Aerosol Exposure

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Aerosol Science and Technology...

Title: 
Aerosol Science and Technology Enabling Energy Applications
Abstract: 

Aerosol science and engineering is an enabling discipline and has application in a number of areas such as electronics, materials, pharmaceuticals, energy and environment. A subsection of this discipline deals with nanoparticles – the building blocks of nanotechnology. 

The presentation will discuss the global challenges of Energy and Environment, and how nanoparticle aerosol science and technology can enable advanced energy technology solutions.   The “energy space” can be divided into two parts – the “energy haves” and the “energy have-nots”.  Both these sectors have equal numbers of people, and are important vis a vis energy and environmental issues.  The “energy haves” need to develop strategies for improving energy efficiency; whereas the “energy have nots” have to rely on sustainable energy solutions.  The importance of the energy –environmental nexus will be highlighted.  Energy technologies applicable over multiple time scales – from current fossil fuel use (e.g., novel modalities in coal combustion), to transitionary bio-fuels production and usage, to sustainable solar energy technologies (novel nanostructured materials) will be discussed.    A common theme that will be presented includes the use of aerosol routes for synthesis of nanomaterials, that are now enabling energy applications.  Applications of fundamental concepts of aerosol science and engineering that aid in addressing this “global challenge problem” will be discussed.

Presentation Type: 
Invited Presentation
Co-Authors
Author 1: 
Pratim Biswas
Additional Authors: 
no more authors
Author Roles
Corresponding Author: 
Pratim Biswas
Presenting Author: 
Pratim Biswas

Environmental nuisance caused ...

Title: 
Environmental nuisance caused by atmospheric pollution, odors and sedimentary particles
Abstract: 

The discomfort caused by air pollutants due to odors and sedimentary particles is presented in the form of reduced visibility, increased dirt, psychophysical and psychological stress, and impact on human health and the environment in general. Due to difficulties in quantifying the nuisance and the insufficient regulation on the subject, this paper aims to report work that has been done on issues relating to nuisances caused by the emission of sedimentary particles and odorant gases to show the relevance of this research and to establish directives to the tools and methodologies designed to quantify and to establish standards for managing nuisance provoked by atmospheric pollutants in urban regions.

Presentation Type: 
Poster
Co-Authors
Author 2: 
Jane Meri Santos
Author 3: 
Edilson Nascimento
Author 4: 
Samira Barbirato
Author 5: 
Israel Soares
Author 6: 
Milena Machado
Author 7: 
Andler Melo
Additional Authors: 
no more authors
Author Roles
Corresponding Author: 
Antonio Paula Nascimento
Presenting Author: 
Edilson Nascimento

Effects of biodiesel blending ...

Title: 
Effects of biodiesel blending on redox activity of particulate matter from diesel engine
Abstract: 

The influences of different blending percentages of biodiesel on redox activity of particulate matter (PM) are not well known. In this study, commercial petroleum-based diesel with 4% of soy biodiesel (B04), biodiesel blends of 50% (B50), and pure biodiesel (B100) were tested in an engine operated on a dynamometer. PM samples were collected with PM2.5 and the redox activity was measured in a redox activity assay based on the ability of the sample to transfer electrons from DTT to oxygen. The DTT assays are based on the generation of different oxidizing species by chemical PM constituents and provide important information for elucidating the health risks related to PM exposure.  In this reaction, components of the test sample act as catalysts, accepting electrons from DTT and transferring them to oxygen. Thus, the PM samples of known mass was incubated at 37oC with DTT (100 mM) in 0.1 M potassium phosphate buffer at pH7.4 (1mLtotal volume) for times varying from 15 to 90 min. The PM samples used here were assayed at concentrations of 5–40mg/mL-1. At the designated times, 1 mL of 10% trichloroacetic acid was added to the incubation mixture and a 0.5 mL aliquot of there action mixture mixed with 1mL of 0.4MTris–HCl, pH8.9 containing 20mM EDTA and 25mL of 10 mM DTNB. The concentration of the formed 5-mercapto-2-nitrobenzoic acid was measured by its optical density absorption at 412 nm. The results revealed that PM redox activity decrease apparently using the biodiesel blends. 

Presentation Type: 
Poster
Co-Authors
Additional Authors: 
no more authors
Author Roles
Corresponding Author: 
Aline Lefol Nani Guarieiro
Presenting Author: 
Arantza Eiguren-Fernandez