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Particulate alumini...
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Cory, NeilSwedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för skoglig resurshushållning,Department of Forest Resource Management
(författare)
Particulate aluminium in boreal streams : Towards a better understanding of its sources and influence on dissolved aluminium speciation
- Artikel/kapitelEngelska2009
Förlag, utgivningsår, omfång ...
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Elsevier BV,2009
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printrdacarrier
Nummerbeteckningar
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LIBRIS-ID:oai:DiVA.org:su-59689
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https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-59689URI
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https://doi.org/10.1016/j.apgeochem.2009.04.038DOI
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https://res.slu.se/id/publ/61619URI
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Språk:engelska
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Sammanfattning på:engelska
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Ämneskategori:ref swepub-contenttype
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Ämneskategori:art swepub-publicationtype
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authorCount :7
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The adverse impacts of the inorganic labile monomeric Al (Al-i) fraction on aquatic organisms have meant that Al (Al-tot) determination and even speciation has become a routine part of environmental monitoring and assessment. However, if samples are not filtered prior to analysis then particulate Al (Al-tot(p)) could influence the determination of Al-tot, and therefore the determination of the more toxicologically important (Al-i), both when it is measured analytically or modelled from Al-tot. This paper shows that the Al/DOC ratio in unfiltered samples can identify the Al-tot(p) fraction, and thus improve the speciation of Al-i. These findings are based on data from a study in a 67 km(2) catchment in northern Sweden during the snowmelt-driven spring flood of two consecutive years. Filtered and unfiltered samples were studied to determine the spatial and temporal patterns in Al-tot(p). The concentrations of Al-tot(p) were greatest in larger downstream sites where significant silt deposits are located. The sites with no silt in their drainage area showed a mean difference between filtered (Al-tot(f)) and unfiltered (Al-tot(uf)) samples of 6%, while sites with silt deposits had a mean difference of 65%. The difference between filtered and unfiltered samples was greatest at peak flow. Spikes in Al-tot(p) did not behave consistently during fractionation with a cation exchange column, resulting in increases in either measured Al-i(f) or non-labile monomeric Al (Al-o(f)). Al-tot(p) spikes were associated with sharp increases in the Al:DOC ratio. The baseflow Al:DOC ratio could be used to model filtered Al-tot from DOC with a Spearman rho of 0.75.
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Buffam, IshiSwedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för skogsekologi,Department of Forest Ecology(Swepub:slu)51861
(författare)
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Laudon, HjalmarSwedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för skogens ekologi och skötsel,Department of Forest Ecology and Management(Swepub:slu)48717
(författare)
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SUBBjorkvald, Louise
(författare)
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Mörth, Carl-MagnusStockholms universitet,Institutionen för geologiska vetenskaper(Swepub:su)morth
(författare)
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Koehler, Stephan
(författare)
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Bishop, KevinSwedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för vatten och miljö,Department of Aquatic Sciences and Assessment(Swepub:slu)47741
(författare)
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Sveriges lantbruksuniversitetInstitutionen för skoglig resurshushållning
(creator_code:org_t)
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Sveriges lantbruksuniversitet
Sammanhörande titlar
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Ingår i:Applied Geochemistry: Elsevier BV24:9, s. 1677-16850883-29271872-9134
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