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Titolo:
Test of the first-order removal model for metal retention in a young constructed wetland
Autore:
Goulet, RR; Pick, FR; Droste, RL;
Indirizzi:
Univ Ottawa, Dept Biol, Ottawa, ON K1N 6N5, Canada Univ Ottawa Ottawa ON Canada K1N 6N5 ept Biol, Ottawa, ON K1N 6N5, Canada Univ Ottawa, Dept Civil Engn, Ottawa, ON K1N 6N5, Canada Univ Ottawa Ottawa ON Canada K1N 6N5 vil Engn, Ottawa, ON K1N 6N5, Canada
Titolo Testata:
ECOLOGICAL ENGINEERING
fascicolo: 4, volume: 17, anno: 2001,
pagine: 357 - 371
SICI:
0925-8574(200108)17:4<357:TOTFRM>2.0.ZU;2-1
Fonte:
ISI
Lingua:
ENG
Soggetto:
COAL-MINE DRAINAGE; WATER-QUALITY; FLOW-RATE; MANGANESE; IRON; PHOSPHORUS; ECOSYSTEMS; REDUCTION; MERCURY; FE;
Keywords:
hydraulic retention time; biological activity; first-order removal model; metals; constructed wetlands; removal efficiency;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
44
Recensione:
Indirizzi per estratti:
Indirizzo: Goulet, RR Univ Ottawa, Dept Biol, 30 Marie Curie, Ottawa, ON K1N 6N5, Canada Univ Ottawa 30 Marie Curie Ottawa ON Canada K1N 6N5 6N5, Canada
Citazione:
R.R. Goulet et al., "Test of the first-order removal model for metal retention in a young constructed wetland", ECOL ENG, 17(4), 2001, pp. 357-371

Abstract

The first-order removal model is widely used in constructed wetland design. The suitability of this model was tested to predict metal retention in a young constructed wetland receiving agricultural and urban runoff. During two years, water samples for total and dissolved metal analyses were collected every third day at both the inlet and the outlet. The wetland retained metals best during summer and fall whereas during winter the retention of metals was significantly lower. The first-order removal model predicted Fe and Mn retention in the spring and dissolved Zn retention from spring to fallin both years. During those periods, hydraulic retention times: (HRTs) greater than 7 days provided maximum retention for Fe, Mn, and dissolved Zn. However, first-order removal models failed to fit summer, fall and winter data fur almost every metal under investigation (Fe, Mn, dissolved Cu, dissolved As) suggesting that HRTs (< 1-25 days) did not affect metal retention during these seasons. The metal loading to the wetland was low and the inputof metals through internal loading may be more significant consequently decreasing the metal retention. Therefore, the first-order removal model is inadequate to predict metal retention on a seasonal basis. Models used to design constructed wetlands under cold climates must consider seasonal changes that affect biological as well as hydrological variables. (C) 2001 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 05/04/20 alle ore 22:40:00