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Nanoparticle fate under environmental conditions

It has been identified that most of the state-of-the-art nanomaterial analysis methods are not suited for or optimized to complex environmental samples. Therefore there is a joint project within Nanosphere to develop further some promising analytical methods, for example certain types of electron microscopy. Sample preparation, selective detection, image analysis and statistical power of the results are some of the aspects being currently looked into.

Studies on how aggregation and sedimentation processes at different natural water conditions are influencing the aquatic concentrations of TiO2 nanoparticles
One of the most important fate processes that need to be studied and parameterized to be able to predict the aquatic environmental concentrations is aggregation. If aggregation is occurring at a significant rate, then this will lead to a removal from the water column by sedimentation. In Nanosphere, both theory and models are being developmed and experimental validations are being performed. A tiered approach is taken to start with simple model solutions for mechanistic understanding to natural waters for higher relevance in the observations.

References

Julian Gallego, Jani Tuoriniemi, Tobias Pallander and Martin Hassellöv. Measurements of nanoparticle number concentrations and size distributions in contrasting aquatic environments using nanoparticle tracking analysis. Environmental Chemistry, 2010, Vol 7, p. 67-81

Julian A. Gallego-Urrea, Jani Tuoriniemi, Martin Hassellöv. Applications of particle-tracking analysis to the determination of size distributions and concentrations of nanoparticles in environmental, biological and food samples. Trends in Analytical Chemistry, 2011 30 (3), p. 473-483.

Nanoparticles moving in liquid solution

This movie shows how nanoparticles move in liquid solution. By tracking their motion, the size of the particles can be determined based on the Stokes-Einstein equation. This film was recorded using software from NanoSight (Read more here http://www.nanosight.com/).

Contact person

Caroline Jonsson

Page Manager: Robert Karlsson|Last update: 11/17/2014
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