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Titolo:
Effect of functional groups of humic substances on UF performance
Autore:
Lin, CF; Liu, SH; Hao, OJ;
Indirizzi:
Natl Taiwan Univ, Grad Inst Environm Engn, Taipei, Taiwan Natl Taiwan Univ Taipei Taiwan Grad Inst Environm Engn, Taipei, Taiwan Univ Maryland, Dept Civil & Environm Engn, College Pk, MD 20742 USA Univ Maryland College Pk MD USA 20742 ronm Engn, College Pk, MD 20742 USA
Titolo Testata:
WATER RESEARCH
fascicolo: 10, volume: 35, anno: 2001,
pagine: 2395 - 2402
SICI:
0043-1354(200107)35:10<2395:EOFGOH>2.0.ZU;2-F
Fonte:
ISI
Lingua:
ENG
Soggetto:
NATURAL ORGANIC-MATTER; ULTRAFILTRATION MEMBRANE; NANOFILTRATION; CHLORINATION; PRETREATMENT; ADSORPTION; FLUX; PAC;
Keywords:
ultrafiltration; humic acids; carboxyl group; phenolic group; flux;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
26
Recensione:
Indirizzi per estratti:
Indirizzo: Lin, CF Natl Taiwan Univ, Grad Inst Environm Engn, Taipei, Taiwan Natl Taiwan Univ Taipei Taiwan st Environm Engn, Taipei, Taiwan
Citazione:
C.F. Lin et al., "Effect of functional groups of humic substances on UF performance", WATER RES, 35(10), 2001, pp. 2395-2402

Abstract

The role of different functional groups present in humic substances on themembrane flux is unclear. This study is undertaken to (1) separate the carboxyl and phenolic groups from a humic solution, and (2) evaluate the effect of each fractionated humic substances on the ultrafiltration (UF) performance. A weak-base amine resin was used for the adsorption (pH 7) and the subsequent desorption (pH 13) of the phenolic groups from a commercial humic solution. These fractions were evaluated qualitatively (via Fourier transform infrared spectroscopy) and quantitatively (titration); they were furthersubjected to the analyses of the trihalomethane formation potential (THMFP) and ultrafiltration performance. Although, a complete separation of the phenolic and carboxyl groups is not possible, the results nevertheless provide useful information about their effects on UF performance. The fraction with a higher content of the phenolic OH group exhibits the highest THMFP (190 mug/mg C), whereas the fraction with a higher content of the carboxyl groups exhibits more flux decline. The UF system evaluated is unable to remove a significant portion of THM precursors, resulting in high THMs in permeate. The use of powdered activated carbon for the pretreatment of these fractions fails to improve membrane fouling. The pore size of UF membrane does not appear to affect the membrane flux, and the switch from the hydrophobicto hydrophilic membrane only slight improves the permeate flux. (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 15/07/20 alle ore 05:28:10