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Geochemical distribution and mobility of heavy metals in sediments of urban streams affected by combined sewer overflows

SYSNO ASEP	0360299
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Geochemical distribution and mobility of heavy metals in sediments of urban streams affected by combined sewer overflows
Author(s)	Hnaťuková, Petra (UH-J)_{RID, SAI, ORCID}
Source Title	Journal of Hydrology and Hydromechanics. - : Ústav pro hydromechaniku AV ČR, v. v. i.. - : Ústav hydrológie SAV - ISSN 0042-790X Roč. 59, č. 2 (2011), s. 85-94
Number of pages	10 s.
Language	eng - English
Country	SK - Slovakia
Keywords	sediments ; heavy metals ; urban streams ; sequential extraction ; combined sewer overflows
Subject RIV	BK - Fluid Dynamics
R&D Projects	IAA200600902 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR)
CEZ	AV0Z20600510 - UH-J (2005-2011)
UT WOS	000294700300002
DOI	10.2478/v10098-011-0007-7
Annotation	Study was undertaken to assess the impact of combined sewer overflows (CSOs) on distribution and mobility of heavy metals in sediments of streams in Prague, Czech Republic. Contents of total and extractable heavy metals (Cu, Zn, Pb, Cd, Cr and Ni), mineralogical phases and other sediment properties were measured in 44 surficial sediment samples. The observed mobility order of metals was Cd > Zn > Ni > Cu > Pb > Cr. There was a considerable increase in Zn mobility and increase of Cu associated with the oxidisable fraction in the sediments below CSO discharges. Cd was revealed as the most mobile heavy metal with percentages of extraction of approximately 40–60% in acid soluble fraction. Pb was mainly found in reducible fraction associated with Fe/Mn (oxi)hydroxides. In terms of environmental significance, Cd and Zn can be particularly mobile and bioavailable under acidic conditions, because they are predominantly bound in labile fractions.
Workplace	Institute of Hydrodynamics
Contact	Soňa Hnilicová, hnilicova@ih.cas.cz, Tel.: 233 109 003
Year of Publishing	2012

Number of the records: 1