Julian Alberto Gallego Urrea
POSTDOCTORAL RESEARCH FELLOW
Department of MarineAbout Julian Alberto Gallego Urrea
Contact details
Department of marine sciences
Telephone: +46 (0)76 55 06 372 E-mail: julian.gallego@marine.gu.se Address: Kristineberg 566, 451 78 Fiskebäckskil, Sweden
https://orcid.org/0000-0001-8527-8084
Research
My main research within marine sciences and the research group on marine environmental nanochemistry is in inorganic environmental aquatic chemistry with emphasis in analytical chemistry, colloidal chemistry and chemical modelling. I am particularly interested in approaches that help connecting aqueous phase environmental chemical modelling with chemical-particle dynamic analysis, with help of novel analytical techniques.
FRAM - centre for future chemical risk assessment and management strategies In the context of FRAM, I am providing support in the analysis of inorganic components in water and sediments, their speciation, their responses to environmental stressors and their interaction with other contaminants. I collaborate with the field studies planning and analysis providing insight on the possible interactions between different abiotic factors on the fate, transport and bioavailability of inorganic substances, either dissolved or in the particulate form.
MISTRA environmental nanosafety In Mistra environmental nanosafety program, I collaborate with the detection and fate work packages, using techniques such as scanning electron microscopy, SEM, with energy-dispersive X-ray spectroscopy, EDX, in order to identify elemental composition of inorganic particles.
Earlier research
In Nanofase project, our group developed experimental approaches for the detection of engineered nanoparticles in estuarine and seawater. We also collaborated in determining transformation rate constants (e.g. heteroaggregation) of nanoparticles relevant for mathematical modelling in a large scale basin modelling.
Chemical speciation The chemical speciation of trace metals in seawater is influenced by the presence of organic substances. Different types of exudates generated by organisms or derived from decomposition of organic matter, together with the organisms' biological interfaces (membranes) determines the bioavailability of metals to aquatic organisms. Variability in chemical speciation can thus have important ecological consequences.
As part of my postdoc, mesocosm and laboratory experiments were used to generate data on the organic complexation of selected trace metals in seawater, and on the oxidation rate of Fe(II), under changing pH and temperatures. These results were analysed using an in-house chemical speciation model later incorporated in large-scale modelling in the EU project Ocean Certain.
In parallel, the joint university project SHIpH was aimed to evaluate present and potential future acidification of the Baltic Sea as a result of sulphur and nitrogen oxide (SOX and NOX) emissions from commercial shipping under different regulatory regimes. This was assessed with help of a Baltic Sea biogeochemical model (Baltic-probe) in conjunction with other partners in the project.
The focus of my doctoral studies was in the recently developed field of study dealing with environmental risk assessment of manufactured nanoparticles, with emphasis on environmental chemistry and ecotoxicology. My aim in this field was the investigation and analysis of ecotoxicity and behaviour of silver and titanium dioxide nanoparticles in natural aquatic environments. The research also included investigations of the fate and behaviour of manufactured nanomaterials on the environment, and collaborations on the development of analytical tools to analyse such manufactured nanoparticles at ambient ultra-low concentrations in the complex matrices of real aquatic environments.
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Nanomaterial Fate in Seawater: A Rapid Sink or Intermittent
Stabilization?
Andreas P. Gondikas, Julian A. Gallego-Urrea, Maurits Halbach, Nicolas Derrien, Martin Hassellöv
Frontiers in Environmental Science - 2020-01-01 -
Fe(II) stability in coastal seawater during experiments in Patagonia, Svalbard, and Gran
Canaria
Mark J. Hopwood, Carolina Santana-González, Julian A. Gallego-Urrea, Nicolas Sanchez, Eric P. Achterberg, Murat V. Ardelan, Martha Gledhill, Melchor González-Dávila, Linn Hoffmann, Øystein Leiknes, Juana Magdalena Santana-Casiano, Tatiana M. Tsagaraki, David R. Turner
Biogeosciences - 2020-01-01 -
Experiment design and bacterial abundance control extracellular H2O2 concentrations during four series of mesocosm
experiments
Mark J. Hopwood, Nicolas Sanchez, Despo Polyviou, Øystein Leiknes, Julian A. Gallego-Urrea, Eric P. Achterberg, Murat V. Ardelan, Javier Aristegui, Lennart Bach, Sengul Besiktepe, Yohann Heriot, Ioanna Kalantzi, Tuba Terblylk Kurt, Ioulia Santi, Tatiana M. Tsagaraki, David R. Turner
Biogeosciences - 2020-01-01 -
Strategies for determining heteroaggregation attachment efficiencies of engineered nanoparticles in aquatic
environments
A. Praetorius, E. Badetti, A. Brunelli, A. Clavier, Julian A. Gallego-Urrea, Andreas P. Gondikas, Martin Hassellöv, T. Hofmann, A. Mackevica, A. Marcomini, W. Peijnenburg, J. T. K. Quik, M. Seijo, S. Stoll, N. Tepe, H. Walch, F. von der Kammer
Environmental Science-Nano - 2020-01-01 -
Transformation and behaviour of NMs in freshwater and coastal seawater in support of modelling. H2020 NanoFASE Project Deliverable D8.3-4. March
2019.
Julian A. Gallego-Urrea, Antonia Praetorius, Aiga Mackevica, Helen Walch, Frank von der Kammer, Andreas P. Gondikas, Frantisek Zelenak, Martin Hassellöv, Serge Stoll, Marianne Seijo, Antonio Marcomini, Elena Badetti, Alessandro Bonetto, Ralf Kaegi, Alexander Gogos, Willie Peijnenburg, Fazel Abdolahpur Monikh, Iseult Lynch, Samuel Harrison, Richard J. Williams
- 2019-01-01 -
Report on simulation of hetero and homo aggregation processes using computer modelling. H2020 NanoFASE Project Deliverable D8.5. September
2019.
Marianne Seijo, Arnaud Clavier, Fabrice Carnal, Serge Stoll, Antonia Praetorius, Julian A. Gallego-Urrea, Frank von der Kammer, Willie Peijnenburg, Elena Badetti, Martin Hassellöv
- 2019-01-01 -
Characterizing the behavior, uptake, and toxicity of NM300K silver nanoparticles in Caenorhabditis
elegans
Merethe Kleiven, Lisa M. Rossbach, Julian A. Gallego-Urrea, Dag A. Brede, Deborah H. Oughton, Claire Coutris
Environmental Toxicology and Chemistry - 2018-01-01 -
Effects of the adsorption of NOM model molecules on the aggregation of TiO2 nanoparticles in aqueous
suspensions
Karin Danielsson, P. Persson, Julian A. Gallego-Urrea, Zareen Abbas, Jörgen Rosenqvist, Caroline Jonsson
NanoImpact - 2018-01-01 -
The potential future contribution of shipping to acidification of the Baltic
Sea
David R. Turner, Moa Edman, Julian A. Gallego-Urrea, Björn Claremar, Ida-Maja Hassellöv, Anders Omstedt, Anna Rutgersson
Ambio - 2018-01-01 -
Influence of organic molecules on the aggregation of TiO2 nanoparticles in acidic
conditions
Karin Danielsson, Julian A. Gallego-Urrea, Martin Hassellöv, Stefan Gustafsson, Caroline Jonsson
Journal of nanoparticle research - 2017-01-01 -
Determination of pH in estuarine and brackish waters: Pitzer parameters for Tris buffers and dissociation constants for m-cresol purple at
298.15K
Julian A. Gallego-Urrea, David R. Turner
Marine Chemistry - 2017-01-01 -
Ecotoxicity testing and environmental risk assessment of iron nanomaterials for sub-surface remediation – Recommendations from the FP7 project
NanoRem
Rune Hjorth, Claire Coutris, Nhung H.A. Nguyen, Alena Sevcu, Julian A. Gallego-Urrea, Anders Baun, Erik J. Joner
Chemosphere - 2017-01-01 -
Effects of silver nanoparticles to the freshwater snail Physa acuta: The role of test media and snails' life cycle
stage
Sandra F. Gonçalves, Maria D. Pavlaki, Rafael Lopes, Julia Hammes, Julian A. Gallego-Urrea, Martin Hassellöv, Kerstin Jurkschat, Alison Crossley, Susana Loureiro
Environmental Toxicology and Chemistry - 2017-01-01 -
Coagulation and sedimentation of gold nanoparticles and illite in model natural waters: Influence of initial particle
concentration
Julian A. Gallego-Urrea, Julia Hammes, Geert Cornelis, Martin Hassellöv
NanoImpact - 2016-01-01 -
Uptake and elimination kinetics of silver nanoparticles and silver nitrate by Raphidocelis subcapitata: The influence of silver behaviour in
solution
F. Ribeiro, Julian A. Gallego-Urrea, R. M. Goodhead, C. A. M. Van Gestel, J. Moger, Amvm Soares, S. Loureiro
Nanotoxicology - 2015-01-01 -
Intermethod comparison of the particle size distributions of colloidal silica
nanoparticles
Jani Tuoriniemi, Ann-Catrin J. H. Johnsson, Jenny Perez-Holmberg, Stefan Gustafsson, Julian A. Gallego-Urrea, Eva Olsson, Jan B. C. Pettersson, Martin Hassellöv
Science and Technology of Advanced Materials - 2014-01-01 -
Influence of different types of natural organic matter on titania nanoparticle stability: effects of counter ion concentration and
pH
Julian A. Gallego-Urrea, Jenny Perez-Holmberg, Martin Hassellöv
Environmental Science-Nano - 2014-01-01 -
Multimethod 3D characterization of natural plate-like nanoparticles: shape effects on equivalent size
measurements
Julian A. Gallego-Urrea, Geert Cornelis, Julia Hammes, Martin Hassellöv
Journal of nanoparticle research - 2014-01-01 -
Silver nanoparticles and silver nitrate induce high toxicity to Pseudokirchneriella subcapitata, Daphnia magna and Danio
rerio
F. Ribeiro, Julian A. Gallego-Urrea, K. Jurkschat, A. Crossley, Martin Hassellöv, C. Taylor, A. Soares, S. Loureiro
Science of the Total Environment - 2014-01-01 -
On the exposure assessment of engineered nanoparticles in aquatic
environments
Julian A. Gallego-Urrea
- 2013-01-01 -
Exposure assessments of nanoparticles in aquatic environments – considerations, review and
recommendations
Rickard Arvidsson, Julian A. Gallego-Urrea, Sverker Molander, Martin Hassellöv
- 2013-01-01 -
Geographically distributed classification of surface water chemical parameters influencing fate and behavior of nanoparticles and colloid facilitated contaminant
transport.
Julia Hammes, Julian A. Gallego-Urrea, Martin Hassellöv
Water Research - 2013-01-01 -
Potential scenarios for nanomaterial release and subsequent alteration in the
environment
Bernd Nowack, James F. Ranville, Stephen Diamond, Julian A. Gallego-Urrea, Chris Metcalfe, Jerome Rose, Nina Horne, Albert a Koelmans, Stephen J. Klaine
Environmental Toxicology and Chemistry - 2012-01-01 -
Characterization of the effluent from a nanosilver producing washing
machine.
Julia Farkas, Hannes Peter, Paul Christian, Julian A. Gallego-Urrea, Martin Hassellöv, Jani Tuoriniemi, Stefan Gustafsson, Eva Olsson, Ketil Hylland, Kevin Victor Thomas
Environment international - 2011-01-01 -
Applications of particle-tracking analysis to the determination of size distributions and concentrations of nanoparticles in environmental, biological and food
samples
Julian A. Gallego-Urrea, Jani Tuoriniemi, Martin Hassellöv
TrAC Trends in Analytical Chemistry - 2011-01-01 -
Toxic effects of silver nanoparticles to natural freshwater microbial
communities
Maja Halling, Marianne Matzke, Julian A. Gallego-Urrea, Martin Hassellöv, Thomas Backhaus
Abstract book, SETAC Europe, 21th Annual Meeting, 15-19 Maj 2011, Milano , Italien - 2011-01-01 -
Uptake and effects of manufactured silver nanoparticles in rainbow trout (Oncorhynchus mykiss) gill
cells.
Julia Farkas, Paul Christian, Julian A. Gallego-Urrea, Norbert Roos, Martin Hassellöv, Knut Erik Tollefsen, Kevin V Thomas
Aquatic toxicology (Amsterdam, Netherlands) - 2011-01-01 -
Williams RJ: Research re-port on issues for consideration during development and refinement of fate models. Public Report of the NanoFATE
EU-project
Thomas Backhaus, E. L. Dumont, Michael Faust, Julian A. Gallego-Urrea, Martin Hassellöv, H. P. Jarvie, A. Johnsson, R. J. Williams
- 2010-01-01 -
Measurements of nanoparticle number concentrations and size distributions in contrasting aquatic environments using nanoparticle tracking
analysis
Julian A. Gallego-Urrea, Jani Tuoriniemi, Tobias Pallander, Martin Hassellöv
Environmental Chemistry - 2010-01-01 -
Effects of silver and gold nanoparticles on rainbow trout (Oncorhynchus mykiss)
hepatocytes.
Julia Farkas, Paul Christian, Julian A. Gallego-Urrea, Norbert Roos, Martin Hassellöv, Knut Erik Tollefsen, Kevin V Thomas
Aquatic toxicology (Amsterdam, Netherlands) - 2010-01-01 -
Analysis of behavior and toxicity to Pseudokirchneriella subcapitata of Titanium Dioxide
nanoparticles
Julian A. Gallego-Urrea, Martin Hassellöv, Thomas Backhaus, Jenny Perez-Holmberg, Henrik Johansson, Maja Karlsson, Lisa Janmar
4th International Conference on the Environmental Effects of Nanoparticles and Nanomaterials. Vienna, Austria, September 2009 - 2009-01-01