Research Topics
| Laura SiggSummaryAffiliation: Swiss Federal Institute of Aquatic Science and Technology Country: Switzerland Publications
| Collaborators
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Detail Information
Publications
Arsenite and arsenate binding to dissolved humic acids: influence of pH, type of humic acid, and aluminumJohanna Buschmann
Swiss Federal Institute ofAquatic Science and Technology, Eawag, , Switzerland
Environ Sci Technol 40:6015-20. 2006..Under environmentally relevant conditions, about 10% of total As(V) may be bound to DOM, whereas >10% of As(III) is bound to DOM at very low As/DOC ratios only. Binding of arsenic to DOM should be considered in natural systems...- Speciation and bioavailability of trace metals in freshwater environmentsLaura Sigg
Eawag, Swiss Federal Institute for Environmental Science and Technology, PO Box 611, , Switzerland
Met Ions Biol Syst 44:47-73. 2005 - Comparison of analytical techniques for dynamic trace metal speciation in natural freshwatersLaura Sigg
Eawag, Swiss Federal Institute for Aquatic Science and Technology, P O Box 611, CH 8600 Duebendorf, Switzerland
Environ Sci Technol 40:1934-41. 2006..Techniques involving in situ measurements (GIME-VIP) or in situ exposure (DGT, DMT, and HFPLM) appear to be appropriate in avoiding artifacts which may occur during sampling and sample handling... 
Intracellular silver accumulation in Chlamydomonas reinhardtii upon exposure to carbonate coated silver nanoparticles and silver nitrateFlavio Piccapietra
Eawag, Swiss Federal Institute of Aquatic Science and Technology, CH 8600 Duebendorf, Switzerland
Environ Sci Technol 46:7390-7. 2012..The bioavailability of AgNP was calculated to be low in both strains relative to Ag(+), suggesting that AgNP internalization across the cell membrane was limited...- Kinetics of cadmium accumulation in periphyton under freshwater conditionsPhilippe Bradac
Eawag, Swiss Federal Institute of Aquatic Science and Technology, P O Box 611, CH 8600, Dubendorf, Switzerland
Environ Toxicol Chem 28:2108-16. 2009..The release of Cd from periphyton after the end of Cd exposure was slow when compared to the initial uptake rates... - Cadmium speciation and accumulation in periphyton in a small stream with dynamic concentration variationsPhilippe Bradac
Eawag, Swiss Federal Institute of Aquatic Science and Technology, P O Box 611, CH 8600 Duebendorf, Switzerland
Environ Pollut 158:641-8. 2010..Concentrations of Zn, Mn, Cu, Pb and Fe in periphyton also followed the dynamic variations of metal concentrations in water. Repeated exposure of periphyton to elevated dissolved Cd may lead to Cd accumulation... - Influence of metal speciation in natural freshwater on bioaccumulation of copper and zinc in periphyton: a microcosm studySébastien Meylan
Swiss Federal Institute of Environmental Science and Technology EAWAG, PO Box 611, CH 8600 Dubendorf, Switzerland
Environ Sci Technol 38:3104-11. 2004.... - Characterization of lead induced metal-phytochelatin complexes in Chlamydomonas reinhardtiiChristian Scheidegger
Eawag, Swiss Federal Institute of Aquatic Science and Technology, Dubendorf, Switzerland
Environ Toxicol Chem 30:2546-52. 2011..The results of the present study indicate that the role of PCs in Pb detoxification is minor, because only 13% of total Pb was associated with PCs... - Cadmium accumulation in Scenedesmus vacuolatus under freshwater conditionsStefanie Töpperwien
Eawag, Swiss Federal Institute of Aquatic Science and Technology, P O Box 611, CH 8600 Dubendorf, Switzerland
Environ Sci Technol 41:5383-8. 2007..Modeling of the Cd uptake revealed that besides cation and proton competition, other factors such as dissolved organic carbon composition and the presence of colloids might reduce Cd accumulation in softwater systems... - Competition among zinc, manganese, and cadmium uptake in the freshwater alga Scenedesmus vacuolatusStefanie Töpperwien
Eawag, Swiss Federal Institute of Aquatic Science and Technology, CH 8600 Dubendorf, Switzerland
Environ Toxicol Chem 26:483-90. 2007..The environmental implications of these results are discussed with respect to potential Cd toxicity for aquatic organisms... - Thiol and metal contents in periphyton exposed to elevated copper and zinc concentrations: a field and microcosm studySéverine Le Faucheur
Swiss Federal Institute of Aquatic Science and Technology EAWAG, CH 8600 Duebendorf, Switzerland
Environ Sci Technol 39:8099-107. 2005..This study is the first one to report changes in thiol content in periphyton in response to an increase of the metal concentration in natural freshwaters... - Accumulation of cadmium in periphyton under various freshwater speciation conditionsPhilippe Bradac
Eawag, Swiss Federal Institute of Aquatic Science and Technology, P O Box 611, CH 8600 Duebendorf, Switzerland
Environ Sci Technol 43:7291-6. 2009..These findings confirm the importance of labile species for Cd accumulation in periphyton under freshwater conditions, as predicted by models considering diffusion and uptake kinetics... - Colloidal stability of carbonate-coated silver nanoparticles in synthetic and natural freshwaterFlavio Piccapietra
Eawag, Swiss Federal Institute of Aquatic Science and Technology, CH 8600 Dubendorf, Switzerland
Environ Sci Technol 46:818-25. 2012..Consequently, slow sedimentation and high mobility of agglomerated AgNP could be expected under the considered natural conditions. A critical evaluation of the different methods used is presented as well... - Photoinduced oxidation of antimony(III) in the presence of humic acidJohanna Buschmann
Swiss Federal Institute of Environmental Science and Technology EAWAG, P O Box 611, CH 8600 Dibendorf, Switzerland
Environ Sci Technol 39:5335-41. 2005..Photoirradiation of natural water samples spiked with Sb(III) showed that the oxidation rates could be well predicted based on DOC... - Thiols in Scenedesmus vacuolatus upon exposure to metals and metalloidsSéverine Le Faucheur
Eawag, Swiss Federal Institute of Aquatic Science and Technology, P O Box 611, CH 8600 Duebendorf, Switzerland
Aquat Toxicol 80:355-61. 2006..Glutathione and phytochelatin content in S. vacuolatus do thus sensitively respond to exposure to a number of metals and metalloids... - Phytochelatin formation kinetics and toxic effects in the freshwater alga Chlamydomonas reinhardtii upon short- and long-term exposure to lead(II)Christian Scheidegger
Eawag, Swiss Federal Institute of Aquatic Science and Technology, Ueberlandstrasse 133, 8600 Duebendorf, Switzerland
Aquat Toxicol 101:423-9. 2011..Inhibition of photosynthesis and growth up to 100% was observed upon long-term exposure, whereas in short-term experiments no inhibitory effects were detected... - Photoirradiation of dissolved humic acid induces arsenic(III) oxidationJohanna Buschmann
Swiss Federal Institute of Aquatic Science and Technology EAWAG, Dubendorf, Switzerland
Environ Sci Technol 39:9541-6. 2005..Fe(III) (as polynuclear Fe(III)-(hydr)oxo complexes or Fe(III)-DOC complexes) accelerates the rate of photoinduced As(III) oxidation in the presence of DOC by a factor of 1.5-2... - Environmental behavior and ecotoxicity of engineered nanoparticles to algae, plants, and fungiEnrique Navarro
Swiss Federal Institute of Aquatic Science and Technology EAWAG, Ueberlandstrasse 133, Dubendorf 8600, Switzerland
Ecotoxicology 17:372-86. 2008..Many questions regarding the bioavailability of ENPs, their uptake by algae, plants, and fungi and the toxicity mechanisms remain to be elucidated... - Accumulation of copper and zinc in periphyton in response to dynamic variations of metal speciation in freshwaterSébastien Meylan
Swiss Federal Institute of Environmental Science and Technology EAWAG, P O Box 611, CH 8600 Dubendorf, Switzerland
Environ Sci Technol 37:5204-12. 2003..Different concentrations of dissolved manganese during the two time periods may affect the accumulation of zinc and copper by competition for metal uptake... 
Characterization of lead-phytochelatin complexes by nano-electrospray ionization mass spectrometryChristian Scheidegger
Department of Environmental Toxicology, Eawag, Swiss Federal Institute of Aquatic Science and Technology Dübendorf, Switzerland
Front Microbiol 3:41. 2012..These findings corroborate the postulated Pb-PC complexes from a previous study using size exclusion chromatography of PC extracted from algae, as well as the concurrent formation of Pb-, Zn-, and Cu-PC complexes in algae...- Phytochelatin induction, cadmium accumulation, and algal sensitivity to free cadmium ion in Scenedesmus vacuolatusSéverine Le Faucheur
Swiss Federal Institute for Environmental Science and Technology, Ueberlandstrasse 133, CH 8600 Duebendorf, Switzerland
Environ Toxicol Chem 24:1731-7. 2005..The ratio of the concentration of total thiol groups to intracellular cadmium was important for maintaining optimal growth. In contrast, thiol groups from phytochelatins were never measured in excess to intracellular cadmium content... - Antimony(III) binding to humic substances: influence of pH and type of humic acidJohanna Buschmann
Eawag, Swiss Federal Institute for Environmental Science and Technology, P O Box 611, CH 8600 Dubendorf, Switzerland
Environ Sci Technol 38:4535-41. 2004..Under environmentally relevant conditions, over 30% of total Sb(III) may be bound to natural organic matter... - Toxicity of silver nanoparticles to Chlamydomonas reinhardtiiEnrique Navarro
Eawag, Swiss Federal Institute of Aquatic Science and Technology, Dubendorf, Switzerland
Environ Sci Technol 42:8959-64. 2008..Together, the results indicate that the interaction of these particles with algae influences the toxicity of AgNP, which is mediated by Ag+. Particles contributed to the toxicity as a source of Ag+ which is formed in presence of algae... - Dynamic speciation analysis and bioavailability of metals in aquatic systemsHerman P Van Leeuwen
Laboratory of Physical Chemistry and Colloid Science, Wageningen University, Dreijenplein 6, 6703 HB Wageningen, The Netherlands
Environ Sci Technol 39:8545-56. 2005..Case studies illustrate the practical significance of knowledge on the dynamic features of metal complex species in relation to biouptake, and highlight the limitations of equilibrium-based models... - Speciation of Cu and Zn in drainage water from agricultural soilsAnnette P Aldrich
Swiss Federal Institute for Environmental Science and Technology (EAWAG, P.O. Box 611, CH-8600 Duebendorf, Switzerland
Environ Sci Technol 36:4824-30. 2002..2-8.6). Therefore very little free metal species were found suggesting a low bioavailability of these metals in the drainage water even at elevated metal concentrations... - Model predictions of metal speciation in freshwaters compared to measurements by in situ techniquesEmily R Unsworth
Department of Environmental Science, University of Lancaster, Lancaster LA1 4YQ, United Kingdom
Environ Sci Technol 40:1942-9. 2006..Model predictions of free ion activities generally did not agree with measurements, highlighting the need for further work and difficulties in obtaining appropriate input data... - Adsorption of Cu, Cd, and Ni on goethite in the presence of natural groundwater ligandsDiane Buerge-Weirich
Swiss Federal Institute for Environmental Science and Technology (EAWAG, Duebendorf
Environ Sci Technol 36:328-36. 2002..Competition reactions between Cu and Ni for complexation with the same strong ligand L(I) were observed... - Tolerance of Oocystis nephrocytioides to copper: intracellular distribution and extracellular complexation of copperDiana Soldo
Swiss Federal Institute for Environmental Science and Technology (EAWAG, Ueberlandstrasse 133, CH-8600 Duebendorf, Switzerland
Aquat Toxicol 71:307-17. 2005..We propose that accumulation and sequestration of Cu in thylakoids and, to a lesser extent, adsorption of copper to the algal cell surface represent the most important tolerance mechanism, for O. nephrocytioides...