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Издательство: Якутский край
Год выпуска: 2001
Количество страниц: 100 с.
Количество страниц: 12 с.
The catastrophic wildfires that occurred in Central Yakutia in 2021 resulted in extensive forest destruction, leading to the complete incineration of significant forested areas. This devastation has caused the loss of tree stands and the degradation of forest litter, as well as the upper organic layers of the soil. Consequently, there has been a substantial alteration in the water-temperature regime of permafrost soils, which are formed under permafrost conditions. The objective of this study is to investigate the impact of these fires on the morphological, physical, and chemical characteristics of pale soils during the initial years following the fire event, specifically after the destruction of the tree stand and the combustion of the litter and organic soil layers. This research primarily focuses on pale, slightly solodized soils located within the larch forests of the Lena-Vilyui watershed. This research presents comprehensive insights into vegetation and the morphogenetic characteristics of soil profiles, alongside the parameterization of various soil properties, including field moisture, humus content, loss on ignition, , reactions of the soil environment, exchangeable base quantities, and granulometric composition. The findings indicate that the deposition of combustion byproducts, specifically in the form of ash, results in soil alkalization, which is associated with a marked decrease in organic carbon levels within the surface strata. Notably, the morphological characteristics of soils in the control area exhibit significant differences compared to those in the burned region; a thin pyrogenic layer with minimal screening effects has developed in the burned region, soil mixing processes have become more pronounced, and the natural horizontal boundaries of soil horizons have been disrupted. The degradation of heat-insulating ground cover and organic matter contributes to substantial soil heating, leading to elevated soil mass temperatures and an extended seasonal thaw. The thawing of upper permafrost layers and the release of previously sequestered moisture result in soil saturation, which, upon winter freeze, triggers cryoturbation. In contrast, soils that have not experienced fire exhibit only a weak expression of permafrost mixing within the soil profile. Furthermore, the temporary waterlogging of poorly drained soils in the initial years post-fire exacerbates tree.
Влияние крупных лесных пожаров на мерзлотные палевые почвы Лено-Вилюйского водораздела / Р. В. Десяткин, А. З. Иванова, А. Р. Десяткин [и др.] ; Институт биологических проблем криолитозоны СО РАН, Институт мерзлотоведения им. П. И. Мельникова СО РАН // Природные ресурсы Арктики и Субарктики. - 2024. - N 4, Т. 29. - C. 562-573. - DOI: 10.31242/2618-9712-2024-29-4-562-573
DOI: 10.31242/2618-9712-2024-29-4-562-573
Количество страниц: 9 с.
The article shows the relevance of the theory and practice of deep coal processing. The increasing relevance is based on modern trends in the development of the global coal industry and forecasts regarding the decrease in demand for coal in the energy sector due to the introduction of alternative energy sources. The Russian Federation has the richest raw material base of coals, including lignite. Due to the low degree of metamorphism, lignite’s are unique in their properties and are very promising as a raw material for the production of sorbents for the treatment of industrial, municipal and industrial wastewater. The aim of the study is to develop a process flow chart for alkaline activation of lignite coals in the Far Eastern region to obtain high-quality sorbents for adsorption from the liquid phase. The laboratory study was conducted on lignite coals from four deposits in the Far Eastern region (Kharanorskoye, Kangalasskoye, Kirovskoye, Okino-Klyuchevskoye deposits). General scientific and empirical methods were used: analysis and generalization of scientific literature on the research problem, experiment, analysis, comparison and mathematical processing of the obtained experimental data. A study was conducted of various options for carrying out three stages of the process of obtaining sorbents (preparation of lignite coal for activation, alkaline activation and final processing). Analysis of the obtained data on the sorption properties of the obtained samples made it possible to determine the optimal parameters and sequence of operations in the process of alkaline activation of lignite coals. A process flow chart for alkaline activation of lignite coals with potassium hydroxide has been developed, consisting of 14 operations, including thermal leaching and mechanical activation. Carrying out the process of alkaline activation of lignite according to this technological scheme allows obtaining sorbents with high adsorption activity for iodine (more than 90 %). The results of the research allow us to speak about the technological feasibility, high efficiency and prospects of processing lignite coals from deposits in the Far Eastern into sorbents.
Ворсина, Е. В.
Технологическая схема щелочной активации бурых углей Дальневосточного региона / Е. В. Ворсина, Т. В. Москаленко, В. А. Михеев ; Институт горного дела Севера им. Н. В. Черского // Природные ресурсы Арктики и Субарктики. - 2024. - N 4, Т. 29. - C. 553-561. - DOI: 10.31242/2618-9712-2024-29-4-553-561
DOI: 10.31242/2618-9712-2024-29-4-553-561
Издательство: Книжное издательство
Год выпуска: 1965
Количество страниц: 156 с.
Издательство: Медицина
Год выпуска: 1966
Количество страниц: 198 с.
Издательство: [б. и.]
Год выпуска: 1971
Количество страниц: 164 с.
Издательство: Триада
Год выпуска: 2003
Количество страниц: 208 с.
В работе представлен анализ заболеваемости и смертности от злокачественных новообразований населения Республики Саха за 2000 г., а также тенденции частоты их в 1965-2000 гг. и прогноз до 2005 г. Впервые опубликованы результаты оценки влияния изменения факторов риска наприрост заболеваемости отдельными формами злокачественных опухолей, приведены показатели социально-экономического ущерба в связи со смертностью от отдельных форм раковой патологии.В самостоятельном разделе впервые представлен уровень смертности от разных причин и данаоценка их социально-экономическим последствиям
Издательство: Институт биологии
Год выпуска: 1977
Количество страниц: 180 с.
Издательство: Якутское книжное издательство
Год выпуска: 1984
Количество страниц: 132 с.