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Titolo:
Natural inactivation of phosphorus by aluminum in atmospherically acidified water bodies
Autore:
Kopacek, J; Ulrich, KU; Hejzlar, J; Borovec, J; Stuchlik, E;
Indirizzi:
Acad Sci Czech Republ, Inst Hydrobiol, Ceske Budejovice 37005, Czech Republic Acad Sci Czech Republ Ceske Budejovice Czech Republic 37005 ech Republic USB, Fac Biol Sci, Ceske Budejovice 37005, Czech Republic USB Ceske Budejovice Czech Republic 37005 dejovice 37005, Czech Republic TU Dresden, Okol Stn Neunzehnhain, D-09514 Lengefeld, Germany TU Dresden Lengefeld Germany D-09514 ehnhain, D-09514 Lengefeld, Germany Charles Univ, Dept Hydbiol, Prague 12044 2, Czech Republic Charles Univ Prague Czech Republic 12044 2 rague 12044 2, Czech Republic
Titolo Testata:
WATER RESEARCH
fascicolo: 16, volume: 35, anno: 2001,
pagine: 3783 - 3790
SICI:
0043-1354(200111)35:16<3783:NIOPBA>2.0.ZU;2-J
Fonte:
ISI
Lingua:
ENG
Soggetto:
PRECAMBRIAN SHIELD; LAKES; PHOSPHATE; SEDIMENTS; RESERVOIRS; SORPTION; PH;
Keywords:
Black Forest; Bohemian Forest; Ore Mountains; Tatra Mountains; lakes; reservoirs; acidification; pH gradients; aluminum; phosphorus;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
21
Recensione:
Indirizzi per estratti:
Indirizzo: Kopacek, J Acad Sci Czech Republ, Inst Hydrobiol, Na Sadkach 7, Ceske Budejovice 37005, Czech Republic Acad Sci Czech Republ Na Sadkach 7 Ceske Budejovice Czech Republic 37005
Citazione:
J. Kopacek et al., "Natural inactivation of phosphorus by aluminum in atmospherically acidified water bodies", WATER RES, 35(16), 2001, pp. 3783-3790

Abstract

Atmospheric acidification of catchment-lake ecosystems may provide naturalconditions for the in-lake control of P cycling. This process is based on the elevated transport of aluminum from acidified soils and its subsequent precipitation in the water body and is described for strongly acidified forest lakes, acidified and circumneutral reservoirs, and a moderately acidified alpine lake. In water bodies with episodically or permanently acidified inflows a pH gradient develops between lake water and tributaries due to: (i) neutralization of acidic inflows after mixing with waters with undepleted carbonate buffering system, and/or (ii) the in-lake alkalinity generationdominated by biochemical removal of NO3- and SO42- With the pH increasing towards neutrality, ionic Al species hydrolyze and form colloidal Al hydroxides (Al-part) with large specific surfaces and strong ability to bind orthophosphate from the liquid phase. Moreover, Al-part settles and increases the P sorption capacity of the sediment. The presence of Al-part on the bottom reduces orthophosphate release from sediments after its liberation from ferric oxyhydroxides during anoxia because Al-part is not sensitive to redox changes. Consequently, the natural in-lake P inactivation may be expectedin any water body with elevated Al input and a pH gradient between its inlet and outlet. (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 28/11/20 alle ore 09:41:06