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Location of the study site on a map by UNEP/DEWA/GRID-Europe (2007) showing the hazardous industrial sites, water pollution and mining hot spots in eastern Europe and photos of the investigated site (on the left); red dust map depicted in red over MIVIS band 13 (0.68 m) (on the right).
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... attained for the analyzed polluted soil samples show that, even on naturally red soils, the red dust deposited from wind is spectrally detectable if a high level of red dust is present on it. In Figure 7 is presented the map of the red dust distribution on soils as obtained by classifying airborne hyperspectral reflectance data using a simple and fast spectral-shape based algorithm (i.e. the Spectral Feature Fitting procedure, see Segl et al., 2003 and the references therein). The reference soil field spectra in the 0.4-2.5 m spectral region were scaled to match the image spectra after they were normalized with the continuum removal approach to allow the comparison of individual absorption features using a common baseline. ...
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The study compared coal fly and bottom ashes for their ability to inactivate metals and lead to soil remediation. Soil was artificially contaminated with Cu, Zn, Pb and Cd at five degrees. Next, both ashes were added at five rates: 0, 0.5, 1.0, 1.5 and 2.0% and all treatments incubated. Data showed that for moderately contaminated soils, ash rates...
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... Scanning Electron Microscope (SEM) was used for further analysis and interpretation of the experiment results. The results were obtained using micro-images of hardened water-retentive slurry with Ca(OH) 2 content of 10%, 15% and 20% after curing for 28d, as well as the GGBFS and fly ash [23,24]. Fig. 8 shows the SEM pictures of GGBFS, fly ash and the hardened water-retentive slurry. ...
Water-retentive asphalt concrete (WRAC), produced by incorporating water-retentive slurry (WRS) into porous asphalt concrete (PAC), could significantly reduce the surface temperature of pavements and is currently considered a promising tool for alleviating urban heat island effect. Based on laboratory test and microstructural analysis, the present study investigated the effects of varying the proportions of ground granulated blast furnace fly ash, calcium hydroxide and mixing water amount on workability of fresh WRS. In addition, the water absorbing capacity, compressive strength and flexural strength of the cured (hardened) WRS were determined. The microstructures of hardened WRS were examined using scanning electron microscopy in order to better understand the effect of hydration level and pore structure on the water absorbing capacity and mechanical properties of hardened WRS. The results showed that materials composition have significant effects on the water absorbing capacity, compressive strength and flexural strength of hardened water-retentive slurry, as well as the workability of fresh WRS. WRAC showed good moisture resistance, rutting resistance and low deformation resistance comparable to the control PAC. However, the use of WRAC resulted in a temperature drop of about 10 °C compared to the control PAC.
... To utilize both these wastes together without any chemical stabilizer, an investigation was undertaken by Liu et al. (2007) to develop a process for the manufacture of building materials using conventional sintering method. The characterization of fly ash in the basis of chemical composition analysis was mostly focused by areas of multi-Technique application for waste material detection and soil remediation strategies (Belviso et al., 2011). Those investigations, focused in the development of red mud with fly ash mixtures in order to obtain marketable ceramics materials, have some benefits, e.g., saving of resources such as; raw material and energy, improving the quality of the product, and finally reducing the cost due to use of the waste materials in the process (Yang and Xiao, 2008). ...
The aim of the research is to analyze the first five universities in the GreenMetric ranking in 2019 and 2020 and the first five universities from Turkey in the context of green management studies and compare the two groups with each other. In the first stage of the research, the web pages and activity reports of the universities that formed the sample were examined. In the second stage, according to the GreenMetric criteria, the changes in the scores of the universities in settlement and infrastructure, energy and climate change, waste, water, transportation, education and research applications in 2019 and 2020 were monitored, and comparisons between universities were made according to the scores. Although the efforts of the universities in the top five in the 2019-2020 GreenMetric ranking and the first five universities from Turkey that entered the GreenMetric are similar to each other, it has been observed that the universities in the top of the list have relatively higher integration with their internal and external stakeholders compared to Turkish universities. In terms of GreenMetric sub-dimensions, Turkish universities score relatively better than some of the universities that are at the top of the list in the fields of water, transportation and education-research, while with very large score differences compared to the top five universities in settlement and infrastructure, energy and climate change and waste items.
