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Amorphous Aluminum Hydroxide Control on Sulfate and Phosphate in Sediment-Solution Systems
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SYSNO ASEP 0326225 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Amorphous Aluminum Hydroxide Control on Sulfate and Phosphate in Sediment-Solution Systems Překlad názvu Amorfní hydroxid hliníku reguluje sulfáty a fosfáty v systému sediment-roztok Tvůrce(i) Navrátil, T. (CZ)
Rohovec, Jan (GLU-S) RID, SAI
Amirbahman, A. (US)
Norton, S. A. (US)
Fernandez, I. J. (US)Zdroj.dok. Water, Air, and Soil Pollution. - : Springer - ISSN 0049-6979
Roč. 201, 1-4 (2009), s. 87-98Poč.str. 12 s. Forma vydání www - www Jazyk dok. eng - angličtina Země vyd. NL - Nizozemsko Klíč. slova adsorption ; oligotrophy ; Al precipitates ; anions ; acidification ; alkalization Vědní obor RIV DD - Geochemie CEZ AV0Z30130516 - GLU-S (2005-2011) UT WOS 000266928600009 EID SCOPUS 67449149070 DOI 10.1007/s11270-008-9929-z Anotace We experimentally determined the adsorption characteristics of natural, freshly precipitated Al(OH)3 for SO4 and PO4. The fresh Al precipitate occurred in stream sediment of Jachymov Stream (Czech Republic). The Al-rich sediment strongly adsorbed added PO4 prior to acidification experiment; this sorbed PO4 was released only after substantial dissolution of the sediment, at pH 3.67. Sorption of P by Al(OH)3 appears to be an important control on dissolved PO4 concentration in surface waters, unless there is a large excess of PO4. Acidification of the sediment-solution system caused protonation of the sediment surface, thereby increasing the adsorption capacity for SO4. Maximum SO4 adsorption occurred at pH 4.2, below which dissolution of the sediment offset the increasing anion adsorption capacity, and formation of AISO4 + inhibited the increasing SO4 adsorption capacity. This research demonstrates that there are important pH thresholds for anion adsorption in freshwaters Pracoviště Geologický ústav Kontakt Jana Popelková, popelkova@gli.cas.cz, Sabina Janíčková, Tel.: 233 087 272 Rok sběru 2013
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