Bibliografie tematiche / Natural and technogenic materials

Letteratura scientifica selezionata sul tema "Natural and technogenic materials"

Autore: Grafiati

Pubblicato: 8 giugno 2024

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Articoli di riviste sul tema "Natural and technogenic materials":

Kenzhaliyev, Bagdaulet, Tatiana Surkova, Ainur Berkinbayeva, Leila Amanzholova, Brajendra Mishra, Bekzat Abdikerim e Dinara Yessimova. "Modification of Natural Minerals with Technogenic Raw Materials". Metals 12, n. 11 (7 novembre 2022): 1907. http://dx.doi.org/10.3390/met12111907.

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The presence of uranium-containing wastes from large provinces in the Republic of Kazakhstan significantly complicates the ecological situation, causing damage to the soil and hydrosphere due to the uncontrolled spread of large volumes of natural waters contaminated with radionuclides. They are usually utilized by the sorption method; however, the use of synthesized sorption materials is limited by their high price, and natural minerals are limited by low sorption characteristics. Many modification options are used in order to improve the sorption characteristics, but only a few methods have been found applied in industry. The main disadvantages include the complexity in the application and modification of reagents rarely used in industrial practice, which increases their cost, and is an obstacle to their widespread use. The authors of this research have studied the possibility of using technogenic raw materials—slags of phosphorus production—as a modifier of natural minerals. The methods of slag activation are investigated, the optimal conditions for the modification of the natural minerals zeolite and shungite by activated slag are determined, and the sorption properties of modified sorbents are studied.

Gerasimova, Lidia G., Ekaterina S. Shchukina e Anatoly I. Nikolaev. "Titanium-containing functional materials from natural raw materials and technogenic waste". Transactions of the Kоla Science Centre of RAS. Series: Engineering Sciences 1, n. 1/2023 (29 marzo 2023): 92–95. http://dx.doi.org/10.37614/2949-1215.2023.14.1.017.

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Natural mineral raw materials, as a rule, have a complex composition. Its processing with the release of one or two components is accompanied by the formation of a large amount of waste, including man-made, which is harmful to the environment. In this regard, the problem of its complex processing is important and remains relevant in setting the directions of scientific research to improve existing and development of new technologies.

Auyesbek, S. T., N. B. Sarsenbayev, B. K. Sarsenbayev, T. M. Khudyakova, Zh T. Aimenov, K. S. Abdiramanova, Т. S. Aubakirova et al. "THERMAL INSULATING MATERIALS BASED ON MAGNESIUM-CONTAINING TECHNOGENIC RAW MATERIALS". RASAYAN Journal of Chemistry 16, n. 01 (2023): 413–21. http://dx.doi.org/10.31788/rjc.2021.1616927.

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The article considers the possibility of replacing traditional mineral raw materials (dolomite and asbestos) to obtain thermal insulating material – sovelite – with technogenic raw materials, i.e. tails of polymetallic ores (dolomitebarium tails) and synthetic wollastonite, obtained on the basis of phosphoric slag. The research results allowed us to establish that the dolomite-barium “tails” can serve as a technogenic raw material base to obtain thermal insulating material – sovelite. The advantages of the proposed technology to obtain thermal insulating material –sovelite– in comparison with the traditional one allow for reducing energy costs for production due to the absence of stages of raw material extraction, crushing, and grinding, a reduced firing temperature, the absence of the stage of grinding the fired product since during firing there is waste dispersion, natural dolomite saving, replacement of expensive natural reinforcing material – chrysotile asbestos–with synthetic wollastonite, obtained on the basis of phosphoric slag. The use of synthetic wollastonite significantly improves the quality characteristics and increases the service life of the products.

Peregudov, Yu S. "Magnetic Oil Sorbents based on Technogenic and Natural Inorganic Materials". Ecology and Industry of Russia 25, n. 2 (10 febbraio 2021): 34–40. http://dx.doi.org/10.18412/1816-0395-2021-2-34-40.

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The results of the study of the fractional composition, physicochemical and sorption characteristics of technological calcium carbonate and glauconite are presented. It is shown that the fraction of technological chalk with a particle size of more than 0.125 mm absorbs the greatest amount of oil and gasoline. The oil is better absorbed by the fraction of chalk with a particle size of 0.1–0.25 mm. For glauconite, oil sorption increases with decreasing particle size. The complete absorption of oil on the solid surface by the glauconite sorbent occurred within 2 min and about 10 min by the carbonate sorbent; the recovery rates were 99% and 90%, respectively. The best results in terms of the degree of water purification from oil were shown by a carbonate sorbent with a particle size of more than 0.125 mm – 83 % and glauconite with a particle size of 0.045–0.1 mm – 90% with an oil film thickness of 0.5 mm. The degree of water purification from oil was 80 % for the carbonate sorbent and 93 % for the glauconite one with an oil film thickness of 0.5 mm. With an increase in the thickness of the oil and oil films, the degree of water purification decreases.

Erdman, S. V., K. M. Gapparova, T. M. Khudyakova e A. V. Tomshina. "Magnesia Binder Preparation from Local Natural and Technogenic Raw Materials". Procedia Chemistry 10 (2014): 310–13. http://dx.doi.org/10.1016/j.proche.2014.10.052.

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Timofeeva, S. S., V. V. Garmyshev e D. V. Dubrovin. "Assessment of the Contribution to the Pollution of the Atmosphere of Technogenic and Natural Fires in the Irkutsk Oblast". Ecology and Industry of Russia 22, n. 9 (21 settembre 2018): 67–71. http://dx.doi.org/10.18412/1816-0395-2018-9-67-71.

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On the example of the Irkutsk oblast, the problem of air pollution with technogenic and natural fires is considered. The factual basis of the study was the statistics of the consequences of fires in residential, public, industrial and other objects of the technosphere and natural fires, also combustion of forest combustible materials in the residential, landscape-recreational, forest-park, suburban zones of cities and settlements for 2011-2016. On the basis of existing approaches, qualitative and quantitative indicators of burned materials are determined as a result of technogenic and natural fires, ignition, and specific indicators of toxicant emissions in the combustion of various types of materials, which allowed to comprehensively determine the gross emissions of pollutants in the Irkutsk oblast. It is established that as a result of technogenic and natural fires, ignitions, the annual gross emissions of pollutants averaged about 18.2% of the mass of stationary sources of pollution in the oblast.

S.P., Kochetkov, Bryl S.V., Smirnov N.N., Rukhlina N.I. e Rukhlin G.V. "Conditioning techniques technogenic raw materials used for binders". Ekologiya i stroitelstvo 2 (2017): 16–24. http://dx.doi.org/10.35688/2413-8452-2017-02-003.

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For production of binding building materials in Russia and worldwide, used a variety of calcium-containing natural raw material: calcium carbonates, aragonite (CaCO3); sulfates-gypsum (CaSO4∙2H2O,CaSO4); oxides and hydroxides (bauxite glinozemservice); perforate-apatites and phosphates (Ca5∙(PO4)3∙F). The article discusses the need for air-conditioning of phosphogypsum to ensure that he was suitable without restrictions for processing into high-quality gypsum binders.

Шеина, С. Г., М. С. Сайдумов, И. С.-А. Муртазаев e М. П. Маслаков. "COMPLEX ORGANOMINERAL SUPPLEMENT USING NATURAL AND MAN-MADE RAW MATERIALS". Вестник ГГНТУ. Технические науки, n. 2(28) (26 agosto 2022): 108–15. http://dx.doi.org/10.34708/gstou.2022.77.99.010.

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Статья посвящена проблеме разработки органоминеральной добавки для проектирования современных высококачественных строительных композитов с применением некондиционного природного и техногенного сырья. В статье представлены результаты исследований по изучению запасов сырья Чеченской и соседних республик и областей, с целью установления возможности для получения на их основе современных высококачественных композитов для возведения строительных конструкций и производства строительных работ. Приведен сравнительный анализ данных по изучению технологических (подвижность, удобоукладываемость и др.), физических, механических и деформативных свойств, как бетонной смеси на различном сырье, так и бетона. Определены свойства и структура строительных композитов, полученных с использованием органоминеральной добавки на основе техногенного сырья. Установлено, что бетоны на основе местного техногенного и природного сырья характеризуются повышенной прочностью (50 МПа и выше), сохраняемостью (более 10 час.), незначительными значениями относительных деформаций усадки (не более 0,6-0,75 мм/м), меньшим размером пор, а значит, и повышенными показателями долговечности. The article is devoted to the problem of developing an organomineral additive for the design of modern high-quality building composites using substandard natural and technogenic raw materials. The article presents the results of research on the study of the reserves of raw materials in the Chechen and neighboring republics and regions, in order to establish the possibility of obtaining on their basis modern high-quality composites for the construction of building structures and the production of civil works.A comparative analysis of data on the study of technological (mobility, workability, etc.), physical, mechanical and deformation properties of both a concrete mixture based on various raw materials and concrete is given. The properties and structure of building composites obtained using an organomineral additive based on technogenic raw materials have been determined.It has been established that concretes based on local technogenic and natural raw materials are characterized by increased strength (50 MPa and more), shelf life (more than 10 hours), insignificant values of relative shrinkage deformations (no more than 0.6-0.75 mm/m), smaller size pores, and, therefore, increased durability.

Petlovanyi, M., K. Sai, O. Borysovska e A. Khorolskyi. "ANALYSIS OF THE USE OF INDUSTRIAL WASTE FOR THE FORMATION OF BACKFILL MASS IN MAN-MADE VOIDS". Naukovyi visnyk Donetskoho natsionalnoho tekhnichnoho universytetu, n. 1 (2023): 115–26. http://dx.doi.org/10.31474/2415-7902-2023-1-115-126.

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Purpose. The objective of this study is to examine and compile a list of the most common types of backfill materials based on the analysis of successful backfilling practices in the development of technogenic cavities in mineral deposits in Ukraine. Methodology. The study employed theoretical analysis, information systematization, and data synthesis related to the research problem. It investigated the characteristics of different backfilling methods and the experience of using backfill materials in various countries where backfilling practices have been implemented. The study relied on data from government statistics, waste disposal sites, regional environmental reports, and the environmental passport of a leading region in industrial waste accumulation. Results. The study determined that insufficient attention has been given to the analysis and study of various types of industrial waste and their potential utilization as backfill materials for filling technogenic cavities in Ukraine. The main advantages and disadvantages of existing backfilling methods commonly used in mining practice have been analyzed. Among these methods, solidifying backfilling was found to be the most promising in terms of geotechnical stability and reliability of the artificial mass. Based on the analysis of successful backfilling practices, a priority list of the most common types of backfill materials has been made. Additionally, the study examined the volumes of waste accumulation and occupied areas for different types of backfill materials using a leading region as an example. Scientific novelty. The study has identified the most practical and characteristic types of natural and technogenic backfill materials that can be considered for the development of backfilling practices for technogenic cavities in Ukraine. Practical significance. The study of natural and technogenic waste materials, their accumulation parameters, and characteristics is an important step towards the development of effective backfilling practices for technogenic cavities and subsequent restoration of disturbed territories.

Saydumov, M. S., S. A. Y. Murtazaev, A. Kh Alaskhanov, I. S. Dagin e M. R. Nakhayev. "Man-Made Waste as a Raw Material Base for the Production of Modern Construction Composites". Ecology and Industry of Russia 23, n. 7 (19 luglio 2019): 31–35. http://dx.doi.org/10.18412/1816-0395-2019-7-31-35.

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The results of tests of secondary construction materials derived from man-made materials are presented. The granulometric and chemical compositions of secondary products from technogenic raw materials are investigated. The analysis of local natural and man-made raw materials base of the Chechen Republic. The possibilities of using local natural raw materials (crushed stone from gravel, natural sand, gravel, gypsum, cement, etc.) in the technology of building composite materials are shown. The suitability and efficiency of the use of technogenic raw materials in concrete and mortar technology, justified by the complex economic and environmental effect of its use in the practice of building materials science, have been experimentally proved. It has been established that with the introduction of advanced innovations in the field of concrete science it is possible to produce competitive products that are not inferior to foreign analogues.

Più fonti

Tesi sul tema "Natural and technogenic materials":

Hostyn, Guillaume. "Contribution des fractions granulométriques grossières au fonctionnement des sols très anthropisés". Electronic Thesis or Diss., Université de Lorraine, 2022. http://www.theses.fr/2022LORR0088.

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Les approches de requalification de sites dégradés répondent de plus en plus à un double enjeu de dépollution et de valorisation. Les sols de ces sites, dits « sols très anthropisés », sont très souvent caractérisés par un fonctionnement dégradé lié aux processus anthropo-génétiques à l'œuvre dans ces contextes. Ces processus sont à l'origine de la présence dans ces sols de matériaux exogènes technogéniques ou naturels en quantités et natures variées. Dans ce contexte, les études et réflexions sur leur gestion s'effectuent classiquement sur la fraction fine, obtenue après tamisage à 2 mm, et laisse de côté la fraction dite « grossière », souvent surreprésentée (jusqu'à 50-60 % en masse). Or cette fraction, souvent considérée comme inerte, ne l'est pas nécessairement et sa présence peut éventuellement orienter le fonctionnement des écosystèmes et leur gestion future. Une approche méthodologique a alors été développée grâce à laquelle les dimensions et la nature des objets à étudier ont été précisément définis à travers l'utilisation d'une échelle granulométrique adaptée et la construction d'une typologie. Le couplage de cette approche à des caractérisations physico-chimiques a démontré la capacité de discrimination de la stratégie de tri mise en œuvre. La typologie a ainsi pu être amendées avec les informations liées aux composés caractéristiques des catégories de matériaux identifiées. Sur cette base, cinq matériaux modèles (anthracite, brique, calcaire, coke de pétrole et laitier de haut fourneau) ont été sélectionnés afin d'aider à la généralisation des résultats. Un processus d'adaptation des méthodes standardisées d'analyses de sol a alors été développé afin d'évaluer la réactivité des fractions granulométriques grossières. Ces dernières ne sont pas inertes et leur réactivité, bien qu'elle soit réduite par rapport à la fraction fine d'un point de vue massique, est uniquement dépendante du type de matériau et de la surface des particules. Pris seuls, les matériaux modèles sélectionnés présentent un niveau de fertilité insuffisant pour le développement du végétal et ne sont que marginalement à l'origine d'une toxicité. Ces résultats indiquent, qu'au sein du sol, les fractions grossières constituent un stock pérenne d'éléments mobilisables dans le temps à travers le processus d'altération mis en jeu par la pédogenèse. Ceci a été confirmé avec des essais de culture de végétaux sur des substrats à la formulation originale associant fractions grossières, fractions fines et matériaux inertes en conditions contrôlées en laboratoire et en lysimètres à l'échelle pilote de terrain. La contribution directe des fractions grossières à l'alimentation de la solution du sol en éléments puis à la nutrition minérale des végétaux est mise en évidence à court et à moyen termes. Ces fractions jouent également un rôle majeur dans le fonctionnement hydrique du sol en contribuant significativement à la rétention, au stockage de l'eau et à la libération d'éléments. Le type de matériau apparaît être le facteur principal gouvernant l'intensité de ces effets. Ces travaux de thèse ont ainsi permis de replacer les fractions granulométriques grossières dans un rôle actif dans le fonctionnement et l'évolution des sols très anthropisés. Les résultats obtenus apportent des connaissances nouvelles pour le génie pédologique et les acteurs de la gestion des sols très anthropisés. A cet effet, une procédure systématique de diagnostic des fractions granulométriques grossières a été proposée dont les effets doivent servir deux objectifs, i) enrichir les connaissances liées aux constituants des fractions grossières et ii) permettre une prise de décision éclairée, basée sur une connaissance plus complète du contenu d'un sol très anthropisé, autorisant une meilleure gestion en fonction du type de renaturation visée
The approaches of requalification of degraded sites increasingly answer the double challenge of depollution and valorization. The soils of these sites, known as "highly anthropized soils", are often characterized by a disturbed functioning due to anthropogenetic impacts. In particular, anthropic actives are responsible for the presence in these soils of exogenous materials, from both technogenic or natural origins, in varying quantities and natures. In this context, all the diagnoses and considerations regarding their management are carried out on the fine fraction, obtained after sieving at 2 mm, and ignore the so-called "coarse" fraction, which is often overrepresented (up to 50-60% by mass). This fraction, considered as inert, may not necessarily be so and its presence may have important consequences on the functioning of ecosystems and their future management.A dedicated methodological approach was developed. First, the dimensions and nature of the objects to be studied were precisely defined using an appropriate granulometric scale and the construction of a typology. This approach coupled to physico-chemical characterizations confirmed the efficiency of the tested screening strategy and fully enabled a precise and meaningful discrimination among coarse materials. The typology was thus implemented with composition characteristics of the material categories. On this basis, five reference materials (anthracite, brick, limestone, petroleum coke and blast furnace slag) were selected in order to allow for the generalization of the results. An adaptation process of standard soil analysis methods was then developed in order to assess the reactivity of coarse granulometric fractions. Results showed that coarse fractions are not inert. Their reactivity, although reduced compared to the fine fraction from a mass point of view, is only dependent on the type of material and the surface of the particles. Taken alone, the selected model materials present an insufficient level of fertility for plant development and are only marginally at the origin of toxicity. In an overall soil system, the coarse fraction constitutes a perennial stock of elements of interest that can be mobilized over time through the weathering processes generated by pedogenesis. The direct contribution of coarse fractions to plant nutrition was confirmed both under controlled conditions in the laboratory and in lysimeters at the pilot field scale. They also significantly contribute to water retention and storage. The type of material is the main factor governing the intensity of these effects.This thesis work has thus positioned the coarse granulometric fractions as being an active part of the functioning of highly anthropized soils. The results obtained provide new knowledge for stakeholders involved in soil engineering and highly anthropized soils management. To this end, a systematic procedure of diagnosis of coarse granulometric fractions has been proposed, the effects of which should serve two purposes, i) to enrich the knowledge related to the constituents of coarse fractions and ii) to allow an insightful decision-making process, based on a complete knowledge of the reality of a highly anthropized soil, authorizing an optimal and sensible management according to the targeted type of renaturation

Huang, Weichun. "Acoustic properties of natural materials". Thesis, Le Mans, 2018. http://www.theses.fr/2018LEMA1031/document.

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Dans cette thèse, nous étudions un métamatériau inspiré de la paille de blé pour l'absorption parfaite du son. Une botte de paille estidéalisée comme un milieu poreux anisotrope, composé d’un arrangement périodique très concentré de tubes creux cylindriques. L’approche théorique de ce métamatériau repose sur l'homogénéisation asymptotique à deux échelles d'un réseau perméable de résonateursparfaitement rigides dont la physique est enrichi par des résonances internes. Les principales caractéristiques de ce milieu poreux sont lacompressibilité effective négative autour de la résonance du tube et la réduction drastique de la vitesse de propagation du son (slowsound) à très basse fréquence. Une configuration optimale est conçue, basée sur la condition de couplage critique, pour laquelle la fuited’énergie du système résonnant ouvert est parfaitement compensée par les pertes intrinsèques induites par les pertes viscothermiques.Des mesures en tube à impédance sont effectuées sur des échantillons fabriqués par impression additive pour valider les résultatsthéoriques. Nous montrons que ce métamatériau est un absorbeur sub-longueur d'onde capable d’une absorption parfaite à très bassefréquence et d'introduire une quasi-bande interdite autour de la résonance du tube. De plus, la nature anisotrope de ce matériau conduit àune absorption globalement élevée à basse fréquence et ce pour toutes les incidences. Cette étude offre la possibilité de concevoir unabsorbeur acoustique sélectif en angle et en fréquence. Pour conclure, les résultats de cette thèse montrent que la paille est un boncandidat pour une absorption acoustique parfaite
Straw-inspired metamaterials for sound absorption are investigated in this Thesis. A straw stack is idealized as a highly concentratedresonant anisotropic porous medium constituted of a periodic arrangement of densely packed cylindrical hollow tubes. The approach tothis metamaterial relies on the two-scale asymptotic homogenization of a permeable array of perfectly rigid resonators, where the physicsis further enriched by tailoring inner resonances. The main features of such sound absorbing medium are the possibility for the effectivecompressibility to become negative around the tube resonance and the drastic reduction of the effective sound speed (slow sound) at verylow frequency in the system. Moreover, an optimal configuration for sound absorption is designed, based on the critical couplingcondition, in which the energy leakage out of the open resonant system is perfectly compensated by the intrinsic losses induced by thevisco-thermal losses both in the anisotropic matrix and in the resonators. Impedance tube measurements are performed on 3-D printedsamples with controlled parameters to validate the theoretical results. This metamaterial is a sub-wavelength absorber that can achievetotal absorption at a very low frequency and possesses a quasi-band-gap around the tube resonance. Furthermore, the anisotropic nature ofthe configuration gives rise to high absorption at low-frequency range for all incidences and diffuse field excitation. It paves the way tothe design of angular and frequency selective sound absorber. To conclude, the results of this Thesis show that straw is a good candidatefor perfect sound absorption

Kozii, Ivan, e Іван Козій. "Using a highly efficient gas cleaning equipment for reduction technogenic impact on the environment". Thesis, National Aviation University, 2021. https://er.nau.edu.ua/handle/NAU/50966.

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1. Matus K.J., Nam K.-M., Selin N.E., Lamsal L.N., Reilly J.M. Health Damages from Air Pollution in China. Global Environmental Chang, 2012, vol. 22, no. 2, pp. 55-66. 2. Tronvil P. Developing standards: Global standards for air cleaning equipment. Filtration & Separation, 2008, vol. 45, no. 9, pp. 28-31. 3. Hession M. Incinerator and gas cleaning equipment overview. Health Estate J., 1997, vol.51, no. 8, pp. 6-7.
Growth in the scale of economic activity leads to increased human impacts and disturbance of equilibrium in the environment. Along with the depletion of natural resources increases environmental pollution, in particular water and air. This significantly undermines the natural resource potential of the state’s development, negatively affects the welfare and health of the population, and poses a threat to environmental safety. Consuming natural resources, industrial enterprises are sources of complex environmental contamination. Activities of industrial enterprises has a negative impact on the state of ecosystems surrounding areas. Deposition of contaminants from the waste gases results in contamination of the soil and migration of heavy metals in the groundwater and surface water. The problem is compounded by the fact that the exhaust gases contain different by dispersion of the solid particles. This poses the problem of the development of environmental protection measures for air protection from emissions of industrial enterprises. One way to reduce the amount of pollutants released into the air with the flue gases is the selection of highly efficient gas-cleaning equipment, which must take into account several factors: physical and chemical characteristics of the carrier gas, the characteristics of chemical and particulate contaminants.
Зростання масштабів економічної діяльності призводить до посилення людського впливу та порушення рівноваги в навколишньому середовищі. Разом з виснаженням природних ресурсів збільшується забруднення навколишнього середовища, зокрема води та повітря. Це суттєво підриває природно-ресурсний потенціал розвитку держави, негативно впливає на добробут та здоров’я населення та створює загрозу екологічній безпеці. Споживаючи природні ресурси, промислові підприємства є джерелами складного забруднення навколишнього середовища. Діяльність промислових підприємств негативно впливає на стан екосистем навколишніх територій. Відкладення забруднень із відпрацьованих газів призводить до забруднення ґрунту та міграції важких металів у підземні та поверхневі води. Проблема ускладнюється тим, що вихлопні гази містять різні за рахунок дисперсії твердих частинок. Це ставить проблему розробки природоохоронних заходів щодо захисту повітря від викидів промислових підприємств. Одним із способів зменшити кількість забруднюючих речовин, що викидаються в повітря з димовими газами, є підбір високоефективного газоочисного обладнання, яке повинно враховувати декілька факторів: фізичні та хімічні характеристики газу-носія, характеристики хімічних та твердих частинок забруднювачі.

Wegst, Ulrike G. K. "The mechanical performance of natural materials". Thesis, University of Cambridge, 1996. https://www.repository.cam.ac.uk/handle/1810/272820.

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Kim, Edward Soo. "Data-mining natural language materials syntheses". Thesis, Massachusetts Institute of Technology, 2019. https://hdl.handle.net/1721.1/122075.

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This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.
Thesis: Ph. D., Massachusetts Institute of Technology, Department of Materials Science and Engineering, 2019
Cataloged from student-submitted PDF version of thesis.
Includes bibliographical references.
Discovering, designing, and developing a novel material is an arduous task, involving countless hours of human effort and ingenuity. While some aspects of this process have been vastly accelerated by the advent of first-principles-based computational techniques and high throughput experimental methods, a vast ocean of untapped historical knowledge lies dormant in the scientific literature. Namely, the precise methods by which many inorganic compounds are synthesized are recorded only as text within journal articles. This thesis aims to realize the potential of this data for informing the syntheses of inorganic materials through the use of data-mining algorithms. Critically, the methods used and produced in this thesis are fully automated, thus maximizing the impact for accelerated synthesis planning by human researchers.
There are three primary objectives of this thesis: 1) aggregate and codify synthesis knowledge contained within scientific literature, 2) identify synthesis "driving factors" for different synthesis outcomes (e.g., phase selection) and 3) autonomously learn synthesis hypotheses from the literature and extend these hypotheses to predicted syntheses for novel materials. Towards the first goal of this thesis, a pipeline of algorithms is developed in order to extract and codify materials synthesis information from journal articles into a structured, machine readable format, analogous to existing databases for materials structures and properties. To efficiently guide the extraction of materials data, this pipeline leverages domain knowledge regarding the allowable relations between different types of information (e.g., concentrations often correspond to solutions).
Both unsupervised and supervised machine learning algorithms are also used to rapidly extract synthesis information from the literature. To examine the autonomous learning of driving factors for morphology selection during hydrothermal syntheses, TiO₂ nanotube formation is found to be correlated with NaOH concentrations and reaction temperatures, using models that are given no internal chemistry knowledge. Additionally, the capacity for transfer learning is shown by predicting phase symmetry in materials systems unseen by models during training, outperforming heuristic physically-motivated baseline stratgies, and again with chemistry-agnostic models. These results suggest that synthesis parameters possess some intrinsic capability for predicting synthesis outcomes. The nature of this linkage between synthesis parameters and synthesis outcomes is then further explored by performing virtual synthesis parameter screening using generative models.
Deep neural networks (variational autoencoders) are trained to learn low-dimensional representations of synthesis routes on augmented datasets, created by aggregated synthesis information across materials with high structural similarity. This technique is validated by predicting ion-mediated polymorph selection effects in MnO₂, using only data from the literature (i.e., without knowledge of competing free energies). This method of synthesis parameter screening is then applied to suggest a new hypothesis for solvent-driven formation of the rare TiO₂ phase, brookite. To extend the capability of synthesis planning with literature-based generative models, a sequence-based conditional variational autoencoder (CVAE) neural network is developed. The CVAE allows a materials scientist to query the model for synthesis suggestions of arbitrary materials, including those that the model has not observed before.
In a demonstrative experiment, the CVAE suggests the correct precursors for literature-reported syntheses of two perovskite materials using training data published more than a decade prior to the target syntheses. Thus, the CVAE is used as an additional materials synthesis screening utility that is complementary to techniques driven by density functional theory calculations. Finally, this thesis provides a broad commentary on the status quo for the reporting of written materials synthesis methods, and suggests a new format which improves both human and machine readability. The thesis concludes with comments on promising future directions which may build upon the work described in this document.
by Edward Soo Kim.
Ph. D.
Ph.D. Massachusetts Institute of Technology, Department of Materials Science and Engineering

Lowe, David James. "Natural rubber/organoclay nanocomposites". Thesis, Queen Mary, University of London, 2012. http://qmro.qmul.ac.uk/xmlui/handle/123456789/2971.

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Natural rubber (NR)/organoclay nanocomposites were prepared using organomontmorillonite (OMMT) and organo-sepiolite (OSEP). Both were found to improve modulus significantly more than equivalent amounts of conventional fillers such as carbon black for strains up to 100%. OSEP was found to increase modulus more than OMMT for a given filler content, and NR/OSEP nanocomposites also had potentially anisotropic physical properties. OMMT had more effect on vulcanisation than OSEP, although both produced considerable acceleration. The tensile stress-strain behaviour of NR/OMMT and NR/OSEP nanocomposites were studied using a number of different micromechanical models. Some models were found to give a good empirical fit with experimental data, with the best results given by the Halpin-Tsai model. Furthermore, by analysis of the vulcanisation behaviour using rheometry, and particle morphology using transmission electron microscopy (TEM), it was possible to accurately estimate the Young's modulus of a nanocomposite from knowledge of the cure onset time and the shape factor of the particles. It was discovered that unmodified montmorillonite and sepiolite clays could undergo organic modi cation in situ during mixing into NR following the addition of a suitable modifier. This resulted in vulcanisates with very similar physical properties to those found when using pre-modified OMMT or OSEP. TEM and X-ray diffraction showed that the exfoliation state of the clay modified in situ was also similar to that of pre-modified organoclay. Silane coupling agents were also used with NR/OMMT and NR/OSEP nanocomposites, producing significant increases in modulus. However, the increased modulus was only observed above 40% strain for OMMT and above 25% for OSEP. The coupling agents strengthens the rubber- ller interface preventing interfacial slippage and cavitation in the nanocomposite, and these mechanisms only begin to operate when the interfacial stress reaches a significant level. The most effective coupling agent used was bis[triethoxysilylpropyl] tetrasulfide due to its relatively high reactivity.

Holcroft, Neal. "Natural fibre insulation materials for retrofit applications". Thesis, University of Bath, 2016. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.707590.

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Improving the thermal performance of existing domestic buildings can have multiple benefits: reducing greenhouse gas emissions, reducing the cost of heating and therefore fuel poverty, improving comfort and health. Solid wall buildings constitute around 30% of UK housing stock, and are among the least efficient. However, the installation of solid wall insulation, while improving thermal performance can significantly affect the moisture balance of the building. This can result in mould growth, which can cause structural damage and lead to health problems for the occupants. This thesis explores the use of Natural Fibre Insulation (NFI) materials for internal solid wall insulation. The hygrothermal properties of a range of NFI materials are characterised in order to assess their potential for retrofit applications. This is followed by large-scale testing, which compares three solid wall insulation systems in controlled conditions, the results of which are used to validate a heat and moisture transfer model to further assess performance. Experimental results showed that the risk of interstitial condensation is significantly reduced by the application of natural fibre insulation in comparison to a conventional rigid foam system. Simulation of a solid wall exposed to climatic conditions for the UK revealed that the relative humidity at the interface between the masonry and insulation layers remained at 69% when internally insulated with hemp-lime and 96% with rigid foam insulation, while average moisture content of the masonry was 48% lower when hemp-lime was used. Field tests were also conducted to determine the thermal performance of two solid walls internally insulated with 80 mm of hemp-lime when exposed to real weather conditions. The thermal conductivity of the hemp-lime was found to be 30% higher than when measured in dry stead-state laboratory conditions due to the high moisture content of the masonry. However, its application still resulted in 66% and 68% reductions in the U-value compared to the uninsulated wall from 2.73 and 2.65 W/m2K to 0.93 and 0.86 W/m2K.

Brakus, Josko. "Mechanical properties of natural materials : an overview". Thesis, Massachusetts Institute of Technology, 1995. http://hdl.handle.net/1721.1/11553.

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Flores, Ramírez Eleonora [Verfasser], Martin [Akademischer Betreuer] Kaupenjohann, Martin [Gutachter] Kaupenjohann, Grabach Christina [Gutachter] Siebe e Jean Louis [Gutachter] Morel. "Purpose-designed technogenic materials for sustainable urban greening / Eleonora Flores Ramírez ; Gutachter: Martin Kaupenjohann, Christina Siebe Grabach, Jean Louis Morel ; Betreuer: Martin Kaupenjohann". Berlin : Technische Universität Berlin, 2018. http://d-nb.info/1169210341/34.

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Turvill, Michael W. "The synthesis of natural and synthetic colouring materials". Thesis, University of Nottingham, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.280103.

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Libri sul tema "Natural and technogenic materials":

Serebryakov, Oleg. Ecological and geological problems of development of oil and gas fields in the Caspian region. ru: INFRA-M Academic Publishing LLC., 2017. http://dx.doi.org/10.12737/24289.

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The paper summarizes and examined extensive evidence on the environmental, geological and technological challenges of exploration and production of oil and gas, encountered during the development of the gigantic fields. Investigated environmental problems of underground disposal of wastes, the formation of zones of technogenic pollution, ecology megalonyx pressures and many others. Describes the environmental effects of oil and gas companies on the environment. The proposal for reducing the negative anthropogenic influence on the geoecological conditions of the environment. Justified the monitoring of the exploration and exploitation of deposits of natural raw materials. Is designed to masters, post-graduate students and students studying on the specialty "Environmental Geology", "Geology and Geochemistry of combustible minerals", "Geology of marine oil and gas fields", "Hydrogeology and engineering Geology", a wide range of scientific and industrial workers of the oil and gas industry, high school teachers and graduate students geoenvironmental, environmental, oil and gas fields.

Burt, Erica. Natural materials. Vero Beach, FL: Rourke Enterprises, 1990.

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Thomas, Sabu, Chin Han Chan, Laly Pothen, Rajisha K. R. e Hanna Maria, a cura di. Natural Rubber Materials. Cambridge: Royal Society of Chemistry, 2013. http://dx.doi.org/10.1039/9781849737647.

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Thomas, Sabu, Chin Han Chan, Laly Pothen, Jithin Joy e Hanna Maria, a cura di. Natural Rubber Materials. Cambridge: Royal Society of Chemistry, 2013. http://dx.doi.org/10.1039/9781849737654.

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Hashizume, Hideo. Natural Mineral Materials. Tokyo: Springer Japan, 2022. http://dx.doi.org/10.1007/978-4-431-56924-4.

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Dey, Arjun, e Anoop Kumar Mukhopadhyay. Nanoindentation of Natural Materials. Boca Raton, FL : CRC Press, 2019.: CRC Press, 2018. http://dx.doi.org/10.1201/9781315155548.

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Wilhide, Elizabeth. Natural decorating: Sophisticated simplicity with natural materials. London: Conran Octopus, 1995.

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Chanturiia, V. A. Ėkologicheskie i tekhnologicheskie problemy pererabotki tekhnogennogo sulʹfidsoderzhashchego syrʹi︠a︡ =: Ecological and Technological Challenges in Processing of Technogenic Sulphidebearing Raw Materials. Apatity: Kolʹskiĭ nauch. t︠s︡entr RAN, 2005.

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1953-, Betts W. B., a cura di. Biodegradation: Natural and synthetic materials. London: Springer-Verlag, 1991.

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Matsuda, Shota R. Polymers as natural nanocomposites. New York: Nova Science Publishers, 2011.

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Più fonti

Capitoli di libri sul tema "Natural and technogenic materials":

Lyapin, Alexander A., Ivan A. Parinov, Nina I. Buravchuk, Alexander V. Cherpakov, Ol’ga V. Shilyaeva e Ol’ga V. Guryanova. "Problems of Using Technogenic Raw Materials". In Improving Road Pavement Characteristics, 3–7. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-59230-1_1.

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Buravchuk, N. I., O. V. Guryanova, M. A. Jani e E. P. Putri. "Mineral Additives from Technogenic Raw Materials". In Springer Proceedings in Physics, 605–18. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-78919-4_47.

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Volodchenko, A. A., V. S. Lesovik, A. N. Volodchenko e V. V. Voronov. "High-Efficiency Wall Materials Based on Technogenic Aluminosilicate Raw Materials". In Lecture Notes in Civil Engineering, 1–8. Cham: Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-20459-3_1.

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Krylenko, Marina, e Viacheslav Krylenko. "Evolution of the Tuzla Spit from Natural Geosystem to Natural-Technogenic One". In Advances in Science, Technology & Innovation, 143–46. Cham: Springer Nature Switzerland, 2023. http://dx.doi.org/10.1007/978-3-031-42917-0_32.

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Buravchuk, Nina, Olga Guryanova e E. P. Putri. "Use of Technogenic Raw Materials in the Technology of Ceramic Materials". In Springer Proceedings in Materials, 57–70. Cham: Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-21572-8_6.

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Papadopoulos, Christo. "Natural Lithography". In SpringerBriefs in Materials, 37–44. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-31742-7_6.

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Sychev, V. N., L. M. Bogomolov, D. V. Kostylev e N. V. Kostyleva. "Nonextensive Analysis of Natural and Technogenic Seismicity of Sakhalin Island". In Springer Proceedings in Earth and Environmental Sciences, 255–65. Cham: Springer Nature Switzerland, 2023. http://dx.doi.org/10.1007/978-3-031-50248-4_26.

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Wagner, Günther A. "Materials". In Natural Science in Archaeology, 21–56. Berlin, Heidelberg: Springer Berlin Heidelberg, 1998. http://dx.doi.org/10.1007/978-3-662-03676-1_2.

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Dollard, Tom. "Natural building materials". In Designed to Perform, 141–61. 2^a ed. London: RIBA Publishing, 2022. http://dx.doi.org/10.4324/9781003344100-9.

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Reineccius, Gary. "Natural Flavoring Materials". In Source Book of Flavors, 176–364. Boston, MA: Springer US, 1995. http://dx.doi.org/10.1007/978-1-4615-7889-5_7.

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Atti di convegni sul tema "Natural and technogenic materials":

Belov, Vladimir, Maksim Nesterenko e Elvira Galeeva. "Modern natural and technogenic geodynamic processes of the Southern Trans-Urals". In II INTERNATIONAL SCIENTIFIC AND PRACTICAL CONFERENCE “TECHNOLOGIES, MATERIALS SCIENCE AND ENGINEERING”. AIP Publishing, 2023. http://dx.doi.org/10.1063/5.0158349.

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Kenzhaliyev, B., T. Surkova, A. Berkinbayeva, Z. Dossymbayeva, D. Yesimova e B. Abdikerim. "On methods of modifying natural minerals". In Challenges of Science. Institute of Metallurgy and Ore Beneficiation, Satbayev University, 2021. http://dx.doi.org/10.31643/2021.20.

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Recently, more and more attention is paid to the ecological safety of the republic due to the increased threat of environmental pollution by radionuclides, particularly by uranium, while the processing of uranium-containing raw materials generates a significant amount of liquid industrial waste. The main waste disposal method is a sorption, which requires the use of inexpensive sorbents. Such sorbents can be obtained on the basis of domestic natural raw materials. The significant disadvantages of natural sorbents are a low sorption capacity, which can be increased by developing effective and relatively cheap methods for their modification. The absence of the methods of modification is a limiting factor for the widespread using of natural sorbents for environmental purposes. Variants of modification of natural aluminosilicate and coal-mineral raw materials of Kazakhstan by physical and chemical methods are considered. The chemical methods include the modification with a mixture of tributylphostat and di-2-ethylhexylphosphoric acid in kerosene to obtain "solid-phase extractants", a mixture of phosphoric acid and polyacrylamide, and the synthesis of organominerals. The possibility of using technogenic raw materials as a modifying reagent has been studied. Zeolite of the previously unexplored Kosmurun deposit and shungite of the Koksu deposit were selected for research, and slags of phosphorus production were selected as a technogenic raw materials. Their physical and chemical properties have been studied.

Naumov, Vladimir Alexandrovich, Oksana Borisovna Naumova, Vitaly Nikolaevich Bryukhov, Valery Valerievich Goldyrev, Vitaly Nikolaevtch Goldyrev e Ksenia Ilnurovna Plyusnina. "Natural-like technologies on the way of developing technogenic-mineral formations". In Проблемы минералогии, петрографии и металлогении. Научные чтения памяти П. Н. Чирвинского. ПЕРМСКИЙ ГОСУДАРСТВЕННЫЙ НАЦИОНАЛЬНЫЙ ИССЛЕДОВАТЕЛЬСКИЙ УНИВЕРСИТЕТ, 2022. http://dx.doi.org/10.17072/chirvinsky.2022.181.

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The development of mineral deposits is considered as an independent geological process. Nature-like technologies are considered, which can be used not only for "living", but also for "inanimate" nature. The products of processing deposits are considered not as “production waste”, but as an not rated mineral resource. It is shown that non-recoverable ore components, which could ensure the sale of additional products and savings in the use of natural resources, create environmental problems when they are destroyed in dumps. An algorithm for predictive assessment of the prospects for the use and management of the material composition of technogenic-mineral formations has been developed, sampling sites and methods for their study have been determined.

Mustafin, S. K., A. N. Trifonov, G. S. Anisimova e K. K. Struchkov. "MERCURY SAFETY IN THE CONTEXT OF FORECASTING, ASSESSING AND MONITORING THE GEOLOGICAL AND ENVIRONMENTAL RISKS OF SUBSOIL USE". In Проблемы минералогии, петрографии и металлогении. Научные чтения памяти П. Н. Чирвинского. ПЕРМСКИЙ ГОСУДАРСТВЕННЫЙ НАЦИОНАЛЬНЫЙ ИССЛЕДОВАТЕЛЬСКИЙ УНИВЕРСИТЕТ, 2022. http://dx.doi.org/10.17072/chirvinsky.2022.171.

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Mercury as a toxic pollutant of environmental components requires a quanti-tative assessment of the scale of emission and migration in the process of technogenic transformation of mining regions. The specific features of the concentration of mer-cury in natural mineral raw materials, commercial products and processing wastes are characterized by the example of mercury-containing copper pyrite deposits in the Urals. Mercury is used as a reliable element-tracer of the evolution of the technogenic system: mineral raw materials - subsoil waste - environmental components - food products - the human organism. An integrated approach is recommended for optimiz-ing forecasting, assessment and management of geological and environmental risks as tools for geological and environmental monitoring of a modern mining engineering system

Kuznetsov, Andrey, Andrey Kuznetsov, Yury Fedorov, Yury Fedorov, Paul Fattal e Paul Fattal. "CHRONOLOGY OF CONTEMPORARY SEDIMENTATION AND POLLUTANTS ACCUMULATION IN THE BOTTOM SEDIMENTS OF THE SEA OF AZOV". In Managing risks to coastal regions and communities in a changing world. Academus Publishing, 2017. http://dx.doi.org/10.31519/conferencearticle_5b1b93832aa160.22680750.

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Bottom sediments formed in the water bodies under the technogenic impact are important environmental factors affecting water quality and hydrobiota. Usually they consist of natural and technogenic material and differ from natural formations by their morphology, chemical and lithological composition, physicochemical and biochemical properties. In the present paper we use the term “sediment layer of anthropogenic impact” to define the sediment layer containing technogenic material and/or chemical pollutants. The determination of its location in the sediment cores, its thickness and accumulation chronology is an important scientific problem. In the paper the results of layer by layer study of Cs-137, Am-241, Pb-210 specific activities as well as concentrations of petroleum components, lead and mercury in 48 sediment cores of the Sea of Azov and the Don River are examined. The sediment core layers are dated by radiological methods. In all the sediment cores the peak of Cs-137 specific activity related to the Chernobyl accident was detected. In the Sea of Azov, this peak is located in the upper sediment layer up to 10 cm thick, however, in the delta and in the near-delta part of the Don River, where the sedimentation rates are more important, it is found at 20 to 40 cm depth. Also in certain sediment cores the second peak of Cs-137 related to the global nuclear fallout of the 1960s was found. The most of petroleum components, lead and mercury quantities are concentrated in the upper sediment layer formed in the last 50 to 70 years, i.e. in the period of the most important anthropogenic pressure. So, this complex approach based on the data on the vertical distribution of technogenic radionuclides and common pollutants in the sediment cores made it possible to identify and delineate the sediment layer of high anthropogenic impact as well as to assess the duration of this impact.

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Prokopov, I. I., P. M. Shonazarov, S. N. Darovskikh e N. N. Gudaev. "Hardware and software tools for modeling solar microwave radiation and natural magnetospheric disturbances". In III All-Russian Scientific Conference with International Participation "Science, technology, society: Environmental engineering for sustainable development of territories". Krasnoyarsk Science and Technology City Hall, 2022. http://dx.doi.org/10.47813/nto.3.2022.6.242-249.

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The relevance of the study of the evolutionary mechanisms of the interaction of objects of animate and inanimate nature with various types of radiation and fields, the source of which is the Sun, is substantiated. Conducting such studies is currently difficult due to the growing level of electromagnetic pollution of the environment. This does not allow carrying out experimental studies using real natural radiations and fields. They are possible only with the use of specialized hardware and software devices for their simulation. The presented materials of the article reflected the description of the original hardware and software tools for modeling the microwave radiation of the Sun and natural magnetospheric disturbances. When developing these devices, modern ideas about the frequency-time structure of radiation and fields of natural origin were used. The already existing positive experience of using the device for simulating solar microwave radiation in assessing the interaction of radiation generated by it with biological objects was also noted. First of all, it is associated with a decrease in the resistance properties of microorganisms, disaggregation of erythrocytes, etc. Such results, according to the authors, are associated with excitation in biological structures under the influence of natural radiation of elastic vibrations. They are also possible in the study of abiogenic materials. The features of their excitation when using natural radiations and fields are determined. The results of research using the developed hardware and software tools can be used as the basis for the creation of new technologies for reducing the influence of the technogenic factor on the life process of organisms. They will also find application in the development of methods for the synthesis of new abiogenic structures.

Ismatullaev, Ilyos, Jurabek Ulugmuratov, Avaz Kenjaev, Khashim Begaliev e Fazli Akyüz. "Investigation of the Process of Soaking when Processing Ostrich Skins". In The 9th International Conference on Advanced Materials and Systems. INCDTP - Leather and Footwear Research Institute (ICPI), Bucharest, Romania, 2022. http://dx.doi.org/10.24264/icams-2022.iii.12.

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In this work, the results of a study of the process of soaking in the processing of exotic leather raw materials of ostrich skins were carried out. In order to reduce the negative impact of wastewater from the tanning industry on the environment and to accelerate the soaking process, an enzyme preparation of microbial origin Letan SE2 and a surfactant CH-22C, which meets the requirements of the European regulations REACH and ECHA, were used. When these chemicals are used in the soaking process, mucopolysaccharides and non-collagen proteins are intensively removed from the interfiber space, the moisture content in the skin tissue of the ostrich skin increases, and uniform soaking in thickness and area is ensured. Intensive and correct soaking process improves the quality of subsequent processing of the ostrich skin. The paper shows the possibility of carrying out the soaking process using environmentally friendly chemicals, the use of which allows reducing the level of technogenic impact of chemicals on the environment, which is very important for the preservation of natural objects.

Irina, V. Shadrunova, e V. Kolodezhnaya Ekaterina. "Modern trends in waste recycling technologies of incinerators". In Challenges of Science. Institute of Metallurgy and Ore Beneficiation, 2023. http://dx.doi.org/10.31643/2023.12.

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In 2021, the Government of the Russian Federation set the executive authorities the task of decarbonizing Russian industry and developing an action plan for the transition to carbon regulation and sequestration of carbon dioxide emissions. One of the directions of carbon dioxide sequestration is mineral carbonation. The idea of the work is to use mineral carbonation, as an alternative to natural mineral raw materials, slags from the combustion of solid non-combustible waste. The technology of carbon sequestration by mineral carbonation of technogenic raw materials is at the research stage, therefore it is necessary to assess the potential of using waste incinerators. To solve the tasks, the material composition of the slags of one of the incinerators was studied in detail. The possibility of slag enrichment with the production of copper-containing preconcentrate has been established. The content of minerals capable of participating in carbonation was determined, and the carbonation potential was estimated based on the calculated values. The requirements for man-made waste for their use as raw materials for carbonation are formulated. The factors that have a restraining effect on the introduction of mineral carbonation technologies are highlighted.

Lesovik, V. S., O. V. Puchka, A. A. Volodchenko, E. S. Glagolev, N. V. Chernysheva e I. V. Lashina. "Effective Nature-Like Structural Thermal Insulation and Acoustic Composites Based on Technogenic Raw Materials". In Proceedings of the International Symposium “Engineering and Earth Sciences: Applied and Fundamental Research” (ISEES 2018). Paris, France: Atlantis Press, 2018. http://dx.doi.org/10.2991/isees-18.2018.32.

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Rapporti di organizzazioni sul tema "Natural and technogenic materials":

Myshakin, Evgeniy M., Vyacheslav N. Romanov e Randall Timothy Cygan. Natural materials for carbon capture. Office of Scientific and Technical Information (OSTI), novembre 2010. http://dx.doi.org/10.2172/1002102.

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Grubb, T. G. Constructing bald eagle nests with natural materials. Ft. Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Forest and Range Experiment Station, 1995. http://dx.doi.org/10.2737/rm-rn-535.

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Бабець, Євген Костянтинович, Ірина Петрівна Антонік, Ірина Євгенівна Мельникова e Антон Всеволодович Петрухін. nfluence of Mining and Concentration Works Activity on Land Resources. Petroșani, 2019. http://dx.doi.org/10.31812/123456789/3120.

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The research provides assessment of current and longer-term consequences of iron ore open pit mining for land resources of adjacent areas. There are applied methods of analysis of fund materials; comparison of topographic sheets and special maps, visual observation, soil testing, laboratory analyses and statistic processing of data obtained. It is revealed that facilities of iron ore mining and concentration waste accumulation (dumps and tailing ponds) are destructive factors for the local lithosphere, dust chemical contamination being the basic one. The steps aimed at reducing negative impacts of technogenic objects of the mining and raw material complex on the environment are under study.

KETCHAM, Richard, e Romy HANNA. Expert-guided CT beam hardening correction for heterogeneous natural materials. Cogeo@oeaw-giscience, settembre 2011. http://dx.doi.org/10.5242/iamg.2011.0283.

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Broome, Scott, Joshua Feldman, Jason Heath, Kristopher Kuhlman, Tina Nenoff, David Rademacher, Guangping Xu, Michelle Williams, Matthew Paul e Scott Broome. Effect of Zeolitization on Noble Gas Transport in Natural Materials. Office of Scientific and Technical Information (OSTI), marzo 2019. http://dx.doi.org/10.2172/1761849.

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Zhou, Hong-Cai J. System Development for Vehicular Natural Gas Storage Using Advanced Porous Materials. Office of Scientific and Technical Information (OSTI), marzo 2015. http://dx.doi.org/10.2172/1177205.

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Omelianenko, B. I., B. S. Niconov, B. I. Ryzhov e N. D. Shikina. Weathering products of basic rocks as sorptive materials of natural radionuclides. Office of Scientific and Technical Information (OSTI), giugno 1994. http://dx.doi.org/10.2172/87335.

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Gerald Sehlke e Paul Wichlacz. Idaho National Laboratory Materials and Fuels Complex Natural Phenomena Hazards Flood Assessment. Office of Scientific and Technical Information (OSTI), dicembre 2010. http://dx.doi.org/10.2172/1004236.

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Paredes, Juan Roberto, María Clara Ramos, Marina Robles e Emma Näslund-Hadley. Selecting and Using Sustainable Materials. Inter-American Development Bank, aprile 2015. http://dx.doi.org/10.18235/0006245.

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Abstract (sommario):

Thousands of children and young people who attend schools every day (on schedules ranging from 4 to 10 hours) consume large amounts of natural resources (water, trees made into paper, fossil fuels for energy, and others). These resources are used in the manufacturing of books, notepads, backpacks, pencils, paint, and so on. To a large extent, schools represent the way a society uses its natural resources. Using these materials in a more sustainable fashion will lower demand for natural resources. We can also learn innovative ways of using them in the learning process.

Nebeker, R. L. Idaho National Engineering Laboratory materials in inventory natural and enriched uranium management and storage costs. Office of Scientific and Technical Information (OSTI), novembre 1995. http://dx.doi.org/10.2172/195765.

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