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Author: Olivier Pourret Publisher: ISBN: 9782914375474 Category : Languages : en Pages : 250
Book Description
Cette étude a permis (i) de montrer que la complexation des terres rares par la matière organique inhibe à la fois, l'oxydation du Ce et le développement d'un effet tetrad; (ii) de valider Model VI dans sa capacité à prédire la spéciation des terres rares dans les eaux organiques et de montrer que SHM n'y était pas apte; (iii) de fournir un jeu de constantes terres rares - acides humiques spécifiques à Model VI; (iv) de montrer que la compétition entre ligands, acides humiques et carbonates, induisait une répartition des terres rares entre ces deux ligands; (v) de mettre en évidence un nouveau mécanisme capable de développer, sans surface oxydante ou bactérie, une anomalie négative de Ce dans les eaux naturelles. La matière organique est responsable d'une forte complexation des terres rares dans les eaux naturelles. Une plus grande attention doit donc être portée à cette forme complexée et l'utilisation de l'anomalie de Ce comme témoin des conditions redox est remise en cause.
Author: Olivier Pourret Publisher: ISBN: 9782914375474 Category : Languages : en Pages : 250
Book Description
Cette étude a permis (i) de montrer que la complexation des terres rares par la matière organique inhibe à la fois, l'oxydation du Ce et le développement d'un effet tetrad; (ii) de valider Model VI dans sa capacité à prédire la spéciation des terres rares dans les eaux organiques et de montrer que SHM n'y était pas apte; (iii) de fournir un jeu de constantes terres rares - acides humiques spécifiques à Model VI; (iv) de montrer que la compétition entre ligands, acides humiques et carbonates, induisait une répartition des terres rares entre ces deux ligands; (v) de mettre en évidence un nouveau mécanisme capable de développer, sans surface oxydante ou bactérie, une anomalie négative de Ce dans les eaux naturelles. La matière organique est responsable d'une forte complexation des terres rares dans les eaux naturelles. Une plus grande attention doit donc être portée à cette forme complexée et l'utilisation de l'anomalie de Ce comme témoin des conditions redox est remise en cause.
Author: Gus Gunn Publisher: John Wiley & Sons ISBN: 1118755219 Category : Science Languages : en Pages : 468
Book Description
Mankind is using a greater variety of metals in greater quantities than ever before. As a result there is increasing global concern over the long-term availability of secure and adequate supplies of the metals needed by society. Critical metals, which are those of growing economic importance that might be susceptible to future scarcity, are a particular worry. For many of these we have little information on how they are concentrated in the Earth’s crust, how to extract them from their ores, and how to use, recycle and dispose of them effectively and safely. Published with the British Geological Survey, the Critical Metals Handbook brings together a wealth of knowledge on critical metals and provides a foundation for improving the future security and sustainability of critical metal supplies. Written by international experts, it provides a unique source of authoritative information on diverse aspects of the critical metals, including geology, deposits, processing, applications, recycling, environmental issues and markets. It is aimed at a broad non-specialist audience, including professionals and academics working in the exploration and mining sectors, in mining finance and investment, and in mineral processing and manufacturing. It will also be a valuable reference for policy makers concerned with resource management, land-use planning, eco-efficiency, recycling and related fields.
Author: David A. Atwood Publisher: John Wiley & Sons ISBN: 111863263X Category : Science Languages : en Pages : 994
Book Description
Lanthanides are of great importance for the electronic industries, this new book (from the EIBC Book Series) provides a comprehensive coverage of the basic chemistry, particularly inorganic chemistry, of the lanthanoid elements, those having a 4f shell of electrons. A chapter is describing the similarity of the Group 3 elements, Sc, Y, La, the group from which the lanthanoids originate and the group 13 elements, particularly aluminum, having similar properties. Inclusion of the group 3 and 13 elements demonstrates how the lanthanoid elements relate to other, more common, elements in the Periodic Table. Beginning chapters describe the occurrence and mineralogy of the elements, with a focus on structural features observed in compounds described in later chapters. The majority of the chapters is organized by the oxidation state of the elements, Ln(0), Ln(II), Ln(III), and Ln(IV). Within this organization the chapters are further distinguished by type of compound, inorganic (oxides and hydroxides, aqueous speciation, halides, alkoxides, amides and thiolates, and chelates) and organometallic. Concluding chapters deal with diverse and critically important applications of the lanthanoids in electronic and magnetic materials, and medical imaging.
Author: Otto G. Piringer Publisher: John Wiley & Sons ISBN: 3527621431 Category : Science Languages : en Pages : 632
Book Description
Plastics are the most important class of packaging materials. This successful handbook, now in its second edition, covers all important aspects of plastic packaging and the interdisciplinary knowledge needed by food chemists, pharmaceutical chemists, food technologists, materials scientists, process engineers, and product developers alike. This is an indispensable resource in the search for the optimal plastic packaging. Materials characteristics, additives and their effects, mass transport phenomena, quality assurance, and recent regulatory requirements from FDA and European Commission are covered in detail with ample data.
Book Description
Earthen architecture constitutes one of the most diverse forms of cultural heritage and one of the most challenging to preserve. It dates from all periods and is found on all continents but is particularly prevalent in Africa, where it has been a building tradition for centuries. Sites range from ancestral cities in Mali to the palaces of Abomey in Benin, from monuments and mosques in Iran and Buddhist temples on the Silk Road to Spanish missions in California. This volume's sixty-four papers address such themes as earthen architecture in Mali, the conservation of living sites, local knowledge systems and intangible aspects, seismic and other natural forces, the conservation and management of archaeological sites, research advances, and training.
Author: Ahmed Belasri Publisher: Springer Nature ISBN: 9811554447 Category : Technology & Engineering Languages : en Pages : 659
Book Description
This book highlights peer reviewed articles from the 1st International Conference on Renewable Energy and Energy Conversion, ICREEC 2019, held at Oran in Algeria. It presents recent advances, brings together researchers and professionals in the area and presents a platform to exchange ideas and establish opportunities for a sustainable future. Topics covered in this proceedings, but not limited to, are photovoltaic systems, bioenergy, laser and plasma technology, fluid and flow for energy, software for energy and impact of energy on the environment.
Author: Food and Agriculture Organization of the United Nations Publisher: Food & Agriculture Org. ISBN: 9789251055212 Category : Technology & Engineering Languages : en Pages : 116
Book Description
Soils are affected by human activities, such as industrial, municipal and agriculture, that often result in soil degradation and loss. In order to prevent soil degradation and to rehabilitate the potentials of degraded soils, reliable soil data are the most important prerequisites for the design of appropriate land-use systems and soil management practices as well as for a better understanding of the environment. The availability of reliable information on soil morphology and other characteristics obtained through examination and description of the soil in the field is essential, and the use of a common language is of prime importance. These guidelines, based on the latest internationally accepted systems and classifications, provide a complete procedure for soil description and for collecting field data. To help beginners, some explanatory notes are included as well as keys based on simple test and observations.--Publisher's description.
Author: Canada. Department of Fisheries and Oceans Publisher: Peches Et Oceans Direction Generale Des Communications = Fisheries and Oceans Communications Dir ISBN: Category : Science Languages : fr Pages : 376
Book Description
Proceedings of a workshop, the scientific reviews and the contributed papers presented at the symposium. The document presents a brief historical summary of marine research in the Gulf; reports the discussions, conclusions and recommendations of the different working groups on oceanography (physics, biology, chemistry and sedimentology) and on the fishery (fish and invertebrates); then presents the discussions of each multidisciplinary working group, centered around how the St. Lawrence system may be used as a natural laboratory which will contribute to the solution of major long-term problems of conservation of natural resources and of the quality of the environment.
Author: Linda Strande Publisher: IWA Publishing ISBN: 1780404735 Category : Technology & Engineering Languages : en Pages : 428
Book Description
It is estimated that literally billions of residents in urban and peri-urban areas of Africa, Asia, and Latin America are served by onsite sanitation systems (e.g. various types of latrines and septic tanks). Until recently, the management of faecal sludge from these onsite systems has been grossly neglected, partially as a result of them being considered temporary solutions until sewer-based systems could be implemented. However, the perception of onsite or decentralized sanitation technologies for urban areas is gradually changing, and is increasingly being considered as long-term, sustainable options in urban areas, especially in low- and middle-income countries that lack sewer infrastructures. This is the first book dedicated to faecal sludge management. It compiles the current state of knowledge of the rapidly evolving field of faecal sludge management, and presents an integrated approach that includes technology, management, and planning based on Sandecs 20 years of experience in the field. Faecal Sludge Management: Systems Approach for Implementation and Operation addresses the organization of the entire faecal sludge management service chain, from the collection and transport of sludge, and the current state of knowledge of treatment options, to the final end use or disposal of treated sludge. The book also presents important factors to consider when evaluating and upscaling new treatment technology options. The book is designed for undergraduate and graduate students, and engineers and practitioners in the field who have some basic knowledge of environmental and/or wastewater engineering.
Author: Olivier Pourret
Author: Olivier Pourret
Author: International Development Research Centre (Canada)
Author: Gus Gunn
Author: David A. Atwood
Author: Otto G. Piringer
Author: Leslie Rainer
Author: Ahmed Belasri
Author: Food and Agriculture Organization of the United Nations
Author: Canada. Department of Fisheries and Oceans
Author: Linda Strande