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Avaliação da concentração de radionuclídeos de origem natural (NORM) e elementos de terras raras presentes na lama vermelha, proveniente dos estados do Pará e de São Paulo, Brasil
A mineração é uma atividade que gera receitas para alavancar a economia de um país, mas também gera resíduos. Os resíduos são considerados uma ameaça para o meio ambiente, mas podem ser reaproveitados. A lama vermelha, resíduo gerado no beneficiamento da bauxita, é rica em ferro, alumínio, silício e tem potencial como fonte secundária de terras raras. Porém, há pouca informação sobre a presença de terras raras e radionuclídeos naturais nesse resíduo gerado no Brasil. Sendo assim, esse trabalho teve como objetivo avaliar a concentração de radionuclídeos de origem natural (NORM) e terras raras em amostras de lama vermelha geradas nos Estados de São Paulo e do Pará. Para a avaliação dos NORMs da lama vermelha foi utilizada a técnica de Espectrometria gama e, para a quantificação das terras raras, as amostras de lama vermelha foram analisadas no ICP-AES (do inglês: Inductively Coupled Plasma – Atomic Emission Spectrometry) e ICP-MS (do inglês: Inductively Coupled Plasma – Mass Spectrometry).
Environmental Radioactivity from Natural, Industrial and Military Sources
Environmental Radioactivity from Natural, Industrial, and Military Sources is the comprehensive source of information on radiation in the environment and human exposure to radioactivity. This Fourth Edition isa complete revision and extension of the classic work, reflecting major new developments and concerns as the Cold War ended, nuclear weapons began to be dismantled, and cleanup of the nuclear weapons facilities assumed center stage. Contamination from accidents involving weapons, reactors, and radionuclide sources are discussed in an updated chapter, including the latest information about the effects of the Chernobyl accident. Important revisions are also made to the chapters on natural...
Ecotoxicology of Explosives
Managing sites contaminated with munitions constituents is an international challenge. Although the choice of approach and the use of Ecological Risk Assessment (ERA) tools may vary from country to country, the assurance of quality and the direction of ecotoxicological research are universally recognized as shared concerns. Drawing on a multidiscip
High Precision X-Ray Measurements
Since their discovery in 1895, the detection of X-rays has had a strong impact on and various applications in several fields of science and human life. Impressive efforts have been made to develop new types of detectors and new techniques, aiming to obtain higher precision both in terms of energy and position. Depending on the applications, solid state detectors, microcalorimeters, and various types of spectrometers currently serve as the best options for spectroscopic and imaging detectors. Recent advancements in micron and meV precision have opened the door for groundbreaking applications in fundamental physics, medical science, astrophysics, cultural heritage, and several other fields. Th...
Calcium Orthophosphates
Due to a great chemical similarity with the biological calcified tissues, many calcium orthophosphates possess remarkable biocompatibility and bioactivity. Materials scientists use this property extensively to construct artificial bone grafts that are either entirely made of or only surface-coated with the biologically relevant calcium orthophospha
Occupational Radiation Protection
The present Safety Guide provides general guidance on the establishment of an effective radiation protection programme for occupational exposure, appropriate for the sources of radiation likely to be encountered in a range of industries, medical institutions, educational and research establishments and nuclear fuel cycle facilities. The report further provides the necessary guidance to meet the requirements as laid down in Safety Series No. 115, International Basic Safety Standards for Protection against Ionizing Radiation and for the Safety of Radiation Sources (1996).
Novel Fire Retardant Polymers and Composite Materials
Novel Fire Retardant Polymers and Composite Materials reviews the latest scientific developments and technological advances in the design and manufacture of fire retardant polymers and composite materials. Fire retardant polymeric materials are used in a broad range of applications in fields such as aviation, automotive, computer, construction, electronics, and telecommunications. It is essential to have a better understanding of the scientific technology used in the design and manufacture of fire-resistant materials and their end products. This book includes the latest developments in fire retardant technologies for different polymeric material systems, such as PU, PP, PE, PLA, epoxy, rubber, textile, phenol resin, and PA, etc.
Cities of the Global South Reader
The Cities of the Global South Reader adopts a fresh and critical approach to the fi eld of urbanization in the developing world. The Reader incorporates both early and emerging debates about the diverse trajectories of urbanization processes in the context of the restructured global alignments in the last three decades. Emphasizing the historical legacies of colonialism, the Reader recognizes the entanglement of conditions and concepts often understood in binary relations: first/third worlds, wealth/poverty, development/underdevelopment, and inclusion/exclusion. By asking: “whose city? whose development?” the Reader rigorously highlights the fractures along lines of class, race, gender,...
Boulder Mono
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