSPHORUS - CONCENTRATION BY ULTRAFILTRATION AND REVERSE-OSMOSIS MEMBRANES

Citation
Ma. Nanny et al., AQUATIC SOLUBLE UNREACTIVE PHOSPHORUS - CONCENTRATION BY ULTRAFILTRATION AND REVERSE-OSMOSIS MEMBRANES, Water research, 28(6), 1994, pp. 1355-1365
Citations number
20
Categorie Soggetti
Engineering, Civil","Environmental Sciences","Water Resources
Journal title
ISSN journal
00431354
Volume
28
Issue
6
Year of publication
1994
Pages
1355 - 1365
Database
ISI
SICI code
0043-1354(1994)28:6<1355:ASUP-C>2.0.ZU;2-7
Abstract
Ultrafiltration (UF) and reverse osmosis (RO) membranes were used to c oncrete and molecular size fractionate soluble unreactive phosphorus ( SUP) present in lake water. Qualitative behavior of the UF and RO memb ranes with SUP was examined using the model SUP compounds: highly poly merized DNA, degraded DNA, inositol hexaphosphate and orthophosphate. To concentrate and molecular size fractionate SUP in lake water, UF an d RO membranes were placed in series and the larger pore sized membran e preceding the smaller pore sized membrane. Six different membrane se quence configurations were examined. The percent SUP recovery of twent y lake water samples collected over a year ranged from 16 to 100%. The present SUP recovery was examined as a function of the membrane seque nce used, volume concentration factor, the initial SUP concentration w as the only major factor for SUP recovery. Calculated permeation facto rs for each sample illustrate that seasonal changes in the SUP composi tion may be occurring.