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The present-day ecological state of the Upper Amur is assessed. Specific features of water quality formation are demonstrated. Local sources of aquatic environment pollution are identified. The distributions of metals in dissolved and suspended forms in the river reach are examined. 相似文献
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The mineral composition, distribution and fractionation of rare-earth elements in dissolved and suspended forms (solid residue) of atmospheric precipitation were studied by analyzing the snow sampled over urbanized territory by the example of the city of Blagoveschensk. Electron-microscopic studies revealed the own minerals of rare-earth elements in dust aerosols. It is shown that the main sources of the atmospheric pollution by rare-earth elements were emissions of TPP (heat and power plants) and boiler houses. Contrasting geochemical anomalies of rare-earth elements were found in the snow cover of the city. The REE concentrations in the solid phase of snow are few orders of magnitude higher than those of the liquid phase. The snow solid phase provides insight into the REE behavior, because it directly reflects the impact of different anthropogenic sources. The characteristic feature of the REE distribution in the solid residue of snow is their LREE enrichment relative to MREE and HREE. The average HREE content is 10% of total REE. In the snow water–solid phase system, most samples show weak fractionation between LREE and HREE owing to the low total mineralization of the snow liquid phase and the small content of organic matter. 相似文献
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L. M. Pavlova V. I. Radomskaya L. P. Shumilova A. M. Ionov V. V. Ivanov A. V. Poselyuzhnaya 《Geochemistry International》2018,56(5):450-461
Based on scanning electron microscopy, infrared spectroscopy, and X-ray photoelectron spectroscopy, it was shown that platinum sorption by the biomass of microscopic fungi occurs in several stages. Incipient interaction involves physical and chemical sorption and is followed by the reduction of adsorbed platinum ions to a zero-valence state at the expense of metabolic products of microorganisms and eventual aggregation of zero-valence particles to nanometer-sized forms. Model experiments revealed a high platinum sorption potential of the physiologically active biomass of microscopic fungi and their cell envelopes (chitin). 相似文献
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Pavlova L. M. Shumilova L. P. Radomskaya V. I. Sorokin A. P. Ivanov V. V. 《Doklady Earth Sciences》2019,488(2):1178-1181
Doklady Earth Sciences - Data on the species and strain specificity of micromycetes in the processes of toxic elements extraction from multicomponent solutions are obtained as results of modal... 相似文献
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Tarasova Yu. I. Budyak A. E. Ivanov A. V. Goryachev N. A. Ignatiev A. V. Velivetskaya T. A. Radomskaya T. A. Blinov A. V. Babyak V. N. 《Geology of Ore Deposits》2022,64(7):503-512
Geology of Ore Deposits - This paper provides new data on various pyrite and pyrrhotite generations at the Golets Vysochaishy gold deposit, Bodaibo district, Irkutsk Oblast. These generations are... 相似文献
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Water Resources - Сomposition of chemical elements in natural waters and rocks of the Albynskoe Gold Field have been studied to elusidate the possible environmental effects of open cast... 相似文献