The long duration of the 2010 Eyjajallajökull eruption provided a unique opportunity to measure a widely dispersed volcanic ash cloud. Layers of volcanic ash were observed by the European Aerosol Research Lidar Network with a mean depth of 1.2 km and standard deviation of 0.9 km. In this paper we evaluate the ability of the Met Office’s Numerical Atmospheric-dispersion Modelling Environment (NA...

Large amounts of ash, generated from biomass gasification, often contaminate syngas and the ecosystem. This study showed that the ash obtained from the gasification of pine wood was primarily composed of carbon (15% to 25%), minerals (~21%), and oxygen (52% to 63%), and exhibited low surface area (8.4 to 11.2 m/g). The size of ash particles was between 600 nm and 600 μm. Calcium, potassium, and...

Effect of respirable fly ash particles inhalation on lungs of rats was investigated by exposing them to respirable aerosols of size classified power plant fly ash at average concentrations of up to 14.4 +/- 1.77 mg/m3 for 4 hr/day for 28 consecutive days. A remarkable increase was found in blood eosinophil counts of fly ash exposed animals. Biochemical indicators of pulmonary damage viz. lactat...

To assess white ash (Fraxinus americana) health status in the Allegheny Plateau region via 1) examination and refinement of existing FHM/FIA plot data and 2) establishment and sampling of additional ash health plots to enhance existing FHM/FIA data. This enhanced sampling will allow us to explore, in detail, how topographic position and site characteristics (e.g., soil pH and nutrition) are rel...

Fly ash from power plants is very toxic because it contains heavy metals. In this study fly ash was treated with a thermal plasma. Before their treatment, the fly ash was analyzed by many technics such as X-ray fluorescence, CHN elemental analysis, inductively coupled plasma atomic emission spectroscopy and scanning electron microscopy. With these technics, the composition, the chemical and phy...

Limited observational data exists on the physical interactions between volcanic ash particles and water vapor; yet it is thought that these interactions can strongly impact the microphysical evolution of ash, with implications for its atmospheric lifetime and transport, as well as formation of water and ice clouds. In this study, we investigate for the first time, the hygroscopic properties of ...

The management of Greenlandic municipal solid waste incineration (MSWI) fly ash could be improved. Presently, the fly ash is disposed of in Norway as the fly ash is classified as hazardous waste. Fly ash contains high amounts of leachable heavy metals, but also resources that could be beneficial for reuse. In electrodialytic remediation a direct current is applied to a contaminated particulate ...

Hunnicutt, Rachel E. M.S., Purdue University, December 2013. Emerald Ash Borer Adult Feeding Behavior and Ash Tree Management Decision Modeling: Relationships Between Pest and Host Tolerance Gradients. Major Professor: Jordan M. Marshall. Emerald ash borer (Agrilus planipennis Fairmaire, Buprestidae) is an invasive pest, introduced from Asia that attacks North American ash trees (Fraxinus spp.)...

*Correspondence: Thomas J. Browning, GEOMAR Helmholtz Centre for Ocean Research, Kiel, Wischhofstraße 1-3, Build. 12, D-24148 Kiel, Germany e-mail: [email protected] †Present address: Thomas J. Browning, GEOMAR Helmholtz Centre for Ocean Research, Kiel, Germany Transient micronutrient enrichment of the surface ocean can enhance phytoplankton growth rates and alter microbial community structur...

Genetic defects in the Rab27a or Munc13-4 gene lead to immunodeficiencies in humans, characterized by frequent viral and bacterial infections. However, the role of Rab27a and Munc13-4 in the regulation of systemic inflammation initiated by Gram-negative bacterium-derived pathogenic molecules is currently unknown. Using a model of lipopolysaccharide-induced systemic inflammation, we show that Ra...