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Titolo:
Rejection of organic compounds by ultra-low pressure reverse osmosis membrane
Autore:
Ozaki, H; Li, HF;
Indirizzi:
Yamaguchi Univ, Fac Engn, Dept Civil Engn, Yamaguchi 7558611, Japan Yamaguchi Univ Yamaguchi Japan 7558611 il Engn, Yamaguchi 7558611, Japan Osaka Sangyo Univ, Dept Civil Engn, Osaka 5748530, Japan Osaka Sangyo Univ Osaka Japan 5748530 t Civil Engn, Osaka 5748530, Japan
Titolo Testata:
WATER RESEARCH
fascicolo: 1, volume: 36, anno: 2002,
pagine: 123 - 130
SICI:
0043-1354(200201)36:1<123:ROOCBU>2.0.ZU;2-Q
Fonte:
ISI
Lingua:
ENG
Soggetto:
NANOFILTRATION; REMOVAL;
Keywords:
ultra-low pressure reverse osmosis; organic compound; molecular weight; molecular size; dissociation constant;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
20
Recensione:
Indirizzi per estratti:
Indirizzo: Li, HF Yamaguchi Univ, Fac Engn, Dept Civil Engn, Yamaguchi 7558611, JapanYamaguchi Univ Yamaguchi Japan 7558611 , Yamaguchi 7558611, Japan
Citazione:
H. Ozaki e H.F. Li, "Rejection of organic compounds by ultra-low pressure reverse osmosis membrane", WATER RES, 36(1), 2002, pp. 123-130

Abstract

The introduction of ultra-low pressure reverse osmosis (ULPRO) membrane has widened the horizon of reverse osmosis (RO) in purification of surface water and wastewater as well as desalination of brackish water. The ULPRO membrane chemistry can provide a high water flux at low operating pressure, while maintaining a very good salt and organics rejection. This paper deals with the investigation on the rejection of low molecular weight organic compounds by ULPRO membrane. Laboratory scale experiments were carried out at apressure of 3 kg/cm(2) with a feed flow rate of 1.20 l/min. The rejection of undissociated organic compounds did not show a close relationship with the feed PH. The percentage removal of undissociated organic compounds increased linearly with the molecular weight as well as with the molecular width. The removal efficiency can be predicted by these relationships. But neither molecular weight nor molecular width can be considered as an absolute factor for rejection. The feed PH also influenced the removal efficiency of dissociated organic compounds. The efficiency decreased linearly with the increase in the dissociation constant. (C) 2001 Elsevier Science Ltd. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 09/04/20 alle ore 10:56:40