WFRF:(Borg M.)
Search: WFRF:(Borg M.) > (2010-2014) > Toxicity of Inorgan...
- 36 of 73
- Previous record
- Next record
- To hitlist
Toxicity of Inorganic Aluminium in Humic Streams
-
- Andrén, Cecilia M., 1964- (author)
- Stockholms universitet,Institutionen för tillämpad miljövetenskap (ITM)
-
- Rydin, Emil, Associate Professor (thesis advisor)
- Uppsala universitet, EBC, Department of Limnology
-
- Borg, Hans, Professor (thesis advisor)
- Stockholms universitet,Institutionen för tillämpad miljövetenskap (ITM)
- show more...
- show less...
- (creator_code:org_t)
- ISBN 9789174475777
- Stockholm : Department of Applied Environmental Science (ITM), Stockholm University, 2012
- English 42 s.
- Doctoral thesis (other academic/artistic)
Abstract
Subject headings
Close
- Aluminium (Al) has been recognised as a main toxic factor alongside pH in acidified water ecosystems. The toxic effect of Al has been attributed to inorganic Al (Ali), though there are few in situ studies in ambient humic waters which are the focus of this thesis.The aim was to estimate Ali toxicity and thus also Ali concentrations in Swedish humic streams. Subsequently it is necessary to analyse Ali correctly, which was studied by modelling and method intercalibrations. The hypothesis was that the effect of Ali could be followed via physiological effects and Al accumulation, as well as by mortality. Toxicity was studied by in stream exposures of brown trout (Salmo trutta L.) and two salmonid prey organisms (Gammarus pulex and Baetis rhodani) during spring flood.The modelling of the Ali fraction was performed using monitoring data covering all of Sweden with satisfactory results. The essential variables for Ali modelling were determined; Al, DOC, pH and F, while Fe, Ca and Mg had less effect. The automated analytical procedure for Ali (with cation exchange followed by complexation with pyrocatechol violet) was modified and validated and showed to be the preferred method for laboratory analyses.To avoid detrimental effects for brown trout Ali should be <20 µg/L and pH >5.0; mortality was high when the Ali was above 50 µg/L. The invertebrates were more sensitive, as mortalities occurred at pH <6.0 and Ali >15 µg/L for G. pulex, and at pH <5.7 and Ali >20 µg/L for B. rhodani. It is prudent to use a wide view and let the most sensitive species set the tolerance limits; a pH above 5.7-6.0 and Ali below 15-20 µg/L allows the stream ecosystems to thrive.Today, as waters are recovering from acidification, the aim of mitigating liming is to carefully adjust dosage to avoid suboptimal water quality. The thresholds found in this thesis can be used to efficiently but carefully decrease liming, as both Ali and pH levels have to be balanced to sustain the recovering aquatic biota.
Subject headings
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Miljövetenskap (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Environmental Sciences (hsv//eng)
Keyword
- Inorganic Al
- toxicity
- acidification
- humic streams
- Applied Environmental Science
- tillämpad miljövetenskap
Publication and Content Type
- vet (subject category)
- dok (subject category)
Find in a library
- Toxicity of Inorganic Aluminium in Humic Streams (Search the publication in LIBRIS)
To the university's database
- 36 of 73
- Previous record
- Next record
- To hitlist
Find more in SwePub
- By the author/editor
- Andrén, Cecilia ...
- Rydin, Emil, Ass ...
- Borg, Hans, Prof ...
- Eriksson Wiklund ...
- Rosseland, Björn ...
- About the subject
-
- NATURAL SCIENCES
- NATURAL SCIENCES
- and Earth and Relate ...
- and Environmental Sc ...
- By the university
- Stockholm University
Search outside SwePub
- Extend your search to:
- Google Book Search
- Google Scholar
Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.
- Copyright © LIBRIS - National Library Systems
- LIBRIS.kb.se
