Aerosols emitted by antropogenic activity are in relationship to their emission source and exhibit distinguishable characteristics (size, metal concentration and density) that can often univocally identify the source. Nevertheless, different processes can characterize industrial plants that produce the same product. Due to this, dusts emitted by the same source can have different chemical compo...

the present study aimed at assessing cement dust exposure and its relationship to lung function at a portland cement factory in ilam, iran. lung function tests were carried out on 112 workers at the cement factory in 2008-09. simultaneously 85 non exposed workers were used as control. lung function tests were performed for all subjects. additionally, total dust level was determined by the gravi...

A persistent question in industrial economics is the underpinning of the link between market concentration and price. How much of the link can be attributed to market power and how much to market efficiency? This paper develops a theoretical model to address that question. Applied to the US portland cement industry, the model indicates that both impacts matter. In relative terms, however, the m...

Hundreds of cement factories use online bulk material analyzers to improve their quality control for both raw material and kiln feed, and reduce their variability. The most used technology for online analysis is Prompt Gamma Neutron Activation Analysis (PGNAA), with Cf as the neutron source. Cost and short half-life of the Cf neutron sources are the main problems in cement industry. Therefore, ...

To improve the understanding of the immobilization mechanism and the leaching risk of Arsenic (As) in the cement product from coprocessing wastes using cement kiln, distribution and species of As in cement product were determined by microscale investigation methods, including electron probe microanalysis (EPMA) and X-ray absorption spectroscopy. In this study, sodium arsenate crystals (Na3AsO41...