Laura Sigg

Summary

Affiliation: Swiss Federal Institute of Aquatic Science and Technology
Country: Switzerland

Publications

  1. ncbi request reprint Arsenite and arsenate binding to dissolved humic acids: influence of pH, type of humic acid, and aluminum
    Johanna Buschmann
    Swiss Federal Institute ofAquatic Science and Technology, Eawag, Dubendorf, Switzerland
    Environ Sci Technol 40:6015-20. 2006
  2. pmc Characterization of extracellular polymeric substances (EPS) from periphyton using liquid chromatography-organic carbon detection-organic nitrogen detection (LC-OCD-OND)
    Theodora J Stewart
    Eawag, Swiss Federal Institute of Aquatic Science and Technology, 8600 Dubendorf, Switzerland
    Environ Sci Pollut Res Int 20:3214-23. 2013
  3. ncbi request reprint Comparison of analytical techniques for dynamic trace metal speciation in natural freshwaters
    Laura 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
  4. ncbi request reprint Speciation and bioavailability of trace metals in freshwater environments
    Laura Sigg
    Eawag, Swiss Federal Institute for Environmental Science and Technology, PO Box 611, CH 8600 Dubendorf, Switzerland
    Met Ions Biol Syst 44:47-73. 2005
  5. doi request reprint Cadmium speciation and accumulation in periphyton in a small stream with dynamic concentration variations
    Philippe Bradac
    Eawag, Swiss Federal Institute of Aquatic Science and Technology, P O Box 611, CH 8600 Duebendorf, Switzerland
    Environ Pollut 158:641-8. 2010
  6. ncbi request reprint Influence of metal speciation in natural freshwater on bioaccumulation of copper and zinc in periphyton: a microcosm study
    Sébastien Meylan
    Swiss Federal Institute of Environmental Science and Technology EAWAG, PO Box 611, CH 8600 Dubendorf, Switzerland
    Environ Sci Technol 38:3104-11. 2004
  7. ncbi request reprint Cadmium accumulation in Scenedesmus vacuolatus under freshwater conditions
    Stefanie 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
  8. doi request reprint Intracellular silver accumulation in Chlamydomonas reinhardtii upon exposure to carbonate coated silver nanoparticles and silver nitrate
    Flavio Piccapietra
    Eawag, Swiss Federal Institute of Aquatic Science and Technology, CH 8600 Duebendorf, Switzerland
    Environ Sci Technol 46:7390-7. 2012
  9. doi request reprint Kinetics of cadmium accumulation in periphyton under freshwater conditions
    Philippe 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
  10. ncbi request reprint Accumulation of copper and zinc in periphyton in response to dynamic variations of metal speciation in freshwater
    Sébastien 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

Collaborators

Detail Information

Publications33

  1. ncbi request reprint Arsenite and arsenate binding to dissolved humic acids: influence of pH, type of humic acid, and aluminum
    Johanna Buschmann
    Swiss Federal Institute ofAquatic Science and Technology, Eawag, Dubendorf, 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...
  2. pmc Characterization of extracellular polymeric substances (EPS) from periphyton using liquid chromatography-organic carbon detection-organic nitrogen detection (LC-OCD-OND)
    Theodora J Stewart
    Eawag, Swiss Federal Institute of Aquatic Science and Technology, 8600 Dubendorf, Switzerland
    Environ Sci Pollut Res Int 20:3214-23. 2013
    ..Differences in specific OC fractions of EPS extracts over the course of the study could be quantified using this method. This study suggests that LC-OCD-OND is a new valuable tool in EPS characterization of periphyton...
  3. ncbi request reprint Comparison of analytical techniques for dynamic trace metal speciation in natural freshwaters
    Laura 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...
  4. ncbi request reprint Speciation and bioavailability of trace metals in freshwater environments
    Laura Sigg
    Eawag, Swiss Federal Institute for Environmental Science and Technology, PO Box 611, CH 8600 Dubendorf, Switzerland
    Met Ions Biol Syst 44:47-73. 2005
  5. doi request reprint Cadmium speciation and accumulation in periphyton in a small stream with dynamic concentration variations
    Philippe 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...
  6. ncbi request reprint Influence of metal speciation in natural freshwater on bioaccumulation of copper and zinc in periphyton: a microcosm study
    Sébastien Meylan
    Swiss Federal Institute of Environmental Science and Technology EAWAG, PO Box 611, CH 8600 Dubendorf, Switzerland
    Environ Sci Technol 38:3104-11. 2004
    ....
  7. ncbi request reprint Cadmium accumulation in Scenedesmus vacuolatus under freshwater conditions
    Stefanie 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...
  8. doi request reprint Intracellular silver accumulation in Chlamydomonas reinhardtii upon exposure to carbonate coated silver nanoparticles and silver nitrate
    Flavio 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...
  9. doi request reprint Kinetics of cadmium accumulation in periphyton under freshwater conditions
    Philippe 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...
  10. ncbi request reprint Accumulation of copper and zinc in periphyton in response to dynamic variations of metal speciation in freshwater
    Sébastien 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...
  11. doi request reprint Characterization of lead induced metal-phytochelatin complexes in Chlamydomonas reinhardtii
    Christian 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...
  12. ncbi request reprint Competition among zinc, manganese, and cadmium uptake in the freshwater alga Scenedesmus vacuolatus
    Stefanie 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...
  13. ncbi request reprint Thiol and metal contents in periphyton exposed to elevated copper and zinc concentrations: a field and microcosm study
    Séverine 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...
  14. ncbi request reprint Accumulation of cadmium in periphyton under various freshwater speciation conditions
    Philippe 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...
  15. doi request reprint Colloidal stability of carbonate-coated silver nanoparticles in synthetic and natural freshwater
    Flavio 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...
  16. ncbi request reprint Photoinduced oxidation of antimony(III) in the presence of humic acid
    Johanna 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...
  17. ncbi request reprint Thiols in Scenedesmus vacuolatus upon exposure to metals and metalloids
    Séverine 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...
  18. pmc Linking toxicity and adaptive responses across the transcriptome, proteome, and phenotype of Chlamydomonas reinhardtii exposed to silver
    Smitha Pillai
    Department of Environmental Toxicology, Eawag, Swiss Federal Institute of Aquatic Science and Technology, 8600 Duebendorf, Switzerland
    Proc Natl Acad Sci U S A 111:3490-5. 2014
    ..From the analysis of the perturbations of the cell's functions, we derived a detailed mechanistic understanding of temporal dynamics of toxicity and adaptive response pathways for C. reinhardtii exposed to silver. ..
  19. pmc Bioavailability of silver nanoparticles and ions: from a chemical and biochemical perspective
    Renata Behra
    Eawag, Swiss Federal Institute of Aquatic Science and Technology, Environmental Toxicology, PO Box 611, 8600 Dubendorf, Switzerland
    J R Soc Interface 10:20130396. 2013
    ....
  20. doi request reprint 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...
  21. doi request reprint Environmental behavior and ecotoxicity of engineered nanoparticles to algae, plants, and fungi
    Enrique 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...
  22. ncbi request reprint Photoirradiation of dissolved humic acid induces arsenic(III) oxidation
    Johanna 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...
  23. ncbi request reprint Dissolution of metal and metal oxide nanoparticles in aqueous media
    Niksa Odzak
    Eawag, Swiss Federal Institute of Aquatic Science and Technology, Department Environmental Toxicology Utox, Ueberlandstrasse 133, 8600 Dubendorf, Switzerland Electronic address
    Environ Pollut 191:132-8. 2014
    ..The results indicate that there is a need to apply complementary techniques to precisely determine dissolution of nanoparticles in aqueous media. ..
  24. ncbi request reprint Phytochelatin induction, cadmium accumulation, and algal sensitivity to free cadmium ion in Scenedesmus vacuolatus
    Séverine 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...
  25. ncbi request reprint Tolerance of Oocystis nephrocytioides to copper: intracellular distribution and extracellular complexation of copper
    Diana 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...
  26. ncbi request reprint Antimony(III) binding to humic substances: influence of pH and type of humic acid
    Johanna 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...
  27. ncbi request reprint Speciation of Cu and Zn in drainage water from agricultural soils
    Annette 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...
  28. ncbi request reprint Toxicity of silver nanoparticles to Chlamydomonas reinhardtii
    Enrique 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...
  29. pmc Characterization of lead-phytochelatin complexes by nano-electrospray ionization mass spectrometry
    Christian 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...
  30. ncbi request reprint Influence of agglomeration of cerium oxide nanoparticles and speciation of cerium(III) on short term effects to the green algae Chlamydomonas reinhardtii
    Lena A Röhder
    Eawag, Swiss Federal Institute of Aquatic Science and Technology, Department of Environmental Toxicology, Dubendorf 8600, Switzerland ETH Zürich, Institute of Biogeochemistry and Pollutant Dynamics, Zurich 8092, Switzerland
    Aquat Toxicol 152:121-30. 2014
    ..For both algae strains, a flocculation of cells was observed upon exposure to agglomerated CeO2 NP and Ce(NO3)3, only algae exposed to agglomerated CeO2 NP were tightly packed in exopolymeric substances. ..
  31. ncbi request reprint Dynamic speciation analysis and bioavailability of metals in aquatic systems
    Herman 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...
  32. ncbi request reprint Model predictions of metal speciation in freshwaters compared to measurements by in situ techniques
    Emily 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...
  33. ncbi request reprint Adsorption of Cu, Cd, and Ni on goethite in the presence of natural groundwater ligands
    Diane 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...