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Ergonomi och Aerosolteknologi

Designvetenskaper | Lunds Tekniska Högskola

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Luftföroreningar och hälsorisker

Exjobb inom området:

Physicochemical transformations and interactions of airborne particles in our homes

What do we know about everyday exposures to airborne particles in our homes? Exposure to outdoor particles has been linked with increased morbidity and mortality. However, we spend the majority of our time in homes, where particles of both indoor and outdoor origin are found. Particle concentrations indoors frequently exceed by tenfold or more concentrations outdoors. Thus, a better understanding of exposures to particles in homes is needed. This project aims to assess the the physicochemical changes upon outdoor-to-indoor transport and to assess the interactions of particle- and gas phase pollutants of different origin in confined indoor spaces.

Contact: Aneta Wierzbicka, aneta.wierzbicka@design.lth.se

Can information gathered from questionnaires be used to estimate concentrations of particles in dwellings?

Personal exposure to airborne particles in epidemiological studies is mainly assessed on the basis of outdoor concentrations, whereas recent studies indicate that on average ~60% of exposure to submicrometer particles in homes is attributable to originate from indoor sources. There is a need to account for the contribution of indoor sources to submicrometer particle exposure. Conducting measurements in a large number of residences remains a challenge thus an alternative approach is suggested. This project aims to compare results obtained from developed model (with input data from questionnaires) to measured concentrations in 40 apartments.

Contact: Aneta Wierzbicka, aneta.wierzbicka@design.lth.se

In-flight composition measurements of metal nanoparticles

Aerosol Mass Spectrometry is a new method that allows on-line measurements of metal particle cores and organic surface contaminants/functionalizations. In this project we plan to calibrate the new method and apply it to a set of different metal particles synthesized by spark discharge in collaboration with the nanometer structure consortium at Lund University.

Contact: Joakim Pagels, 046-222 16 88, joakim.pagels@design.lth.se

Mixing state of Black Carbon in Fresh and Aged Biomass Combustion emissions

We recently carried out an intensive campaign to investigate black carbon (soot) emissions and how these are mixed with other components in emissions from residential wood combustion. The project can be focused on either physical particle properties (particle size, shape etc) or chemical properties (Black carbon, organic carbon, metals, potassium salts PAHs etc) of fresh biomass emissions as well as atmospherically aged particles.

Contact: Joakim Pagels, 046-222 16 88, Joakim.pagels@design.lth.se

In-cylinder measurements of diesel soot

Diesel exhaust is a major source to atmospheric concentrations of soot/Black Carbon. In this project we will use a completely new approach to sample soot directly from the cylinder as a function of the combustion cycle. We expect to get completely new information of soot particle concentrations and particle properties as a function of time in the combustion process. The project will be collaboration between Ergonomics and Aerosol Technology and Combustion Engines at LTH.

Contact: Joakim Pagels, 046-222 16 88, joakim.pagels@design.lth.se

Human exposure of phthalates

Humans are exposed to phthalates in the indoor environment. Phthalates are suspected to affect human hormone systems. The aim of the project is to determine uptake of phthalates trough skin and respiratory system. The project will involves development of aerosol measuring techniques for determination of deposition of phthalates in the human lungs.

Contact: Anders Gudmundsson, 046-222 40 75, anders.gudmundsson@design.lth.se

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