Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 8 of 8 for “"RECOVERY OF METALS"”.
-
Strategies to Enable a Circular Economy in the Electronics Industry: Electrochemical Recovery of Metals
… increasingly rely on rare earth and specialty metals (e.g., yttrium, osmium, and indium; RESE). This may cause a bottleneck effect where demand for these metals cannot keep up with supply from primary extraction alone. Furthermore, few management strategies exist across the life cycle, leading …
-
Studies on the recovery of useful chemicals from waste and secondary materials
Chapter 1 of the thesis introduces the technique of hydrometal lurgy , and describes its background in relation to pyrometallurgy, the chemital methods used in hydrometallurgy and its application to metal recovery, with particular reference to the recovery of metals as useful compounds. Chapters 2 …
-
The effect of cross-linkage on internal diffusion in Dowex-50 ion exchange resin
<p>As far back as the time of Aristotle sand filters were used to purify water. However it was not until the time of Thompson and Way (1848), two English agricultural chemists, that the idea of actual exchange of ions was proposed. Ion exchange has been investigated extensively, resulting in …
-
Recovery of copper from low-grade ores by Aspergillus niger
The main concern of this study is to find a feasible and economical technique to recover metals from oxide low-grade ore microbially. Owing to the large quantities of metals that are embodied in low-grade ores and mining residues, these are considered new sources of metals. On the other hand they …
-
ΜΕΛΕΤΗ ΑΝΑΚΤΗΣΕΩΣ ΜΕΤΑΛΛΩΝ ΑΠΟ SCRAP
THE SUBJECT OF THE PRESENT THESIS IS THE RECOVERY OF METALS (MO, FE, CR, NI) FROM FERROUS SCRAP, AIMING TO THE FORMATION OF POWDER AS A FINAL PRODUCT. RESEARCH OF THE LOCAL MARKET LEADS US TO THE CHOICE OF A STAINLESS STEEL SCRAP (CONTAINING MO=2,7%) AND AN IRON SCRAP (FE=97,2%) AS RAW MATERIALS. …
-
The Application of Mineral Processing Techniques to the Scrap Recycling Industry
… plays an important role in the sustainability of a large global metal supply. Unfortunately, recycling lacks many standards, and test procedures in place for mineral processing. These standards and practices, if used in recycling, could aid recyclers in determining and achieving optimal …
-
Investigating ferric ion production and consumption trends in a simulated e-waste bioleaching environment for maximum metal dissolution efficiency
… electronic equipment has become an integral part of life in the modern world. When disposed of, it is termed Waste Electrical and Electronic Equipment (WEEE) and is one of the fastest growing waste streams in the world. Disposing the WEEE has associated risks as they contain a high amount of toxic …
-
Evaluation of solvent swelling pre-treatment combined with ammonia leaching using waste etchant from printed circuit board manufacturing for copper recovery from waste printed circuit boards
… growing waste stream, growing at a global rate of 2 Mt per annum and is expected to exceed 74 Mt by 2030. E-waste contains a high content of precious and base metals which can be recovered for economic benefit. This has made the recycling of this waste stream of interest, with particular …