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Languages : fr
Pages : 174
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Author:
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Category :
Languages : fr
Pages : 174
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Author: Organisation for Economic Co-operation and Development. Groupe de Recherche Routiere
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Languages : fr
Pages :
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Category :
Languages : fr
Pages : 48
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Author: Vasilica Nan Hammade
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Category :
Languages : fr
Pages : 372
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Ce travail s'inscrit dans la problematique generale de l'evaluation environnementale des dechets solidifies/stabilises utilises dans les materiaux de travaux publics, par substitution partielle ou totale de certains agregats. Il est consacre a l'etude des mecanismes de liberation des polluants a partir d'un dechet, avant et apres solidification, soumis a l'alteration meteorique, ainsi qu'a l'evaluation de la propagation des relargats. Le choix du dechet s'est porte sur des scories de premiere fusion de plomb et de zinc, et leurs solidification a ete assuree par ajout de liants hydrauliques. Apres une etude preliminaire, realisee sur plusieurs dechets et sous-produits industriels provenant de la region nord-pas de calais, un dechet representatif a ete selectionne et l'etude s'est poursuivie par une phase de caracterisation du dechet choisi, qui a permis d'acquerir un maximum de donnees, tant sur le plan chimique que sur le comportement du dechet brut et du dechet solidifie, avant et apres traitement. Le comportement a la lixiviation de polluants des dechets et dechets solidifies a base de ciment a ete etudie en relation avec differents contextes. Un calcul de speciation a ete aussi realise visant a determiner sous quelles especes aqueuses majeures les elements pb et zn etaient mobilisees. Un site experimental a ete mis en place, afin d'evaluer le comportement environnemental de ces scories solidifiees. Le scenario choisi est un scenario fictif qui correspond a une percolation d'eau a travers des dechets granulaires riches en metaux places en depot. L'utilisation des scories dans les sables-ciments n'est pas envisageable dans un type de structure, ou le contact materiau / pluie est favorise et ou aucune couche impermeabilisante n'est disposee (au contraire d'une structure routiere standard).
Author:
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Category : Civil engineering
Languages : fr
Pages : 266
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Author: F. A. Ortega Riegos
Publisher: WIT Press
ISBN: 1784662976
Category : Technology & Engineering
Languages : en
Pages : 447
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Containing the proceedings from the 9th International Conference on Waste Management and the Environment, this book is a collection of research on current waste disposal methods, as well as highlighting better practices and safer solutions for the future. Waste Management is one of the key problems of modern society due to the ever-expanding volume and complexity of discarded domestic and industrial waste. Society is increasingly aware of the need to establish better practices and safer solutions for waste disposal. This requires further investigation into disposal methods and recycling as well as new technologies to monitor landfills, industrial mining wastes and chemical and nuclear repositories. This creates a need for more research on current disposal methods such as landfills, incineration, chemical and effluent treatment, as well as recycling, clean technologies, waste monitoring, public and corporate awareness and general education. The papers contained in this title form a collective record of scientific information and work on the current situation of waste management amongst professionals, researchers, government departments and local authorities.
Author: Enric Vázquez
Publisher: RILEM Publications
ISBN: 9782912143525
Category : Building materials
Languages : en
Pages : 582
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Author: Mostafa Benzaazoua
Publisher: MDPI
ISBN: 3039281720
Category : Science
Languages : en
Pages : 172
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The extraction of apatite minerals is becoming more and more crucial with the depletion of high-grade ores. At the same time, many streams of waste are continuously being produced by the phosphate industry, including calcareous and siliceous waste rocks, clayey sludge and phosphogypsum. These waste products are produced in huge volumes reaching a ratio of between 5 to 10 tons of waste per each ton of concentrated phosphate. The management of these waste products is becoming a real issue in terms of growing public awareness and environmental and financial aspects. In addition, phosphate ores are known to contain other critical raw materials (CRM) such as rare earth elements and uranium. The recovery of these vital elements from phosphate waste may help to develop the needs of the green energy of the future and contribute to the achievement of the sustainable development goals. In this Special Issue, insights related to the following aspects were studied: phosphate extraction and beneficiation, novel phosphate ores, the fine characterization of phosphate ores and waste, phosphoric acid production, critical raw material (CRM) recovery from phosphate ores and waste, reprocessing of phosphate wastes and finally the valorization and reuse of phosphate waste and phosphogypsum.
Author: Organisation for Economic Co-operation and Development. Road Research Group on Techniques and Materials for the Maintenance of Road Surfacings
Publisher: Organisation for Economic Co-operation and Development ; [Washington, D.C. : sold by OECD Publications Center]
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Category : Technology & Engineering
Languages : en
Pages : 222
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Author: Organización de Cooperación y Desarrollo Económico
Publisher:
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Category :
Languages : es
Pages : 0
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