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Julian Alberto Gallego Urrea

Postdoctoral research fellow

Julian Alberto Gallego Urrea
Postdoctoral research fellow
Inorganic aquatic environmental chemistry
julian.gallego@marine.gu.se
+46 765-506372
0765-506372

Postal Address: Kristineberg 566, 450 34 Fiskebäckskil
Visiting Address: Kristineberg 566 , 450 34 Fiskebäckskil
Duties: Research and teaching


Department of Marine Sciences (More Information)
Box 461
405 30 Göteborg
Visiting Address: Carl Skottsbergs gata 22 B , 413 19 Göteborg

About 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

 

 

 

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.

NanoFASE
In Nanofase, our group is developing experimental approaches for the detection of engineered nanoparticles in estuarine and seawater. We are also collaborating in determining transformation rate constants (e.g. heteroaggregation) of nanoparticles relevant for mathematical modelling in a large scale basin modelling.

Earlier research

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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Latest publications

Fe(II) stability in seawater
Mark J. Hopwood, Carolina Santana-González, Julian A. Gallego-Urrea, Nicolas Sanchez, Eric P. Achterberg et al.
Biogeosciences Discussions, Journal article 2018
Journal article

Trace chemical species in marine incubation experiments, part A. Experiment design and bacterial abundance control extracellular H2O2 concentrations
Mark J. Hopwood, Nicolas Sanchez, Despo Polyviou, Øystein Leiknes, Julian A. Gallego-Urrea et al.
Biogeosciences Discussions, Journal article 2018
Journal article

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 et al.
Environmental Toxicology and Chemistry, Journal article 2018
Journal article

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 et al.
Environmental Toxicology and Chemistry, Journal article 2017
Journal article

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Showing 11 - 20 of 27

2015

2014

2013

2012

Potential scenarios for nanomaterial release and subsequent alteration in the environment
Bernd Nowack, James F. Ranville, Stephen Diamond, Julian A. Gallego-Urrea, Chris Metcalfe et al.
Environmental Toxicology and Chemistry, Journal article 2012
Journal article

2011

Characterization of the effluent from a nanosilver producing washing machine.
Julia Farkas, Hannes Peter, Paul Christian, Julian A. Gallego-Urrea, Martin Hassellöv et al.
Environment international, Journal article 2011
Journal article

Showing 11 - 20 of 27

Page Manager: Bo Johannesson|Last update: 7/1/2015
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