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Titolo:
Preliminary toxicity assessment of water after treatment with UV-irradiation and UVC/H2O2
Autore:
Parkinson, A; Barry, MJ; Roddick, FA; Hobday, MD;
Indirizzi:
RMIT Univ, Dept Chem & Met Engn, Melbourne, Vic 3001, Australia RMIT UnivMelbourne Vic Australia 3001 gn, Melbourne, Vic 3001, Australia Victoria Univ Technol, Sch Life Sci & Technol, Melbourne, Vic 8001, Australia Victoria Univ Technol Melbourne Vic Australia 8001 e, Vic 8001, Australia RMIT Univ, Dept Appl Chem, Melbourne, Vic 3001, Australia RMIT Univ Melbourne Vic Australia 3001 em, Melbourne, Vic 3001, Australia
Titolo Testata:
WATER RESEARCH
fascicolo: 15, volume: 35, anno: 2001,
pagine: 3656 - 3664
SICI:
0043-1354(200110)35:15<3656:PTAOWA>2.0.ZU;2-U
Fonte:
ISI
Lingua:
ENG
Soggetto:
ION-SELECTIVE ELECTRODE; DAPHNIA-MAGNA; ORGANIC-MATTER; COPPER; SPECIATION; METALS; DEGRADATION; CALIBRATION; SUBSTANCES;
Keywords:
NOM; water treatment; microtox (TM); Daphnia carinata; cytotoxic activity; photooxidation; UVC; UVB; UVA; UVC/H2O2; Cu-ISE; Chelex 100; DTPA;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
31
Recensione:
Indirizzi per estratti:
Indirizzo: Roddick, FA RMIT Univ, Dept Chem & Met Engn, GPO Box 2476V, Melbourne, Vic3001, Australia RMIT Univ GPO Box 2476V Melbourne Vic Australia 3001 Australia
Citazione:
A. Parkinson et al., "Preliminary toxicity assessment of water after treatment with UV-irradiation and UVC/H2O2", WATER RES, 35(15), 2001, pp. 3656-3664

Abstract

Photooxidation (UV radiation) and enhanced photooxidation. (UVC/H2O2) are water treatment technologies which remove aquatic natural organic matter (NOM) by photodegradation, producing lower molecular weight components and CO2. Since these technologies are being investigated for the treatment of drinking water, knowledge of the potential toxicity of the photooxidation by-products is vital. The potential toxicity of UVA-, UVB-, UVC-irradiated, andUVC/H2O2-treated aquatic NOM in two spot samples from two Australian reservoirs was analysed in two spot samples using Vibrio fischceri in the Microtox(TM) test, African green monkey kidney cells (AS/NZS 4020:1999), and Daphnia Carinata in an acute immobilisation test. Toxicity was not apparent forboth the Microtox(TM) procedure and cytotoxicity analyses for the UVC-irradiated and UVC/H2O2-treated NOM samples, while UVA- and UVB-irradiated water samples were non-toxic to D. carinata. In contrast, acute toxicity was observed for UVC- and UVC/H2O2-treated water samples. The observed toxicity was attributed to photooxidative degradation of NOM-metal binding sites, which resulted in the release of bioavailable copper ions, as evidenced by higher concentrations of free copper ions in photooxidised water. As the totalcopper concentrations of the two raw water samples were well below the Australian Water Quality Guidelines for metals in domestic supplies, the release of copper from photooxidised NOM is unlikely to cause health concerns inthese samples. (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 21/09/20 alle ore 06:17:10