Chromated copper arsenate-treated (cca) wood disposal faces environmental restrictions due to its toxicity, heavy metal leaching in storage sites, and greenhouse gas emissions during incineration. Thus, finding new management methods for this contaminated at the end of life is crucial. This study evaluated effect pyrolysis temperature (300, 400, 500 °C), particle size, biochar yield, behavior a...

Abstract. This article presents the results of studying distribution mercury in cores bottom sediments both background and technogenic Arctic lakes three regions: Kola North, Malozemelskaya tundra northwest Siberia. For all cores, elemental composition, granulometry, loss on ignition (LOI) were determined layer by layer. Mercury showed a significant excess local near-surface sedimentary layers ...

The particle size distribution of the resultant cobalt ferrite samples was determined from Scanning Electron Microscopy (SEM) images using the granulometry image analysis method. Results showed the nanosized particles of the samples. The X-Ray Diffraction (XRD) patterns of samples were also analyzed by Rietveld refinement method. The results indicated that the precipitated sample at 95 <sup...

Both exact and approximate counting of the number of frequent patterns for a given frequency threshold are hard problems. Still, having even coarse prior estimates of the number of patterns is useful, as these can be used to appropriately set the threshold and avoid waiting endlessly for an unmanageable number of patterns. Moreover, we argue that the number of patterns for different thresholds ...